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/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#include <avahi-common/malloc.h>
#include "setproctitle.h"
#if !defined(HAVE_SETPROCTITLE) && defined(__linux__)
static char** argv_buffer = NULL;
static size_t argv_size = 0;
#if !HAVE_DECL_ENVIRON
extern char **environ;
#endif
#endif
void avahi_init_proc_title(int argc, char **argv) {
#if !defined(HAVE_SETPROCTITLE) && defined(__linux__)
unsigned i;
char **new_environ, *endptr;
/* This code is really really ugly. We make some memory layout
* assumptions and reuse the environment array as memory to store
* our process title in */
for (i = 0; environ[i]; i++);
endptr = i ? environ[i-1] + strlen(environ[i-1]) : argv[argc-1] + strlen(argv[argc-1]);
argv_buffer = argv;
argv_size = endptr - argv_buffer[0];
/* Make a copy of environ */
new_environ = avahi_malloc(sizeof(char*) * (i + 1));
for (i = 0; environ[i]; i++)
new_environ[i] = avahi_strdup(environ[i]);
new_environ[i] = NULL;
environ = new_environ;
#endif
}
void avahi_set_proc_title(const char *name, const char *fmt,...) {
#ifdef HAVE_SETPROCTITLE
char t[256];
va_list ap;
va_start(ap, fmt);
vsnprintf(t, sizeof(t), fmt, ap);
va_end(ap);
setproctitle("-%s", t);
#elif defined(__linux__)
size_t l;
va_list ap;
if (!argv_buffer)
return;
va_start(ap, fmt);
vsnprintf(argv_buffer[0], argv_size, fmt, ap);
va_end(ap);
l = strlen(argv_buffer[0]);
memset(argv_buffer[0] + l, 0, argv_size - l);
argv_buffer[1] = NULL;
#endif
#if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_NAME)
if (name)
prctl(PR_SET_NAME, (unsigned long) name, 0, 0, 0);
#endif
}
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