mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-20 21:50:23 +07:00
974 lines
23 KiB
C
974 lines
23 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <stdio.h>
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#include <syslog.h>
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#include <sched.h>
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#include <sys/resource.h>
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#include "macro.h"
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#include "util.h"
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#include "ioprio.h"
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#include "missing.h"
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usec_t now(clockid_t clock) {
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struct timespec ts;
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assert_se(clock_gettime(clock, &ts) == 0);
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return timespec_load(&ts);
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}
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usec_t timespec_load(const struct timespec *ts) {
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assert(ts);
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return
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(usec_t) ts->tv_sec * USEC_PER_SEC +
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(usec_t) ts->tv_nsec / NSEC_PER_USEC;
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}
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struct timespec *timespec_store(struct timespec *ts, usec_t u) {
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assert(ts);
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ts->tv_sec = (time_t) (u / USEC_PER_SEC);
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ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
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return ts;
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}
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usec_t timeval_load(const struct timeval *tv) {
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assert(tv);
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return
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(usec_t) tv->tv_sec * USEC_PER_SEC +
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(usec_t) tv->tv_usec;
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}
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struct timeval *timeval_store(struct timeval *tv, usec_t u) {
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assert(tv);
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tv->tv_sec = (time_t) (u / USEC_PER_SEC);
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tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
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return tv;
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}
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bool endswith(const char *s, const char *postfix) {
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size_t sl, pl;
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assert(s);
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assert(postfix);
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sl = strlen(s);
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pl = strlen(postfix);
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if (sl < pl)
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return false;
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return memcmp(s + sl - pl, postfix, pl) == 0;
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}
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bool startswith(const char *s, const char *prefix) {
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size_t sl, pl;
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assert(s);
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assert(prefix);
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sl = strlen(s);
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pl = strlen(prefix);
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if (sl < pl)
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return false;
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return memcmp(s, prefix, pl) == 0;
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}
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bool first_word(const char *s, const char *word) {
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size_t sl, wl;
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assert(s);
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assert(word);
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sl = strlen(s);
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wl = strlen(word);
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if (sl < wl)
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return false;
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if (memcmp(s, word, wl) != 0)
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return false;
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return (s[wl] == 0 ||
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strchr(WHITESPACE, s[wl]));
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}
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int close_nointr(int fd) {
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assert(fd >= 0);
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for (;;) {
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int r;
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if ((r = close(fd)) >= 0)
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return r;
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if (errno != EINTR)
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return r;
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}
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}
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void close_nointr_nofail(int fd) {
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/* like close_nointr() but cannot fail, and guarantees errno
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* is unchanged */
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assert_se(close_nointr(fd) == 0);
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}
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int parse_boolean(const char *v) {
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assert(v);
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if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
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return 1;
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else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
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return 0;
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return -EINVAL;
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}
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int safe_atou(const char *s, unsigned *ret_u) {
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char *x = NULL;
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unsigned long l;
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assert(s);
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assert(ret_u);
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errno = 0;
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l = strtoul(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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if ((unsigned long) (unsigned) l != l)
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return -ERANGE;
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*ret_u = (unsigned) l;
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return 0;
