rsalz@uunet.uu.net (Rich Salz) (10/16/89)
Submitted-by: Chip Salzenberg <chip@ateng.com>
Posting-number: Volume 20, Issue 25
Archive-name: deliver2.0/part03
#! /bin/sh
# This is a shell archive. Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file". To overwrite existing
# files, type "sh file -c". You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g.. If this archive is complete, you
# will see the following message at the end:
# "End of shell archive."
# Contents: debug.c dest.c dfile.c lock.c main.c
# Wrapped by network@ateng on Fri Jun 9 13:21:01 1989
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'debug.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'debug.c'\"
else
echo shar: Extracting \"'debug.c'\" \(1063 characters\)
sed "s/^X//" >'debug.c' <<'END_OF_FILE'
X/* $Header: debug.c,v 2.1 89/06/09 12:25:17 network Exp $
X *
X * Debugging output.
X *
X * $Log: debug.c,v $
X * Revision 2.1 89/06/09 12:25:17 network
X * Update RCS revisions.
X *
X * Revision 1.4 89/06/09 12:23:42 network
X * Baseline for 2.0 release.
X *
X */
X
X#include "deliver.h"
X
X/*----------------------------------------------------------------------
X * Print out a complete dump of all destinations
X */
X
Xdumpdests(when)
Xchar *when;
X{
X DEST *d;
X
X message("Destinations %s:\n", when);
X for (d = first_dest(); d; d = next_dest(d))
X {
X message("\t%s", d->d_name);
X
X switch (d->d_class)
X {
X case CL_USER:
X /* it's understood */
X break;
X case CL_MBOX:
X message(", mailbox='%s'", d->d_mailbox);
X break;
X case CL_UUCP:
X message(" (UUCP)");
X break;
X }
X message("; ");
X switch (d->d_state)
X {
X case ST_WORKING:
X message("Working");
X break;
X case ST_HOLD:
X message("Hold");
X break;
X case ST_DONE:
X message("Done");
X break;
X case ST_ERROR:
X message("Error (%s)", derrmsg(d->d_error));
X break;
X }
X message("\n");
X }
X}
END_OF_FILE
if test 1063 -ne `wc -c <'debug.c'`; then
echo shar: \"'debug.c'\" unpacked with wrong size!
fi
# end of 'debug.c'
fi
if test -f 'dest.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'dest.c'\"
else
echo shar: Extracting \"'dest.c'\" \(2938 characters\)
sed "s/^X//" >'dest.c' <<'END_OF_FILE'
X/* $Header: dest.c,v 2.1 89/06/09 12:25:22 network Exp $
X *
X * Operations on the list of mail destinations.
X *
X * $Log: dest.c,v $
X * Revision 2.1 89/06/09 12:25:22 network
X * Update RCS revisions.
X *
X * Revision 1.5 89/06/09 12:23:45 network
X * Baseline for 2.0 release.
X *
X */
X
X#include "deliver.h"
X
X/*
X * Local data.
X */
X
Xstatic DEST deadhead = { &deadhead, &deadhead };
X#define HEADPTR (&deadhead)
X
X/*----------------------------------------------------------------------
X * Add a new destination to the list (unless it already exists).
X * Return pointer to DEST.
X */
X
XDEST *
Xdest(name, mailbox)
Xchar *name;
Xchar *mailbox;
X{
X DEST *d;
X DCLASS class;
X
X if (strchr(name, '!'))
X class = CL_UUCP;
X else if (mailbox)
X class = CL_MBOX;
X else
X class = CL_USER;
X
X for (d = HEADPTR->d_next; d != HEADPTR; d = d->d_next)
X {
X if (d->d_class != class)
X continue;
X
X if (strcmp(d->d_name, name) != 0)
X continue;
X
X /*
X * If this destination has a named mailbox, then
X * test it for equality as well.
X */
X
X if (class == CL_MBOX
X && strcmp(d->d_mailbox, mailbox) != 0)
X continue;
X
X /*
X * Like, gnarly, dude! It's already in the chain!
X */
X
X return d;
X }
X
X /*
X * The given dest isn't in the list, so we have to add it.
X */
X
X d = (DEST *) zalloc(sizeof(DEST));
X d->d_class = class;
X d->d_state = ST_WORKING;
X d->d_name = copystr(name);
X if (class == CL_MBOX)
X d->d_mailbox = copystr(mailbox);
X
X /*
X * Check address for validity.
X */
X
X if (!valid_address(name))
X dest_err(d, E_IVADDR);
X else if (class != CL_UUCP && name_context(name) == NULL)
X dest_err(d, E_NSUSER);
X
X /*
X * Put new address at the end of of the chain.
X * (This is important! Other code depends on it.)
X */
X
X d->d_prev = HEADPTR->d_prev;
X d->d_next = HEADPTR;
X d->d_prev->d_next = d;
X d->d_next->d_prev = d;
X
X return d;
X}
X
X/*----------------------------------------------------------------------
X * Return pointer to first DEST in the list.
X */
X
XDEST *
Xfirst_dest()
X{
X if (HEADPTR->d_next != HEADPTR)
X return HEADPTR->d_next;
X
X return NULL;
X}
X
X/*----------------------------------------------------------------------
X * Return pointer to next DEST in the list, or NULL.
