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path: root/usr.sbin/cron/crontab.c
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Diffstat (limited to 'usr.sbin/cron/crontab.c')
-rw-r--r--usr.sbin/cron/crontab.c164
1 files changed, 62 insertions, 102 deletions
diff --git a/usr.sbin/cron/crontab.c b/usr.sbin/cron/crontab.c
index e1846993206..804c61b5b52 100644
--- a/usr.sbin/cron/crontab.c
+++ b/usr.sbin/cron/crontab.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: crontab.c,v 1.87 2015/11/11 17:19:22 millert Exp $ */
+/* $OpenBSD: crontab.c,v 1.88 2015/11/11 21:20:51 millert Exp $ */
/* Copyright 1988,1990,1993,1994 by Paul Vixie
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
@@ -64,7 +64,8 @@ static int replace_cmd(void);
static void
usage(const char *msg)
{
- fprintf(stderr, "%s: usage error: %s\n", __progname, msg);
+ if (msg != NULL)
+ warnx("usage error: %s", msg);
fprintf(stderr, "usage: %s [-u user] file\n", __progname);
fprintf(stderr, " %s [-e | -l | -r] [-u user]\n", __progname);
fprintf(stderr,
@@ -85,8 +86,7 @@ main(int argc, char *argv[])
if (pledge("stdio rpath wpath cpath fattr getpw unix id proc exec",
NULL) == -1) {
- perror("pledge");
- exit(EXIT_FAILURE);
+ err(EXIT_FAILURE, "pledge");
}
setlocale(LC_ALL, "");
@@ -95,9 +95,7 @@ main(int argc, char *argv[])
parse_args(argc, argv); /* sets many globals, opens a file */
set_cron_cwd();
if (!allowed(RealUser, CRON_ALLOW, CRON_DENY)) {
- fprintf(stderr,
- "You (%s) are not allowed to use this program (%s)\n",
- User, __progname);
+ fprintf(stderr, "You do not have permission to use crontab\n");
fprintf(stderr, "See crontab(1) for more information\n");
log_it(RealUser, "AUTH", "crontab command not allowed");
exit(EXIT_FAILURE);
@@ -130,16 +128,10 @@ parse_args(int argc, char *argv[])
{
int argch;
- if (!(pw = getpwuid(getuid()))) {
- fprintf(stderr, "%s: your UID isn't in the passwd file.\n",
- __progname);
- fprintf(stderr, "bailing out.\n");
- exit(EXIT_FAILURE);
- }
- if (strlen(pw->pw_name) >= sizeof User) {
- fprintf(stderr, "username too long\n");
- exit(EXIT_FAILURE);
- }
+ if (!(pw = getpwuid(getuid())))
+ errx(EXIT_FAILURE, "your UID isn't in the password database");
+ if (strlen(pw->pw_name) >= sizeof User)
+ errx(EXIT_FAILURE, "username too long");
strlcpy(User, pw->pw_name, sizeof(User));
strlcpy(RealUser, User, sizeof(RealUser));
Filename[0] = '\0';
@@ -147,16 +139,11 @@ parse_args(int argc, char *argv[])
while ((argch = getopt(argc, argv, "u:ler")) != -1) {
switch (argch) {
case 'u':
- if (getuid() != 0) {
- fprintf(stderr,
- "must be privileged to use -u\n");
- exit(EXIT_FAILURE);
- }
- if (!(pw = getpwnam(optarg))) {
- fprintf(stderr, "%s: user `%s' unknown\n",
- __progname, optarg);
- exit(EXIT_FAILURE);
- }
+ if (getuid() != 0)
+ errx(EXIT_FAILURE,
+ "only the super user may use -u");
+ if (!(pw = getpwnam(optarg)))
+ errx(EXIT_FAILURE, "unknown user %s", optarg);
if (strlcpy(User, optarg, sizeof User) >= sizeof User)
usage("username too long");
break;
@@ -176,7 +163,7 @@ parse_args(int argc, char *argv[])
Option = opt_edit;
break;
default:
- usage("unrecognized option");
+ usage(NULL);
}
}
@@ -211,18 +198,12 @@ parse_args(int argc, char *argv[])
* the race.
