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start_stop_daemon: NOMMU fixes, round 2 by Alex Landau <landau_alex@yahoo.com>

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dhcpc: fixed "ifupdown + udhcpc_without_pidpile_creation" bug
This commit is contained in:
Denis Vlasenko 2007-08-02 10:14:29 +00:00
parent fc77eb54e7
commit 1caca34aa6
5 changed files with 20 additions and 14 deletions
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18
debianutils/start_stop_daemon.c
View File

@ -14,6 +14,8 @@
#include <getopt.h>
#include <sys/resource.h>
/* Override ENABLE_FEATURE_PIDFILE */
#define WANT_PIDFILE 1
#include "libbb.h"
static int signal_nr = 15;
@ -46,7 +48,7 @@ static int pid_is_exec(pid_t pid, const char *name)
n = strcmp(execbuf, name);
if (ENABLE_FEATURE_CLEAN_UP)
free(execbuf);
return ~n; /* nonzero (true) if execbuf == name */
return !n; /* nonzero (true) if execbuf == name */
}
static int pid_is_user(int pid, int uid)
@ -301,10 +303,14 @@ int start_stop_daemon_main(int argc, char **argv)
pid_t pid = vfork();
if (pid < 0) /* error */
bb_perror_msg_and_die("vfork");
if (pid == 0) /* parent */
return 0;
if (pid != 0) {
/* parent */
/* why _exit? the child may have changed the stack,
* so "return 0" may do bad things */
_exit(0);
}
/* child */
setsid(); /* detach from controlling tty */
/* Redirect stdio to /dev/null, close extra FDs.
* We do not actually daemonize because of DAEMON_ONLY_SANITIZE */
bb_daemonize_or_rexec(
@ -316,11 +322,7 @@ int start_stop_daemon_main(int argc, char **argv)
}
if (opt & OPT_MAKEPID) {
/* user wants _us_ to make the pidfile */
FILE *pidf = xfopen(pidfile, "w");
pid_t pidt = getpid();
fprintf(pidf, "%d\n", pidt);
fclose(pidf);
write_pidfile(pidfile);
}
if (opt & OPT_c) {
struct bb_uidgid_t ugid;

5
include/libbb.h
View File

@ -619,8 +619,9 @@ llist_t *llist_rev(llist_t *list);
* llist_t *llist_add_to(llist_t *old_head, void *data)
* etc does not result in smaller code... */
#if ENABLE_FEATURE_PIDFILE
/* start_stop_daemon and (udhcpc with ifupdown) are special - they want to
* create pidfiles regardless of FEATURE_PIDFILE. */
#if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
int write_pidfile(const char *path);
#define remove_pidfile(f) ((void)unlink(f))
#else

5
libbb/pidfile.c
View File

@ -6,9 +6,11 @@
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* Override ENABLE_FEATURE_PIDFILE */
#define WANT_PIDFILE 1
#include "libbb.h"
#if ENABLE_FEATURE_PIDFILE
int write_pidfile(const char *path)
{
int pid_fd;
@ -26,4 +28,3 @@ int write_pidfile(const char *path)
close(pid_fd);
return 1;
}
#endif

2
networking/udhcp/dhcpc.c
View File

@ -11,6 +11,8 @@
#include <getopt.h>
#include <syslog.h>
/* Override ENABLE_FEATURE_PIDFILE - ifupdown needs our pidfile to always exist */
#define WANT_PIDFILE 1
#include "common.h"
#include "dhcpd.h"
#include "dhcpc.h"