autofs/SOURCES/autofs-5.1.4-move-close-stdio-descriptors-to-become_daemon.patch

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2019-11-05 21:29:08 +00:00
autofs-5.1.4 - move close stdio descriptors to become_daemon()
From: Ian Kent <raven@themaw.net>
Move the stdio file descriptor close to the become_daemon() function
as closing these file descriptors, ie. detaching from ttys, is part
of the preperation for becoming a system daemon.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
daemon/automount.c | 27 ++++++++++++++++++++++++++-
include/log.h | 1 -
lib/log.c | 29 -----------------------------
4 files changed, 27 insertions(+), 31 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -42,6 +42,7 @@ xx/xx/2018 autofs-5.1.5
- add NULL check in prepare_attempt_prefix().
- update build info with systemd.
- use flags for startup boolean options.
+- move close stdio descriptors to become_daemon().
19/12/2017 autofs-5.1.4
- fix spec file url.
--- autofs-5.1.4.orig/daemon/automount.c
+++ autofs-5.1.4/daemon/automount.c
@@ -1218,6 +1218,8 @@ static void become_daemon(unsigned int f
}
log_to_stderr();
} else {
+ int nullfd;
+
if (open_pipe(start_pipefd) < 0) {
fprintf(stderr, "%s: failed to create start_pipefd.\n",
program);
@@ -1261,7 +1263,30 @@ static void become_daemon(unsigned int f
close(start_pipefd[1]);
exit(*pst_stat);
}
- log_to_syslog();
+
+ /* Redirect all our file descriptors to /dev/null */
+ nullfd = open("/dev/null", O_RDWR);
+ if (nullfd < 0) {
+ char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
+ fprintf(stderr, "cannot open /dev/null: %s", estr);
+ res = write(start_pipefd[1], pst_stat, sizeof(*pst_stat));
+ close(start_pipefd[1]);
+ exit(*pst_stat);
+ }
+
+ if (dup2(nullfd, STDIN_FILENO) < 0 ||
+ dup2(nullfd, STDOUT_FILENO) < 0 ||
+ dup2(nullfd, STDERR_FILENO) < 0) {
+ char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
+ fprintf(stderr,
+ "redirecting file descriptors failed: %s", estr);
+ res = write(start_pipefd[1], pst_stat, sizeof(*pst_stat));
+ close(start_pipefd[1]);
+ exit(*pst_stat);
+ }
+
+ open_log();
+ close(nullfd);
}
/* Write pid file if requested */
--- autofs-5.1.4.orig/include/log.h
+++ autofs-5.1.4/include/log.h
@@ -36,7 +36,6 @@ extern void set_log_debug_ap(struct auto
extern void set_mnt_logging(unsigned global_logopt);
extern void open_log(void);
-extern void log_to_syslog(void);
extern void log_to_stderr(void);
extern void log_info(unsigned int, const char* msg, ...);
--- autofs-5.1.4.orig/lib/log.c
+++ autofs-5.1.4/lib/log.c
@@ -314,35 +314,6 @@ void open_log(void)
return;
}
-void log_to_syslog(void)
-{
- char buf[MAX_ERR_BUF];
- int nullfd;
-
- open_log();
-
- /* Redirect all our file descriptors to /dev/null */
- nullfd = open("/dev/null", O_RDWR);
- if (nullfd < 0) {
- char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
- fprintf(stderr, "cannot open /dev/null: %s", estr);
- exit(1);
- }
-
- if (dup2(nullfd, STDIN_FILENO) < 0 ||
- dup2(nullfd, STDOUT_FILENO) < 0 ||
- dup2(nullfd, STDERR_FILENO) < 0) {
- char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
- fprintf(stderr,
- "redirecting file descriptors failed: %s", estr);
- exit(1);
- }
-
- close(nullfd);
-
- return;
-}
-
void log_to_stderr(void)
{
if (syslog_open) {