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weechat/src/core/core-sys.c
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/*
* SPDX-FileCopyrightText: 2023-2026 Sébastien Helleu <flashcode@flashtux.org>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This file is part of WeeChat, the extensible chat client.
*
* WeeChat 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.
*
* WeeChat 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 WeeChat. If not, see <https://www.gnu.org/licenses/>.
*/
/* System actions */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include <sys/wait.h>
#include "weechat.h"
#include "core-config.h"
#include "core-log.h"
#include "core-string.h"
#include "core-sys.h"
#include "core-util.h"
#include "../gui/gui-chat.h"
#include "../gui/gui-window.h"
#include "../plugins/plugin.h"
#ifdef HAVE_SYS_RESOURCE_H
struct t_rlimit_resource rlimit_resource[] =
{
#ifdef RLIMIT_AS
{ "as", RLIMIT_AS },
#endif
#ifdef RLIMIT_CORE
{ "core", RLIMIT_CORE },
#endif
#ifdef RLIMIT_CPU
{ "cpu", RLIMIT_CPU },
#endif
#ifdef RLIMIT_DATA
{ "data", RLIMIT_DATA },
#endif
#ifdef RLIMIT_FSIZE
{ "fsize", RLIMIT_FSIZE },
#endif
#ifdef RLIMIT_LOCKS
{ "locks", RLIMIT_LOCKS },
#endif
#ifdef RLIMIT_MEMLOCK
{ "memlock", RLIMIT_MEMLOCK },
#endif
#ifdef RLIMIT_MSGQUEUE
{ "msgqueue", RLIMIT_MSGQUEUE },
#endif
#ifdef RLIMIT_NICE
{ "nice", RLIMIT_NICE },
#endif
#ifdef RLIMIT_NOFILE
{ "nofile", RLIMIT_NOFILE },
#endif
#ifdef RLIMIT_NPROC
{ "nproc", RLIMIT_NPROC },
#endif
#ifdef RLIMIT_RSS
{ "rss", RLIMIT_RSS },
#endif
#ifdef RLIMIT_RTPRIO
{ "rtprio", RLIMIT_RTPRIO },
#endif
#ifdef RLIMIT_RTTIME
{ "rttime", RLIMIT_RTTIME },
#endif
#ifdef RLIMIT_SIGPENDING
{ "sigpending", RLIMIT_SIGPENDING },
#endif
#ifdef RLIMIT_STACK
{ "stack", RLIMIT_STACK },
#endif
{ NULL, 0 },
};
#endif /* HAVE_SYS_RESOURCE_H */
/*
* Set resource limit.
*/
#ifdef HAVE_SYS_RESOURCE_H
void
sys_setrlimit_resource (const char *resource_name, long long limit)
{
int i;
struct rlimit rlim;
char str_limit[64];
if (!resource_name)
return;
if (limit == -1)
snprintf (str_limit, sizeof (str_limit), "unlimited");
else
snprintf (str_limit, sizeof (str_limit), "%lld", limit);
for (i = 0; rlimit_resource[i].name; i++)
{
if (strcmp (rlimit_resource[i].name, resource_name) == 0)
{
if (limit < -1)
{
gui_chat_printf (NULL,
_("%sInvalid limit for resource \"%s\": %s "
"(must be >= -1)"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
resource_name, str_limit);
return;
}
rlim.rlim_cur = (limit >= 0) ? (rlim_t)limit : RLIM_INFINITY;
rlim.rlim_max = rlim.rlim_cur;
if (setrlimit (rlimit_resource[i].resource, &rlim) == 0)
{
log_printf (_("Limit for resource \"%s\" has been set to %s"),
resource_name, str_limit);
if (gui_init_ok)
{
gui_chat_printf (NULL,
_("Limit for resource \"%s\" has been set "
"to %s"),
resource_name, str_limit);
}
}
else
{
gui_chat_printf (NULL,
_("%sUnable to set resource limit \"%s\" to "
"%s: error %d %s"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
resource_name,
str_limit,
errno,
strerror (errno));
}
return;
}
}
gui_chat_printf (NULL,
_("%sUnknown resource limit \"%s\" (see /help "
"weechat.startup.sys_rlimit)"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
resource_name);
}
#endif /* HAVE_SYS_RESOURCE_H */
/*
* Set resource limits using value of option "weechat.startup.sys_rlimit".
*/
void
sys_setrlimit (void)
{
#ifdef HAVE_SYS_RESOURCE_H
char **items, *pos;
int num_items, i;
long long number;
items = string_split (CONFIG_STRING(config_startup_sys_rlimit), ",", NULL,
WEECHAT_STRING_SPLIT_STRIP_LEFT
| WEECHAT_STRING_SPLIT_STRIP_RIGHT
| WEECHAT_STRING_SPLIT_COLLAPSE_SEPS,
0, &num_items);
if (items)
{
for (i = 0; i < num_items; i++)
{
pos = strchr (items[i], ':');
if (pos)
{
pos[0] = '\0';
if (util_parse_longlong (pos + 1, 10, &number) && (number >= -1))
{
sys_setrlimit_resource (items[i], number);
}
else
{
gui_chat_printf (NULL,
_("%sInvalid limit for resource \"%s\": "
"%s (must be >= -1)"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
items[i], pos + 1);
}
}
}
string_free_split (items);
}
#endif /* HAVE_SYS_RESOURCE_H */
}
/*
* Display resource limits.
