mirror of
https://github.com/openbsd/src.git
synced 2025-01-10 06:47:55 -08:00
114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <skey.h>
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#include <sys/types.h>
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#include <sys/param.h>
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extern char *__progname;
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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struct passwd *pw;
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struct skey key;
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int ch, errs, left = 0, iflag = 0, limit = 12;
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char *name, hostname[MAXHOSTNAMELEN];
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FILE *out;
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while ((ch = getopt(argc, argv, "il:")) != -1)
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switch(ch) {
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case 'i':
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iflag = 1;
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break;
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case 'l':
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errno = 0;
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if ((limit = (int)strtol(optarg, NULL, 10)) == 0)
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errno = ERANGE;
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if (errno) {
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warn("key limit");
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usage();
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}
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break;
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default:
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usage();
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}
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if (argc - optind > 0)
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usage();
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if ((pw = getpwuid(getuid())) == NULL)
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errx(1, "no passwd entry for uid %u", getuid());
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if ((name = strdup(pw->pw_name)) == NULL)
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err(1, "cannot allocate memory");
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sevenbit(name);
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errs = skeylookup(&key, name);
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switch (errs) {
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case 0: /* Success! */
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left = key.n - 1;
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break;
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case -1: /* File error */
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/* XXX - _PATH_SKEYFILE should be in paths.h? */
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warnx("cannot open /etc/skeykeys");
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break;
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case 1: /* Unknown user */
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warnx("%s is not listed in /etc/skeykeys", name);
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}
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setuid(getuid()); /* Run sendmail as user not root */
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if (errs || left >= limit)
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exit(errs);
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if (gethostname(hostname, sizeof(hostname)) == -1)
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strcpy(hostname, "unknown");
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if (iflag) {
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out = stdout;
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} else {
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char cmd[sizeof(_PATH_SENDMAIL) + 3];
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sprintf(cmd, "%s -t", _PATH_SENDMAIL);
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out = popen(cmd, "w");
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}
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if (!iflag)
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(void)fprintf(out,
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"To: %s\nSubject: IMPORTANT action required\n", name);
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(void)fprintf(out,
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"\nYou are nearing the end of your current S/Key sequence for account\n\
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%s on system %s.\n\n\
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Your S/key sequence number is now %d. When it reaches zero\n\
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you will no longer be able to use S/Key to login into the system.\n\n\
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Type \"skeyinit -s\" to reinitialize your sequence number.\n\n",
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name, hostname, left - 1);
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if (iflag)
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(void)fclose(out);
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else
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(void)pclose(out);
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exit(0);
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}
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void
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usage()
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{
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(void)fprintf(stderr, "Usage: %s [-i] [-l limit]\n",
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__progname);
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exit(1);
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}
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