jmturn@cca-unix.ARPA (10/02/85)
A lifelong ambition of mine has been to have csh give me the current
time as my prompt (Ok, current time, and history number, to get greedy).
Would this involve source modification of csh? Or can I massage it?
Save Your Vertical Blanking Intervals
for Big Cash Prizes!
James Turner
(The Ringworld Engineer)
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---------------------------------------------------bill@ur-cvsvax.UUCP (Bill Vaughn) (10/04/85)
> A lifelong ambition of mine has been to have csh give me the current > time as my prompt (Ok, current time, and history number, to get greedy). > > Would this involve source modification of csh? Or can I massage it? > > James Turner > (The Ringworld Engineer) > If one has the source code one might as well do it there. Here are some diffs for sh.c and sh.dir.c which will give you the time and/or current directory in your prompt (and of course the event number). I was originally doing this with very cumbersome aliases but I decided that if the '\!' has special meaning in the prompt why not other characters as well. It works like a charm. In fact, I had only added '@' to serve as a code for 'pwd'. It took me only a few minutes to install a change to display the time (code = '&'). Thanks for the idea. You really only have to change /usr/src/csh/sh.c and remake to install these changes. However, given that my original intention concerned putting the 'pwd' in the prompt, I needed to make some changes in /usr/src/csh/sh.dir.c to eliminate some redundancies. These changes supress the printing of the 'pwd' after the 'pushd' or 'popd' commands. The 'dirs' command can do that if you really want it. I use aliases. I also changed the output of the dirs command so that using 'pd +n' is easier. The fix posted by Chris Berten (pixutl!chris) almost a year ago to this day concerning the correct display of the 'pwd' for directories thru symbolic links is in there too; i.e. if, say, /usr/sys@->/sys then a 'cd /usr/sys ; pwd' displays /sys and NOT /usr/sys) The following diffs are against the original distribution code with those diffs irrelevant to present purposes deleted. Hence your line numbers may vary. I've also included some aliases I find useful in conjunction with these changes. Enjoy! *** orgs/sh.c Thu Oct 3 14:45:10 1985 --- sh.c Thu Oct 3 22:46:50 1985 *************** *** 2,5 #include "sh.h" #include <sys/ioctl.h> /* --- 4,8 ----- #include "sh.h" + #include "sh.dir.h" #include <sys/ioctl.h> /* *************** *** 18,21 char HIST = '!'; char HISTSUB = '^'; bool nofile; bool reenter; --- 26,32 ----- char HIST = '!'; char HISTSUB = '^'; + char CWD = '@'; + char BKSL = '\\'; + char TME = '&'; bool nofile; bool reenter; *************** *** 739,750 if (fseekp == feobp) if (!whyles) ! for (cp = value("prompt"); *cp; cp++) ! if (*cp == HIST) ! printf("%d", eventno + 1); ! else { ! if (*cp == '\\' && cp[1] == HIST) ! cp++; ! putchar(*cp | QUOTE); ! } else /* --- 754,758 ----- if (fseekp == feobp) if (!whyles) ! doprompt(); else /* *************** *** 841,844 } dosource(t) register char **t; --- 849,875 ----- } + doprompt() + { + char *cp; + + for (cp = value("prompt"); *cp; cp++) { + if (*cp == HIST) + printf("%d",eventno+1); + else if (*cp == CWD) + printf("%s",dcwd->di_name); + else if (*cp == TME) { + long l = (long)time(0); + struct tm *t = (struct tm *)localtime(&l); + printf("%02d:%02d",t->tm_hour,t->tm_min); + } + else { + char c = *(cp + 1); + if (*cp == BKSL && (c == HIST || c == CWD || c == TME)) + cp++; + putchar(*cp | QUOTE); + } + } + } + dosource(t) register char **t; *** orgs/sh.dir.c