| 1 | /* Program name management. |
| 2 | Copyright (C) 2016-2020 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 <https://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 | #ifdef __sgi |
| 47 | # include <string.h> |
| 48 | # include <unistd.h> |
| 49 | # include <stdio.h> |
| 50 | # include <fcntl.h> |
| 51 | # include <sys/procfs.h> |
| 52 | #endif |
| 53 | |
| 54 | #include "dirname.h" |
| 55 | |
| 56 | #ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */ |
| 57 | char const * |
| 58 | getprogname (void) |
| 59 | { |
| 60 | # if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME /* glibc, BeOS */ |
| 61 | /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */ |
| 62 | return program_invocation_short_name; |
| 63 | # elif HAVE_DECL_PROGRAM_INVOCATION_NAME /* glibc, BeOS */ |
| 64 | /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */ |
| 65 | return last_component (program_invocation_name); |
| 66 | # elif HAVE_GETEXECNAME /* Solaris */ |
| 67 | /* https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */ |
| 68 | const char *p = getexecname (); |
| 69 | if (!p) |
| 70 | p = "?"; |
| 71 | return last_component (p); |
| 72 | # elif HAVE_DECL___ARGV /* mingw, MSVC */ |
| 73 | /* https://docs.microsoft.com/en-us/cpp/c-runtime-library/argc-argv-wargv */ |
| 74 | const char *p = __argv && __argv[0] ? __argv[0] : "?"; |
| 75 | return last_component (p); |
| 76 | # elif HAVE_VAR___PROGNAME /* OpenBSD, Android, QNX */ |
| 77 | /* https://man.openbsd.org/style.9 */ |
| 78 | /* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */ |
| 79 | /* Be careful to declare this only when we absolutely need it |
| 80 | (OpenBSD 5.1), rather than when it's available. Otherwise, |
| 81 | its mere declaration makes program_invocation_short_name |
| 82 | malfunction (have zero length) with Fedora 25's glibc. */ |
| 83 | extern char *__progname; |
| 84 | const char *p = __progname; |
| 85 | # if defined __ANDROID__ |
| 86 | return last_component (p); |
| 87 | # else |
| 88 | return p && p[0] ? p : "?"; |
| 89 | # endif |
| 90 | # elif _AIX /* AIX */ |
| 91 | /* Idea by Bastien ROUCARIÈS, |
| 92 | https://lists.gnu.org/r/bug-gnulib/2010-12/msg00095.html |
| 93 | Reference: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_61/com.ibm.aix.basetrf1/getprocs.htm |
| 94 | */ |
| 95 | static char *p; |
| 96 | static int first = 1; |
| 97 | if (first) |
| 98 | { |
| 99 | first = 0; |
| 100 | pid_t pid = getpid (); |
| 101 | struct procentry64 procs; |
| 102 | p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1) |
| 103 | ? strdup (procs.pi_comm) |
| 104 | : NULL); |
| 105 | if (!p) |
| 106 | p = "?"; |
| 107 | } |
| 108 | return p; |
| 109 | # elif defined __hpux |
| 110 | static char *p; |
| 111 | static int first = 1; |
| 112 | if (first) |
| 113 | { |
| 114 | first = 0; |
| 115 | pid_t pid = getpid (); |
| 116 | struct pst_status status; |
| 117 | if (pstat_getproc (&status, sizeof status, 0, pid) > 0) |
| 118 | { |
| 119 | char *ucomm = status.pst_ucomm; |
| 120 | char *cmd = status.pst_cmd; |
| 121 | if (strlen (ucomm) < PST_UCOMMLEN - 1) |
| 122 | p = ucomm; |
| 123 | else |
| 124 | { |
| 125 | /* ucomm is truncated to length PST_UCOMMLEN - 1. |
| 126 | Look at cmd instead. */ |
| 127 | char *space = strchr (cmd, ' '); |
| 128 | if (space != NULL) |
| 129 | *space = '\0'; |
| 130 | p = strrchr (cmd, '/'); |
| 131 | if (p != NULL) |
| 132 | p++; |
| 133 | else |
| 134 | p = cmd; |
| 135 | if (strlen (p) > PST_UCOMMLEN - 1 |
| 136 | && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0) |
| 137 | /* p is less truncated than ucomm. */ |
| 138 | ; |
| 139 | else |
| 140 | p = ucomm; |
| 141 | } |
