303 lines
9.2 KiB
C
303 lines
9.2 KiB
C
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/* Program name management.
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Copyright (C) 2016-2023 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include "getprogname.h"
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#include <errno.h> /* get program_invocation_name declaration */
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#include <stdlib.h> /* get __argv declaration */
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#ifdef _AIX
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# include <unistd.h>
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# include <procinfo.h>
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# include <string.h>
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#endif
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#ifdef __MVS__
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# ifndef _OPEN_SYS
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# define _OPEN_SYS
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# endif
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# include <string.h>
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# include <sys/ps.h>
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#endif
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#ifdef __hpux
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# include <unistd.h>
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# include <sys/param.h>
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# include <sys/pstat.h>
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# include <string.h>
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#endif
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#if defined __sgi || defined __osf__
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# include <string.h>
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# include <unistd.h>
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# include <stdio.h>
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# include <fcntl.h>
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# include <sys/procfs.h>
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#endif
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#if defined __SCO_VERSION__ || defined __sysv5__
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# include <fcntl.h>
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# include <stdlib.h>
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# include <string.h>
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#endif
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#include "basename-lgpl.h"
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#ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
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char const *
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getprogname (void)
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{
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# if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME /* glibc, BeOS */
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/* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
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return program_invocation_short_name;
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# elif HAVE_DECL_PROGRAM_INVOCATION_NAME /* glibc, BeOS */
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/* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
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return last_component (program_invocation_name);
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# elif HAVE_GETEXECNAME /* Solaris */
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/* https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */
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const char *p = getexecname ();
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if (!p)
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p = "?";
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return last_component (p);
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# elif HAVE_DECL___ARGV /* mingw, MSVC */
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/* https://docs.microsoft.com/en-us/cpp/c-runtime-library/argc-argv-wargv */
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const char *p = __argv && __argv[0] ? __argv[0] : "?";
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return last_component (p);
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# elif HAVE_VAR___PROGNAME /* OpenBSD, Android, QNX */
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/* https://man.openbsd.org/style.9 */
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/* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */
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/* Be careful to declare this only when we absolutely need it
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(OpenBSD 5.1), rather than when it's available. Otherwise,
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its mere declaration makes program_invocation_short_name
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malfunction (have zero length) with Fedora 25's glibc. */
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extern char *__progname;
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const char *p = __progname;
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# if defined __ANDROID__
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return last_component (p);
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# else
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return p && p[0] ? p : "?";
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# endif
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# elif _AIX /* AIX */
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/* Idea by Bastien ROUCARIÈS,
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https://lists.gnu.org/r/bug-gnulib/2010-12/msg00095.html
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Reference: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_61/com.ibm.aix.basetrf1/getprocs.htm
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*/
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static char *p;
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static int first = 1;
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if (first)
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{
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first = 0;
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pid_t pid = getpid ();
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struct procentry64 procs;
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p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1)
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? strdup (procs.pi_comm)
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: NULL);
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if (!p)
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p = "?";
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}
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return p;
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# elif defined __hpux
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static char *p;
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static int first = 1;
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if (first)
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{
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first = 0;
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pid_t pid = getpid ();
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struct pst_status status;
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if (pstat_getproc (&status, sizeof status, 0, pid) > 0)
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{
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char *ucomm = status.pst_ucomm;
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char *cmd = status.pst_cmd;
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if (strlen (ucomm) < PST_UCOMMLEN - 1)
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p = ucomm;
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else
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{
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/* ucomm is truncated to length PST_UCOMMLEN - 1.
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Look at cmd instead. */
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char *space = strchr (cmd, ' ');
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if (space != NULL)
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*space = '\0';
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p = strrchr (cmd, '/');
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if (p != NULL)
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p++;
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else
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p = cmd;
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if (strlen (p) > PST_UCOMMLEN - 1
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&& memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
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/* p is less truncated than ucomm. */
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;
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else
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p = ucomm;
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}
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p = strdup (p);
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}
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else
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{
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# if !defined __LP64__
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/* Support for 32-bit programs running in 64-bit HP-UX.
