sources-request@mirror.UUCP (06/25/86)
Submitted by: talcott!topaz!lll-crg!csustan!casey
Mod.sources: Volume 6, Issue 19
Archive-name: less.path
[ This posting contains a couple of features designed to have less and
more "interoperate" more easily. I have edited the prolog Casey
sent with his submission. In the next couple of paragraphs, read "I"
as "Leith (Casey) Leedom," not "Rich $alz." --r$]
I modified less to accept a command line parameter of the form "-number",
used to change the window scrolling size. Some programs pass this on to
more, so I added it for compatibility. This is reflected in the updated
manual page.
Not all programs that use a pager (e.g., man in the August seismo BSD2.9
distribution) refer to the $PAGER environment variable. I therefore
wrote a small program designed to supplant /usr/ucb/more, or whatever
the local pager is. It looks for $PAGER, and executes the indicated
program with the passed parameters, othherwise, it executes the default
pager (moved to somewhere else, like /usr/ucb/More) with the passed
parameters.
Also included are new versions of the makefiles, modified for pager_patch.
I've also included new versions of all the makefiles (only slightly
modified). The makefiles for Xenix and SYSV should be fixed to indicate
where Xenix and SYSV keep their standard pagers (I have no idea myself) - as
of now, they're both set to /usr/ucb/more. "Make pager_patch" will make
the pager patch; "make install_pager_patch" will move the OLD_PAGER to
OLD_PAGER_NEW_LOCATION and install the pager patch in OLD_PAGER.
Leith (Casey) Leedom lll-crg.arpa!csustan!casey
Computer Science Department work: (209) 667-3185
California State University, Stanislaus home: (209) 634-2775
Turlock, CA 95380
-------------------- cut here --------------------
#! /bin/sh
# This is a shell archive, meaning:
# 1. Remove everything above the #! /bin/sh line.
# 2. Save the resulting text in a file.
# 3. Execute the file with /bin/sh (not csh) to create:
# option.c
# screen.c
# command.c
# less.l
# pager_patch.c
# makefile.bsd41
# makefile.bsd42
# makefile.sys5
# makefile.xen
# This archive created: Fri May 30 00:03:32 1986
export PATH; PATH=/bin:/usr/bin:$PATH
if test -f 'option.c'
then
echo shar: "will not over-write existing file 'option.c'"
else
cat << \SHAR_EOF > 'option.c'
/*
* Process command line options.
* Each option is a single letter which controls a program variable.
* The options have defaults which may be changed via
* the command line option, or toggled via the "-" command.
*/
#include "less.h"
#define toupper(c) ((c)-'a'+'A')
/*
* Types of options.
*/
#define BOOL 01 /* Boolean option: 0 or 1 */
#define TRIPLE 02 /* Triple-valued option: 0, 1 or 2 */
#define NUMBER 04 /* Numeric option */
#define NO_TOGGLE 0100 /* Option cannot be toggled with "-" cmd */
/*
* Variables controlled by command line options.
*/
public int p_nbufs, f_nbufs; /* Number of buffers. There are two values,
one used for input from a pipe and
the other for input from a file. */
public int clean_data; /* Can we assume the data is "clean"?
(That is, free of nulls, etc) */
public int quiet; /* Should we suppress the audible bell? */
public int top_search; /* Should forward searches start at the top
of the screen? (alternative is bottom) */
public int top_scroll; /* Repaint screen from top?
(alternative is scroll from bottom) */
public int pr_type; /* Type of prompt (short, medium, long) */
public int bs_mode; /* How to process backspaces */
public int know_dumb; /* Don't complain about dumb terminals */
public int quit_at_eof; /* Quit after hitting end of file twice */
public int squeeze; /* Squeeze multiple blank lines into one */
public int tabstop; /* Tab settings */
public int back_scroll; /* Repaint screen on backwards movement */
public int twiddle; /* Display "~" for lines after EOF */
extern int nbufs;
extern int sc_window;
extern char *first_cmd;
extern char *every_first_cmd;
#define DEF_F_NBUFS 5 /* Default for f_nbufs */
#define DEF_P_NBUFS 12 /* Default for p_nbufs */
static struct option
{
char oletter; /* The controlling letter (a-z) */
char otype; /* Type of the option */
int odefault; /* Default value */
int *ovar; /* Pointer to the associated variable */
char *odesc[3]; /* Description of each value */
} option[] =
{
{ 'c', BOOL, 0, &clean_data,
{ "Don't assume data is clean",
"Assume data is clean",
NULL
}
},
{ 'd', BOOL|NO_TOGGLE, 0, &know_dumb,
{ NULL, NULL, NULL}
},
{ 'e', BOOL, 0, &quit_at_eof,
{ "Don't quit at end-of-file",
"Quit at end-of-file",
NULL
}
},
{ 'h', NUMBER, -1, &back_scroll,
{ "Backwards scroll limit is %d lines",
NULL, NULL
}
},
{ 'p', BOOL, 0, &top_scroll,
{ "Repaint by scrolling from bottom of screen",
"Repaint by painting from top of screen",
NULL
}
},
{ 'x', NUMBER, 8, &tabstop,
{ "Tab stops every %d spaces",
NULL, NULL
}
},
{ 's', BOOL, 0, &squeeze,
{ "Don't squeeze multiple blank lines",
"Squeeze multiple blank lines",
NULL
}
},
{ 't', BOOL, 1, &top_search,
{ "Forward search starts from bottom of screen",
"Forward search starts from top of screen",
NULL
}
},
{ 'w', BOOL, 1, &twiddle,
{ "Display nothing for lines after end-of-file",
"Display ~ for lines after end-of-file",
NULL
}
},
{ 'm', TRIPLE, 0, &pr_type,
{ "Prompt with a colon",
"Prompt with a message",
"Prompt with a verbose message"
}
},
{ 'q', TRIPLE, 0, &quiet,
{ "Ring the bell for errors AND at eof/bof",
"Ring the bell for errors but not at eof/bof",
"Never ring the bell"
}
},
{ 'u', TRIPLE, 0, &bs_mode,
{ "Underlined text displayed in underline mode",
"All backspaces cause overstrike",
"Backspaces print as ^H"
}
},
{ 'z', NUMBER, 24, &sc_window,
{ "Scroll window size is %d lines",
NULL, NULL
}
},
{ '\0' }
};
public char all_options[64]; /* List of all valid options */
/*
* Initialize each option to its default value.
*/
public void
init_option()
{
register struct option *o;
register char *p;
/*
* First do special cases, not in option table.
*/
first_cmd = every_first_cmd = NULL;
f_nbufs = DEF_F_NBUFS; /* -bf */
p_nbufs = DEF_P_NBUFS; /* -bp */
p = all_options;
*p++ = 'b';
for (o = option; o->oletter != '\0'; o++)
{
/*
* Set each variable to its default.
* Also make a list of all options, in "all_options".
*/
*(o->ovar) = o->odefault;
*p++ = o->oletter;
if (o->otype & TRIPLE)
*p++ = toupper(o->oletter);
}
*p = '\0';
}
/*
* Toggle command line flags from within the program.
* Used by the "-" command.
*/
public void
toggle_option(c)
int c;
{
register struct option *o;
char message[100];
char buf[5];
/*
* First check for special cases not handled by the option table.
*/
switch (c)
{
case 'b':
sprintf(message, "%d buffers", nbufs);
error(message);
return;
}
for (o = option; o->oletter != '\0'; o++)
{
if ((o->otype & BOOL) && (o->oletter == c) &&
(o->otype & NO_TOGGLE) == 0)
{
/*
* Boolean option:
* just toggle it.
*/
*(o->ovar) = ! *(o->ovar);
error(o->odesc[*(o->ovar)]);
return;
} else if ((o->otype & TRIPLE) && (o->oletter == c) &&
(o->otype & NO_TOGGLE) == 0)
{
/*
* Triple-valued option with lower case letter:
* make it 1 unless already 1, then make it 0.
*/
*(o->ovar) = (*(o->ovar) == 1) ? 0 : 1;
error(o->odesc[*(o->ovar)]);
return;
} else if ((o->otype & TRIPLE) && (toupper(o->oletter) == c) &&
(o->otype & NO_TOGGLE) == 0)
{
/*
* Triple-valued option with upper case letter:
* make it 2 unless already 2, then make it 0.