X */
X
XDEST *
Xnext_dest(d)
XDEST *d;
X{
X if (d && (d = d->d_next) != HEADPTR)
X return d;
X
X return NULL;
X}
X
X/*----------------------------------------------------------------------
X * Return an error message given a DERROR.
X */
X
Xchar *
Xderrmsg(e)
XDERROR e;
X{
X static char unknown_buf[40];
X
X switch (e)
X {
X case E_IVADDR:
X return "Invalid address string";
X case E_NSUSER:
X return "No such user";
X case E_NSHOST:
X return "No such host (UUCP addresses)";
X case E_CTPERM:
X return "No permissions for that context";
X case E_CTLOST:
X return "Context lost (should never happen)";
X case E_MBOX:
X return "Can't write to mailbox";
X case E_UUX:
X return "Can't pipe to uux";
X }
X
X (void) sprintf(unknown_buf, "Unknown error %d", e);
X return unknown_buf;
X}
END_OF_FILE
if test 2938 -ne `wc -c <'dest.c'`; then
echo shar: \"'dest.c'\" unpacked with wrong size!
fi
# end of 'dest.c'
fi
if test -f 'dfile.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'dfile.c'\"
else
echo shar: Extracting \"'dfile.c'\" \(8068 characters\)
sed "s/^X//" >'dfile.c' <<'END_OF_FILE'
X/* $Header: dfile.c,v 2.1 89/06/09 12:25:24 network Exp $
X *
X * Filter destination(s) through delivery file(s).
X *
X * $Log: dfile.c,v $
X * Revision 2.1 89/06/09 12:25:24 network
X * Update RCS revisions.
X *
X * Revision 1.10 89/06/09 12:23:49 network
X * Baseline for 2.0 release.
X *
X */
X
X#include "deliver.h"
X#include <sys/stat.h>
X
X/*----------------------------------------------------------------------
X * Filter all valid destinations through the global delivery file.
X */
X
Xsys_dfile(dac, dav)
Xint dac;
Xchar **dav;
X{
X char **fav;
X int fac, a;
X struct stat st;
X
X /*
X * If there is no global delivery file, forget it.
X */
X
X if (stat(sys_deliver, &st) == -1)
X {
X if (verbose)
X message("no system delivery file\n");
X return -1;
X }
X
X /*
X * If we've been asked not to run delivery files, forget it.
X */
X
X if (!rundfiles)
X {
X if (verbose)
X message("system delivery file disabled\n");
X return -1;
X }
X
X /*
X * Collect the arguments for the delivery file.
X */
X
X fav = (char **) zalloc((dac + 3) * sizeof(char **));
X fav[0] = shell;
X fav[1] = sys_deliver;
X fac = 2;
X
X for (a = 0; a < dac; ++a)
X {
X char *addr;
X
X addr = dav[a];
X if (valid_address(addr))
X {
X /* Let the delivery file handle valid addresses. */
X
X fav[fac++] = addr;
X }
X else
X {
X /* Note invalid address(es); report them later. */
X
X (void) dest(addr, (char *) NULL);
X }
X }
X
X fav[fac] = NULL;
X
X /*
X * If there were any good names found, let loose the delivery
X * file. Note the meaning of "good" is "well-formed", not "valid".
X * Thus the system delivery file has control over the handling of
X * all local deliveries, not just those to valid users.
X */
X
X if (fac > 2)
X (void) do_dfile(eff_ct, fav, (DEST *)NULL);
X
X free((char *) fav);
X
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Filter some undelivered destinations through the post-user
X * delivery file.
X */
X
Xpost_dfile()
X{
X DEST *d;
X char **fav;
X int num_dests, fac;
X struct stat st;
X
X /*
X * If there is no post-user delivery file, forget it.
X */
X
X if (stat(post_deliver, &st) == -1)
X {
X if (verbose)
X message("no post-user delivery file\n");
X return -1;
X }
X
X /*
X * If we've been asked not to run delivery files, forget it.
X */
X
X if (!rundfiles)
X {
X if (verbose)
X message("post-user delivery file disabled\n");
X return -1;
X }
X
X /*
X * Generate the delivery file argument list.
X */
X
X num_dests = 0;
X for (d = first_dest(); d; d = next_dest(d))
X ++num_dests;
X
X fav = (char **) zalloc((num_dests + 3) * sizeof(char **));
X fav[0] = shell;
X fav[1] = post_deliver;
X fac = 2;
X
X for (d = first_dest(); d; d = next_dest(d))
X {
X if ((d->d_class == CL_USER || d->d_class == CL_UUCP)
X && (d->d_state == ST_WORKING
X || (d->d_state == ST_ERROR && d->d_error == E_NSUSER)))
X {
X fav[fac++] = d->d_name;
X d->d_state = ST_HOLD;
X }
X }
X
X fav[fac] = NULL;
X
X if (fac > 2)
X (void) do_dfile(eff_ct, fav, (DEST *)NULL);
X
X free((char *) fav);
X
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Filter all user destinations through their local delivery files.
X */
X
Xuser_dfiles()
X{
X DEST *d;
X int nfound;
X
X /*
X * If we've been asked not to run delivery files, forget it.
X */
X
X if (!rundfiles)
X {
X if (verbose)
X message("user delivery files disabled\n");
X
X return -1;
X }
X
X
X /*
X * Continue to loop through all addresses until no destination
X * that needs expanding can be found.