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}
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int safe_atoi(const char *s, int *ret_i) {
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char *x = NULL;
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long l;
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assert(s);
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assert(ret_i);
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errno = 0;
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l = strtol(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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if ((long) (int) l != l)
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return -ERANGE;
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*ret_i = (int) l;
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return 0;
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}
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int safe_atolu(const char *s, long unsigned *ret_lu) {
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char *x = NULL;
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unsigned long l;
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assert(s);
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assert(ret_lu);
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errno = 0;
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l = strtoul(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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*ret_lu = l;
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return 0;
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}
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int safe_atoli(const char *s, long int *ret_li) {
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char *x = NULL;
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long l;
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assert(s);
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assert(ret_li);
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errno = 0;
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l = strtol(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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*ret_li = l;
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return 0;
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}
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int safe_atollu(const char *s, long long unsigned *ret_llu) {
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char *x = NULL;
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unsigned long long l;
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assert(s);
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assert(ret_llu);
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errno = 0;
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l = strtoull(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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*ret_llu = l;
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return 0;
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}
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int safe_atolli(const char *s, long long int *ret_lli) {
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char *x = NULL;
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long long l;
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assert(s);
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assert(ret_lli);
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errno = 0;
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l = strtoll(s, &x, 0);
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if (!x || *x || errno)
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return errno ? -errno : -EINVAL;
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*ret_lli = l;
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return 0;
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}
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/* Split a string into words. */
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char *split_spaces(const char *c, size_t *l, char **state) {
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char *current;
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current = *state ? *state : (char*) c;
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if (!*current || *c == 0)
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return NULL;
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current += strspn(current, WHITESPACE);
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*l = strcspn(current, WHITESPACE);
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*state = current+*l;
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return (char*) current;
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}
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/* Split a string into words, but consider strings enclosed in '' and
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* "" as words even if they include spaces. */
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char *split_quoted(const char *c, size_t *l, char **state) {
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char *current;
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current = *state ? *state : (char*) c;
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if (!*current || *c == 0)
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return NULL;
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current += strspn(current, WHITESPACE);
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if (*current == '\'') {
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current ++;
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*l = strcspn(current, "'");
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*state = current+*l;
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if (**state == '\'')
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(*state)++;
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} else if (*current == '\"') {
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current ++;
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*l = strcspn(current, "\"");
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*state = current+*l;
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if (**state == '\"')
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(*state)++;
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} else {
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*l = strcspn(current, WHITESPACE);
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*state = current+*l;
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}
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/* FIXME: Cannot deal with strings that have spaces AND ticks
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* in them */
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return (char*) current;
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}
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int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
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int r;
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FILE *f;
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char fn[132], line[256], *p;
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long long unsigned ppid;
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assert(pid >= 0);
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assert(_ppid);
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assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
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fn[sizeof(fn)-1] = 0;
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if (!(f = fopen(fn, "r")))
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return -errno;