*/
*(o->ovar) = (*(o->ovar) == 2) ? 0 : 2;
error(o->odesc[*(o->ovar)]);
return;
} else if ((o->otype & NUMBER) && (o->oletter == c) &&
(o->otype & NO_TOGGLE) == 0)
{
sprintf(message, o->odesc[0], *(o->ovar));
error(message);
return;
}
}
if (control_char(c))
sprintf(buf, "^%c", carat_char(c));
else
sprintf(buf, "%c", c);
sprintf(message, "\"-%s\": no such flag. Use one of \"%s\"",
buf, all_options);
error(message);
}
/*
* Scan an argument (either from command line or from LESS environment
* variable) and process it.
*/
public void
scan_option(s)
char *s;
{
register struct option *o;
register int c;
if (s == NULL)
return;
next:
if (*s == '\0')
return;
switch (c = *s++)
{
case '-':
case ' ':
case '\t':
goto next;
case '+':
if (*s == '+')
every_first_cmd = ++s;
first_cmd = s;
return;
case 'b':
switch (*s)
{
case 'f':
s++;
f_nbufs = getnum(&s, 'b');
break;
case 'p':
s++;
p_nbufs = getnum(&s, 'b');
break;
default:
f_nbufs = p_nbufs = getnum(&s, 'b');
break;
}
goto next;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
/*
* Handle special "more" compatibility form "-number"
* to set the scrolling window size.
*/
s--;
sc_window = getnum(&s, '-');
goto next;
}
}
for (o = option; o->oletter != '\0'; o++)
{
if ((o->otype & BOOL) && (o->oletter == c))
{
*(o->ovar) = ! o->odefault;
goto next;
} else if ((o->otype & TRIPLE) && (o->oletter == c))
{
*(o->ovar) = (o->odefault == 1) ? 0 : 1;
goto next;
} else if ((o->otype & TRIPLE) && (toupper(o->oletter) == c))
{
*(o->ovar) = (o->odefault == 2) ? 0 : 2;
goto next;
} else if ((o->otype & NUMBER) && (o->oletter == c))
{
*(o->ovar) = getnum(&s, c);
goto next;
}
}
printf("\"-%c\": invalid flag\n", c);
exit(1);
}
/*
* Translate a string into a number.
* Like atoi(), but takes a pointer to a char *, and updates
* the char * to point after the translated number.
*/
static int
getnum(sp, c)
char **sp;
int c;
{
register char *s;
register int n;
s = *sp;
if (*s < '0' || *s > '9')
{
printf("number is required after -%c\n", c);
exit(1);
}
n = 0;
while (*s >= '0' && *s <= '9')
n = 10 * n + *s++ - '0';
*sp = s;
return (n);
}
SHAR_EOF
fi
if test -f 'screen.c'
then
echo shar: "will not over-write existing file 'screen.c'"
else
cat << \SHAR_EOF > 'screen.c'
/*
* Routines which deal with the characteristics of the terminal.
* Uses termcap to be as terminal-independent as possible.
*
* {{ Someday this should be rewritten to use curses. }}
*/
#include "less.h"
#if XENIX
#include <sys/types.h>
#include <sys/ioctl.h>
#endif
#if TERMIO
#include <termio.h>
#else
#include <sgtty.h>
#endif
/*
* Strings passed to tputs() to do various terminal functions.
*/
static char
*sc_pad, /* Pad string */
*sc_home, /* Cursor home */
*sc_addline, /* Add line, scroll down following lines */
*sc_lower_left, /* Cursor to last line, first column */
*sc_move, /* General cursor positioning */
*sc_clear, /* Clear screen */
*sc_eol_clear, /* Clear to end of line */
*sc_s_in, /* Enter standout (highlighted) mode */
*sc_s_out, /* Exit standout mode */
*sc_u_in, /* Enter underline mode */
*sc_u_out, /* Exit underline mode */
*sc_visual_bell, /* Visual bell (flash screen) sequence */
*sc_backspace, /* Backspace cursor */
*sc_init, /* Startup terminal initialization */
*sc_deinit; /* Exit terminal de-intialization */
static int dumb;
static int hard;
public int auto_wrap; /* Terminal does \r\n when write past margin */
public int ignaw; /* Terminal ignores \n immediately after wrap */
public int erase_char, kill_char; /* The user's erase and line-kill chars */
public int sc_width, sc_height; /* Height & width of screen */
public int sc_window = -1; /* window size for forward and backward */
public int ul_width, ue_width; /* Printing width of underline sequences */
public int so_width, se_width; /* Printing width of standout sequences */
/*
* These two variables are sometimes defined in,
* and needed by, the termcap library.
* It may be necessary on some systems to declare them extern here.
*/
/*extern*/ short ospeed; /* Terminal output baud rate */
/*extern*/ char PC; /* Pad character */
extern int quiet; /* If VERY_QUIET, use visual bell for bell */
extern int know_dumb; /* Don't complain about a dumb terminal */
extern int back_scroll;
char *tgetstr();
char *tgoto();
/*
* Change terminal to "raw mode", or restore to "normal" mode.
* "Raw mode" means
* 1. An outstanding read will complete on receipt of a single keystroke.
* 2. Input is not echoed.
* 3. On output, \n is mapped to \r\n.
* 4. \t is NOT be expanded into spaces.
* 5. Signal-causing characters such as ctrl-C (interrupt),
* etc. are NOT disabled.
* It doesn't matter whether an input \n is mapped to \r, or vice versa.
*/
public void
raw_mode(on)
int on;
{
#if TERMIO
struct termio s;
static struct termio save_term;
if (on)
{
/*
* Get terminal modes.
*/
ioctl(2, TCGETA, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
save_term = s;
ospeed = s.c_cflag & CBAUD;
erase_char = s.c_cc[VERASE];
kill_char = s.c_cc[VKILL];
/*
* Set the modes to the way we want them.
*/
s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
s.c_oflag |= (OPOST|ONLCR|TAB3);
s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
s.c_cc[VMIN] = 1;
s.c_cc[VTIME] = 0;
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
ioctl(2, TCSETAW, &s);
#else
struct sgttyb s;
static struct sgttyb save_term;
if (on)
{
/*
* Get terminal modes.
*/
ioctl(2, TIOCGETP, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
save_term = s;
ospeed = s.sg_ospeed;
erase_char = s.sg_erase;
kill_char = s.sg_kill;
/*
* Set the modes to the way we want them.
*/
s.sg_flags |= CBREAK;
s.sg_flags &= ~(ECHO|XTABS);
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
ioctl(2, TIOCSETN, &s);
#endif
}
static int couldnt = 0;
static void
cannot(s)
char *s;
{
if (know_dumb)
/*
* He knows he has a dumb terminal, so don't tell him.
*/
return;
printf("WARNING: terminal cannot \"%s\"\n", s);
couldnt = 1;
}
/*
* Get terminal capabilities via termcap.
*/
public void
get_term()
{
char termbuf[1024];
char *sp;
static char sbuf[150];
char *getenv();
/*
* Find out what kind of terminal this is.
*/
if (tgetent(termbuf, getenv("TERM")) <= 0)
dumb = 1;
/*
* Get size of the screen.
*/
if (dumb || (sc_height = tgetnum("li")) < 0 || tgetflag("hc"))
{
/* Oh no, this is a hardcopy terminal. */
hard = 1;
sc_height = 24;
}
/*
* This is terrible - the following if "knows" that it is being
* executed *after* command line and environment options have
* already been parsed. Should it be executed in the main program
* instead?
*/
if ((sc_window <= 0) || (sc_window >= sc_height))
sc_window = sc_height-1;
if (dumb || (sc_width = tgetnum("co")) < 0)
sc_width = 80;
auto_wrap = tgetflag("am");
ignaw = tgetflag("xn");
/*
* Assumes termcap variable "sg" is the printing width of
* the standout sequence, the end standout sequence,
* the underline sequence, and the end underline sequence.
*/
if ((ul_width = tgetnum("sg")) < 0)
ul_width = 0;
so_width = se_width = ue_width = ul_width;
/*
* Get various string-valued capabilities.
