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common: Add helpers for raising/lowering FD limit

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Signed-off-by: Joshua Ashton <joshua@froggi.es>
This commit is contained in:
Joshua Ashton 2022-07-17 00:47:20 +00:00
parent fd7ec0ab95
commit 6c2bbb42ea
3 changed files with 48 additions and 0 deletions
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8
include/common/fd_util.h Normal file
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@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __LABWC_FD_UTIL_H
#define __LABWC_FD_UTIL_H
void increase_nofile_limit(void);
void restore_nofile_limit(void);
#endif /* __LABWC_FD_UTIL_H */

39
src/common/fd_util.c Normal file
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@ -0,0 +1,39 @@
// SPDX-License-Identifier: GPL-2.0-only
#define _POSIX_C_SOURCE 200809L
#include <sys/resource.h>
#include <wlr/util/log.h>
#include "common/fd_util.h"
static struct rlimit original_nofile_rlimit = {0};
void
increase_nofile_limit(void)
{
if (getrlimit(RLIMIT_NOFILE, &original_nofile_rlimit) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to bump max open files limit: getrlimit(NOFILE) failed");
return;
}
struct rlimit new_rlimit = original_nofile_rlimit;
new_rlimit.rlim_cur = new_rlimit.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &new_rlimit) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to bump max open files limit: setrlimit(NOFILE) failed");
wlr_log(WLR_INFO, "Running with %d max open files",
(int)original_nofile_rlimit.rlim_cur);
}
}
void
restore_nofile_limit(void)
{
if (original_nofile_rlimit.rlim_cur == 0) {
return;
}
if (setrlimit(RLIMIT_NOFILE, &original_nofile_rlimit) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to restore max open files limit: setrlimit(NOFILE) failed");
}
}

1
src/common/meson.build
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@ -1,6 +1,7 @@
labwc_sources += files(
'buf.c',
'dir.c',
'fd_util.c',
'font.c',
'grab-file.c',
'nodename.c',