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if (!(fgets(line, sizeof(line), f))) {
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r = -errno;
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fclose(f);
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return r;
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}
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fclose(f);
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/* Let's skip the pid and comm fields. The latter is enclosed
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* in () but does not escape any () in its value, so let's
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* skip over it manually */
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if (!(p = strrchr(line, ')')))
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return -EIO;
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p++;
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if (sscanf(p, " "
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"%*c " /* state */
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"%llu ", /* ppid */
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&ppid) != 1)
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return -EIO;
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if ((long long unsigned) (pid_t) ppid != ppid)
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return -ERANGE;
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*_ppid = (pid_t) ppid;
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return 0;
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}
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int write_one_line_file(const char *fn, const char *line) {
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FILE *f;
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int r;
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assert(fn);
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assert(line);
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if (!(f = fopen(fn, "we")))
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return -errno;
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if (fputs(line, f) < 0) {
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r = -errno;
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goto finish;
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}
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r = 0;
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finish:
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fclose(f);
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return r;
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}
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int read_one_line_file(const char *fn, char **line) {
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FILE *f;
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int r;
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char t[64], *c;
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assert(fn);
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assert(line);
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if (!(f = fopen(fn, "re")))
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return -errno;
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if (!(fgets(t, sizeof(t), f))) {
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r = -errno;
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goto finish;
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}
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if (!(c = strdup(t))) {
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r = -ENOMEM;
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goto finish;
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}
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*line = c;
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r = 0;
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finish:
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fclose(f);
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return r;
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}
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char *strappend(const char *s, const char *suffix) {
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size_t a, b;
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char *r;
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assert(s);
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assert(suffix);
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a = strlen(s);
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b = strlen(suffix);
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if (!(r = new(char, a+b+1)))
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return NULL;
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memcpy(r, s, a);
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memcpy(r+a, suffix, b);
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r[a+b] = 0;
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return r;
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}
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int readlink_malloc(const char *p, char **r) {
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size_t l = 100;
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assert(p);
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assert(r);
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for (;;) {
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char *c;
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ssize_t n;
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if (!(c = new(char, l)))
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return -ENOMEM;
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if ((n = readlink(p, c, l-1)) < 0) {
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int ret = -errno;
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free(c);
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return ret;
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}
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if ((size_t) n < l-1) {
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c[n] = 0;
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*r = c;
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return 0;
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}
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free(c);
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l *= 2;
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}
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}
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char *file_name_from_path(const char *p) {
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char *r;
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assert(p);
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if ((r = strrchr(p, '/')))
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return r + 1;
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return (char*) p;
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}
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bool path_is_absolute(const char *p) {
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assert(p);
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return p[0] == '/';
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}
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bool is_path(const char *p) {
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return !!strchr(p, '/');
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}
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char *path_make_absolute(const char *p, const char *prefix) {
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char *r;
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assert(p);
