diff options
Diffstat (limited to 'src/basic/rlimit-util.c')
| -rw-r--r-- | src/basic/rlimit-util.c | 202 |
1 files changed, 200 insertions, 2 deletions
diff --git a/src/basic/rlimit-util.c b/src/basic/rlimit-util.c index 44f885db16..7540b43215 100644 --- a/src/basic/rlimit-util.c +++ b/src/basic/rlimit-util.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -22,10 +20,14 @@ #include <errno.h> #include <sys/resource.h> +#include "alloc-util.h" +#include "extract-word.h" +#include "formats-util.h" #include "macro.h" #include "missing.h" #include "rlimit-util.h" #include "string-table.h" +#include "time-util.h" int setrlimit_closest(int resource, const struct rlimit *rlim) { struct rlimit highest, fixed; @@ -51,6 +53,202 @@ int setrlimit_closest(int resource, const struct rlimit *rlim) { return 0; } +static int rlimit_parse_u64(const char *val, rlim_t *ret) { + uint64_t u; + int r; + + assert(val); + assert(ret); + + if (streq(val, "infinity")) { + *ret = RLIM_INFINITY; + return 0; + } + + /* setrlimit(2) suggests rlim_t is always 64bit on Linux. */ + assert_cc(sizeof(rlim_t) == sizeof(uint64_t)); + + r = safe_atou64(val, &u); + if (r < 0) + return r; + if (u >= (uint64_t) RLIM_INFINITY) + return -ERANGE; + + *ret = (rlim_t) u; + return 0; +} + +static int rlimit_parse_size(const char *val, rlim_t *ret) { + uint64_t u; + int r; + + assert(val); + assert(ret); + + if (streq(val, "infinity")) { + *ret = RLIM_INFINITY; + return 0; + } + + r = parse_size(val, 1024, &u); + if (r < 0) + return r; + if (u >= (uint64_t) RLIM_INFINITY) + return -ERANGE; + + *ret = (rlim_t) u; + return 0; +} + +static int rlimit_parse_sec(const char *val, rlim_t *ret) { + uint64_t u; + usec_t t; + int r; + + assert(val); + assert(ret); + + if (streq(val, "infinity")) { + *ret = RLIM_INFINITY; + return 0; + } + + r = parse_sec(val, &t); + if (r < 0) + return r; + if (t == USEC_INFINITY) { + *ret = RLIM_INFINITY; + return 0; + } + + u = (uint64_t) DIV_ROUND_UP(t, USEC_PER_SEC); + if (u >= (uint64_t) RLIM_INFINITY) + return -ERANGE; + + *ret = (rlim_t) u; + return 0; +} + +static int rlimit_parse_usec(const char *val, rlim_t *ret) { + usec_t t; + int r; + + assert(val); + assert(ret); + + if (streq(val, "infinity")) { + *ret = RLIM_INFINITY; + return 0; + } + + r = parse_time(val, &t, 1); + if (r < 0) + return r; + if (t == USEC_INFINITY) { + *ret = RLIM_INFINITY; + return 0; + } + + *ret = (rlim_t) t; + return 0; +} + +static int (*const rlimit_parse_table[_RLIMIT_MAX])(const char *val, rlim_t *ret) = { + [RLIMIT_CPU] = rlimit_parse_sec, + [RLIMIT_FSIZE] = rlimit_parse_size, + [RLIMIT_DATA] = rlimit_parse_size, + [RLIMIT_STACK] = rlimit_parse_size, + [RLIMIT_CORE] = rlimit_parse_size, + [RLIMIT_RSS] = rlimit_parse_size, + [RLIMIT_NOFILE] = rlimit_parse_u64, + [RLIMIT_AS] = rlimit_parse_size, + [RLIMIT_NPROC] = rlimit_parse_u64, + [RLIMIT_MEMLOCK] = rlimit_parse_size, + [RLIMIT_LOCKS] = rlimit_parse_u64, + [RLIMIT_SIGPENDING] = rlimit_parse_u64, + [RLIMIT_MSGQUEUE] = rlimit_parse_size, + [RLIMIT_NICE] = rlimit_parse_u64, + [RLIMIT_RTPRIO] = rlimit_parse_u64, + [RLIMIT_RTTIME] = rlimit_parse_usec, +}; + +int rlimit_parse_one(int resource, const char *val, rlim_t *ret) { + assert(val); + assert(ret); + + if (resource < 0) + return -EINVAL; + if (resource >= _RLIMIT_MAX) + return -EINVAL; + + return rlimit_parse_table[resource](val, ret); +} + +int rlimit_parse(int resource, const char *val, struct rlimit *ret) { + _cleanup_free_ char *hard = NULL, *soft = NULL; + rlim_t hl, sl; + int r; + + assert(val); + assert(ret); + + r = extract_first_word(&val, &soft, ":", EXTRACT_DONT_COALESCE_SEPARATORS); + if (r < 0) + return r; + if (r == 0) + return -EINVAL; + + r = rlimit_parse_one(resource, soft, &sl); + if (r < 0) + return r; + + r = extract_first_word(&val, &hard, ":", EXTRACT_DONT_COALESCE_SEPARATORS); + if (r < 0) + return r; + if (!isempty(val)) + return -EINVAL; + if (r == 0) + hl = sl; + else { + r = rlimit_parse_one(resource, hard, &hl); + if (r < 0) + return r; + if (sl > hl) + return -EILSEQ; + } + + *ret = (struct rlimit) { + .rlim_cur = sl, + .rlim_max = hl, + }; + + return 0; +} + +int rlimit_format(const struct rlimit *rl, char **ret) { + char *s = NULL; + + assert(rl); + assert(ret); + + if (rl->rlim_cur >= RLIM_INFINITY && rl->rlim_max >= RLIM_INFINITY) + s = strdup("infinity"); + else if (rl->rlim_cur >= RLIM_INFINITY) + (void) asprintf(&s, "infinity:" RLIM_FMT, rl->rlim_max); + else if (rl->rlim_max >= RLIM_INFINITY) + (void) asprintf(&s, RLIM_FMT ":infinity", rl->rlim_cur); + else if (rl->rlim_cur == rl->rlim_max) + (void) asprintf(&s, RLIM_FMT, rl->rlim_cur); + else + (void) asprintf(&s, RLIM_FMT ":" RLIM_FMT, rl->rlim_cur, rl->rlim_max); + + if (!s) + return -ENOMEM; + + *ret = s; + return 0; +} + static const char* const rlimit_table[_RLIMIT_MAX] = { [RLIMIT_CPU] = "LimitCPU", [RLIMIT_FSIZE] = "LimitFSIZE", |