*/
sp = sbuf;
sc_pad = (dumb) ? NULL : tgetstr("pc", &sp);
if (sc_pad != NULL)
PC = *sc_pad;
sc_init = (dumb) ? NULL : tgetstr("ti", &sp);
if (sc_init == NULL)
sc_init = "";
sc_deinit= (dumb) ? NULL : tgetstr("te", &sp);
if (sc_deinit == NULL)
sc_deinit = "";
sc_eol_clear = (dumb) ? NULL : tgetstr("ce", &sp);
if (hard || sc_eol_clear == NULL || *sc_eol_clear == '\0')
{
cannot("clear to end of line");
sc_eol_clear = "";
}
sc_clear = (dumb) ? NULL : tgetstr("cl", &sp);
if (hard || sc_clear == NULL || *sc_clear == '\0')
{
cannot("clear screen");
sc_clear = "\n\n";
}
sc_move = (dumb) ? NULL : tgetstr("cm", &sp);
if (hard || sc_move == NULL || *sc_move == '\0')
{
/*
* This is not an error here, because we don't
* always need sc_move.
* We need it only if we don't have home or lower-left.
*/
sc_move = "";
}
sc_s_in = (dumb) ? NULL : tgetstr("so", &sp);
if (hard || sc_s_in == NULL)
sc_s_in = "";
sc_s_out = (dumb) ? NULL : tgetstr("se", &sp);
if (hard || sc_s_out == NULL)
sc_s_out = "";
sc_u_in = (dumb) ? NULL : tgetstr("us", &sp);
if (hard || sc_u_in == NULL)
sc_u_in = sc_s_in;
sc_u_out = (dumb) ? NULL : tgetstr("ue", &sp);
if (hard || sc_u_out == NULL)
sc_u_out = sc_s_out;
sc_visual_bell = (dumb) ? NULL : tgetstr("vb", &sp);
if (hard || sc_visual_bell == NULL)
sc_visual_bell = "";
sc_home = (dumb) ? NULL : tgetstr("ho", &sp);
if (hard || sc_home == NULL || *sc_home == '\0')
{
if (*sc_move == '\0')
{
cannot("home cursor");
/*
* This last resort for sc_home is supposed to
* be an up-arrow suggesting moving to the
* top of the "virtual screen". (The one in
* your imagination as you try to use this on
* a hard copy terminal.)
*/
sc_home = "|\b^";
} else
{
/*
* No "home" string,
* but we can use "move(0,0)".
*/
strcpy(sp, tgoto(sc_move, 0, 0));
sc_home = sp;
sp += strlen(sp) + 1;
}
}
sc_lower_left = (dumb) ? NULL : tgetstr("ll", &sp);
if (hard || sc_lower_left == NULL || *sc_lower_left == '\0')
{
if (*sc_move == '\0')
{
cannot("move cursor to lower left of screen");
sc_lower_left = "\r";
} else
{
/*
* No "lower-left" string,
* but we can use "move(0,last-line)".
*/
strcpy(sp, tgoto(sc_move, 0, sc_height-1));
sc_lower_left = sp;
sp += strlen(sp) + 1;
}
}
/*
* To add a line at top of screen and scroll the display down,
* we use "al" (add line) or "sr" (scroll reverse).
*/
if (dumb)
sc_addline = NULL;
else if ((sc_addline = tgetstr("al", &sp)) == NULL ||
*sc_addline == '\0')
sc_addline = tgetstr("sr", &sp);
if (hard || sc_addline == NULL || *sc_addline == '\0')
{
cannot("scroll backwards");
sc_addline = "";
/* Force repaint on any backward movement */
back_scroll = 0;
}
if (dumb || tgetflag("bs"))
sc_backspace = "\b";
else
{
sc_backspace = tgetstr("bc", &sp);
if (sc_backspace == NULL || *sc_backspace == '\0')
sc_backspace = "\b";
}
if (couldnt)
/* Give him time to read all the "cannot" messages. */
error("");
}
/*
* Below are the functions which perform all the
* terminal-specific screen manipulation.
*/
/*
* Initialize terminal
*/
public void
init()
{
tputs(sc_init, sc_height, putc);
}
/*
* Deinitialize terminal
*/
public void
deinit()
{
tputs(sc_deinit, sc_height, putc);
}
/*
* Home cursor (move to upper left corner of screen).
*/
public void
home()
{
tputs(sc_home, 1, putc);
}
/*
* Add a blank line (called with cursor at home).
* Should scroll the display down.
*/
public void
add_line()
{
tputs(sc_addline, sc_height, putc);
}
/*
* Move cursor to lower left corner of screen.
*/
public void
lower_left()
{
tputs(sc_lower_left, 1, putc);
}
/*
* Ring the terminal bell.
*/
public void
bell()
{
if (quiet == VERY_QUIET)
vbell();
else
putc('\7');
}
/*
* Output the "visual bell", if there is one.
*/
public void
vbell()
{
if (*sc_visual_bell == '\0')
return;
tputs(sc_visual_bell, sc_height, putc);
}
/*
* Clear the screen.
*/
public void
clear()
{
tputs(sc_clear, sc_height, putc);
}
/*
* Clear from the cursor to the end of the cursor's line.
* {{ This must not move the cursor. }}
*/
public void
clear_eol()
{
tputs(sc_eol_clear, 1, putc);
}
/*
* Begin "standout" (bold, underline, or whatever).
*/
public void
so_enter()
{
tputs(sc_s_in, 1, putc);
}
/*
* End "standout".
*/
public void
so_exit()
{
tputs(sc_s_out, 1, putc);
}
/*
* Begin "underline" (hopefully real underlining,
* otherwise whatever the terminal provides).
*/
public void
ul_enter()
{
tputs(sc_u_in, 1, putc);
}
/*
* End "underline".
*/
public void
ul_exit()
{
tputs(sc_u_out, 1, putc);
}
/*
* Erase the character to the left of the cursor
* and move the cursor left.
*/
public void
backspace()
{
/*
* Try to erase the previous character by overstriking with a space.
*/
tputs(sc_backspace, 1, putc);
putc(' ');
tputs(sc_backspace, 1, putc);
}
/*
* Output a plain backspace, without erasing the previous char.
*/
public void
putbs()
{
tputs(sc_backspace, 1, putc);
}
SHAR_EOF
fi
if test -f 'command.c'
then
echo shar: "will not over-write existing file 'command.c'"
else
cat << \SHAR_EOF > 'command.c'
/*
* User-level command processor.
*/
#include "less.h"
#include "position.h"
#include <setjmp.h>
extern jmp_buf main_loop;
extern int erase_char, kill_char;
extern int pr_type;
extern int sigs;
extern int ispipe;
extern int quit_at_eof;
extern int hit_eof;
extern int sc_width, sc_height;
extern int sc_window;
extern char *first_cmd;
extern char version[];
extern char current_file[];
extern char *editor;
static char cmdbuf[90]; /* Buffer for holding a multi-char command */
static char *cp; /* Pointer into cmdbuf */
static int cmd_col; /* Current column of the multi-char command */
static char mcc; /* The multi-char command letter (e.g. '/') */
static char last_mcc; /* The previous mcc */
/*
* Reset command buffer (to empty).
*/
cmd_reset()
{
cp = cmdbuf;
}
/*
* Backspace in command buffer.
*/
static int
cmd_erase()
{
if (cp == cmdbuf)
/*
* Backspace past beginning of the string:
* this usually means abort the command.
*/
return (1);
if (control_char(*--cp))
{
/*
* Erase an extra character, for the carat.
*/
backspace();
cmd_col--;
}
backspace();
cmd_col--;
return (0);
}
/*
* Set up the display to start a new multi-character command.
*/
start_mcc()
{
lower_left();
clear_eol();
putc(mcc);
cmd_col = 1;
}
/*
* Process a single character of a multi-character command, such as
* a number, or the pattern of a search command.
*/
static int
cmd_char(c)
int c;
{
if (c == erase_char)
{
if (cmd_erase())
return (1);
} else if (c == kill_char)
{
/* {{ Could do this faster, but who cares? }} */
while (cmd_erase() == 0)
;
} else
{
/*
* Append the character to the string,
* if there is room in the buffer and on the screen.
*/
if (cp < &cmdbuf[sizeof(cmdbuf)-1] && cmd_col < sc_width-3)
{
*cp++ = c;
if (control_char(c))
{
putc('^');
cmd_col++;
c = carat_char(c);
}
putc(c);
cmd_col++;
} else
bell();
}
return (0);
}
/*
* Return the number currently in the command buffer.
*/
static int
cmd_int()
{
*cp = '\0';
cp = cmdbuf;
return (atoi(cmdbuf));
}
/*
* Move the cursor to lower left before executing a command.
* This looks nicer if the command takes a long time before
* updating the screen.