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if (path_is_absolute(p) || !prefix)
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return strdup(p);
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if (asprintf(&r, "%s/%s", prefix, p) < 0)
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return NULL;
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return r;
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}
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int reset_all_signal_handlers(void) {
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int sig;
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for (sig = 1; sig < _NSIG; sig++) {
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struct sigaction sa;
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if (sig == SIGKILL || sig == SIGSTOP)
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continue;
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zero(sa);
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sa.sa_handler = SIG_DFL;
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sa.sa_flags = SA_RESTART;
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/* On Linux the first two RT signals are reserved by
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* glibc, and sigaction() will return EINVAL for them. */
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if ((sigaction(sig, &sa, NULL) < 0))
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if (errno != EINVAL)
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return -errno;
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}
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return 0;
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}
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char *strstrip(char *s) {
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char *e, *l = NULL;
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/* Drops trailing whitespace. Modifies the string in
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* place. Returns pointer to first non-space character */
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s += strspn(s, WHITESPACE);
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for (e = s; *e; e++)
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if (!strchr(WHITESPACE, *e))
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l = e;
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if (l)
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*(l+1) = 0;
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else
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*s = 0;
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return s;
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}
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char *file_in_same_dir(const char *path, const char *filename) {
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char *e, *r;
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size_t k;
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assert(path);
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assert(filename);
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|
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/* This removes the last component of path and appends
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* filename, unless the latter is absolute anyway or the
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* former isn't */
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if (path_is_absolute(filename))
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return strdup(filename);
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if (!(e = strrchr(path, '/')))
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return strdup(filename);
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k = strlen(filename);
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if (!(r = new(char, e-path+1+k+1)))
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return NULL;
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memcpy(r, path, e-path+1);
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memcpy(r+(e-path)+1, filename, k+1);
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return r;
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}
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|
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char hexchar(int x) {
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static const char table[16] = "0123456789abcdef";
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|
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return table[x & 15];
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}
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|
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int unhexchar(char c) {
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if (c >= '0' && c <= '9')
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return c - '0';
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if (c >= 'a' && c <= 'f')
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return c - 'a';
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if (c >= 'A' && c <= 'F')
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return c - 'A';
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return -1;
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}
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|
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char octchar(int x) {
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return '0' + (x & 7);
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}
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|
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int unoctchar(char c) {
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|
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if (c >= '0' && c <= '7')
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return c - '0';
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|
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return -1;
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}
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|
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char *cescape(const char *s) {
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char *r, *t;
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const char *f;
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|
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assert(s);
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|
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/* Does C style string escaping. */
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if (!(r = new(char, strlen(s)*4 + 1)))
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return NULL;
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|
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for (f = s, t = r; *f; f++)
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|
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switch (*f) {
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|
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case '\a':
|
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*(t++) = '\\';
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*(t++) = 'a';
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break;
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case '\b':
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*(t++) = '\\';
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*(t++) = 'b';
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break;
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case '\f':
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*(t++) = '\\';
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*(t++) = 'f';