X */
X
X do {
X nfound = 0;
X for (d = first_dest(); d; d = next_dest(d))
X {
X if (d->d_class == CL_USER
X && d->d_state == ST_WORKING
X && !d->d_dfdone)
X {
X one_dfile(d);
X d->d_dfdone = TRUE;
X }
X }
X } while (nfound > 0);
X
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Run the delivery file (if any) for the specified destination.
X */
X
Xone_dfile(d)
XDEST *d;
X{
X CONTEXT *ct;
X char *fav[4];
X char udel_path[100];
X struct stat st;
X
X if ((ct = name_context(d->d_name)) == NULL)
X {
X dest_err(d, E_CTLOST);
X return;
X }
X
X /*
X * If user's home directory is missing, forget it.
X * If user's home directory is writable to the world,
X * executing the delivery file would allow a security breach!
X * Thanks to Jon Zeeff for this hint...
X */
X
X if (stat(ct->ct_home, &st) == -1
X || (st.st_mode & S_IFMT) != S_IFDIR)
X {
X if (verbose)
X message("user %s: home directory %s is missing!\n",
X ct->ct_name, ct->ct_home);
X return;
X }
X
X if (st.st_mode & 02)
X {
X if (verbose)
X message("user %s: home directory is writable to the world!\n",
X ct->ct_name);
X return;
X }
X
X /*
X * If there is no delivery file to execute, just return.
X */
X
X (void) sprintf(udel_path, "%s/%s", ct->ct_home, user_deliver);
X if (stat(udel_path, &st) == -1)
X {
X if (verbose)
X message("%s has no delivery file\n", d->d_name);
X return;
X }
X
X /*
X * Time to run the file!
X * We put this dest on hold, so that it will be ignored unless
X * the delivery file names it.
X */
X
X d->d_state = ST_HOLD;
X
X fav[0] = shell;
X fav[1] = udel_path;
X fav[2] = d->d_name;
X fav[3] = NULL;
X (void) do_dfile(ct, fav, d);
X}
X
X/*----------------------------------------------------------------------
X * Process a delivery file.
X */
X
Xint
Xdo_dfile(ct, av, d)
XCONTEXT *ct;
Xchar **av;
XDEST *d;
X{
X FILE *fp;
X char *name, *mailbox;
X
X if (!ct)
X return -1;
X
X if (! ok_context(ct))
X {
X if (d)
X dest_err(d, E_CTPERM);
X else
X message("No permissions to run as %s\n", ct->ct_name);
X
X return -1;
X }
X
X /* Copy the temp files again */
X
X if (copy_again() < 0)
X return -1;
X
X /* Allow the given user to own and read the copies */
X
X if (give_temps(ct) < 0)
X return -1;
X
X /* Here we go! */
X
X if (verbose)
X message("Processing delivery file as %s\n", ct->ct_name);
X
X if ((fp = ct_popenv(ct, shell, av, "r")) == NULL)
X {
X error("can't execute delivery file as %s\n", ct->ct_name);
X return -1;
X }
X
X /*
X * Read the standard output of the delivery file.
X */
X
X while (dfile_gets(fp, &name, &mailbox) >= 0)
X {
X DEST *nd;
X
X nd = dest(name, mailbox);
X if (nd->d_state == ST_HOLD)
X nd->d_state = ST_WORKING;
X
X /*
X * If the delivery file specified a mailbox, verify
X * that the user whose delivery file is running has
X * permissions for the requested context.
X */
X
X if ((nd->d_state == ST_WORKING) && (mailbox != NULL))
X {
X CONTEXT *nct;
X
X if ((nct = name_context(name)) == NULL)
X dest_err(nd, E_CTLOST);
X else if (! ok_context(nct))
X dest_err(nd, E_CTPERM);
X }
X }
X
X return ct_pclose(fp);
X}
X
X/*----------------------------------------------------------------------
X * Get and parse a single delivery file output line.
X */
X
Xint
Xdfile_gets(fp, namep, mailboxp)
XFILE *fp;
Xchar **namep;
Xchar **mailboxp;
X{
X char *p, *q;
X static char buf[BUFSIZ];
X
X if (fgets(buf, GETSIZE(buf), fp) == NULL)
X return -1;
X
X if ((p = strchr(buf, '\n')) != NULL)
X *p = 0;
X else
X {
X int c;
X
X while ((c = fgetc(fp)) != '\n' && c != EOF)
X ; /* keep reading */
X
X error("invalid line from delivery file: '%s'\n", buf);
X return -1;
X }
X
X /* Strip out all whitespace and eliminate duplicated slashes */
X
X p = q = buf;
X while (*p)
X {
X if (isspace(*p))
X ++p;
X else if ((*q++ = *p++) == '/')
X {
X while (*p == '/')
X ++p;
X }
X }
X *q = 0;
X
X /* Debugging message: display input line */
X
X if (verbose)
X message("\t'%s'\n", buf);
X
X if ((p = strchr(buf, ':')) != NULL)
X {
X *p++ = 0;
X if ((q = strchr(p, ':')) != NULL)
X *q = 0;
X }
X
X *namep = buf;
X *mailboxp = p;
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Make the temp files readable in the given context.
X * This is needed because the temps are readable by owner only.