*/
static void
cmd_exec()
{
lower_left();
flush();
}
/*
* Display the appropriate prompt.
*/
static void
prompt()
{
register char *p;
if (first_cmd != NULL && *first_cmd != '\0')
/*
* No prompt necessary if commands are from first_cmd
* rather than from the user.
*/
return;
/*
* Select the proper prompt and display it.
*/
p = pr_string();
if (p == NULL)
putc(':');
else
{
so_enter();
puts(p);
so_exit();
}
}
/*
* Get command character.
* The character normally comes from the keyboard,
* but may come from the "first_cmd" string.
*/
static int
getcc()
{
if (first_cmd == NULL)
return (getc());
if (*first_cmd == '\0')
{
/*
* Reached end of first_cmd input.
*/
first_cmd = NULL;
if (cp > cmdbuf && position(TOP) == NULL_POSITION)
{
/*
* Command is incomplete, so try to complete it.
* There are only two cases:
* 1. We have "/string" but no newline. Add the \n.
* 2. We have a number but no command. Treat as #g.
* (This is all pretty hokey.)
*/
if (mcc != ':')
return ('\n');
else
return ('g');
}
return (getc());
}
return (*first_cmd++);
}
/*
* Main command processor.
* Accept and execute commands until a quit command, then return.
*/
public void
commands()
{
register int c;
register int n;
register int scroll = 10;
mcc = last_mcc = 0;
setjmp(main_loop);
for (;;)
{
/*
* Display prompt and accept a character.
*/
psignals(); /* See if any signals need processing */
if (quit_at_eof && hit_eof > 1)
/*
* After hitting end-of-file for the second time,
* automatically advance to the next file.
* If there are no more files, quit.
*/
next_file(1);
cmd_reset();
lower_left();
clear_eol();
prompt();
c = getcc();
again:
if (sigs)
continue;
if (mcc)
{
/*
* We are in a multi-character command.
* All chars until newline go into the command buffer.
* (Note that mcc == ':' is a special case that
* means a number is being entered.)
*/
if (mcc != ':' && (c == '\n' || c == '\r'))
{
/*
* Execute the command.
*/
*cp = '\0';
cmd_exec();
if (mcc == 'E')
{
char *p;
/*
* Ignore leading spaces
* in the filename.
*/
for (p = cmdbuf; *p == ' '; p++) ;
edit(p);
#if SHELL_ESCAPE
} else if (mcc == '!')
{
lsystem(cmdbuf);
error("!done");
first_cmd = "r"; /* Repaint */
#endif
} else
search(mcc, cmdbuf, n);
mcc = 0;
} else
{
if (mcc == ':' && (c < '0' || c > '9') &&
c != erase_char && c != kill_char)
{
/*
* This is not part of the number
* we were entering. Process
* it as a regular character.
*/
mcc = 0;
goto again;
}
/*
* Append the char to the command buffer.
*/
if (cmd_char(c))
{
/* Abort the multi-char command. */
mcc = 0;
continue;
}
c = getcc();
goto again;
}
} else switch (c)
{
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/*
* First digit of a number.
*/
mcc = ':';
start_mcc();
goto again;
case 'f':
case ' ':
case CONTROL('F'):
/*
* Forward one screen.
*/
n = cmd_int();
if (n <= 0)
n = sc_window;
forward(n, 1);
break;
case 'b':
case CONTROL('B'):
/*
* Backward one screen.
*/
n = cmd_int();
if (n <= 0)
n = sc_window;
backward(n, 1);
break;
case 'e':
case 'j':
case '\r':
case '\n':
case CONTROL('E'):
/*
* Forward N (default 1) line.
*/
n = cmd_int();
if (n <= 0)
n = 1;
forward(n, 0);
break;
case 'y':
case 'k':
case CONTROL('K'):
case CONTROL('Y'):
/*
* Backward N (default 1) line.
*/
n = cmd_int();
if (n <= 0)
n = 1;
backward(n, 0);
break;
case 'd':
case CONTROL('D'):
/*
* Forward N lines
* (default same as last 'd' or 'u' command).
*/
n = cmd_int();
if (n > 0)
scroll = n;
forward(scroll, 0);
break;
case 'u':
case CONTROL('U'):
/*
* Forward N lines
* (default same as last 'd' or 'u' command).
*/
n = cmd_int();
if (n > 0)
scroll = n;
backward(scroll, 0);
break;
case 'R':
/*
* Flush buffers, then repaint screen.
*/
ch_init(0);
/* Fall thru */
case 'r':
case CONTROL('R'):
case CONTROL('L'):
/*
* Repaint screen.
*/
repaint();
break;
case 'g':
/*
* Go to line N, default beginning of file.
*/
n = cmd_int();
if (n <= 0)
n = 1;
cmd_exec();
jump_back(n);
break;
case 'p':
case '%':
/*
* Go to a specified percentage into the file.
*/
n = cmd_int();
if (n < 0)
n = 0;
if (n > 100)
n = 100;
cmd_exec();
jump_percent(n);
break;
case 'G':
/*
* Go to line N, default end of file.
*/
n = cmd_int();
cmd_exec();
if (n <= 0)
jump_forw();
else
jump_back(n);
break;
case '=':
case CONTROL('G'):
/*
* Print file name, etc.
*/
error(eq_message());
break;
case 'V':
/*
* Print version number, without the "@(#)".
*/
error(version+4);
break;
case 'q':
/*
* Exit.
*/
return;
case '/':
case '?':
/*
* Search for a pattern.
* Accept chars of the pattern until \n.
*/
n = cmd_int();
if (n <= 0)
n = 1;
mcc = last_mcc = c;
start_mcc();
c = getcc();
goto again;
case 'n':
/*
* Repeat previous search.
*/
n = cmd_int();
if (n <= 0)
n = 1;
mcc = last_mcc;
start_mcc();
cmd_exec();
search(mcc, (char *)NULL, n);
mcc = 0;
break;
case 'h':
/*
* Help.
*/
help();
repaint();
break;
case 'E':
/*
* Edit a new file. Get the filename.
*/
cmd_reset();
mcc = 'E';
start_mcc();
puts("dit: "); /* This looks nicer */
cmd_col += 5;
c = getcc();
goto again;
#if SHELL_ESCAPE
case '!':
/*
* Shell escape.
*/
cmd_reset();
mcc = '!';
start_mcc();
c = getcc();
goto again;
#endif
#if EDITOR
case 'v':
if (ispipe)
{
error("Cannot edit standard input");
break;
}
sprintf(cmdbuf, "%s %s", editor, current_file);
lsystem(cmdbuf);
first_cmd = "R";
break;
#endif
case 'N':
/*
* Examine next file.
*/
n = cmd_int();
if (n <= 0)
n = 1;
next_file(n);
break;
case 'P':
/*
* Examine previous file.
*/
n = cmd_int();
if (n <= 0)
n = 1;
prev_file(n);
break;
case '-':
/*
* Toggle a flag setting.
*/
mcc = '-';
start_mcc();
c = getcc();
mcc = 0;
if (c == erase_char || c == kill_char)
break;
toggle_option(c);
break;
case 'm':
/*
* Set a mark.
*/
lower_left();
clear_eol();
puts("mark: ");
c = getcc();
if (c == erase_char || c == kill_char)
break;
setmark(c);
break;
case '\'':
/*
* Go to a mark.
*/
lower_left();
clear_eol();
puts("goto mark: ");
c = getcc();
if (c == erase_char || c == kill_char)
break;
gomark(c);
break;
default:
bell();
break;
}
}
}
SHAR_EOF
fi
if test -f 'less.l'
then
echo shar: "will not over-write existing file 'less.l'"
else
cat << \SHAR_EOF > 'less.l'
.TH LESS l
.SH NAME
less \- opposite of more
.SH SYNOPSIS
.B "less [-cdepstwmMqQuU] [-h\fIn\fB] [-b[fp]\fIn\fB] [-x\fIn\fB] [-[z]\fIn\fB] [+\fIcmd\fB] [\fIname\fB] ..."
.SH DESCRIPTION
.I Less
is a program similar to
.I more
(1), but which allows backwards movement
in the file as well as forward movement.
Also,
.I less
does not have to read the entire input file before starting,
so with large input files it starts up faster than text editors like
.I vi
(1).
.I Less
uses termcap, so it can run on a variety of terminals.
There is even limited support for hardcopy terminals.