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break;
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case '\n':
|
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*(t++) = '\\';
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*(t++) = 'n';
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break;
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case '\r':
|
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*(t++) = '\\';
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*(t++) = 'r';
|
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break;
|
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case '\t':
|
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*(t++) = '\\';
|
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*(t++) = 't';
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break;
|
|
case '\v':
|
|
*(t++) = '\\';
|
|
*(t++) = 'v';
|
|
break;
|
|
case '\\':
|
|
*(t++) = '\\';
|
|
*(t++) = '\\';
|
|
break;
|
|
case '"':
|
|
*(t++) = '\\';
|
|
*(t++) = '"';
|
|
break;
|
|
case '\'':
|
|
*(t++) = '\\';
|
|
*(t++) = '\'';
|
|
break;
|
|
|
|
default:
|
|
/* For special chars we prefer octal over
|
|
* hexadecimal encoding, simply because glib's
|
|
* g_strescape() does the same */
|
|
if ((*f < ' ') || (*f >= 127)) {
|
|
*(t++) = '\\';
|
|
*(t++) = octchar((unsigned char) *f >> 6);
|
|
*(t++) = octchar((unsigned char) *f >> 3);
|
|
*(t++) = octchar((unsigned char) *f);
|
|
} else
|
|
*(t++) = *f;
|
|
break;
|
|
}
|
|
|
|
*t = 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
char *cunescape(const char *s) {
|
|
char *r, *t;
|
|
const char *f;
|
|
|
|
assert(s);
|
|
|
|
/* Undoes C style string escaping */
|
|
|
|
if (!(r = new(char, strlen(s)+1)))
|
|
return r;
|
|
|
|
for (f = s, t = r; *f; f++) {
|
|
|
|
if (*f != '\\') {
|
|
*(t++) = *f;
|
|
continue;
|
|
}
|
|
|
|
f++;
|
|
|
|
switch (*f) {
|
|
|
|
case 'a':
|
|
*(t++) = '\a';
|
|
break;
|
|
case 'b':
|
|
*(t++) = '\b';
|
|
break;
|
|
case 'f':
|
|
*(t++) = '\f';
|
|
break;
|
|
case 'n':
|
|
*(t++) = '\n';
|
|
break;
|
|
case 'r':
|
|
*(t++) = '\r';
|
|
break;
|
|
case 't':
|
|
*(t++) = '\t';
|
|
break;
|
|
case 'v':
|
|
*(t++) = '\v';
|
|
break;
|
|
case '\\':
|
|
*(t++) = '\\';
|
|
break;
|
|
case '"':
|
|
*(t++) = '"';
|
|
break;
|
|
case '\'':
|
|
*(t++) = '\'';
|
|
break;
|
|
|
|
case 'x': {
|
|
/* hexadecimal encoding */
|
|
int a, b;
|
|
|
|
if ((a = unhexchar(f[1])) < 0 ||
|
|
(b = unhexchar(f[2])) < 0) {
|
|
/* Invalid escape code, let's take it literal then */
|
|
*(t++) = '\\';
|
|
*(t++) = 'x';
|
|
} else {
|
|
*(t++) = (char) ((a << 4) | b);
|
|
f += 2;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7': {
|
|
/* octal encoding */
|
|
int a, b, c;
|
|
|
|
if ((a = unoctchar(f[0])) < 0 ||
|
|
(b = unoctchar(f[1])) < 0 ||
|
|
(c = unoctchar(f[2])) < 0) {
|
|
/* Invalid escape code, let's take it literal then */
|
|
*(t++) = '\\';
|
|
*(t++) = f[0];
|
|
} else {
|
|
*(t++) = (char) ((a << 6) | (b << 3) | c);
|
|
f += 2;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case 0:
|
|
/* premature end of string.*/
|
|
*(t++) = '\\';
|
|
goto finish;
|
|
|
|
default:
|
|
/* Invalid escape code, let's take it literal then */
|
|
*(t++) = '\\';
|
|
*(t++) = 'f';
|
|
break;
|
|
}
|
|
}
|
|
|
|
finish:
|
|
*t = 0;
|
|
return r;
|
|
}
|
|
|
|
|
|
char *xescape(const char *s, const char *bad) {
|
|
char *r, *t;
|
|
const char *f;
|
|
|
|
/* Escapes all chars in bad, in addition to \ and all special
|
|
* chars, in \xFF style escaping. May be reversed with
|
|
* cunescape. */
|
|
|
|
if (!(r = new(char, strlen(s)*4+1)))
|
|
return NULL;
|
|
|
|
for (f = s, t = r; *f; f++) {
|
|
|
|
if (*f < ' ' || *f >= 127 ||
|
|
*f == '\\' || strchr(bad, *f)) {
|
|
*(t++) = '\\';
|
|
*(t++) = 'x';
|
|
*(t++) = hexchar(*f >> 4);
|
|
*(t++) = hexchar(*f);
|
|
} else
|
|
*(t++) = *f;
|
|
}
|
|
|
|
*t = 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
char *path_kill_slashes(char *path) {
|
|
char *f, *t;
|
|
bool slash = false;
|
|
|
|
/* Removes redundant inner and trailing slashes. Modifies the
|
|
* passed string in-place.
|
|
*
|
|
* ///foo///bar/ becomes /foo/bar
|
|
*/
|
|
|
|
for (f = path, t = path; *f; f++) {
|
|
|
|
if (*f == '/') {
|
|
slash = true;
|
|
continue;
|
|
}
|
|
|
|
if (slash) {
|
|
slash = false;
|
|
*(t++) = '/';
|
|
}
|
|
|
|
*(t++) = *f;
|
|
}
|
|
|
|
/* Special rule, if we are talking of the root directory, a
|
|
trailing slash is good */
|
|
|
|
if (t == path && slash)
|
|
*(t++) = '/';
|
|
|
|
*t = 0;
|
|
return path;
|
|
}
|
|
|
|
bool path_startswith(const char *path, const char *prefix) {
|
|
assert(path);
|
|
assert(prefix);
|
|
|
|
if ((path[0] == '/') != (prefix[0] == '/'))
|
|
return false;
|
|
|
|
for (;;) {
|
|
size_t a, b;
|
|
|
|
path += strspn(path, "/");
|
|
prefix += strspn(prefix, "/");
|
|
|
|
if (*prefix == 0)
|
|
return true;
|
|
|
|
if (*path == 0)
|
|
return false;
|
|
|
|
a = strcspn(path, "/");
|
|
b = strcspn(prefix, "/");
|
|
|
|
if (a != b)
|
|
return false;
|
|
|
|
if (memcmp(path, prefix, a) != 0)
|
|
return false;
|
|
|
|
path += a;
|
|
prefix += b;
|
|
}
|
|
}
|
|
|
|
char *ascii_strlower(char *path) {
|
|
char *p;
|
|
|
|
assert(path);
|
|
|
|
for (p = path; *p; p++)
|
|
if (*p >= 'A' && *p <= 'Z')
|
|
*p = *p - 'A' + 'a';
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *const ioprio_class_table[] = {
|
|
[IOPRIO_CLASS_NONE] = "none",
|
|
[IOPRIO_CLASS_RT] = "realtime",
|
|
[IOPRIO_CLASS_BE] = "best-effort",
|
|
[IOPRIO_CLASS_IDLE] = "idle"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
|
|
|
|
static const char *const sigchld_code_table[] = {
|
|
[CLD_EXITED] = "exited",
|
|
[CLD_KILLED] = "killed",
|
|
[CLD_DUMPED] = "dumped",
|
|
[CLD_TRAPPED] = "trapped",
|
|
[CLD_STOPPED] = "stopped",
|
|
[CLD_CONTINUED] = "continued",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
|
|
|
|
static const char *const log_facility_table[LOG_NFACILITIES] = {
|
|
[LOG_FAC(LOG_KERN)] = "kern",
|
|
[LOG_FAC(LOG_USER)] = "user",
|
|
[LOG_FAC(LOG_MAIL)] = "mail",
|
|
[LOG_FAC(LOG_DAEMON)] = "daemon",
|
|
[LOG_FAC(LOG_AUTH)] = "auth",
|
|
[LOG_FAC(LOG_SYSLOG)] = "syslog",
|
|
[LOG_FAC(LOG_LPR)] = "lpr",
|
|
[LOG_FAC(LOG_NEWS)] = "news",
|
|
[LOG_FAC(LOG_UUCP)] = "uucp",
|
|
[LOG_FAC(LOG_CRON)] = "cron",
|
|
[LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
|
|
[LOG_FAC(LOG_FTP)] = "ftp",
|
|
[LOG_FAC(LOG_LOCAL0)] = "local0",
|
|
[LOG_FAC(LOG_LOCAL1)] = "local1",
|
|
[LOG_FAC(LOG_LOCAL2)] = "local2",
|
|
[LOG_FAC(LOG_LOCAL3)] = "local3",
|
|
[LOG_FAC(LOG_LOCAL4)] = "local4",
|
|
[LOG_FAC(LOG_LOCAL5)] = "local5",
|
|
[LOG_FAC(LOG_LOCAL6)] = "local6",
|
|
[LOG_FAC(LOG_LOCAL7)] = "local7"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
|
|
|
|
static const char *const log_level_table[] = {
|
|
[LOG_EMERG] = "emerg",
|
|
[LOG_ALERT] = "alert",
|
|
[LOG_CRIT] = "crit",
|
|
[LOG_ERR] = "err",
|
|
[LOG_WARNING] = "warning",
|
|
[LOG_NOTICE] = "notice",
|
|
[LOG_INFO] = "info",
|
|
[LOG_DEBUG] = "debug"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(log_level, int);
|
|
|
|
static const char* const sched_policy_table[] = {
|
|
[SCHED_OTHER] = "other",
|
|
[SCHED_BATCH] = "batch",
|
|
[SCHED_IDLE] = "idle",
|
|
[SCHED_FIFO] = "fifo",
|
|
[SCHED_RR] = "rr"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
|
|
|
|
static const char* const rlimit_table[] = {
|
|
[RLIMIT_CPU] = "LimitCPU",
|
|
[RLIMIT_FSIZE] = "LimitFSIZE",
|
|
[RLIMIT_DATA] = "LimitDATA",
|
|
[RLIMIT_STACK] = "LimitSTACK",
|
|
[RLIMIT_CORE] = "LimitCORE",
|
|
[RLIMIT_RSS] = "LimitRSS",
|
|
[RLIMIT_NOFILE] = "LimitNOFILE",
|
|
[RLIMIT_AS] = "LimitAS",
|
|
[RLIMIT_NPROC] = "LimitNPROC",
|
|
[RLIMIT_MEMLOCK] = "LimitMEMLOCK",
|
|
[RLIMIT_LOCKS] = "LimitLOCKS",
|
|
[RLIMIT_SIGPENDING] = "LimitSIGPENDING",
|
|
[RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
|
|
[RLIMIT_NICE] = "LimitNICE",
|
|
[RLIMIT_RTPRIO] = "LimitRTPRIO",
|
|
[RLIMIT_RTTIME] = "LimitRTTIME"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
|