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Diffstat (limited to 'miscutils/crontab.c')
-rw-r--r--miscutils/crontab.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/miscutils/crontab.c b/miscutils/crontab.c
index dc3179dac..38933cf4a 100644
--- a/miscutils/crontab.c
+++ b/miscutils/crontab.c
@@ -93,6 +93,7 @@ int crontab_main(int argc ATTRIBUTE_UNUSED, char **argv)
char *new_fname;
char *user_name; /* -u USER */
int fd;
+ int src_fd;
int opt_ler;
/* file [opts] Replace crontab from file
@@ -144,15 +145,15 @@ int crontab_main(int argc ATTRIBUTE_UNUSED, char **argv)
bb_show_usage();
/* Read replacement file under user's UID/GID/group vector */
+ src_fd = STDIN_FILENO;
if (!opt_ler) { /* Replace? */
if (!argv[0])
bb_show_usage();
if (NOT_LONE_DASH(argv[0])) {
- fd = open_as_user(pas, argv[0]);
- if (fd < 0)
+ src_fd = open_as_user(pas, argv[0]);
+ if (src_fd < 0)
bb_error_msg_and_die("user %s cannot read %s",
pas->pw_name, argv[0]);
- xmove_fd(fd, STDIN_FILENO);
}
}
@@ -180,23 +181,23 @@ int crontab_main(int argc ATTRIBUTE_UNUSED, char **argv)
tmp_fname = xasprintf("%s.%u", crontab_dir, (unsigned)getpid());
/* No O_EXCL: we don't want to be stuck if earlier crontabs
* were killed, leaving stale temp file behind */
- fd = xopen3(tmp_fname, O_RDWR|O_CREAT|O_TRUNC, 0600);
- xmove_fd(fd, STDIN_FILENO);
- fchown(STDIN_FILENO, pas->pw_uid, pas->pw_gid);
+ src_fd = xopen3(tmp_fname, O_RDWR|O_CREAT|O_TRUNC, 0600);
+ fchown(src_fd, pas->pw_uid, pas->pw_gid);
fd = open(pas->pw_name, O_RDONLY);
if (fd >= 0) {
- bb_copyfd_eof(fd, STDIN_FILENO);
+ bb_copyfd_eof(fd, src_fd);
close(fd);
+ xlseek(src_fd, 0, SEEK_SET);
}
+ close_on_exec_on(src_fd); /* don't want editor to see this fd */
edit_file(pas, tmp_fname);
- xlseek(STDIN_FILENO, 0, SEEK_SET);
/* fall through */
case 0: /* Replace (no -l, -e, or -r were given) */
new_fname = xasprintf("%s.new", pas->pw_name);
fd = open(new_fname, O_WRONLY|O_CREAT|O_TRUNC|O_APPEND, 0600);
if (fd >= 0) {
- bb_copyfd_eof(STDIN_FILENO, fd);
+ bb_copyfd_eof(src_fd, fd);
close(fd);
xrename(new_fname, pas->pw_name);
} else {