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/*
* libexplain - a library of system-call-specific strerror replacements
* Copyright (C) 2011, 2012 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/limits.h> /* for PATH_MAX execpt Solaris */
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/sys/param.h> /* for PATH_MAX on Solaris */
#include <libexplain/ac/unistd.h>
#include <libexplain/fileinfo.h>
#include <libexplain/output.h>
#include <libexplain/program_name.h>
#include <libexplain/strtol.h>
#include <libexplain/version_print.h>
static int
getopt2(int argc, char **argv)
{
int c;
c = getopt(argc, argv, "cef:p:sV");
if (c < 0 && optind < argc)
{
optarg = argv[optind++];
return 'f';
}
return c;
}
static void
usage(void)
{
const char *prog;
prog = explain_program_name_get();
fprintf(stderr, "Usage: %s ( -s | -p<pid> )( -c | -e | -f<fd> )\n", prog);
fprintf(stderr, " %s -V\n", prog);
exit(EXIT_FAILURE);
}
static void
must_be_end_of_cmdline(int argc, char **argv)
{
if (getopt2(argc, argv) > 0)
usage();
if (optind < argc)
usage();
}
int
main(int argc, char **argv)
{
pid_t pid = 0;
switch (getopt2(argc, argv))
{
case 's':
/* self */
pid = getpid();
break;
case 'p':
pid = explain_strtol_or_die(optarg, 0, 0);
break;
case 'V':
must_be_end_of_cmdline(argc, argv);
explain_version_print();
return 0;
default:
usage();
}
switch (getopt2(argc, argv))
{
case 'c':
/* cwd */
{
char path[PATH_MAX + 1];
must_be_end_of_cmdline(argc, argv);
if (!explain_fileinfo_pid_cwd(pid, path, sizeof(path)))
{
explain_output_error_and_die
(
"unable to determine pid %ld cwd\n",
(long)pid
);
}
printf("%s\n", path);
}
break;
case 'e':
/* exe */
{
char path[PATH_MAX + 1];
must_be_end_of_cmdline(argc, argv);
if (!explain_fileinfo_pid_exe(pid, path, sizeof(path)))
{
explain_output_error_and_die
(
"unable to determine pid %ld exe\n",
(long)pid
);
}
printf("%s\n", path);
}
break;
case 'f':
{
int fildes;
char path[PATH_MAX + 1];
fildes = explain_strtol_or_die(optarg, 0, 0);
must_be_end_of_cmdline(argc, argv);
if (!explain_fileinfo_pid_fd_n(pid, fildes, path, sizeof(path)))
{
explain_output_error_and_die
(
"unable to determine pid %ld fildes %d\n",
(long)pid,
fildes
);
}
printf("%s\n", path);
}
break;
default:
usage();
}
return EXIT_SUCCESS;
}
/* vim: set ts=8 sw=4 et : */
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