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/*
* libdpkg - Debian packaging suite library routines
* progname.c - program name handling functions
*
* Copyright © 2011 Guillem Jover <guillem@debian.org>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#ifdef HAVE_GETPROCS64
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <procinfo.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <dpkg/path.h>
#include <dpkg/progname.h>
static const char *progname;
/**
* Set the program name.
*
* This function will set the program name which will be used by error
* reporting functions, among others.
*
* @param name The new program name.
*/
void
dpkg_set_progname(const char *name)
{
progname = path_basename(name);
}
#if defined(HAVE___PROGNAME)
extern const char *__progname;
#endif
/**
* Get the program name.
*
* The program name might have been set previously by dpkg_set_progname(),
* but if not this function will try to initialize it by system dependent
* means, so it's half safe to not call dpkg_set_progname() at all. At worst
* the function might return NULL in that case.
*
* @return A pointer to a static buffer with the program name.
*/
const char *
dpkg_get_progname(void)
{
if (progname == NULL) {
#if defined(HAVE_PROGRAM_INVOCATION_SHORT_NAME)
progname = program_invocation_short_name;
#elif defined(HAVE___PROGNAME)
progname = __progname;
#elif defined(HAVE_GETPROGNAME)
progname = getprogname();
#elif defined(HAVE_GETEXECNAME)
/* getexecname(3) returns an absolute path, normalize it. */
dpkg_set_progname(getexecname());
#elif defined(HAVE_GETPROCS64)
struct procentry64 pe;
pid_t pid = getpid();
if (getprocs64(&pe, sizeof(pe), NULL, 0, &pid, 1) >= 0)
progname = strdup(pe.pi_comm);
#endif
}
return progname;
}
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