Wed Mar 27 13:27:00 1985 --- sh.dir.c Thu Oct 3 16:02:06 1985 *************** *** 14,17 static char *fakev[] = { "dirs", NOSTR }; /* * dinit - initialize current working directory --- 16,22 ----- static char *fakev[] = { "dirs", NOSTR }; + #define PRENABLE 0 /* change this back to 1 for old behavior */ + #define PRDISABLE 0 + /* * dinit - initialize current working directory *************** *** 38,42 dhead.di_next = dhead.di_prev = dp; dp->di_next = dp->di_prev = &dhead; ! printd = 0; dnewcwd(dp); } --- 43,47 ----- dhead.di_next = dhead.di_prev = dp; dp->di_next = dp->di_prev = &dhead; ! printd = PRDISABLE; dnewcwd(dp); } *************** *** 51,54 bool lflag; char *hp = value("home"); if (*hp == '\0') --- 56,60 ----- bool lflag; char *hp = value("home"); + register i; if (*hp == '\0') *************** *** 62,65 lflag = 0; dp = dcwd; do { if (dp == &dhead) --- 68,72 ----- lflag = 0; dp = dcwd; + i = 0; do { if (dp == &dhead) *************** *** 65,69 if (dp == &dhead) continue; ! if (!lflag && hp != NOSTR) { dtildepr(hp, dp->di_name); } else --- 72,77 ----- if (dp == &dhead) continue; ! printf("%d:",i++); /* This helps with pd +n commands */ ! if (!lflag && hp != NOSTR) dtildepr(hp, dp->di_name); else *************** *** 67,71 if (!lflag && hp != NOSTR) { dtildepr(hp, dp->di_name); ! } else printf("%s", dp->di_name); printf(" "); --- 75,79 ----- if (!lflag && hp != NOSTR) dtildepr(hp, dp->di_name); ! else printf("%s", dp->di_name); printf("\n"); *************** *** 69,73 } else printf("%s", dp->di_name); ! printf(" "); } while ((dp = dp->di_prev) != dcwd); printf("\n"); --- 77,81 ----- else printf("%s", dp->di_name); ! printf("\n"); } while ((dp = dp->di_prev) != dcwd); } *************** *** 71,75 printf(" "); } while ((dp = dp->di_prev) != dcwd); - printf("\n"); } --- 79,82 ----- printf("\n"); } while ((dp = dp->di_prev) != dcwd); } *************** *** 93,97 register struct directory *dp; ! printd = 0; if (*++v == NOSTR) { if ((cp = value("home")) == NOSTR || *cp == 0) --- 100,104 ----- register struct directory *dp; ! printd = PRDISABLE; if (*++v == NOSTR) { if ((cp = value("home")) == NOSTR || *cp == 0) *************** *** 101,105 cp = savestr(cp); } else if ((dp = dfind(*v)) != 0) { ! printd = 1; if (chdir(dp->di_name) < 0) Perror(dp->di_name); --- 108,112 ----- cp = savestr(cp); } else if ((dp = dfind(*v)) != 0) { ! printd = PRENABLE; if (chdir(dp->di_name) < 0) Perror(dp->di_name); *************** *** 130,133 register char **cdp; struct varent *c; cp = globone(cp); --- 137,141 ----- register char **cdp; struct varent *c; + char *realdname(); cp = globone(cp); *************** *** 143,147 strcat(buf, cp); if (chdir(buf) >= 0) { ! printd = 1; xfree(cp); cp = savestr(buf); --- 151,155 ----- strcat(buf, cp); if (chdir(buf) >= 0) { ! printd = PRENABLE; xfree(cp); cp = savestr(buf); *************** *** 157,161 xfree(cp); cp = savestr(dp); ! printd = 1; goto gotcha; } --- 165,169 ----- xfree(cp); cp = savestr(dp); ! printd = PRENABLE; goto gotcha; } *************** *** 173,176 cp = dp; } dcanon(cp); return (cp); --- 181,185 ----- cp = dp; } + cp = realdname(cp); dcanon(cp); return (cp); *************** *** 187,191 register struct directory *dp; ! printd = 1; if (*++v == NOSTR) { if ((dp = dcwd->di_prev) == &dhead) --- 196,200 ----- register struct directory *dp; ! printd = PRENABLE; if (*++v == NOSTR) { if ((dp = dcwd->di_prev) == &dhead) *************** *** 257,261 register struct directory *dp, *p; ! printd = 1; if (*++v == NOSTR) dp = dcwd; --- 266,270 ----- register struct directory *dp, *p; ! printd = PRENABLE; if (*++v == NOSTR) dp = dcwd; *************** *** 274,279 if (dp == dcwd) dnewcwd(p); - else - dodirs(fakev); dfree(dp); } --- 283,286 ----- if (dp == dcwd) dnewcwd(p); dfree(dp); } *************** *** 357,359 if (printd) dodirs(fakev); } --- 364,379 ----- if (printd) dodirs(fakev); + } + + char *realdname(d) + char *d; + { + struct stat st; + char *getwd(); + char path[BUFSIZ]; + + lstat(d, &st); + if((st.st_mode & S_IFMT) != S_IFLNK) + return(d); + return(savestr(getwd(path))); } ********************* Some useful aliases: alias d dirs alias pd pushd alias pp popd alias cd 'pushd \!