(On a hardcopy terminal, lines which should be printed at the top
of the screen are prefixed with an up-arrow.)
.PP
Commands are based on both
.I more
and
.I vi.
Commands may be preceeded by a decimal number,
called N in the descriptions below.
The number is used by some commands, as indicated.
.SH COMMANDS
.IP h
Help: display a summary of these commands.
If you forget all the other commands, remember this one.
.PP
.IP SPACE
Scroll forward N lines, default one window (see option z below).
If N is more than the screen size, only one screenful is displayed.
.PP
.IP f
Same as SPACE.
.PP
.IP b
Scroll backward N lines, default one window (see option z below).
If N is more than the screen size, only one screenful is displayed.
.PP
.IP RETURN
Scroll forward N lines, default 1.
If N is more than the screen size, the entire N lines are displayed.
.PP
.IP e
Same as RETURN.
.PP
.IP j
Also the same as RETURN.
.PP
.IP y
Scroll backward N lines, default 1.
If N is more than the screen size, the entire N lines are displayed.
.IP k
Same as y.
.PP
.IP d
Scroll forward N lines, default 10.
If N is specified, it becomes the new default for all d and u commands.
.PP
.IP u
Scroll backward N lines, default 10.
If N is specified, it becomes the new default for all d and u commands.
.PP
.IP r
Repaint the screen.
.PP
.IP R
Repaint the screen, discarding any buffered input.
Useful if the file is changing while it is being viewed.
.PP
.IP g
Go to line N in the file, default 1 (beginning of file).
(Warning: this may be slow if N is large.)
.PP
.IP G
Go to line N in the file, default the end of the file.
(Warning: this may be slow if standard input,
rather than a file, is being read.)
.PP
.IP p
Go to a position N percent into the file.
N should be between 0 and 100.
(This is possible if standard input is being read,
but only if
.I less
has already read to the end of the file.
It is always fast, but not always useful.)
.PP
.IP %
Same as p.
.PP
.IP m
Followed by any lowercase letter, marks the current position with that letter.
.PP
.IP "'"
Followed by any lowercase letter, returns to the position which
was previously marked with that letter.
All marks are lost when a new file is examined.
.PP
.IP /pattern
Search forward in the file for the N-th occurence of the pattern.
N defaults to 1.
The pattern is a regular expression, as recognized by
.I ed.
The search starts at the second line displayed
(but see the -t option, which changes this).
.PP
.IP ?pattern
Search backward in the file for the N-th occurence of the pattern.
The search starts at the line immediately before the top line displayed.
.PP
.IP n
Repeat previous search, for N-th occurence of the last pattern.
.PP
.IP E [filename]
Examine a new file.
If the filename is missing, the "current" file (see the N and P commands
below) from the list of files in the command line is re-examined.
.PP
.IP N
Examine the next file (from the list of files given in the command line).
If a number N is specified (not to be confused with the command N),
the N-th next file is examined.
.PP
.IP P
Examine the previous file.
If a number N is specified, the N-th previous file is examined.
.PP
.IP =
Prints the name of the file being viewed
and the byte offset of the bottom line being displayed.
If possible, it also prints the length of the file
and the percent of the file above the last displayed line.
.PP
.IP \-
Followed by one of the command line option letters (see below),
this will toggle the setting of that option
and print a message describing the new setting.
.PP
.IP V
Prints the version number of
.I less
being run.
.PP
.IP q
Exits
.I less.
.PP
The following
two
commands may or may not be valid, depending on your particular installation.
.PP
.IP v
Invokes an editor to edit the current file being viewed.
The editor is taken from the environment variable EDITOR,
or defaults to "vi".
.PP
.IP "! shell-command"
Invokes a shell to run the shell-command given.
.PP
.SH OPTIONS
Command line options are described below.
Options are also taken from the environment variable "LESS".
(The environment variable is parsed before the command line,
so command line options override the LESS environment variable.
Options may be changed while
.I less
is running via the "\-" command.)
For example, if you like
more-style prompting, to avoid typing "less -m ..." each time
.I less
is invoked, you might tell
.I csh:
.sp
setenv LESS m
.sp
or if you use
.I sh:
.sp
LESS=m; export LESS
.IP -s
The -s flag causes
consecutive blank lines to be squeezed into a single blank line.
This is useful when viewing
.I nroff
output.
.IP -t
Normally, forward searches start just after
the top displayed line (that is, at the second displayed line).
Thus forward searches include the currently displayed screen.
The -t command line option causes forward searches to start
just after the bottom line displayed,
thus skipping the currently displayed screen.
.IP -m
Normally,
.I less
prompts with a colon.
The -m command line option causes
.I less
to prompt verbosely like
.I more,
printing the file name and percent into the file.
.IP -M
The -M command line option causes
.I less
to prompt even more verbosely than
.I more.
.IP -q
Normally, if an attempt is made to scroll past the end of the file
or before the beginning of the file, the terminal bell is rung to
indicate this fact.
The -q command line option tells
.I less
not to ring the bell at such times.
If the terminal has a "visual bell", it is used instead.
.IP -Q
Even if -q is given,
.I less
will ring the bell on certain other errors,
such as typing an invalid character.
The -Q command line option tells
.I less
to be quiet all the time; that is, never ring the terminal bell.
If the terminal has a "visual bell", it is used instead.
.IP -e
Normally the only way to exit less is via the "q" command.
The -e command line option tells less to automatically exit
the second time it reaches end-of-file.
.IP -u
If the -u command line option is given,
backspaces are treated as printable characters;
that is, they are sent to the terminal when they appear in the input.
.IP -U
If the -U command line option is given,
backspaces are printed as the two character sequence "^H".
If neither -u nor -U is given,
backspaces which appear adjacent to an underscore character
are treated specially:
the underlined text is displayed
using the terminal's hardware underlining capability.
.IP -w
Normally,
.I less
uses a tilde character to represent lines past the end of the file.
The -w option causes blank lines to be used instead.
.IP -d
Normally,
.I less
will complain if the terminal is dumb; that is, lacks some important capability,
such as the ability to clear the screen or scroll backwards.
The -d flag suppresses this complaint
(but does not otherwise change the behavior of the program on a dumb terminal).
.IP -p
Normally,
.I less
will repaint the screen by scrolling from the bottom of the screen.
If the -p flag is set, when
.I less
needs to change the entire display, it will clear the screen
and paint from the top line down.
.IP -h
Normally,
.I less
will scroll backwards when backwards movement is necessary.
The -h option specifies a maximum number of lines to scroll backwards.
If it is necessary to move backwards more than this many lines,
the screen is repainted in a forward direction.
(If the terminal does not have the ability to scroll
backwards, -h0 is implied.)
.IP -[z]\fIn\fR
When given a backwards or forwards window command,
.I less
will by default scroll backwards or forwards one screenful of lines.
The -[z]\fIn\fR option changes the default scrolling window size
to \fIn\fR lines.
If \fIn\fR is greater than the screen size, the scrolling window size
will be set to one screenful.
Note that the z is optional for compatibility with more.
.IP -x
The -x\fIn\fR command line option sets tab stops every \fIn\fR positions.
The default for \fIn\fR is 8.
.IP -b
The -b\fIn\fR command line option tells
.I less
to use a non-standard buffer size.
There are two standard (default) buffer sizes,
one is used when a file is being read and the other
when a pipe (standard input) is being read.
The current defaults are 5 buffers for files and 12 for pipes.
(Buffers are 1024 bytes.)
The number \fIn\fR specifies a different number of buffers to use.
The -b may be followed by "f", in which case only
the file default is changed, or by "p" in which case only the
pipe default is changed. Otherwise, both are changed.
.IP -c
Normally, when data is read by
.I less,
it is scanned to ensure that bit 7 (the high order bit) is turned off in
each byte read, and to ensure that there are no null (zero) bytes in
the data (null bytes are turned into "@" characters).
If the data is known to be "clean",
the -c command line option will tell
.I less
to skip this checking, causing an imperceptible speed improvement.
(However, if the data is not "clean", unpredicatable results may occur.)
.IP +
If a command line option begins with \fB+\fR,
the remainder of that option is taken to be an initial command to
.I less.
For example, +G tells
.I less
to start at the end of the file rather than the beginning,
and +/xyz tells it to start at the first occurence of "xyz" in the file.
As a special case, +<number> acts like +<number>g;
that is, it starts the display at the specified line number
(however, see the caveat under the "g" command above).