X */
X
Xint
Xgive_temps(ct)
XCONTEXT *ct;
X{
X int err, t;
X
X if (!ct)
X return -1;
X
X err = 0;
X for (t = T_HDRCOPY; t <= T_BODYCOPY; ++t)
X {
X if (chmod(tfile[t], 0600) == -1)
X {
X syserr("can't chmod %s", tfile[t]);
X ++err;
X }
X if (chown(tfile[t], ct->ct_uid, ct->ct_gid) == -1)
X {
X syserr("can't chown %s to %d/%d",
X tfile[t], ct->ct_uid, ct->ct_gid);
X ++err;
X }
X }
X
X return err ? -1 : 0;
X}
END_OF_FILE
if test 8068 -ne `wc -c <'dfile.c'`; then
echo shar: \"'dfile.c'\" unpacked with wrong size!
fi
# end of 'dfile.c'
fi
if test -f 'lock.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'lock.c'\"
else
echo shar: Extracting \"'lock.c'\" \(7155 characters\)
sed "s/^X//" >'lock.c' <<'END_OF_FILE'
X/* $Header: lock.c,v 2.1 89/06/09 12:25:30 network Exp $
X *
X * Mailbox locking.
X * Local hacks for mailbox access should be grafted here.
X *
X * $Log: lock.c,v $
X * Revision 2.1 89/06/09 12:25:30 network
X * Update RCS revisions.
X *
X * Revision 1.6 89/06/09 12:23:52 network
X * Baseline for 2.0 release.
X *
X */
X
X#include "deliver.h"
X
X/*
X * Validate the locking configuration.
X */
X
X#if (defined(ML_FCNTL) + defined(ML_LOCKF) + defined(ML_LOCKING)) > 1
X lose! "Only one of ML_FCNTL, ML_LOCKF and ML_LOCKING may be defined.";
X#endif
X
X/*
X * Support for the lockf() system call.
X */
X
X#ifdef ML_LOCKF
X#include <unistd.h>
X#define SIMPLE_LOCK "lockf"
X#define LOCKFD(fd, size) lockf(fd, F_LOCK, size)
X#define UNLOCKFD(fd, size) lockf(fd, F_ULOCK, size)
X#endif /* ML_LOCKF */
X
X/*
X * Setup for the locking() system call.
X */
X
X#ifdef ML_LOCKING
X#include <sys/locking.h>
X#define SIMPLE_LOCK "locking"
X#define LOCKFD(fd, size) locking(fd, LK_LOCK, size)
X#define UNLOCKFD(fd, size) locking(fd, LK_UNLOCK, size)
X#endif
X
X/*
X * Local functions.
X */
X
X#ifdef ML_DOTLOCK
Xstatic char *dotlock_name();
X#endif
X#ifdef ML_DOTMLK
Xstatic char *dotmlk_name();
X#endif
X
X/*----------------------------------------------------------------------
X * Lock a mailbox by name.
X *
X * This code looks quite hairy with all the ifdefs. In fact, the only
X * somewhat strange thing here is that neither, either, or both of
X * ML_DOTLOCK and ML_DOTMLK may be defined, and we have to allow for it.
X */
X
Xint
Xname_lock(name)
Xchar *name;
X{
X#ifdef ML_DOTLOCK
X char *dotlock;
X#endif
X#ifdef ML_DOTMLK
X char *dotmlk;
X#endif
X
X#ifdef ML_DOTLOCK
X if ((dotlock = dotlock_name(name)) == NULL
X || create_lockfile(dotlock) < 0)
X return -1;
X#endif /* ML_DOTLOCK */
X
X#ifdef ML_DOTMLK
X if ((dotmlk = dotmlk_name(name)) == NULL
X || create_lockfile(dotmlk) < 0)
X {
X#ifdef ML_DOTLOCK
X (void) remove_lockfile(dotlock); /* don't leave me hanging */
X#endif
X return -1;
X }
X#endif /* ML_DOTMLK */
X
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Unlock a mailbox by name.
X */
X
Xint
Xname_unlock(name)
Xchar *name;
X{
X int ret = 0;
X
X#ifdef ML_DOTLOCK
X char *dotlock;
X#endif
X#ifdef ML_DOTMLK
X char *dotmlk;
X#endif
X
X#ifdef ML_DOTLOCK
X if ((dotlock = dotlock_name(name)) == NULL
X || remove_lockfile(dotlock) < 0)
X ret = -1;
X#endif /* ML_DOTLOCK */
X
X#ifdef ML_DOTMLK
X if ((dotmlk = dotmlk_name(name)) == NULL
X || remove_lockfile(dotmlk) < 0)
X ret = -1;
X#endif /* ML_DOTMLK */
X
X return ret;
X}
X
X/*----------------------------------------------------------------------
X * Lock a file descriptor.
X */
X
Xint
Xfd_lock(fd)
Xint fd;
X{
X#ifdef ML_FCNTL
X struct flock fl;
X
X fl.l_type = F_WRLCK;
X fl.l_whence = 0;
X fl.l_start = 0L;
X fl.l_len = 0L;
X
X if (fcntl(fd, F_SETLKW, &fl) == -1)
X {
X syserr("can't lock with fcntl()");
X return -1;
X }
X
X if (verbose)
X message("locked mailbox with fcntl()\n");
X#endif /* ML_FCNTL */
X
X#ifdef SIMPLE_LOCK
X long pos;
X
X if ((pos = lseek(fd, 0L, 0)) == -1)
X {
X syserr("can't seek in mailbox");
X return -1;
X }
X if (LOCKFD(fd, 0L) == -1)
X {
X syserr("can't lock with %s()", SIMPLE_LOCK);
X return -1;
X }
X if (lseek(fd, pos, 0) == -1)
X {
X syserr("can't seek in mailbox");
X return -1;
X }
X
X if (verbose)
X message("locked mailbox with %s()\n", SIMPLE_LOCK);
X#endif /* SIMPLE_LOCK */
X
X /* Default: success */
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Unlock a file descriptor.
