1 /* Program name management.
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
20 #include "getprogname.h"
22 #include <errno.h> /* get program_invocation_name declaration */
23 #include <stdlib.h> /* get __argv declaration */
27 # include <procinfo.h>
41 # include <sys/param.h>
42 # include <sys/pstat.h>
46 #if defined __sgi || defined __osf__
51 # include <sys/procfs.h>
54 #if defined __SCO_VERSION__ || defined __sysv5__
60 #include "basename-lgpl.h"
62 #ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
66 # if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME /* glibc, BeOS */
67 /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
68 return program_invocation_short_name;
69 # elif HAVE_DECL_PROGRAM_INVOCATION_NAME /* glibc, BeOS */
70 /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
71 return last_component (program_invocation_name);
72 # elif HAVE_GETEXECNAME /* Solaris */
73 /* https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */
74 const char *p = getexecname ();
77 return last_component (p);
78 # elif HAVE_DECL___ARGV /* mingw, MSVC */
79 /* https://docs.microsoft.com/en-us/cpp/c-runtime-library/argc-argv-wargv */
80 const char *p = __argv && __argv[0] ? __argv[0] : "?";
81 return last_component (p);
82 # elif HAVE_VAR___PROGNAME /* OpenBSD, Android, QNX */
83 /* https://man.openbsd.org/style.9 */
84 /* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */
85 /* Be careful to declare this only when we absolutely need it
86 (OpenBSD 5.1), rather than when it's available. Otherwise,
87 its mere declaration makes program_invocation_short_name
88 malfunction (have zero length) with Fedora 25's glibc. */
89 extern char *__progname;
90 const char *p = __progname;
91 # if defined __ANDROID__
92 return last_component (p);
94 return p && p[0] ? p : "?";
97 /* Idea by Bastien ROUCARIÈS,
98 https://lists.gnu.org/r/bug-gnulib/2010-12/msg00095.html
99 Reference: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_61/com.ibm.aix.basetrf1/getprocs.htm
102 static int first = 1;
106 pid_t pid = getpid ();
107 struct procentry64 procs;
108 p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1)
109 ? strdup (procs.pi_comm)
115 # elif defined __hpux
117 static int first = 1;
121 pid_t pid = getpid ();
122 struct pst_status status;
123 if (pstat_getproc (&status, sizeof status, 0, pid) > 0)
125 char *ucomm = status.pst_ucomm;
126 char *cmd = status.pst_cmd;
127 if (strlen (ucomm) < PST_UCOMMLEN - 1)
131 /* ucomm is truncated to length PST_UCOMMLEN - 1.
132 Look at cmd instead. */
133 char *space = strchr (cmd, ' ');
136 p = strrchr (cmd, '/');
141 if (strlen (p) > PST_UCOMMLEN - 1
142 && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
143 /* p is less truncated than ucomm. */
152 # if !defined __LP64__
153 /* Support for 32-bit programs running in 64-bit HP-UX.
154 The documented way to do this is to use the same source code
155 as above, but in a compilation unit where '#define _PSTAT64 1'
156 is in effect. I prefer a single compilation unit; the struct
157 size and the offsets are not going to change. */
159 if (__pstat_getproc64 (status64, sizeof status64, 0, pid) > 0)
161 char *ucomm = status64 + 288;
162 char *cmd = status64 + 168;
163 if (strlen (ucomm) < PST_UCOMMLEN - 1)
167 /* ucomm is truncated to length PST_UCOMMLEN - 1.
168 Look at cmd instead. */
169 char *space = strchr (cmd, ' ');
172 p = strrchr (cmd, '/');
177 if (strlen (p) > PST_UCOMMLEN - 1
178 && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
179 /* p is less truncated than ucomm. */
194 # elif __MVS__ /* z/OS */
195 /* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */
196 static char *p = "?";
197 static int first = 1;
200 pid_t pid = getpid ();
204 memset (&buf, 0, sizeof(buf));
205 buf.ps_cmdptr = (char *) malloc (buf.ps_cmdlen = PS_CMDBLEN_LONG);
206 buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN);
207 buf.ps_pathptr = (char *) malloc (buf.ps_pathlen = PS_PATHBLEN);
208 if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr)
210 for (token = 0; token >= 0;
211 token = w_getpsent (token, &buf, sizeof(buf)))
213 if (token > 0 && buf.ps_pid == pid)
215 char *s = strdup (last_component (buf.ps_pathptr));
222 free (buf.ps_cmdptr);
223 free (buf.ps_conttyptr);
224 free (buf.ps_pathptr);
227 # elif defined __sgi || defined __osf__ /* IRIX or Tru64 */
232 sprintf (filename, "/proc/pinfo/%d", (int) getpid ());
234 sprintf (filename, "/proc/%d", (int) getpid ());
236 fd = open (filename, O_RDONLY | O_CLOEXEC);
240 int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
244 char *name = buf.pr_fname;
245 size_t namesize = sizeof buf.pr_fname;
246 /* It may not be NUL-terminated. */
247 char *namenul = memchr (name, '\0', namesize);
248 size_t namelen = namenul ? namenul - name : namesize;
249 char *namecopy = malloc (namelen + 1);
252 namecopy[namelen] = '\0';
253 return memcpy (namecopy, name, namelen);
258 # elif defined __SCO_VERSION__ || defined __sysv5__ /* SCO OpenServer6/UnixWare */
261 sprintf (buf, "/proc/%d/cmdline", getpid());
262 fd = open (buf, O_RDONLY);
265 size_t n = read (fd, buf, 79);
268 buf[n] = '\0'; /* Guarantee null-termination */
270 progname = strrchr (buf, '/');
273 progname = progname + 1; /* Skip the '/' */
280 ret = malloc (strlen (progname) + 1);
283 strcpy (ret, progname);
291 # error "getprogname module not ported to this OS"