* ; prune' alias pdd 'pushd ; dirs' alias ppd 'popd ; dirs' alias cdd 'pushd \!* ; prune ; dirs' # # The prune alias keeps the directory stack a constant size # alias prune 'set zqk = `dirs` ; @ zqk = $#zqk - 1 ; if($zqk \!= 0) popd +$zqk ; unset zqk' _________________________________ \ Bill Vaughn / \ Center for Visual Science / / University of Rochester \ /seismo!rochester!ur-cvsvax!bill\ / ur-cvsvax!bill@rochester.arpa \ -----------------------------------
olson@fortune.UUCP (Dave Olson) (10/07/85)
Getting the time in the csh prompt means modification to the source.
The mods are relatively minor, but are too big to patch in.
The more general way would be to have the prompt routine (I forget the
name offhand) do back quote interpretation. I took the easier
route, and modified the routine to replace occurrences of $T in
$prompt, with the time in the form HH:MM. If you or others would
like the mod's I can mail them.
Dave Olson, Fortune Systems
UUCP: {ihnp4,ucbvax!dual}!fortune!olson
ARPA: dual!fortune!olson@BERKELEYavolio@decuac.UUCP (Frederick M. Avolio) (10/10/85)
In article <229@ur-cvsvax.UUCP>, bill@ur-cvsvax.UUCP (Bill Vaughn) writes: > > A lifelong ambition of mine has been to have csh give me the current > > time as my prompt (Ok, current time, and history number, to get greedy). > > > If one has the source code one might as well do it there. > .... I was originally doing this with very cumbersome aliases > ... It works like a charm. In fact, I had only > added '@' to serve as a code for 'pwd'. I do not mean to belittle the code changes made by Bill, as they are very nice. I also realize that the original poster wanted the *time* in the prompt and the only way to do this so that the current time always shows up is in the source code. But, if one only wants the current directory as part of the csh prompt, I'd use the following (which are by no means cumbersome aliases). alias cd 'cd !* ; set prompt="[$cwd]: "' alias popd 'popd ; set prompt="[$cwd]: "' alias pushd 'pushd !* ; set prompt="[$cwd]: "'
avolio@decuac.UUCP (Frederick M. Avolio) (10/10/85)
In article <229@ur-cvsvax.UUCP>, bill@ur-cvsvax.UUCP (Bill Vaughn) writes: > > A lifelong ambition of mine has been to have csh give me the current > > time as my prompt (Ok, current time, and history number, to get greedy). > > > If one has the source code one might as well do it there. > .... I was originally doing this with very cumbersome aliases > ... It works like a charm. In fact, I had only > added '@' to serve as a code for 'pwd'. I do not mean to belittle the code changes made by Bill, as they are very nice. I also realize that the original poster wanted the *time* in the prompt and the only way to do this so that the current time always shows up is to change the source code. But many do not have sources, and if one only wants the current directory as part of the csh prompt, I'd use the following (which are by no means cumbersome aliases). alias cd 'cd \!* ; set prompt="[$cwd]: "' alias pushd 'pushd \!* ; set prompt="[$cwd]: "' alias popd 'popd ; set prompt="[$cwd]: "'