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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2011 Peter Miller
*
* 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 Lesser
* 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 <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/errno.h>
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/ac/sys/shm.h>
#include <libexplain/buffer/shmctl_command.h>
#include <libexplain/buffer/shmid_ds.h>
#include <libexplain/buffer/shm_info.h>
#include <libexplain/buffer/shminfo.h>
#include <libexplain/output.h>
#include <libexplain/shmctl.h>
#include <libexplain/string_buffer.h>
#include <libexplain/string_to_thing.h>
#include <libexplain/version_print.h>
#include <libexplain/wrap_and_print.h>
static void
usage(void)
{
fprintf(stderr, "Usage: test_shmctl <shmid> <command> <data>\n");
fprintf(stderr, " test_shmctl -V\n");
exit(EXIT_FAILURE);
}
static void
print_shm_info(const struct shm_info *data)
{
char result[2000];
explain_string_buffer_t result_sb;
explain_string_buffer_init(&result_sb, result, sizeof(result));
explain_buffer_shm_info(&result_sb, data);
explain_wrap_and_print(stdout, result);
}
static void
print_shminfo(const struct shminfo *data)
{
char result[2000];
explain_string_buffer_t result_sb;
explain_string_buffer_init(&result_sb, result, sizeof(result));
explain_buffer_shminfo(&result_sb, data);
explain_wrap_and_print(stdout, result);
}
static void
print_shmid_ds(int shmid, const struct shmid_ds *data)
{
char result[2000];
explain_string_buffer_t result_sb;
explain_string_buffer_init(&result_sb, result, sizeof(result));
if (shmid >= 0)
explain_string_buffer_printf(&result_sb, "shmid = %d, ", shmid);
explain_buffer_shmid_ds(&result_sb, data, 1);
explain_wrap_and_print(stdout, result);
}
static void
list(void)
{
struct shminfo shminfo;
struct shm_info shm_info;
int maxid;
int id;
maxid = explain_shmctl_or_die(0, SHM_INFO, (void *)&shm_info);
print_shm_info(&shm_info);
explain_shmctl_or_die(0, IPC_INFO, (void *)&shminfo);
print_shminfo(&shminfo);
for (id = 0; id < maxid; ++id)
{
int shmid;
struct shmid_ds shmseg;
shmid = shmctl(id, SHM_STAT, &shmseg);
if (shmid < 0)
{
if (errno != EINVAL && errno != EIDRM)
{
explain_output_error_and_die
(
"%s",
explain_shmctl(id, SHM_STAT, &shmseg)
);
}
continue;
}
print_shmid_ds(shmid, &shmseg);
}
}
int
main(int argc, char **argv)
{
int shmid;
int command;
struct shmid_ds *data;
union dummy_t
{
int u0;
#ifdef HAVE_SYS_SHM_H
struct shmid_ds u1;
#endif
#ifdef SHM_INFO
struct shm_info u2;
#endif
#ifdef IPC_INFO
struct shminfo u3;
#endif
};
union dummy_t dummy;
data = (void *)&dummy;
for (;;)
{
int c = getopt(argc, argv, "lV");
if (c == EOF)
break;
switch (c)
{
case 'l':
/* list everything */
list();
return 0;
case 'V':
explain_version_print();
return EXIT_SUCCESS;
default:
usage();
}
}
switch (argc - optind)
{
default:
usage();
case 3:
data = explain_string_to_pointer(argv[optind + 2]);
case 2:
command =
explain_parse_shmctl_command_or_die(argv[optind + 1], "arg 1");
shmid = explain_string_to_int(argv[optind]);
break;
}
explain_shmctl_or_die(shmid, command, data);
if (data == (void *)&dummy)
{
switch (command)
{
#ifdef IPC_STAT
case IPC_STAT:
#endif
#ifdef SHM_STAT
case SHM_STAT:
#endif
print_shmid_ds(-1, data);
break;
#ifdef IPC_INFO
case IPC_INFO:
print_shminfo((void *)data);
break;
#endif
#ifdef SHM_INFO
case SHM_INFO:
print_shm_info((void *)data);
break;
#endif
default:
break;
}
}
return EXIT_SUCCESS;
}
/* vim: set ts=8 sw=4 et */
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