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https://github.com/morgan9e/systemd
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21c43631d7
This is gets the resource limits off a specified process, and is very similar to prlimit() with a NULL new_rlimit argument. In fact, it tries that first. However, it then falls back to use /proc/$PID/limits. Why? Simply because Linux prohibits access to prlimit() for processes with a different UID, but /proc/$PID/limits still works. This is preparation to allow nspawn to run unprivileged.
30 lines
973 B
C
30 lines
973 B
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <sys/resource.h>
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#include "macro.h"
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#include "missing_resource.h"
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const char *rlimit_to_string(int i) _const_;
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int rlimit_from_string(const char *s) _pure_;
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int rlimit_from_string_harder(const char *s) _pure_;
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int setrlimit_closest(int resource, const struct rlimit *rlim);
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int setrlimit_closest_all(const struct rlimit * const *rlim, int *which_failed);
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int rlimit_parse_one(int resource, const char *val, rlim_t *ret);
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int rlimit_parse(int resource, const char *val, struct rlimit *ret);
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int rlimit_format(const struct rlimit *rl, char **ret);
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int rlimit_copy_all(struct rlimit* target[static _RLIMIT_MAX], struct rlimit* const source[static _RLIMIT_MAX]);
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void rlimit_free_all(struct rlimit **rl);
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#define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
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int rlimit_nofile_bump(int limit);
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int rlimit_nofile_safe(void);
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int pid_getrlimit(pid_t pid, int resource, struct rlimit *ret);
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