X */
X
Xint
Xfd_unlock(fd)
Xint fd;
X{
X#ifdef ML_FCNTL
X struct flock fl;
X
X fl.l_type = F_UNLCK;
X fl.l_whence = 0;
X fl.l_start = 0L;
X fl.l_len = 0L;
X
X if (fcntl(fd, F_SETLKW, &fl) == -1)
X {
X syserr("can't unlock with fcntl()");
X return -1;
X }
X
X if (verbose)
X message("unlocked mailbox with fcntl()\n");
X#endif /* ML_FCNTL */
X
X#ifdef SIMPLE_LOCK
X long pos;
X
X if ((pos = lseek(fd, 0L, 0)) == -1)
X {
X syserr("can't seek in mailbox");
X return -1;
X }
X if (LOCKFD(fd, 0L) == -1)
X {
X syserr("can't unlock with %s()", SIMPLE_LOCK);
X return -1;
X }
X if (lseek(fd, pos, 0) == -1)
X {
X syserr("can't seek in mailbox");
X return -1;
X }
X
X if (verbose)
X message("unlocked mailbox with %s()\n", SIMPLE_LOCK);
X#endif /* SIMPLE_LOCK */
X
X /* Default: success */
X return 0;
X}
X
X/*----------------------------------------------------------------------
X * Return the name of the appropriate ".lock" file for a mailbox.
X */
X
X#ifdef ML_DOTLOCK
X
Xstatic char *
Xdotlock_name(name)
Xchar *name;
X{
X static char *lname = NULL;
X static int lsize = 0;
X char *p;
X int n, i;
X
X n = strlen(name);
X if (lsize < n + 8)
X {
X if (lname)
X free(lname);
X lsize = n + 32;
X lname = zalloc(lsize);
X }
X
X (void) strcpy(lname, name);
X
X /*
X * We want as much of `basename.lock' as will fit in a string
X * MAX_NAMESIZE long.
X */
X for (i = 0, p = basename(lname); (i < MAX_NAMESIZE - 5) && (*p); ++i)
X ++p;
X (void) strcpy(p, ".lock");
X
X return lname;
X}
X
X#endif /* ML_DOTLOCK */
X
X/*----------------------------------------------------------------------
X * Return the name of the appropriate ".mlk" file for a mailbox.
X */
X
X#ifdef ML_DOTMLK
X
Xstatic char *
Xdotmlk_name(name)
Xchar *name;
X{
X static char lname[MAX_NAMESIZE + 16];
X char *p, *d;
X int i;
X
X /*
X * To explain the below: If we ass_u_me that MAX_NAMESIZE is 14,
X * then this code is like `printf(lname, "/tmp/%.10s.mlk", ...)'.
X * In other words, we want as much of `basename.mlk' as will fit
X * in a string MAX_NAMESIZE long.
X */
X d = lname;
X for (p = "/tmp/"; *p; )
X *d++ = *p++;
X for (i = 0, p = basename(name); (i < MAX_NAMESIZE - 4) && (*p); ++i)
X *d++ = *p++;
X (void) strcpy(d, ".mlk");
X
X return lname;
X}
X
X#endif /* ML_DOTMLK */
X
X/*----------------------------------------------------------------------
X * Create a lockfile.
X */
X
Xint
Xcreate_lockfile(name)
Xchar *name;
X{
X#ifndef O_CREAT
X char *othername, *p;
X#endif
X int fd, tries;
X
X#ifndef O_CREAT
X othername = zalloc(strlen(name) + 20); /* fudge (???) */
X (void) strcpy(othername, name);
X (void) sprintf(basename(othername), ".dl.%d", getpid());
X if ((fd = creat(othername, 0)) == -1)
X {
X syserr("can't create %s", othername);
X return -1;
X }
X (void) close(fd);
X if (verbose)
X message("created pre-lockfile %s\n", name);
X#endif
X
X for (tries = 0; tries < 10; ++tries)
X {
X if (tries)
X snooze(3);
X
X#ifdef O_CREAT
X
X if ((fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0)) >= 0)
X {
X (void) close(fd);
X if (verbose)
X message("created lockfile %s\n", name);
X return 0;
X }
X
X#else /* not O_CREAT */
X
X if (link(othername, name) == 0)
X {
X if (unlink(othername) == -1)
X syserr("can't remove %s", othername);
X free(othername);
X if (verbose)
X message("created lockfile %s\n", name);
X return 0;
X }
X
X#endif /* not O_CREAT */
X
X if (verbose && (tries == 0))
X message("Waiting to create %s\n", name);
X }
X
X syserr("can't create lockfile %s", name);
X return -1;
X}
X
X/*----------------------------------------------------------------------
X * Remove a lockfile.
