1 /* Program name management.
2 Copyright (C) 2016-2017 Free Software Foundation, Inc.
3
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.
8
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.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 /* Specification. */
20 #include "getprogname.h"
21
22 #include <errno.h> /* get program_invocation_name declaration */
23 #include <stdlib.h> /* get __argv declaration */
24
25 #ifdef _AIX
26 # include <unistd.h>
27 # include <procinfo.h>
28 # include <string.h>
29 #endif
30
31 #ifdef __MVS__
32 # ifndef _OPEN_SYS
33 # define _OPEN_SYS
34 # endif
35 # include <string.h>
36 # include <sys/ps.h>
37 #endif
38
39 #ifdef __hpux
40 # include <unistd.h>
41 # include <sys/param.h>
42 # include <sys/pstat.h>
43 # include <string.h>
44 #endif
45
46 #include "dirname.h"
47
48 #ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
49 char const *
getprogname(void)50 getprogname (void)
51 {
52 # if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME /* glibc, BeOS */
53 /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
54 return program_invocation_short_name;
55 # elif HAVE_DECL_PROGRAM_INVOCATION_NAME /* glibc, BeOS */
56 /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
57 return last_component (program_invocation_name);
58 # elif HAVE_GETEXECNAME /* Solaris */
59 /* http://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */
60 const char *p = getexecname ();
61 if (!p)
62 p = "?";
63 return last_component (p);
64 # elif HAVE_DECL___ARGV /* mingw, MSVC */
65 /* https://msdn.microsoft.com/en-us/library/dn727674.aspx */
66 const char *p = __argv && __argv[0] ? __argv[0] : "?";
67 return last_component (p);
68 # elif HAVE_VAR___PROGNAME /* OpenBSD, QNX */
69 /* http://man.openbsd.org/style.9 */
70 /* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */
71 /* Be careful to declare this only when we absolutely need it
72 (OpenBSD 5.1), rather than when it's available. Otherwise,
73 its mere declaration makes program_invocation_short_name
74 malfunction (have zero length) with Fedora 25's glibc. */
75 extern char *__progname;
76 const char *p = __progname;
77 return p && p[0] ? p : "?";
78 # elif _AIX /* AIX */
79 /* Idea by Bastien ROUCARIÈS,
80 http://lists.gnu.org/archive/html/bug-gnulib/2010-12/msg00095.html
81 Reference: http://
82 ibm.biz/knowctr#ssw_aix_53/com.ibm.aix.basetechref/doc/basetrf1/getprocs.htm
83 */
84 static char *p;
85 static int first = 1;
86 if (first)
87 {
88 first = 0;
89 pid_t pid = getpid ();
90 struct procentry64 procs;
91 p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1)
92 ? strdup (procs.pi_comm)
93 : NULL);
94 if (!p)
95 p = "?";
96 }
97 return p;
98 # elif defined __hpux
99 static char *p;
100 static int first = 1;
101 if (first)
102 {
103 first = 0;
104 pid_t pid = getpid ();
105 struct pst_status status;
106 p = (0 < pstat_getproc (&status, sizeof status, 0, pid)
107 ? strdup (status.pst_ucomm)
108 : NULL);
109 if (!p)
110 p = "?";
111 }
112 return p;
113 # elif __MVS__ /* z/OS */
114 /* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */
115 static char *p = "?";
116 static int first = 1;
117 if (first)
118 {
119 pid_t pid = getpid ();
120 int token;
121 W_PSPROC buf;
122 first = 0;
123 memset (&buf, 0, sizeof(buf));
124 buf.ps_cmdptr = (char *) malloc (buf.ps_cmdlen = PS_CMDBLEN_LONG);
125 buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN);
126 buf.ps_pathptr = (char *) malloc (buf.ps_pathlen = PS_PATHBLEN);
127 if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr)
128 {
129 for (token = 0; token >= 0;
130 token = w_getpsent (token, &buf, sizeof(buf)))
131 {
132 if (token > 0 && buf.ps_pid == pid)
133 {
134 char *s = strdup (last_component (buf.ps_pathptr));
135 if (s)
136 p = s;
137 break;
138 }
139 }
140 }
141 free (buf.ps_cmdptr);
142 free (buf.ps_conttyptr);
143 free (buf.ps_pathptr);
144 }
145 return p;
146 # else
147 # error "getprogname module not ported to this OS"
148 # endif
149 }
150
151 #endif
152