If the option starts with \fB++\fR, the initial command applies to
every file being viewed, not just the first one.
.SH BUGS
When used on standard input (rather than a file), you can move
backwards only a finite amount, corresponding to that portion
of the file which is still buffered.
SHAR_EOF
fi
if test -f 'pager_patch.c'
then
echo shar: "will not over-write existing file 'pager_patch.c'"
else
cat << \SHAR_EOF > 'pager_patch.c'
/*
* Special interface that checks for the environment variable PAGER. If
* present, the program specified is executed, otherwise OLD_PAGER_NEW_LOCATION
* (specified below). This program should replace /usr/ucb/more (or whatever
* your default pager is) and more should be moved to OLD_PAGER_NEW_LOCATION.
* This is essentially a fix for all the programs which *should* check for the
* environment variable PAGER, but don't - hopefully it will be obsoleted as
* old programs are update to check for PAGER so we can loose the overhead of
* reexecuting even this small program ...
*
* Casey Leedom (lll-crg.arpa!csustan!casey) - 5/29/86
*/
#ifndef OLD_PAGER_NEW_LOCATION
# define OLD_PAGER_NEW_LOCATION "/usr/ucb/More"
#endif !OLD_PAGER_NEW_LOCATION
void
main(argc, argv)
int argc;
char **argv;
{
char *pager, *getenv();
if (!(pager = getenv("PAGER")))
pager = OLD_PAGER_NEW_LOCATION;
(void) execv(pager, argv);
}
SHAR_EOF
fi
if test -f 'makefile.bsd41'
then
echo shar: "will not over-write existing file 'makefile.bsd41'"
else
cat << \SHAR_EOF > 'makefile.bsd41'
# Makefile for "less"
#
# Invoked as:
# make all
# or make install
# Plain "make" is equivalent to "make all".
#
# If you add or delete functions, remake funcs.h by doing:
# make newfuncs
# This depends on the coding convention of function headers looking like:
# " \t public <function-type> \n <function-name> ( ... ) "
#
# Also provided:
# make lint # Runs "lint" on all the sources.
# make clean # Removes "less" and the .o files.
# make clobber # Pretty much the same as make "clean".
#
# make pager_patch # makes PAGER environment variable
# make install_pager_patch # catcher and installs it (see below)
##########################################################################
# System-specific parameters
##########################################################################
# Define XENIX if running under XENIX 3.0
XENIX = 0
# VOID is 1 if your C compiler supports the "void" type,
# 0 if it does not.
VOID = 1
# off_t is the type which lseek() returns.
# It is also the type of lseek()'s second argument.
off_t = long
# TERMIO is 1 if your system has /usr/include/termio.h.
# This is normally the case for System 5.
# If TERMIO is 0 your system must have /usr/include/sgtty.h.
# This is normally the case for BSD.
TERMIO = 0
# SIGSETMASK is 1 if your system has the sigsetmask() call.
# This is normally the case only for BSD 4.2,
# not for BSD 4.1 or System 5.
SIGSETMASK = 0
##########################################################################
# Optional and semi-optional features
##########################################################################
# REGCMP is 1 if your system has the regcmp() function.
# This is normally the case for System 5.
# RECOMP is 1 if your system has the re_comp() function.
# This is normally the case for BSD.
# If neither is 1, pattern matching is supported, but without metacharacters.
REGCMP = 0
RECOMP = 1
# SHELL_ESCAPE is 1 if you wish to allow shell escapes.
# (This is possible only if your system supplies the system() function.)
SHELL_ESCAPE = 0
# EDITOR is 1 if you wish to allow editor invocation (the "v" command).
# (This is possible only if your system supplies the system() function.)
# EDIT_PGM is the name of the (default) editor to be invoked.
EDITOR = 0
EDIT_PGM = /usr/ucb/vi
# parameters to "make install_pager_patch". OLD_PAGER will be moved to
# OLD_PAGER_NEW_LOCATION and pager_patch (in this directory) will be installed
# as OLD_PAGER. This patch will allow you to set the environment variable
# PAGER to specify your personal pager preference (is this a security hole?)
OLD_PAGER = /usr/ucb/more
OLD_PAGER_NEW_LOCATION = /usr/ucb/More
# ONLY_RETURN is 1 if you want RETURN to be the only input which
# will continue past an error message.
# Otherwise, any key will continue past an error message.
ONLY_RETURN = 0
##########################################################################
# Compilation environment.
##########################################################################
# LIBS is the list of libraries needed.
LIBS = -ltermcap
# INSTALL_LESS is a list of the public versions of less.
# INSTALL_MAN is a list of the public versions of the manual page.
INSTALL_LESS = /usr/local/less
INSTALL_MAN = /usr/man/manl/less.l
# OPTIM is passed to the compiler and the loader.
# It is normally "-O" but may be, for example, "-g".
OPTIM = -O
##########################################################################
# Files
##########################################################################
SRC1 = main.c option.c prim.c
SRC2 = ch.c position.c input.c output.c screen.c \
prompt.c line.c signal.c help.c ttyin.c command.c version.c
SRC = $(SRC1) $(SRC2)
OBJ = main.o option.o prim.o ch.o position.o input.o output.o screen.o \
prompt.o line.o signal.o help.o ttyin.o command.o version.o
##########################################################################
# Rules
##########################################################################
DEFS = "-DTERMIO=$(TERMIO)" \
"-DSIGSETMASK=$(SIGSETMASK)" \
"-Doff_t=$(off_t)" "-DVOID=$(VOID)" \
"-DREGCMP=$(REGCMP)" "-DRECOMP=$(RECOMP)" \
"-DSHELL_ESCAPE=$(SHELL_ESCAPE)" \
"-DEDITOR=$(EDITOR)" "-DEDIT_PGM=\"$(EDIT_PGM)\"" \
"-DONLY_RETURN=$(ONLY_RETURN)" \
"-DXENIX=$(XENIX)" \
"-DOLD_PAGER_NEW_LOCATION=\"$(OLD_PAGER_NEW_LOCATION)\""
CFLAGS = $(OPTIM) $(DEFS)
all: less
less: $(OBJ)
cc $(OPTIM) -o less $(OBJ) $(LIBS)
install: install_man install_less
install_man: less.l
for f in $(INSTALL_MAN); do rm -f $$f; cp less.l $$f; done
touch install_man
install_less: less
for f in $(INSTALL_LESS); do rm -f $$f; cp less $$f; done
touch install_less
pager_patch: pager_patch.c
cc $(CFLAGS) -s -o pager_patch pager_patch.c
install_pager_patch: pager_patch
if [ -s $(OLD_PAGER) -a ! -s $(OLD_PAGER_NEW_LOCATION) ]; then \
mv $(OLD_PAGER) $(OLD_PAGER_NEW_LOCATION); \
cp pager_patch $(OLD_PAGER); \
fi
touch install_pager_patch
$(OBJ): less.h funcs.h
lint:
lint -hp $(DEFS) $(SRC)
newfuncs:
mv funcs.h funcs.h.OLD
awk -f mkfuncs.awk $(SRC) >funcs.h
clean:
rm -f $(OBJ) less pager_patch
clobber:
rm -f *.o less pager_patch install_less install_man install_pager_patch
shar:
shar -v INSTALLATION less.l makefile.* *.h *.awk $(SRC1) > less.shar.a
shar -v $(SRC2) pager_patch.c > less.shar.b
SHAR_EOF
fi
if test -f 'makefile.bsd42'
then
echo shar: "will not over-write existing file 'makefile.bsd42'"
else
cat << \SHAR_EOF > 'makefile.bsd42'