X */
X
Xint
Xremove_lockfile(name)
Xchar *name;
X{
X if (unlink(name) == -1)
X {
X syserr("can't remove lockfile %s", name);
X return -1;
X }
X
X if (verbose)
X message("removed lockfile %s\n", name);
X
X return 0;
X}
END_OF_FILE
if test 7155 -ne `wc -c <'lock.c'`; then
echo shar: \"'lock.c'\" unpacked with wrong size!
fi
# end of 'lock.c'
fi
if test -f 'main.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'main.c'\"
else
echo shar: Extracting \"'main.c'\" \(12025 characters\)
sed "s/^X//" >'main.c' <<'END_OF_FILE'
X/* $Header: main.c,v 2.1 89/06/09 12:25:32 network Exp $
X *
X * A program to deliver local mail with some flexibility.
X *
X * $Log: main.c,v $
X * Revision 2.1 89/06/09 12:25:32 network
X * Update RCS revisions.
X *
X * Revision 1.13 89/06/09 12:23:53 network
X * Baseline for 2.0 release.
X *
X */
X
X#include "deliver.h"
X#include "patchlevel.h"
X#include <signal.h>
X
X/*
X * External data.
X */
X
X/* Variables set by getopt() [blech] */
X
Xextern int optind, opterr;
Xextern char *optarg;
X
X/*
X * Local data
X */
X
Xstatic char sys_dfl[] = SYS_DELIVER;
Xstatic char post_dfl[] = POST_DELIVER;
Xstatic char user_dfl[] = USER_DELIVER;
X
X/*
X * Global data
X */
X
Xint verbose = FALSE;
Xint dryrun = FALSE;
Xint rundfiles = TRUE;
Xint printaddrs = FALSE;
Xint leavetemps = FALSE;
Xint boxdelivery = FALSE;
X
Xchar *progname = "deliver";
Xchar version[32] = "2.0";
Xchar *shell = SHELL;
X
Xchar *sys_deliver = sys_dfl;
Xchar *post_deliver = post_dfl;
Xchar *user_deliver = user_dfl;
Xchar *sender = NULL;
Xchar *hostname = NULL;
X
Xint eff_uid = -1;
Xint eff_gid = -1;
Xint real_uid = -1;
Xint real_gid = -1;
X
XCONTEXT *eff_ct = NULL;
XCONTEXT *real_ct = NULL;
X
Xint tty_input = FALSE;
XSIGFLAG got_sig = FALSE;
X
Xint trust_user = FALSE;
Xint trust_delfiles = FALSE;
X
Xchar *ttype[T_MAX] = { "header", "body", "header copy", "body copy" };
Xchar *tfile[T_MAX] = { NULL, NULL, NULL, NULL };
Xchar *tenv[T_MAX] = { NULL, NULL, ENV_HEADER, ENV_BODY };
Xint tfd[T_MAX] = { -1, -1, -1, -1 };
X
X/*
X * Local functions.
X */
X
Xstatic SIGTYPE sighup(), sigint(), sigquit();
X
X/*----------------------------------------------------------------------
X * The Program.
X */
X
Xmain(argc, argv)
Xint argc;
Xchar **argv;
X{
X char *p;
X int u, c, errcount, copy;
X
X /* Make sure that stdout and stderr are interleaved correctly */
X
X Linebuf(stdout);
X Linebuf(stderr);
X
X /* Figure out the name used to invoke this program. */
X
X progname = basename(argv[0]);
X
X /* What version of the program is this? */
X
X (void) sprintf(version + strlen(version), ".%02d", PATCHLEVEL);
X
X /* Figure out the name of this host */
X
X if ((hostname = gethost()) == NULL)
X {
X hostname = "unknown";
X error("unable to determine host name; using \"%s\"\n",
X hostname);
X }
X
X /* Find effective and real uids and gids. */
X
X eff_uid = geteuid();
X eff_gid = getegid();
X real_uid = getuid();
X real_gid = getgid();
X
X if (eff_uid != real_uid && eff_uid != 0)
X {
X error("if setuid, must be setuid root\n");
X leave(1);
X }
X
X /* Process environment: handle recursive invocation */
X
X if ((p = getenv(ENV_DFLAGS)) != NULL)
X {
X while (*p)
X {
X switch (*p++)
X {
X case 'v':
X verbose = TRUE;
X break;
X case 'd':
X verbose = TRUE;
X dryrun = TRUE;
X break;
X case 'A':
X printaddrs = TRUE;
X dryrun = TRUE;
X break;
X case 'n':
X rundfiles = FALSE;
X break;
X case 't':
X leavetemps = TRUE;
X break;
X }
X }
X }
X
X if ((p = getenv(ENV_SYSDEL)) != NULL && *p)
X sys_deliver = p;
X if ((p = getenv(ENV_POSTDEL)) != NULL && *p)
X post_deliver = p;
X if ((p = getenv(ENV_USERDEL)) != NULL && *p)
X user_deliver = p;
X if ((p = getenv(ENV_SENDER)) != NULL && *p)
X sender = p;
X if ((p = getenv(ENV_HOSTNAME)) != NULL && *p)
X hostname = p;
X
X /* Parse command line arguments */
X
X while ((c = getopt(argc, argv, "vdAntbs:p:u:r:h:")) != EOF)
X {
X switch (c)
X {
X case 'v':
X verbose = TRUE;
X break;
X case 'd':
X verbose = TRUE;
X dryrun = TRUE;
X break;
X case 'A':
X printaddrs = TRUE;
X dryrun = TRUE;
X break;
X case 'n':
X rundfiles = FALSE;
X break;
X case 't':
X leavetemps = TRUE;
X break;
X case 'b':
X boxdelivery = TRUE;
X break;