| 142 | p = strdup (p); |
| 143 | } |
| 144 | else |
| 145 | { |
| 146 | # if !defined __LP64__ |
| 147 | /* Support for 32-bit programs running in 64-bit HP-UX. |
| 148 | The documented way to do this is to use the same source code |
| 149 | as above, but in a compilation unit where '#define _PSTAT64 1' |
| 150 | is in effect. I prefer a single compilation unit; the struct |
| 151 | size and the offsets are not going to change. */ |
| 152 | char status64[1216]; |
| 153 | if (__pstat_getproc64 (status64, sizeof status64, 0, pid) > 0) |
| 154 | { |
| 155 | char *ucomm = status64 + 288; |
| 156 | char *cmd = status64 + 168; |
| 157 | if (strlen (ucomm) < PST_UCOMMLEN - 1) |
| 158 | p = ucomm; |
| 159 | else |
| 160 | { |
| 161 | /* ucomm is truncated to length PST_UCOMMLEN - 1. |
| 162 | Look at cmd instead. */ |
| 163 | char *space = strchr (cmd, ' '); |
| 164 | if (space != NULL) |
| 165 | *space = '\0'; |
| 166 | p = strrchr (cmd, '/'); |
| 167 | if (p != NULL) |
| 168 | p++; |
| 169 | else |
| 170 | p = cmd; |
| 171 | if (strlen (p) > PST_UCOMMLEN - 1 |
| 172 | && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0) |
| 173 | /* p is less truncated than ucomm. */ |
| 174 | ; |
| 175 | else |
| 176 | p = ucomm; |
| 177 | } |
| 178 | p = strdup (p); |
| 179 | } |
| 180 | else |
| 181 | # endif |
| 182 | p = NULL; |
| 183 | } |
| 184 | if (!p) |
| 185 | p = "?"; |
| 186 | } |
| 187 | return p; |
| 188 | # elif __MVS__ /* z/OS */ |
| 189 | /* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */ |
| 190 | static char *p = "?"; |
| 191 | static int first = 1; |
| 192 | if (first) |
| 193 | { |
| 194 | pid_t pid = getpid (); |
| 195 | int token; |
| 196 | W_PSPROC buf; |
| 197 | first = 0; |
| 198 | memset (&buf, 0, sizeof(buf)); |
| 199 | buf.ps_cmdptr = (char *) malloc (buf.ps_cmdlen = PS_CMDBLEN_LONG); |
| 200 | buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN); |
| 201 | buf.ps_pathptr = (char *) malloc (buf.ps_pathlen = PS_PATHBLEN); |
| 202 | if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr) |
| 203 | { |
| 204 | for (token = 0; token >= 0; |
| 205 | token = w_getpsent (token, &buf, sizeof(buf))) |
| 206 | { |
| 207 | if (token > 0 && buf.ps_pid == pid) |
| 208 | { |
| 209 | char *s = strdup (last_component (buf.ps_pathptr)); |
| 210 | if (s) |
| 211 | p = s; |
| 212 | break; |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | free (buf.ps_cmdptr); |
| 217 | free (buf.ps_conttyptr); |
| 218 | free (buf.ps_pathptr); |
| 219 | } |
| 220 | return p; |
| 221 | # elif defined __sgi /* IRIX */ |
| 222 | char filename[50]; |
| 223 | int fd; |
| 224 | |
| 225 | sprintf (filename, "/proc/pinfo/%d", (int) getpid ()); |
| 226 | fd = open (filename, O_RDONLY); |
| 227 | if (0 <= fd) |
| 228 | { |
| 229 | prpsinfo_t buf; |
| 230 | int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf); |
| 231 | close (fd); |
| 232 | if (ioctl_ok) |
| 233 | { |
| 234 | char *name = buf.pr_fname; |
| 235 | size_t namesize = sizeof buf.pr_fname; |
| 236 | /* It may not be NUL-terminated. */ |
| 237 | char *namenul = memchr (name, '\0', namesize); |
| 238 | size_t namelen = namenul ? namenul - name : namesize; |
| 239 | char *namecopy = malloc (namelen + 1); |
| 240 | if (namecopy) |
| 241 | { |
| 242 | namecopy[namelen] = '\0'; |
| 243 | return memcpy (namecopy, name, namelen); |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | return NULL; |
| 248 | # else |
| 249 | # error "getprogname module not ported to this OS" |
| 250 | # endif |
| 251 | } |
| 252 | |
| 253 | #endif |
| 254 | |
| 255 | /* |
| 256 | * Hey Emacs! |
| 257 | * Local Variables: |
| 258 | * coding: utf-8 |
| 259 | * End: |
| 260 | */ |