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* Tools/gdnc.m (main): Close any open file descriptors so we can

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be a proper daemon.
Fixes #4938.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@17580 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Adam Fedor 2003-09-01 00:46:26 +00:00
parent 7bc03ea631
commit 560f02f25b
2 changed files with 109 additions and 1 deletions
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8
ChangeLog
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@ -1,6 +1,12 @@
2003-08-31 Adam Fedor <fedor@gnu.org>
* Tools/gdnc.m (main): Close any open file descriptors so we can
be a proper daemon.
Fixes #4938.
2003-08-29 Adam Fedor <fedor@gnu.org> 2003-08-29 Adam Fedor <fedor@gnu.org>
* config/procfs.m4: Disalbe procfs for solaris * config/procfs.m4: Disable procfs for solaris
2003-08-26 Adam Fedor <fedor@gnu.org> 2003-08-26 Adam Fedor <fedor@gnu.org>

102
Tools/gdnc.m
View file

@ -28,12 +28,77 @@
#include "process.h" #include "process.h"
#endif #endif
#include <fcntl.h>
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif
#include <signal.h> #include <signal.h>
#ifndef NSIG #ifndef NSIG
#define NSIG 32 #define NSIG 32
#endif #endif
static int is_daemon = 0; /* Currently running as daemon. */
static char ebuf[2048];
#ifdef HAVE_SYSLOG
static int log_priority;
static void
gdnc_log (int prio)
{
if (is_daemon)
{
syslog (log_priority | prio, ebuf);
}
else if (prio == LOG_INFO)
{
write (1, ebuf, strlen (ebuf));
write (1, "\n", 1);
}
else
{
write (2, ebuf, strlen (ebuf));
write (2, "\n", 1);
}
if (prio == LOG_CRIT)
{
if (is_daemon)
{
syslog (LOG_CRIT, "exiting.");
}
else
{
fprintf (stderr, "exiting.\n");
fflush (stderr);
}
exit(EXIT_FAILURE);
}
}
#else
#define LOG_CRIT 2
#define LOG_DEBUG 0
#define LOG_ERR 1
#define LOG_INFO 0
#define LOG_WARNING 0
void
gdnc_log (int prio)
{
write (2, ebuf, strlen (ebuf));
write (2, "\n", 1);
if (prio == LOG_CRIT)
{
fprintf (stderr, "exiting.\n");
fflush (stderr);
exit(EXIT_FAILURE);
}
}
#endif
static void static void
ihandler(int sig) ihandler(int sig)
{ {
@ -909,6 +974,7 @@ ihandler(int sig)
int int
main(int argc, char** argv, char** env) main(int argc, char** argv, char** env)
{ {
int c;
GDNCServer *server; GDNCServer *server;
NSString *str; NSString *str;
BOOL shouldFork = YES; BOOL shouldFork = YES;
@ -948,6 +1014,7 @@ main(int argc, char** argv, char** env)
#else #else
if (shouldFork) if (shouldFork)
{ {
is_daemon = 1;
switch (fork()) switch (fork())
{ {
case -1: case -1:
@ -971,6 +1038,41 @@ main(int argc, char** argv, char** env)
} }
#endif /* !MINGW */ #endif /* !MINGW */
/*
* Ensure we don't have any open file descriptors which may refer
* to sockets bound to ports we may try to use.
*
* Use '/dev/null' for stdin and stdout.
*/
for (c = 0; c < FD_SETSIZE; c++)
{
if (is_daemon || (c != 2))
{
(void)close(c);
}
}
if (open("/dev/null", O_RDONLY) != 0)
{
sprintf(ebuf, "failed to open stdin from /dev/null (%s)\n",
strerror(errno));
gdnc_log(LOG_CRIT);
exit(EXIT_FAILURE);
}
if (open("/dev/null", O_WRONLY) != 1)
{
sprintf(ebuf, "failed to open stdout from /dev/null (%s)\n",
strerror(errno));
gdnc_log(LOG_CRIT);
exit(EXIT_FAILURE);
}
if (is_daemon && open("/dev/null", O_WRONLY) != 2)
{
sprintf(ebuf, "failed to open stderr from /dev/null (%s)\n",
strerror(errno));
gdnc_log(LOG_CRIT);
exit(EXIT_FAILURE);
}
{ {
#if GS_WITH_GC == 0 #if GS_WITH_GC == 0
CREATE_AUTORELEASE_POOL(pool); CREATE_AUTORELEASE_POOL(pool);