X case 's':
X if (*optarg)
X sys_deliver = optarg;
X break;
X case 'p':
X if (*optarg)
X post_deliver = optarg;
X break;
X case 'u':
X if (*optarg)
X user_deliver = optarg;
X break;
X case 'r':
X if (*optarg)
X sender = optarg;
X break;
X case 'h':
X if (*optarg)
X hostname = optarg;
X break;
X case '?':
X usage();
X }
X }
X
X /* If no destinations were given, forget it. */
X
X if (optind >= argc)
X {
X error("no recipients specified\n");
X usage();
X }
X
X /* Print a debugging message */
X
X if (verbose)
X {
X message("%s %s running on host %s\n",
X progname, version, hostname);
X }
X
X /* Do we trust our caller? */
X
X if (trusted_uid(real_uid))
X trust_user = TRUE;
X
X /* Do we trust our delivery files? */
X
X if (strcmp(sys_dfl, sys_deliver) == 0
X && strcmp(post_dfl, post_deliver) == 0
X && strcmp(user_dfl, user_deliver) == 0)
X trust_delfiles = TRUE;
X
X /* Renounce special privileges if something insecure was requested. */
X
X if (!trust_user && !trust_delfiles)
X {
X if (setgid(eff_gid = real_gid) == -1
X || setuid(eff_uid = real_uid) == -1)
X {
X syserr("can't renounce setuid privileges");
X leave(1);
X }
X }
X
X /* Get the contexts of our effective and real uids. */
X
X if ((eff_ct = uid_context(eff_uid)) == NULL)
X error("invalid effective uid %d!?\n", eff_uid);
X
X if ((real_ct = uid_context(real_uid)) == NULL)
X error("invalid real uid %d!?\n", real_uid);
X
X if (!eff_ct || !real_ct)
X leave(1);
X
X if (verbose)
X {
X message("effective uid = %s (%d/%d); real uid = %s (%d/%d)\n",
X eff_ct->ct_name, eff_ct->ct_uid, eff_ct->ct_gid,
X real_ct->ct_name, real_ct->ct_uid, real_ct->ct_gid);
X }
X
X /* Let's be sane about the file creation mask. */
X
X u = umask(0);
X u &= ~0700; /* Let's not deprive ourselves of permissions. */
X u |= 022; /* Let's be reasonably paranoid about writing. */
X (void) umask(u);
X
X /*
X * Where is the message coming from?
X */
X
X if (isatty(0))
X tty_input = TRUE;
X
X /*
X * If we are not going to deliver, or if we are receiving the
X * message from a tty, catch signals so we can remove temp files.
X * Otherwise, ignore signals.
X */
X
X if (dryrun || tty_input)
X catch_sigs();
X else
X ignore_sigs();
X
X /*
X * Create the temporary files and write the message to them.
X */
X
X copy = copy_message();
X
X /*
X * No more signals...
X */
X
X ignore_sigs();
X
X /*
X * ... but if we had already caught a signal,
X * or if copy_msg() had a problem, leave.
X */
X
X if ((copy < 0) || got_sig)
X {
X if (got_sig)
X error("caught signal - exiting\n");
X leave(1);
X }
X
X /*
X * Set up useful environment variables.
X * Note that this must be done _after_ copy_message(),
X * since that's where the temp files are created.
X */
X
X setup_environ();
X
X /*
X * Perhaps we should consider all arguments as mailbox names...
X */
X
X if (boxdelivery)
X {
X int a;
X
X if (verbose)
X message("mailbox delivery as %s\n", real_ct->ct_name);
X
X /*
X * Consider all arguments as mailbox filenames.
X */
X
X for (a = optind; a < argc; ++a)
X (void) dest(real_ct->ct_name, argv[a]);
X
X if (verbose)
X dumpdests("(should all be mailboxes)");
X }
X
X /*
X * They're not mailbox names, so they should be mail addresses.
X */
X
X else
X {
X /* Run all destinations though the system delivery file. */
X
X if (sys_dfile(argc - optind, argv + optind) >= 0)
X {
X if (verbose)
X dumpdests("after running system delivery file");
X }
X else
X {
X int a;
X
X /*
X * System delivery file is missing or ignored.
X * Use the argument list verbatim.
X */
X
X for (a = optind; a < argc; ++a)
X (void) dest(argv[a], (char *) NULL);
X
X if (verbose)
X dumpdests("as taken from argument list");
X }
X
X /*
X * Run each user destination through his delivery file.
X */
X
X if (user_dfiles() >= 0)
X {
X if (verbose)
X dumpdests("after running user delivery files");
X }
X
X /*
X * Run each remaining destination though the post-user
X * delivery file.
X */
X
X if (post_dfile() >= 0)
X {
X if (verbose)
X dumpdests("after running post-user delivery file");
X }
X }
X
X /*
X * Drop mail in mailbox(es).
X */
X
X mbox_deliver();
X
X if (verbose)
X dumpdests("after delivery to all mailboxes");
X
X /*
X * Send mail to UUCP address(es).