*/
- if (setegid(user_gid) < 0) {
- perror("setegid(user_gid)");
- exit(EXIT_FAILURE);
- }
- if (!(NewCrontab = fopen(Filename, "r"))) {
- perror(Filename);
- exit(EXIT_FAILURE);
- }
- if (setegid(crontab_gid) < 0) {
- perror("setegid(crontab_gid)");
- exit(EXIT_FAILURE);
- }
+ if (setegid(user_gid) < 0)
+ err(EXIT_FAILURE, "setegid(user_gid)");
+ if (!(NewCrontab = fopen(Filename, "r")))
+ err(EXIT_FAILURE, "%s", Filename);
+ if (setegid(crontab_gid) < 0)
+ err(EXIT_FAILURE, "setegid(crontab_gid)");
}
}
}
@@ -234,15 +215,13 @@ list_cmd(void)
FILE *f;
log_it(RealUser, "LIST", User);
- if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n)) {
- fprintf(stderr, "path too long\n");
- exit(EXIT_FAILURE);
- }
+ if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n))
+ errc(EXIT_FAILURE, ENAMETOOLONG, "%s/%s", CRON_SPOOL, User);
if (!(f = fopen(n, "r"))) {
if (errno == ENOENT)
- fprintf(stderr, "no crontab for %s\n", User);
+ warnx("no crontab for %s", User);
else
- perror(n);
+ warn("%s", n);
exit(EXIT_FAILURE);
}
@@ -260,15 +239,13 @@ delete_cmd(void)
char n[MAX_FNAME];
log_it(RealUser, "DELETE", User);
- if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n)) {
- fprintf(stderr, "path too long\n");
- exit(EXIT_FAILURE);
- }
+ if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n))
+ errc(EXIT_FAILURE, ENAMETOOLONG, "%s/%s", CRON_SPOOL, User);
if (unlink(n) != 0) {
if (errno == ENOENT)
- fprintf(stderr, "no crontab for %s\n", User);
+ warnx("no crontab for %s", User);
else
- perror(n);
+ warn("%s", n);
exit(EXIT_FAILURE);
}
poke_daemon(CRON_SPOOL, RELOAD_CRON);
@@ -291,25 +268,18 @@ edit_cmd(void)
struct timespec ts[2];
log_it(RealUser, "BEGIN EDIT", User);
- if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n)) {
- fprintf(stderr, "path too long\n");
- exit(EXIT_FAILURE);
- }
+ if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n))
+ errc(EXIT_FAILURE, ENAMETOOLONG, "%s/%s", CRON_SPOOL, User);
if (!(f = fopen(n, "r"))) {
- if (errno != ENOENT) {
- perror(n);
- exit(EXIT_FAILURE);
- }
- fprintf(stderr, "no crontab for %s - using an empty one\n",
- User);
- if (!(f = fopen(_PATH_DEVNULL, "r"))) {
- perror(_PATH_DEVNULL);
- exit(EXIT_FAILURE);
- }
+ if (errno != ENOENT)
+ err(EXIT_FAILURE, "%s", n);
+ warnx("creating new crontab for %s", User);
+ if (!(f = fopen(_PATH_DEVNULL, "r")))
+ err(EXIT_FAILURE, _PATH_DEVNULL);
}
if (fstat(fileno(f), &statbuf) < 0) {
- perror("fstat");
+ warn("fstat");
goto fatal;
}
ts[0] = statbuf.st_atim;
@@ -322,16 +292,16 @@ edit_cmd(void)
if (snprintf(Filename, sizeof Filename, "%scrontab.XXXXXXXXXX",
_PATH_TMP) >= sizeof(Filename)) {
- fprintf(stderr, "path too long\n");
+ warnc(ENAMETOOLONG, "%scrontab.XXXXXXXXXX", _PATH_TMP);
goto fatal;
}
t = mkstemp(Filename);
if (t == -1) {
- perror(Filename);
+ warn("%s", Filename);
goto fatal;
}
if (!(NewCrontab = fdopen(t, "r+"))) {
- perror("fdopen");
+ warn("fdopen");
goto fatal;
}
@@ -339,16 +309,14 @@ edit_cmd(void)
copy_crontab(f, NewCrontab);
fclose(f);
- if (fflush(NewCrontab) < 0) {
- perror(Filename);
- exit(EXIT_FAILURE);
- }
- (void)futimens(t, ts);
+ if (fflush(NewCrontab) < 0)
+ err(EXIT_FAILURE, "%s", Filename);
+ if (futimens(t, ts) == -1)
+ warn("unable to set times on %s", Filename);
again:
rewind(NewCrontab);
if (ferror(NewCrontab)) {
