/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <alloca.h> #include <fcntl.h> #include <inttypes.h> #include <limits.h> #include <locale.h> #include <stdarg.h> #include <stdbool.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> #include <sys/inotify.h> #include <sys/socket.h> #include <sys/stat.h> #include <sys/statfs.h> #include <sys/types.h> #include <time.h> #include <unistd.h> #include "formats-util.h" #include "macro.h" #include "missing.h" #include "time-util.h" /* What is interpreted as whitespace? */ #define WHITESPACE " \t\n\r" #define NEWLINE "\n\r" #define QUOTES "\"\'" #define COMMENTS "#;" #define GLOB_CHARS "*?[" size_t page_size(void) _pure_; #define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) #define new0(t, n) ((t*) calloc((n), sizeof(t))) #define newa(t, n) ((t*) alloca(sizeof(t)*(n))) #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n))) #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n))) #define malloc0(n) (calloc(1, (n))) static inline void *mfree(void *memory) { free(memory); return NULL; } static inline const char* yes_no(bool b) { return b ? "yes" : "no"; } static inline const char* true_false(bool b) { return b ? "true" : "false"; } static inline const char* one_zero(bool b) { return b ? "1" : "0"; } bool fstype_is_network(const char *fstype); #define xsprintf(buf, fmt, ...) \ assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), \ "xsprintf: " #buf "[] must be big enough") noreturn void freeze(void); void execute_directories(const char* const* directories, usec_t timeout, char *argv[]); bool plymouth_running(void); bool display_is_local(const char *display) _pure_; int socket_from_display(const char *display, char **path); int glob_exists(const char *path); int glob_extend(char ***strv, const char *path); int block_get_whole_disk(dev_t d, dev_t *ret); #define NULSTR_FOREACH(i, l) \ for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1) #define NULSTR_FOREACH_PAIR(i, j, l) \ for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i)) int ioprio_class_to_string_alloc(int i, char **s); int ioprio_class_from_string(const char *s); const char *sigchld_code_to_string(int i) _const_; int sigchld_code_from_string(const char *s) _pure_; int log_facility_unshifted_to_string_alloc(int i, char **s); int log_facility_unshifted_from_string(const char *s); bool log_facility_unshifted_is_valid(int faciliy); int log_level_to_string_alloc(int i, char **s); int log_level_from_string(const char *s); bool log_level_is_valid(int level); int sched_policy_to_string_alloc(int i, char **s); int sched_policy_from_string(const char *s); extern int saved_argc; extern char **saved_argv; bool kexec_loaded(void); int prot_from_flags(int flags) _const_; void* memdup(const void *p, size_t l) _alloc_(2); int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...); bool http_url_is_valid(const char *url) _pure_; bool documentation_url_is_valid(const char *url) _pure_; bool http_etag_is_valid(const char *etag); bool in_initrd(void); static inline void freep(void *p) { free(*(void**) p); } #define _cleanup_free_ _cleanup_(freep) #define _cleanup_globfree_ _cleanup_(globfree) _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return malloc(a * b); } _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return realloc(p, a * b); } _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return memdup(p, a * b); } /** * Check if a string contains any glob patterns. */ _pure_ static inline bool string_is_glob(const char *p) { return !!strpbrk(p, GLOB_CHARS); } void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, int (*compar) (const void *, const void *, void *), void *arg); int on_ac_power(void); static inline void *mempset(void *s, int c, size_t n) { memset(s, c, n); return (uint8_t*)s + n; } void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size); void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size); #define GREEDY_REALLOC(array, allocated, need) \ greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0])) #define GREEDY_REALLOC0(array, allocated, need) \ greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0])) static inline void _reset_errno_(int *saved_errno) { errno = *saved_errno; } #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno static inline int negative_errno(void) { /* This helper should be used to shut up gcc if you know 'errno' is * negative. Instead of "return -errno;", use "return negative_errno();" * It will suppress bogus gcc warnings in case it assumes 'errno' might * be 0 and thus the caller's error-handling might not be triggered. */ assert_return(errno > 0, -EINVAL); return -errno; } static inline unsigned u64log2(uint64_t n) { #if __SIZEOF_LONG_LONG__ == 8 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0; #else #error "Wut?" #endif } static inline unsigned u32ctz(uint32_t n) { #if __SIZEOF_INT__ == 4 return __builtin_ctz(n); #else #error "Wut?" #endif } static inline unsigned log2i(int x) { assert(x > 0); return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1; } static inline unsigned log2u(unsigned x) { assert(x > 0); return sizeof(unsigned) * 8 - __builtin_clz(x) - 1; } static inline unsigned log2u_round_up(unsigned x) { assert(x > 0); if (x == 1) return 0; return log2u(x - 1) + 1; } #define DECIMAL_STR_WIDTH(x) \ ({ \ typeof(x) _x_ = (x); \ unsigned ans = 1; \ while (_x_ /= 10) \ ans++; \ ans; \ }) #define alloca0(n) \ ({ \ char *_new_; \ size_t _len_ = n; \ _new_ = alloca(_len_); \ (void *) memset(_new_, 0, _len_); \ }) /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */ #define alloca_align(size, align) \ ({ \ void *_ptr_; \ size_t _mask_ = (align) - 1; \ _ptr_ = alloca((size) + _mask_); \ (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \ }) #define alloca0_align(size, align) \ ({ \ void *_new_; \ size_t _size_ = (size); \ _new_ = alloca_align(_size_, (align)); \ (void*)memset(_new_, 0, _size_); \ }) bool id128_is_valid(const char *s) _pure_; /** * Normal qsort requires base to be nonnull. Here were require * that only if nmemb > 0. */ static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) { if (nmemb <= 1) return; assert(base); qsort(base, nmemb, size, compar); } int container_get_leader(const char *machine, pid_t *pid); int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd); int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd); #ifndef PERSONALITY_INVALID /* personality(7) documents that 0xffffffffUL is used for querying the * current personality, hence let's use that here as error * indicator. */ #define PERSONALITY_INVALID 0xffffffffLU #endif unsigned long personality_from_string(const char *p); const char *personality_to_string(unsigned long); uint64_t physical_memory(void); union file_handle_union { struct file_handle handle; char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ]; }; #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ } int update_reboot_param_file(const char *param); #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1) #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \ for ((e) = &buffer.ev; \ (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \ (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len)) union inotify_event_buffer { struct inotify_event ev; uint8_t raw[INOTIFY_EVENT_MAX]; }; int syslog_parse_priority(const char **p, int *priority, bool with_facility); int version(void); bool fdname_is_valid(const char *s); bool oom_score_adjust_is_valid(int oa);