X */
X
X uucp_deliver();
X
X if (verbose)
X dumpdests("after delivery to UUCP addresses");
X
X /*
X * Report any errors, and leave.
X */
X
X errcount = report_errors();
X
X /*
X * All done.
X */
X
X leave(errcount ? 1 : 0);
X /* NOTREACHED */
X}
X
X/*----------------------------------------------------------------------
X * Print a usage message and exit.
X */
X
Xusage()
X{
X message("Usage: %s [-b][-A][-d][-v][-n][-t][-r from][-h host] args\n", progname);
X message("-b All arguments are mailbox filenames.\n");
X message(" (Default: arguments are user names.)\n");
X message("-A Resolve addresses but do not deliver.\n");
X message("-d Be verbose but do not deliver.\n");
X message("-v Be verbose and deliver.\n");
X message("-n Do not run any delivery files.\n");
X message("-t Do not remote temp files before exiting.\n");
X message("-s file Specify the system delivery filename.\n");
X message("-p file Specify the post-user delivery filename.\n");
X message("-u file Specify the user delivery filename.\n");
X message("-r from Specify the address to appear in the \"From \" line.\n");
X message("-h host Specify the host name.\n");
X message("args Either user addresses or mailboxes (-b).\n");
X leave(1);
X}
X
X/*----------------------------------------------------------------------
X * Clean up and exit.
X */
X
Xleave(code)
Xint code;
X{
X if (! leavetemps)
X {
X int t;
X
X for (t = 0; t < T_MAX; ++t)
X {
X if (tfd[t] != -1)
X (void) close(tfd[t]);
X if (tfile[t] && unlink(tfile[t]) == -1)
X syserr("can't unlink %s", tfile[t]);
X }
X }
X
X exit(code);
X}
X
X/*----------------------------------------------------------------------
X * Catch signals.
X */
X
Xcatch_sigs()
X{
X if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
X (void) signal(SIGHUP, sighup);
X if (signal(SIGINT, SIG_IGN) != SIG_IGN)
X (void) signal(SIGINT, sigint);
X if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
X (void) signal(SIGQUIT, sigquit);
X}
X
X/*----------------------------------------------------------------------
X * Ignore signals.
X */
X
Xignore_sigs()
X{
X (void) signal(SIGHUP, SIG_IGN);
X (void) signal(SIGINT, SIG_IGN);
X (void) signal(SIGQUIT, SIG_IGN);
X}
X
Xstatic SIGTYPE
Xsighup()
X{
X (void) signal(SIGHUP, sighup);
X got_sig = TRUE;
X}
X
Xstatic SIGTYPE
Xsigint()
X{
X (void) signal(SIGINT, sigint);
X got_sig = TRUE;
X}
X
Xstatic SIGTYPE
Xsigquit()
X{
X (void) signal(SIGQUIT, sigquit);
X got_sig = TRUE;
X}
X
X/*----------------------------------------------------------------------
X * Report any errors to stderr.
X * Return an error count.
X */
X
Xint
Xreport_errors()
X{
X DEST *d;
X int count = 0;
X
X for (d = first_dest(); d; d = next_dest(d))
X {
X if (d->d_state != ST_ERROR)
X continue;
X
X if (++count == 1)
X {
X error(
X "delivery to the following address(es) failed on host %s\n",
X hostname);
X }
X
X message("\t\"%s\"", d->d_name);
X if (d->d_class == CL_MBOX)
X message(", mailbox \"%s\"", d->d_mailbox);
X message(": %s\n", derrmsg(d->d_error));
X }
X
X return count;
X}
X
X/*----------------------------------------------------------------------
X * Is the given uid trusted?
X */
X
Xint
Xtrusted_uid(uid)
Xint uid;
X{
X CONTEXT *ct;
X char **n;
X static char *t[] = { TRUSTED_USERS, 0 };
X
X for (n = t; *n; ++n)
X {
X if ((ct = name_context(*n)) != NULL && uid == ct->ct_uid)
X return TRUE;
X }
X
X return FALSE;
X}
X
X/*----------------------------------------------------------------------
X * Set up useful environment variables.
X */
X
Xsetup_environ()
X{
X char flags[8];
X int f = 0;
X
X flags[f++] = '-';
X if (verbose)
X flags[f++] = (dryrun ? 'd' : 'v');
X if (printaddrs)
X flags[f++] = 'A';
X if (leavetemps)
X flags[f++] = 't';
X flags[f] = 0;
X
X alloc_env(ENV_DFLAGS, (f > 1) ? flags : "");
X if (sys_deliver && *sys_deliver)
X alloc_env(ENV_SYSDEL, sys_deliver);
X if (user_deliver && *user_deliver)
X alloc_env(ENV_USERDEL, user_deliver);
X if (hostname && *hostname)
X alloc_env(ENV_HOSTNAME, hostname);
X if (sender && *sender)
X alloc_env(ENV_SENDER, sender);
X
X alloc_env("IFS", " \t\n");
X del_env("ENV"); /* in case SHELL is ksh */
X}
END_OF_FILE
if test 12025 -ne `wc -c <'main.c'`; then
echo shar: \"'main.c'\" unpacked with wrong size!
fi
# end of 'main.c'
fi
echo shar: End of shell archive.
exit 0
--
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