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wget/lib/getprogname.c

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/* Program name management.
Copyright (C) 2016-2023 Free Software Foundation, Inc.
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. Also get __argv declaration. */
#include <stdlib.h>
#include <errno.h> /* get program_invocation_name declaration */
#ifdef _AIX
# include <unistd.h>
# include <procinfo.h>
# include <string.h>
#endif
#ifdef __MVS__
# ifndef _OPEN_SYS
# define _OPEN_SYS
# endif
# include <string.h>
# include <sys/ps.h>
#endif
#ifdef __hpux
# include <unistd.h>
# include <sys/param.h>
# include <sys/pstat.h>
# include <string.h>
#endif
#if defined __sgi || defined __osf__
# include <string.h>
# include <unistd.h>
# include <stdio.h>
# include <fcntl.h>
# include <sys/procfs.h>
#endif
#if defined __SCO_VERSION__ || defined __sysv5__
# include <fcntl.h>
# include <string.h>
#endif
#include "basename-lgpl.h"
#ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Solaris >= 11, Cygwin, Android API level >= 21 */
char const *
getprogname (void)
{
# if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME /* glibc, BeOS */
/* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
return program_invocation_short_name;
# elif HAVE_DECL_PROGRAM_INVOCATION_NAME /* glibc, BeOS */
/* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
return last_component (program_invocation_name);
# elif HAVE_GETEXECNAME /* Solaris */
/* https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */
const char *p = getexecname ();
if (!p)
p = "?";
return last_component (p);
# elif HAVE_DECL___ARGV /* mingw, MSVC */
/* https://docs.microsoft.com/en-us/cpp/c-runtime-library/argc-argv-wargv */
const char *p = __argv && __argv[0] ? __argv[0] : "?";
return last_component (p);
# elif HAVE_VAR___PROGNAME /* OpenBSD, Android, QNX */
/* https://man.openbsd.org/style.9 */
/* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */
/* Be careful to declare this only when we absolutely need it
(OpenBSD 5.1), rather than when it's available. Otherwise,
its mere declaration makes program_invocation_short_name
malfunction (have zero length) with Fedora 25's glibc. */
extern char *__progname;
const char *p = __progname;
# if defined __ANDROID__
return last_component (p);
# else
return p && p[0] ? p : "?";
# endif
# elif _AIX /* AIX */
/* Idea by Bastien ROUCARIÈS,
https://lists.gnu.org/r/bug-gnulib/2010-12/msg00095.html
Reference: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_61/com.ibm.aix.basetrf1/getprocs.htm
*/
static char *p;
static int first = 1;
if (first)
{
first = 0;
pid_t pid = getpid ();
struct procentry64 procs;
p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1)
? strdup (procs.pi_comm)
: NULL);
if (!p)
p = "?";
}
return p;
# elif defined __hpux
static char *p;
static int first = 1;
if (first)
{
first = 0;
pid_t pid = getpid ();
struct pst_status status;
if (pstat_getproc (&status, sizeof status, 0, pid) > 0)
{
char *ucomm = status.pst_ucomm;
char *cmd = status.pst_cmd;
if (strlen (ucomm) < PST_UCOMMLEN - 1)
p = ucomm;
else
{
/* ucomm is truncated to length PST_UCOMMLEN - 1.
Look at cmd instead. */
char *space = strchr (cmd, ' ');
if (space != NULL)
*space = '\0';
p = strrchr (cmd, '/');
if (p != NULL)
p++;
else
p = cmd;
if (strlen (p) > PST_UCOMMLEN - 1
&& memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
/* p is less truncated than ucomm. */
;
else
p = ucomm;
}
p = strdup (p);
}
else
{
# if !defined __LP64__
/* Support for 32-bit programs running in 64-bit HP-UX.
The documented way to do this is to use the same source code
as above, but in a compilation unit where '#define _PSTAT64 1'
is in effect. I prefer a single compilation unit; the struct
size and the offsets are not going to change. */
char status64[1216];
if (__pstat_getproc64 (status64, sizeof status64, 0, pid) > 0)
{
char *ucomm = status64 + 288;
char *cmd = status64 + 168;
if (strlen (ucomm) < PST_UCOMMLEN - 1)
p = ucomm;
else
{
/* ucomm is truncated to length PST_UCOMMLEN - 1.
Look at cmd instead. */
char *space = strchr (cmd, ' ');
if (space != NULL)
*space = '\0';
p = strrchr (cmd, '/');
if (p != NULL)
p++;
else
p = cmd;
if (strlen (p) > PST_UCOMMLEN - 1
&& memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
/* p is less truncated than ucomm. */
;
else
p = ucomm;
}
p = strdup (p);
}
else
# endif
p = NULL;
}
if (!p)
p = "?";
}
return p;
# elif __MVS__ /* z/OS */
/* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */
static char *p = "?";
static int first = 1;
if (first)
{
pid_t pid = getpid ();
int token;
W_PSPROC buf;
first = 0;
memset (&buf, 0, sizeof(buf));
buf.ps_cmdptr = (char *) malloc (buf.ps_cmdlen = PS_CMDBLEN_LONG);
buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN);
buf.ps_pathptr = (char *) malloc (buf.ps_pathlen = PS_PATHBLEN);
if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr)
{
for (token = 0; token >= 0;
token = w_getpsent (token, &buf, sizeof(buf)))
{
if (token > 0 && buf.ps_pid == pid)
{
char *s = strdup (last_component (buf.ps_pathptr));
if (s)
p = s;
break;
}
}
}
free (buf.ps_cmdptr);
free (buf.ps_conttyptr);
free (buf.ps_pathptr);
}
return p;
# elif defined __sgi || defined __osf__ /* IRIX or Tru64 */
char filename[50];
int fd;
# if defined __sgi
sprintf (filename, "/proc/pinfo/%d", (int) getpid ());
# else
sprintf (filename, "/proc/%d", (int) getpid ());
# endif
fd = open (filename, O_RDONLY | O_CLOEXEC);
if (0 <= fd)
{
prpsinfo_t buf;
int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
close (fd);
if (ioctl_ok)
{
char *name = buf.pr_fname;
size_t namesize = sizeof buf.pr_fname;
/* It may not be NUL-terminated. */
char *namenul = memchr (name, '\0', namesize);
size_t namelen = namenul ? namenul - name : namesize;
char *namecopy = malloc (namelen + 1);
if (namecopy)
{
namecopy[namelen] = '\0';
return memcpy (namecopy, name, namelen);
}
}
}
return NULL;
# elif defined __SCO_VERSION__ || defined __sysv5__ /* SCO OpenServer6/UnixWare */
char buf[80];
int fd;
sprintf (buf, "/proc/%d/cmdline", getpid());
fd = open (buf, O_RDONLY);
if (0 <= fd)
{
size_t n = read (fd, buf, 79);
if (n > 0)
{
buf[n] = '\0'; /* Guarantee null-termination */
char *progname;
progname = strrchr (buf, '/');
if (progname)
{
progname = progname + 1; /* Skip the '/' */
}
else
{
progname = buf;
}
char *ret;
ret = malloc (strlen (progname) + 1);
if (ret)
{
strcpy (ret, progname);
return ret;
}
}
close (fd);
}
return "?";
# else
# error "getprogname module not ported to this OS"
# endif
}
#endif
/*
* Hey Emacs!
* Local Variables:
* coding: utf-8
* End:
*/
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