*/
void
sys_display_rlimit (void)
{
#ifdef HAVE_SYS_RESOURCE_H
struct rlimit rlim;
char str_cur[128], str_max[128];
int i;
gui_chat_printf (NULL, "");
gui_chat_printf (NULL, _("Resource limits (see \"man getrlimit\" for help):"));
for (i = 0; rlimit_resource[i].name; i++)
{
if (getrlimit (rlimit_resource[i].resource, &rlim) == 0)
{
if (rlim.rlim_cur == RLIM_INFINITY)
{
snprintf (str_cur, sizeof (str_cur), "unlimited");
}
else
{
snprintf (str_cur, sizeof (str_cur),
"%lld", (long long)rlim.rlim_cur);
}
if (rlim.rlim_max == RLIM_INFINITY)
{
snprintf (str_max, sizeof (str_max), "unlimited");
}
else
{
snprintf (str_max, sizeof (str_max),
"%lld", (long long)rlim.rlim_max);
}
gui_chat_printf (NULL,
" %-10s: %s (max: %s)",
rlimit_resource[i].name, str_cur, str_max);
}
else
{
gui_chat_printf (NULL,
_("%sUnable to get resource limit \"%s\": "
"error %d %s"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
rlimit_resource[i].name,
errno,
strerror (errno));
}
}
#else /* HAVE_SYS_RESOURCE_H */
gui_chat_printf (NULL,
_("System function \"%s\" is not available"),
"getrlimit");
#endif /* HAVE_SYS_RESOURCE_H */
}
/*
* Display resource usage.
*/
void
sys_display_rusage (void)
{
#ifdef HAVE_SYS_RESOURCE_H
struct rusage usage;
char *str_time;
unsigned long long microseconds;
gui_chat_printf (NULL, "");
gui_chat_printf (NULL, _("Resource usage (see \"man getrusage\" for help):"));
getrusage (RUSAGE_SELF, &usage);
/* ru_utime: user CPU time used */
microseconds = ((unsigned long long)usage.ru_utime.tv_sec * 1000000)
+ (unsigned long long)usage.ru_utime.tv_usec;
str_time = util_get_microseconds_string (microseconds);
if (str_time)
{
gui_chat_printf (NULL, " ru_utime : %s", str_time);
free (str_time);
}
/* ru_stime: system CPU time used */
microseconds = ((unsigned long long)usage.ru_stime.tv_sec * 1000000)
+ (unsigned long long)usage.ru_stime.tv_usec;
str_time = util_get_microseconds_string (microseconds);
if (str_time)
{
gui_chat_printf (NULL, " ru_stime : %s", str_time);
free (str_time);
}
/* ru_maxrss: maximum resident set size */
gui_chat_printf (NULL, " ru_maxrss : %ld", usage.ru_maxrss);
/* ru_ixrss: integral shared memory size */
gui_chat_printf (NULL, " ru_ixrss : %ld", usage.ru_ixrss);
/* ru_idrss: integral unshared data size */
gui_chat_printf (NULL, " ru_idrss : %ld", usage.ru_idrss);
/* ru_isrss: integral unshared stack size */
gui_chat_printf (NULL, " ru_isrss : %ld", usage.ru_isrss);
/* ru_minflt: page reclaims (soft page faults) */
gui_chat_printf (NULL, " ru_minflt : %ld", usage.ru_minflt);
/* ru_majflt: page faults (hard page faults) */
gui_chat_printf (NULL, " ru_majflt : %ld", usage.ru_majflt);
/* ru_nswap: swaps */
gui_chat_printf (NULL, " ru_nswap : %ld", usage.ru_nswap);
/* ru_inblock: block input operations */
gui_chat_printf (NULL, " ru_inblock : %ld", usage.ru_inblock);
/* ru_oublock: block output operations */
gui_chat_printf (NULL, " ru_oublock : %ld", usage.ru_oublock);
/* ru_msgsnd: IPC messages sent */
gui_chat_printf (NULL, " ru_msgsnd : %ld", usage.ru_msgsnd);
/* ru_msgrcv: IPC messages received */
gui_chat_printf (NULL, " ru_msgrcv : %ld", usage.ru_msgrcv);
/* ru_nsignals: signals received */
gui_chat_printf (NULL, " ru_nsignals: %ld", usage.ru_nsignals);
/* ru_nvcsw: voluntary context switches */
gui_chat_printf (NULL, " ru_nvcsw : %ld", usage.ru_nvcsw);
/* ru_nivcsw: involuntary context switches */
gui_chat_printf (NULL, " ru_nivcsw : %ld", usage.ru_nivcsw);
#else /* HAVE_SYS_RESOURCE_H */
gui_chat_printf (NULL,
_("System function \"%s\" is not available"),
"getrusage");
#endif /* HAVE_SYS_RESOURCE_H */
}
/*
* Call waitpid() to acknowledge the end of forked processes, thus preventing
* them to become zombies.
*/
void
sys_waitpid (int number_processes)
{
int i;
if (number_processes < 1)
return;
/* acknowledge the end of up to 42 forked processes */
i = 0;
while ((i < number_processes) && (waitpid (-1, NULL, WNOHANG) > 0))
{
i++;
}
}
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