diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
commit | fccd290a8373438c26ed4e4f8130db18eb9b3dfe (patch) | |
tree | 2f032e1b125aa88e456644de865e9f42fffa4150 /src/libbasic/util.h | |
parent | 6169d05b4a456e26a0197242464e3e2bca12a29d (diff) |
./move.sh
Diffstat (limited to 'src/libbasic/util.h')
-rw-r--r-- | src/libbasic/util.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/libbasic/util.h b/src/libbasic/util.h new file mode 100644 index 0000000000..6f42c85a33 --- /dev/null +++ b/src/libbasic/util.h @@ -0,0 +1,178 @@ +#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 <errno.h> +#include <fcntl.h> +#include <inttypes.h> +#include <limits.h> +#include <locale.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.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" + +size_t page_size(void) _pure_; +#define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) + +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"; +} + +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 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)) + +extern int saved_argc; +extern char **saved_argv; + +bool kexec_loaded(void); + +int prot_from_flags(int flags) _const_; + +int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...); + +bool in_initrd(void); + +void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, + int (*compar) (const void *, const void *, void *), + void *arg); + +/** + * 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 on_ac_power(void); + +#define memzero(x,l) (memset((x), 0, (l))) +#define zero(x) (memzero(&(x), sizeof(x))) + +static inline void *mempset(void *s, int c, size_t n) { + memset(s, c, n); + return (uint8_t*)s + n; +} + +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; +} + +bool id128_is_valid(const char *s) _pure_; + +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); + +uint64_t physical_memory(void); + +int update_reboot_param_file(const char *param); + +int version(void); |