# Makefile for "less"
#
# Invoked as:
# make all
# or make install
# Plain "make" is equivalent to "make all".
#
# If you add or delete functions, remake funcs.h by doing:
# make newfuncs
# This depends on the coding convention of function headers looking like:
# " \t public <function-type> \n <function-name> ( ... ) "
#
# Also provided:
# make lint # Runs "lint" on all the sources.
# make clean # Removes "less" and the .o files.
# make clobber # Pretty much the same as make "clean".
#
# make pager_patch # makes PAGER environment variable
# make install_pager_patch # catcher and installs it (see below)
##########################################################################
# System-specific parameters
##########################################################################
# Define XENIX if running under XENIX 3.0
XENIX = 0
# VOID is 1 if your C compiler supports the "void" type,
# 0 if it does not.
VOID = 1
# off_t is the type which lseek() returns.
# It is also the type of lseek()'s second argument.
off_t = long
# TERMIO is 1 if your system has /usr/include/termio.h.
# This is normally the case for System 5.
# If TERMIO is 0 your system must have /usr/include/sgtty.h.
# This is normally the case for BSD.
TERMIO = 0
# SIGSETMASK is 1 if your system has the sigsetmask() call.
# This is normally the case only for BSD 4.2,
# not for BSD 4.1 or System 5.
SIGSETMASK = 1
##########################################################################
# Optional and semi-optional features
##########################################################################
# REGCMP is 1 if your system has the regcmp() function.
# This is normally the case for System 5.
# RECOMP is 1 if your system has the re_comp() function.
# This is normally the case for BSD.
# If neither is 1, pattern matching is supported, but without metacharacters.
REGCMP = 0
RECOMP = 1
# SHELL_ESCAPE is 1 if you wish to allow shell escapes.
# (This is possible only if your system supplies the system() function.)
SHELL_ESCAPE = 0
# EDITOR is 1 if you wish to allow editor invocation (the "v" command).
# (This is possible only if your system supplies the system() function.)
# EDIT_PGM is the name of the (default) editor to be invoked.
EDITOR = 0
EDIT_PGM = /usr/ucb/vi
# parameters to "make install_pager_patch". OLD_PAGER will be moved to
# OLD_PAGER_NEW_LOCATION and pager_patch (in this directory) will be installed
# as OLD_PAGER. This patch will allow you to set the environment variable
# PAGER to specify your personal pager preference (is this a security hole?)
OLD_PAGER = /usr/ucb/more
OLD_PAGER_NEW_LOCATION = /usr/ucb/More
# ONLY_RETURN is 1 if you want RETURN to be the only input which
# will continue past an error message.
# Otherwise, any key will continue past an error message.
ONLY_RETURN = 0
##########################################################################
# Compilation environment.
##########################################################################
# LIBS is the list of libraries needed.
LIBS = -ltermcap
# INSTALL_LESS is a list of the public versions of less.
# INSTALL_MAN is a list of the public versions of the manual page.
INSTALL_LESS = /usr/local/less
INSTALL_MAN = /usr/man/manl/less.l
# OPTIM is passed to the compiler and the loader.
# It is normally "-O" but may be, for example, "-g".
OPTIM = -O
##########################################################################
# Files
##########################################################################
SRC1 = main.c option.c prim.c
SRC2 = ch.c position.c input.c output.c screen.c \
prompt.c line.c signal.c help.c ttyin.c command.c version.c
SRC = $(SRC1) $(SRC2)
OBJ = main.o option.o prim.o ch.o position.o input.o output.o screen.o \
prompt.o line.o signal.o help.o ttyin.o command.o version.o
##########################################################################
# Rules
##########################################################################
DEFS = "-DTERMIO=$(TERMIO)" \
"-DSIGSETMASK=$(SIGSETMASK)" \
"-Doff_t=$(off_t)" "-DVOID=$(VOID)" \
"-DREGCMP=$(REGCMP)" "-DRECOMP=$(RECOMP)" \
"-DSHELL_ESCAPE=$(SHELL_ESCAPE)" \
"-DEDITOR=$(EDITOR)" "-DEDIT_PGM=\"$(EDIT_PGM)\"" \
"-DONLY_RETURN=$(ONLY_RETURN)" \
"-DXENIX=$(XENIX)" \
"-DOLD_PAGER_NEW_LOCATION=\"$(OLD_PAGER_NEW_LOCATION)\""
CFLAGS = $(OPTIM) $(DEFS)
all: less
less: $(OBJ)
cc $(OPTIM) -o less $(OBJ) $(LIBS)
install: install_man install_less
install_man: less.l
for f in $(INSTALL_MAN); do rm -f $$f; cp less.l $$f; done
touch install_man
install_less: less
for f in $(INSTALL_LESS); do rm -f $$f; cp less $$f; done
touch install_less
pager_patch: pager_patch.c
cc $(CFLAGS) -s -o pager_patch pager_patch.c
install_pager_patch: pager_patch
if [ -s $(OLD_PAGER) -a ! -s $(OLD_PAGER_NEW_LOCATION) ]; then \
mv $(OLD_PAGER) $(OLD_PAGER_NEW_LOCATION); \
cp pager_patch $(OLD_PAGER); \
fi
touch install_pager_patch
$(OBJ): less.h funcs.h
lint:
lint -hp $(DEFS) $(SRC)
newfuncs:
mv funcs.h funcs.h.OLD
awk -f mkfuncs.awk $(SRC) >funcs.h
clean:
rm -f $(OBJ) less pager_patch
clobber:
rm -f *.o less pager_patch install_less install_man install_pager_patch
shar:
shar -v INSTALLATION less.l makefile.* *.h *.awk $(SRC1) > less.shar.a
shar -v $(SRC2) pager_patch.c > less.shar.b
SHAR_EOF
fi
if test -f 'makefile.sys5'
then
echo shar: "will not over-write existing file 'makefile.sys5'"
else
cat << \SHAR_EOF > 'makefile.sys5'