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The documented way to do this is to use the same source code
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as above, but in a compilation unit where '#define _PSTAT64 1'
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is in effect. I prefer a single compilation unit; the struct
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size and the offsets are not going to change. */
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char status64[1216];
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if (__pstat_getproc64 (status64, sizeof status64, 0, pid) > 0)
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{
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char *ucomm = status64 + 288;
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char *cmd = status64 + 168;
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if (strlen (ucomm) < PST_UCOMMLEN - 1)
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p = ucomm;
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else
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{
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/* ucomm is truncated to length PST_UCOMMLEN - 1.
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Look at cmd instead. */
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char *space = strchr (cmd, ' ');
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if (space != NULL)
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*space = '\0';
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p = strrchr (cmd, '/');
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if (p != NULL)
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p++;
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else
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p = cmd;
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if (strlen (p) > PST_UCOMMLEN - 1
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&& memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
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/* p is less truncated than ucomm. */
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;
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else
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p = ucomm;
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}
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p = strdup (p);
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}
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else
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# endif
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p = NULL;
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}
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if (!p)
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p = "?";
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}
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return p;
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# elif __MVS__ /* z/OS */
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/* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */
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static char *p = "?";
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static int first = 1;
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if (first)
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{
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pid_t pid = getpid ();
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int token;
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W_PSPROC buf;
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first = 0;
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memset (&buf, 0, sizeof(buf));
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buf.ps_cmdptr = (char *) malloc (buf.ps_cmdlen = PS_CMDBLEN_LONG);
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buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN);
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buf.ps_pathptr = (char *) malloc (buf.ps_pathlen = PS_PATHBLEN);
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if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr)
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{
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for (token = 0; token >= 0;
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token = w_getpsent (token, &buf, sizeof(buf)))
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{
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if (token > 0 && buf.ps_pid == pid)
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{
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char *s = strdup (last_component (buf.ps_pathptr));
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if (s)
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p = s;
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break;
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}
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}
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}
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free (buf.ps_cmdptr);
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free (buf.ps_conttyptr);
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free (buf.ps_pathptr);
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}
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return p;
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# elif defined __sgi || defined __osf__ /* IRIX or Tru64 */
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char filename[50];
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int fd;
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# if defined __sgi
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sprintf (filename, "/proc/pinfo/%d", (int) getpid ());
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# else
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sprintf (filename, "/proc/%d", (int) getpid ());
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# endif
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fd = open (filename, O_RDONLY | O_CLOEXEC);
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if (0 <= fd)
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{
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prpsinfo_t buf;
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int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
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close (fd);
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if (ioctl_ok)
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{
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char *name = buf.pr_fname;
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size_t namesize = sizeof buf.pr_fname;
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/* It may not be NUL-terminated. */
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char *namenul = memchr (name, '\0', namesize);
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size_t namelen = namenul ? namenul - name : namesize;
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char *namecopy = malloc (namelen + 1);
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if (namecopy)
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{
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namecopy[namelen] = '\0';
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return memcpy (namecopy, name, namelen);
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}
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}
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}
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return NULL;
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# elif defined __SCO_VERSION__ || defined __sysv5__ /* SCO OpenServer6/UnixWare */
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char buf[80];
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int fd;
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sprintf (buf, "/proc/%d/cmdline", getpid());
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fd = open (buf, O_RDONLY);
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if (0 <= fd)
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{
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size_t n = read (fd, buf, 79);
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if (n > 0)
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{
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buf[n] = '\0'; /* Guarantee null-termination */
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char *progname;
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progname = strrchr (buf, '/');
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if (progname)
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{
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progname = progname + 1; /* Skip the '/' */
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}
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else
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{
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progname = buf;
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}
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char *ret;
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ret = malloc (strlen (progname) + 1);
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if (ret)
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{
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strcpy (ret, progname);
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return ret;
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}
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}
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close (fd);
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}
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return "?";
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# else
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# error "getprogname module not ported to this OS"
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# endif
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}
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#endif
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/*
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* Hey Emacs!
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* Local Variables:
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* coding: utf-8
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* End:
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*/
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