--- /dev/null
+/* Program name management.
+ Copyright (C) 2016-2018 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include "getprogname.h"
+
+#include <errno.h> /* get program_invocation_name declaration */
+#include <stdlib.h> /* get __argv 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
+
+#ifdef __sgi
+# include <string.h>
+# include <unistd.h>
+# include <stdio.h>
+# include <fcntl.h>
+# include <sys/procfs.h>
+#endif
+
+#include "dirname.h"
+
+#ifndef HAVE_GETPROGNAME /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
+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://msdn.microsoft.com/en-us/library/dn727674.aspx */
+ const char *p = __argv && __argv[0] ? __argv[0] : "?";
+ return last_component (p);
+# elif HAVE_VAR___PROGNAME /* OpenBSD, 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;
+ return p && p[0] ? p : "?";
+# 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;
+ p = (0 < pstat_getproc (&status, sizeof status, 0, pid)
+ ? strdup (status.pst_ucomm)
+ : 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 /* IRIX */
+ char filename[50];
+ int fd;
+
+ sprintf (filename, "/proc/pinfo/%d", (int) getpid ());
+ fd = open (filename, O_RDONLY);
+ 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;
+ 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;
+# else
+# error "getprogname module not ported to this OS"
+# endif
+}
+
+#endif
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