- fprintf(stderr, "%s: error while writing new crontab to %s\n",
- __progname, Filename);
+ warnx("error writing new crontab to %s", Filename);
fatal:
unlink(Filename);
exit(EXIT_FAILURE);
@@ -367,20 +335,19 @@ edit_cmd(void)
}
if (fstat(t, &statbuf) < 0) {
- perror("fstat");
+ warn("fstat");
goto fatal;
}
if (timespeccmp(&ts[1], &statbuf.st_mtim, ==)) {
if (lstat(Filename, &xstatbuf) == 0 &&
statbuf.st_ino != xstatbuf.st_ino) {
- fprintf(stderr, "%s: crontab temp file moved, editor "
- "may create backup files improperly\n", __progname);
+ warnx("crontab temp file moved, editor "
+ "may create backup files improperly");
}
- fprintf(stderr, "%s: no changes made to crontab\n",
- __progname);
+ warnx("no changes made to crontab");
goto remove;
}
- fprintf(stderr, "%s: installing new crontab\n", __progname);
+ warnx("installing new crontab");
switch (replace_cmd()) {
case 0:
break;
@@ -407,12 +374,10 @@ edit_cmd(void)
/*NOTREACHED*/
case -2:
abandon:
- fprintf(stderr, "%s: edits left in %s\n",
- __progname, Filename);
+ warnx("edits left in %s", Filename);
goto done;
default:
- fprintf(stderr, "%s: panic: bad switch() in replace_cmd()\n",
- __progname);
+ warnx("panic: bad switch() in replace_cmd()");
goto fatal;
}
remove:
@@ -438,32 +403,30 @@ replace_cmd(void)
char **envp = env_init();
if (envp == NULL) {
- fprintf(stderr, "%s: Cannot allocate memory.\n", __progname);
+ warn(NULL); /* ENOMEM */
return (-2);
}
if (snprintf(TempFilename, sizeof TempFilename, "%s/tmp.XXXXXXXXX",
CRON_SPOOL) >= sizeof(TempFilename)) {
TempFilename[0] = '\0';
- fprintf(stderr, "path too long\n");
+ warnc(ENAMETOOLONG, "%s/tmp.XXXXXXXXX", CRON_SPOOL);
return (-2);
}
if (euid != pw->pw_uid) {
if (seteuid(pw->pw_uid) == -1) {
- fprintf(stderr, "%s: Unable to change uid to %u.\n",
- __progname, pw->pw_uid);
+ warn("unable to change uid to %u", pw->pw_uid);
return (-2);
}
}
fd = mkstemp(TempFilename);
if (euid != pw->pw_uid) {
if (seteuid(euid) == -1) {
- fprintf(stderr, "%s: Unable to change uid to %u.\n",
- __progname, euid);
+ warn("unable to change uid to %u", euid);
return (-2);
}
}
if (fd == -1 || !(tmp = fdopen(fd, "w+"))) {
- perror(TempFilename);
+ warn("%s", TempFilename);
if (fd != -1) {
close(fd);
unlink(TempFilename);
@@ -494,8 +457,7 @@ replace_cmd(void)
fflush(tmp); rewind(tmp);
if (ferror(tmp)) {
- fprintf(stderr, "%s: error while writing new crontab to %s\n",
- __progname, TempFilename);
+ warnx("error while writing new crontab to %s", TempFilename);
fclose(tmp);
error = -2;
goto done;
@@ -531,27 +493,25 @@ replace_cmd(void)
}
if (CheckErrorCount != 0) {
- fprintf(stderr, "errors in crontab file, can't install.\n");
+ warnx("errors in crontab file, unable to install");
fclose(tmp);
error = -1;
goto done;
}
if (fclose(tmp) == EOF) {
- perror("fclose");
+ warn("fclose");
error = -2;
goto done;
}
if (snprintf(n, sizeof n, "%s/%s", CRON_SPOOL, User) >= sizeof(n)) {
- fprintf(stderr, "path too long\n");
+ warnc(ENAMETOOLONG, "%s/%s", CRON_SPOOL, User);
error = -2;
goto done;
}
if (rename(TempFilename, n)) {
- fprintf(stderr, "%s: error renaming %s to %s\n",
- __progname, TempFilename, n);
- perror("rename");
+ warn("unable to rename %s to %s", TempFilename, n);
error = -2;
goto done;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 22:05:05 +0000