# Makefile for "less"
#
# Invoked as:
# make all
# or make install
# Plain "make" is equivalent to "make all".
#
# If you add or delete functions, remake funcs.h by doing:
# make newfuncs
# This depends on the coding convention of function headers looking like:
# " \t public <function-type> \n <function-name> ( ... ) "
#
# Also provided:
# make lint # Runs "lint" on all the sources.
# make clean # Removes "less" and the .o files.
# make clobber # Pretty much the same as make "clean".
#
# make pager_patch # makes PAGER environment variable
# make install_pager_patch # catcher and installs it (see below)
##########################################################################
# System-specific parameters
##########################################################################
# Define XENIX if running under XENIX 3.0
XENIX = 0
# VOID is 1 if your C compiler supports the "void" type,
# 0 if it does not.
VOID = 1
# off_t is the type which lseek() returns.
# It is also the type of lseek()'s second argument.
off_t = long
# TERMIO is 1 if your system has /usr/include/termio.h.
# This is normally the case for System 5.
# If TERMIO is 0 your system must have /usr/include/sgtty.h.
# This is normally the case for BSD.
TERMIO = 1
# SIGSETMASK is 1 if your system has the sigsetmask() call.
# This is normally the case only for BSD 4.2,
# not for BSD 4.1 or System 5.
SIGSETMASK = 0
##########################################################################
# Optional and semi-optional features
##########################################################################
# REGCMP is 1 if your system has the regcmp() function.
# This is normally the case for System 5.
# RECOMP is 1 if your system has the re_comp() function.
# This is normally the case for BSD.
# If neither is 1, pattern matching is supported, but without metacharacters.
REGCMP = 1
RECOMP = 0
# SHELL_ESCAPE is 1 if you wish to allow shell escapes.
# (This is possible only if your system supplies the system() function.)
SHELL_ESCAPE = 0
# EDITOR is 1 if you wish to allow editor invocation (the "v" command).
# (This is possible only if your system supplies the system() function.)
# EDIT_PGM is the name of the (default) editor to be invoked.
EDITOR = 0
EDIT_PGM = /usr/ucb/vi
# parameters to "make install_pager_patch". OLD_PAGER will be moved to
# OLD_PAGER_NEW_LOCATION and pager_patch (in this directory) will be installed
# as OLD_PAGER. This patch will allow you to set the environment variable
# PAGER to specify your personal pager preference (is this a security hole?)
OLD_PAGER = /usr/ucb/more
OLD_PAGER_NEW_LOCATION = /usr/ucb/More
# ONLY_RETURN is 1 if you want RETURN to be the only input which
# will continue past an error message.
# Otherwise, any key will continue past an error message.
ONLY_RETURN = 0
##########################################################################
# Compilation environment.
##########################################################################
# LIBS is the list of libraries needed.
LIBS = -lcurses -lPW
# INSTALL_LESS is a list of the public versions of less.
# INSTALL_MAN is a list of the public versions of the manual page.
INSTALL_LESS = /usr/lbin/less
INSTALL_MAN = /usr/man/manl/less.l
# OPTIM is passed to the compiler and the loader.
# It is normally "-O" but may be, for example, "-g".
OPTIM = -O
##########################################################################
# Files
##########################################################################
SRC1 = main.c option.c prim.c
SRC2 = ch.c position.c input.c output.c screen.c \
prompt.c line.c signal.c help.c ttyin.c command.c version.c
SRC = $(SRC1) $(SRC2)
OBJ = main.o option.o prim.o ch.o position.o input.o output.o screen.o \
prompt.o line.o signal.o help.o ttyin.o command.o version.o
##########################################################################
# Rules
##########################################################################
DEFS = "-DTERMIO=$(TERMIO)" \
"-DSIGSETMASK=$(SIGSETMASK)" \
"-Doff_t=$(off_t)" "-DVOID=$(VOID)" \
"-DREGCMP=$(REGCMP)" "-DRECOMP=$(RECOMP)" \
"-DSHELL_ESCAPE=$(SHELL_ESCAPE)" \
"-DEDITOR=$(EDITOR)" "-DEDIT_PGM=\"$(EDIT_PGM)\"" \
"-DONLY_RETURN=$(ONLY_RETURN)" \
"-DXENIX=$(XENIX)" \
"-DOLD_PAGER_NEW_LOCATION=\"$(OLD_PAGER_NEW_LOCATION)\""
CFLAGS = $(OPTIM) $(DEFS)
all: less
less: $(OBJ)
cc $(OPTIM) -o less $(OBJ) $(LIBS)
install: install_man install_less
install_man: less.l
for f in $(INSTALL_MAN); do rm -f $$f; cp less.l $$f; done
touch install_man
install_less: less
for f in $(INSTALL_LESS); do rm -f $$f; cp less $$f; done
touch install_less
pager_patch: pager_patch.c
cc $(CFLAGS) -s -o pager_patch pager_patch.c
install_pager_patch: pager_patch
if [ -s $(OLD_PAGER) -a ! -s $(OLD_PAGER_NEW_LOCATION) ]; then \
mv $(OLD_PAGER) $(OLD_PAGER_NEW_LOCATION); \
cp pager_patch $(OLD_PAGER); \
fi
touch install_pager_patch
$(OBJ): less.h funcs.h
lint:
lint -hp $(DEFS) $(SRC)
newfuncs:
mv funcs.h funcs.h.OLD
awk -f mkfuncs.awk $(SRC) >funcs.h
clean:
rm -f $(OBJ) less pager_patch
clobber:
rm -f *.o less pager_patch install_less install_man install_pager_patch
shar:
shar -v INSTALLATION less.l makefile.* *.h *.awk $(SRC1) > less.shar.a
shar -v $(SRC2) pager_patch.c > less.shar.b
SHAR_EOF
fi
if test -f 'makefile.xen'
then
echo shar: "will not over-write existing file 'makefile.xen'"
else
cat << \SHAR_EOF > 'makefile.xen'
# Makefile for "less"
#
# Invoked as:
# make all
# or make install
# Plain "make" is equivalent to "make all".
#
# If you add or delete functions, remake funcs.h by doing:
# make newfuncs
# This depends on the coding convention of function headers looking like:
# " \t public <function-type> \n <function-name> ( ... ) "
#
# Also provided:
# make lint # Runs "lint" on all the sources.
# make clean # Removes "less" and the .o files.
# make clobber # Pretty much the same as make "clean".
#
# make pager_patch # makes PAGER environment variable
# make install_pager_patch # catcher and installs it (see below)
##########################################################################
# System-specific parameters
##########################################################################
# Define XENIX if running under XENIX 3.0
XENIX = 1
# VOID is 1 if your C compiler supports the "void" type,
# 0 if it does not.
VOID = 1
# off_t is the type which lseek() returns.
# It is also the type of lseek()'s second argument.
off_t = long
# TERMIO is 1 if your system has /usr/include/termio.h.
# This is normally the case for System 5.
# If TERMIO is 0 your system must have /usr/include/sgtty.h.
# This is normally the case for BSD.
TERMIO = 1
# SIGSETMASK is 1 if your system has the sigsetmask() call.
# This is normally the case only for BSD 4.2,
# not for BSD 4.1 or System 5.
SIGSETMASK = 0
##########################################################################
# Optional and semi-optional features
##########################################################################
# REGCMP is 1 if your system has the regcmp() function.
# This is normally the case for System 5.
# RECOMP is 1 if your system has the re_comp() function.
# This is normally the case for BSD.
# If neither is 1, pattern matching is supported, but without metacharacters.
REGCMP = 1
RECOMP = 0
# SHELL_ESCAPE is 1 if you wish to allow shell escapes.
# (This is possible only if your system supplies the system() function.)
SHELL_ESCAPE = 0
# EDITOR is 1 if you wish to allow editor invocation (the "v" command).
# (This is possible only if your system supplies the system() function.)
# EDIT_PGM is the name of the (default) editor to be invoked.
EDITOR = 0
EDIT_PGM = /usr/ucb/vi
# parameters to "make install_pager_patch". OLD_PAGER will be moved to
# OLD_PAGER_NEW_LOCATION and pager_patch (in this directory) will be installed
# as OLD_PAGER. This patch will allow you to set the environment variable
# PAGER to specify your personal pager preference (is this a security hole?)
OLD_PAGER = /usr/ucb/more
OLD_PAGER_NEW_LOCATION = /usr/ucb/More
# ONLY_RETURN is 1 if you want RETURN to be the only input which
# will continue past an error message.
# Otherwise, any key will continue past an error message.
ONLY_RETURN = 0
##########################################################################
# Compilation environment.
##########################################################################
# LIBS is the list of libraries needed.
LIBS = -lcurses -ltermlib
# INSTALL_LESS is a list of the public versions of less.
# INSTALL_MAN is a list of the public versions of the manual page.
INSTALL_LESS = /usr/lbin/less
INSTALL_MAN = /usr/man/manl/less.l
# OPTIM is passed to the compiler and the loader.
# It is normally "-O" but may be, for example, "-g".
OPTIM = -O
##########################################################################
# Files
##########################################################################
SRC1 = main.c option.c prim.c
SRC2 = ch.c position.c input.c output.c screen.c \
prompt.c line.c signal.c help.c ttyin.c command.c version.c
SRC = $(SRC1) $(SRC2)
OBJ = main.o option.o prim.o ch.o position.o input.o output.o screen.o \
prompt.o line.o signal.o help.o ttyin.o command.o version.o
##########################################################################
# Rules
##########################################################################
DEFS = "-DTERMIO=$(TERMIO)" \
"-DSIGSETMASK=$(SIGSETMASK)" \
"-Doff_t=$(off_t)" "-DVOID=$(VOID)" \
"-DREGCMP=$(REGCMP)" "-DRECOMP=$(RECOMP)" \
"-DSHELL_ESCAPE=$(SHELL_ESCAPE)" \
"-DEDITOR=$(EDITOR)" "-DEDIT_PGM=\"$(EDIT_PGM)\"" \
"-DONLY_RETURN=$(ONLY_RETURN)" \
"-DXENIX=$(XENIX)" \
"-DOLD_PAGER_NEW_LOCATION=\"$(OLD_PAGER_NEW_LOCATION)\""
CFLAGS = $(OPTIM) $(DEFS)
all: less
less: $(OBJ)
cc $(OPTIM) -o less $(OBJ) $(LIBS)
install: install_man install_less
install_man: less.l
for f in $(INSTALL_MAN); do rm -f $$f; cp less.l $$f; done
touch install_man
install_less: less
for f in $(INSTALL_LESS); do rm -f $$f; cp less $$f; done
touch install_less
pager_patch: pager_patch.c
cc $(CFLAGS) -s -o pager_patch pager_patch.c
install_pager_patch: pager_patch
if test -s $(OLD_PAGER) -a ! -s $(OLD_PAGER_NEW_LOCATION) ; then \
mv $(OLD_PAGER) $(OLD_PAGER_NEW_LOCATION); \
cp pager_patch $(OLD_PAGER); \
fi
touch install_pager_patch
$(OBJ): less.h funcs.h
lint:
lint -hp $(DEFS) $(SRC)
newfuncs:
mv funcs.h funcs.h.OLD
awk -f mkfuncs.awk $(SRC) >funcs.h
clean:
rm -f $(OBJ) less pager_patch
clobber:
rm -f *.o less pager_patch install_less install_man install_pager_patch
shar:
shar -v INSTALLATION less.l makefile.* *.h *.awk $(SRC1) > less.shar.a
shar -v $(SRC2) pager_patch.c > less.shar.b
SHAR_EOF
fi
exit 0
# End of shell archive