X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Futil.h;h=9aea3a4e505ffe59b616e13fb2aabd67f2ad86bf;hp=bbf744e900bc01aae20d6476bcb70ac8b4d78630;hb=c50e4f95d8cfcd21bde2b0d1ff24b4de8fef4976;hpb=59164be40e6b520315d87e1ef16a3be65c854224 diff --git a/src/shared/util.h b/src/shared/util.h index bbf744e90..9aea3a4e5 100644 --- a/src/shared/util.h +++ b/src/shared/util.h @@ -21,6 +21,7 @@ along with systemd; If not, see . ***/ +#include #include #include #include @@ -36,39 +37,58 @@ #include #include #include +#include +#include +#include +#include + +#if SIZEOF_PID_T == 4 +# define PID_FMT "%" PRIu32 +#elif SIZEOF_PID_T == 2 +# define PID_FMT "%" PRIu16 +#else +# error Unknown pid_t size +#endif + +#if SIZEOF_UID_T == 4 +# define UID_FMT "%" PRIu32 +#elif SIZEOF_UID_T == 2 +# define UID_FMT "%" PRIu16 +#else +# error Unknown uid_t size +#endif #include "macro.h" #include "time-util.h" -union dirent_storage { - struct dirent de; - uint8_t storage[offsetof(struct dirent, d_name) + - ((NAME_MAX + 1 + sizeof(long)) & ~(sizeof(long) - 1))]; -}; - /* What is interpreted as whitespace? */ #define WHITESPACE " \t\n\r" -#define NEWLINE "\n\r" -#define QUOTES "\"\'" -#define COMMENTS "#;\n" +#define NEWLINE "\n\r" +#define QUOTES "\"\'" +#define COMMENTS "#;" +#define GLOB_CHARS "*?[" #define FORMAT_BYTES_MAX 8 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m" +#define ANSI_RED_ON "\x1B[31m" #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m" +#define ANSI_GREEN_ON "\x1B[32m" #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m" #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m" +#define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m" #define ANSI_HIGHLIGHT_OFF "\x1B[0m" - -bool is_efiboot(void); +#define ANSI_ERASE_TO_END_OF_LINE "\x1B[K" size_t page_size(void); #define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) #define streq(a,b) (strcmp((a),(b)) == 0) #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0) +#define strcaseeq(a,b) (strcasecmp((a),(b)) == 0) +#define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0) -bool streq_ptr(const char *a, const char *b); +bool streq_ptr(const char *a, const char *b) _pure_; #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) @@ -84,6 +104,10 @@ 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* strempty(const char *s) { return s ? s : ""; } @@ -100,17 +124,27 @@ static inline bool isempty(const char *p) { return !p || !p[0]; } -char *endswith(const char *s, const char *postfix); -char *startswith(const char *s, const char *prefix); -char *startswith_no_case(const char *s, const char *prefix); +static inline const char *startswith(const char *s, const char *prefix) { + if (strncmp(s, prefix, strlen(prefix)) == 0) + return s + strlen(prefix); + return NULL; +} -bool first_word(const char *s, const char *word); +static inline const char *startswith_no_case(const char *s, const char *prefix) { + if (strncasecmp(s, prefix, strlen(prefix)) == 0) + return s + strlen(prefix); + return NULL; +} + +char *endswith(const char *s, const char *postfix) _pure_; + +bool first_word(const char *s, const char *word) _pure_; int close_nointr(int fd); void close_nointr_nofail(int fd); void close_many(const int fds[], unsigned n_fd); -int parse_boolean(const char *v); +int parse_boolean(const char *v) _pure_; int parse_bytes(const char *t, off_t *bytes); int parse_pid(const char *s, pid_t* ret_pid); int parse_uid(const char *s, uid_t* ret_uid); @@ -122,6 +156,8 @@ int safe_atoi(const char *s, int *ret_i); int safe_atollu(const char *s, unsigned long long *ret_u); int safe_atolli(const char *s, long long int *ret_i); +int safe_atod(const char *s, double *ret_d); + #if __WORDSIZE == 32 static inline int safe_atolu(const char *s, unsigned long *ret_u) { assert_cc(sizeof(unsigned long) == sizeof(unsigned)); @@ -162,29 +198,25 @@ static inline int safe_atoi64(const char *s, int64_t *ret_i) { return safe_atolli(s, (long long int*) ret_i); } -char *split(const char *c, size_t *l, const char *separator, char **state); -char *split_quoted(const char *c, size_t *l, char **state); +char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state); #define FOREACH_WORD(word, length, s, state) \ - for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state))) + _FOREACH_WORD(word, length, s, WHITESPACE, false, state) #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \ - for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state))) + _FOREACH_WORD(word, length, s, separator, false, state) #define FOREACH_WORD_QUOTED(word, length, s, state) \ - for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state))) + _FOREACH_WORD(word, length, s, WHITESPACE, true, state) -pid_t get_parent_of_pid(pid_t pid, pid_t *ppid); -int get_starttime_of_pid(pid_t pid, unsigned long long *st); +#define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \ + _FOREACH_WORD(word, length, s, separator, true, state) -int write_one_line_file(const char *fn, const char *line); -int write_one_line_file_atomic(const char *fn, const char *line); -int read_one_line_file(const char *fn, char **line); -int read_full_file(const char *fn, char **contents, size_t *size); +#define _FOREACH_WORD(word, length, s, separator, quoted, state) \ + for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state))) -int parse_env_file(const char *fname, const char *separator, ...) _sentinel_; -int load_env_file(const char *fname, char ***l); -int write_env_file(const char *fname, char **l); +pid_t get_parent_of_pid(pid_t pid, pid_t *ppid); +int get_starttime_of_pid(pid_t pid, unsigned long long *st); char *strappend(const char *s, const char *suffix); char *strnappend(const char *s, const char *suffix, size_t length); @@ -211,13 +243,14 @@ int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char * int get_process_exe(pid_t pid, char **name); int get_process_uid(pid_t pid, uid_t *uid); int get_process_gid(pid_t pid, gid_t *gid); +int get_process_capeff(pid_t pid, char **capeff); -char hexchar(int x); -int unhexchar(char c); -char octchar(int x); -int unoctchar(char c); -char decchar(int x); -int undecchar(char c); +char hexchar(int x) _const_; +int unhexchar(char c) _const_; +char octchar(int x) _const_; +int unoctchar(char c) _const_; +char decchar(int x) _const_; +int undecchar(char c) _const_; char *cescape(const char *s); char *cunescape(const char *s); @@ -226,23 +259,33 @@ char *cunescape_length_with_prefix(const char *s, size_t length, const char *pre char *xescape(const char *s, const char *bad); -char *bus_path_escape(const char *s); -char *bus_path_unescape(const char *s); - char *ascii_strlower(char *path); -bool dirent_is_file(const struct dirent *de); -bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix); +bool dirent_is_file(const struct dirent *de) _pure_; +bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_; -bool ignore_file(const char *filename); +bool ignore_file(const char *filename) _pure_; -bool chars_intersect(const char *a, const char *b); +bool chars_intersect(const char *a, const char *b) _pure_; int make_stdio(int fd); int make_null_stdio(void); int make_console_stdio(void); -unsigned long long random_ull(void); +int dev_urandom(void *p, size_t n); +void random_bytes(void *p, size_t n); + +static inline uint64_t random_u64(void) { + uint64_t u; + random_bytes(&u, sizeof(u)); + return u; +} + +static inline uint32_t random_u32(void) { + uint32_t u; + random_bytes(&u, sizeof(u)); + return u; +} /* For basic lookup tables with strictly enumerated entries */ #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \ @@ -253,7 +296,8 @@ unsigned long long random_ull(void); } \ scope type name##_from_string(const char *s) { \ type i; \ - assert(s); \ + if (!s) \ + return (type) -1; \ for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \ if (name##_table[i] && \ streq(name##_table[i], s)) \ @@ -308,7 +352,7 @@ bool fstype_is_network(const char *fstype); int chvt(int vt); int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl); -int ask(char *ret, const char *replies, const char *text, ...); +int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4); int reset_terminal_fd(int fd, bool switch_to_text); int reset_terminal(const char *name); @@ -332,6 +376,7 @@ ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll); bool is_device_path(const char *path); int dir_is_empty(const char *path); +char* dirname_malloc(const char *path); void rename_process(const char name[8]); @@ -361,8 +406,8 @@ int pipe_eof(int fd); cpu_set_t* cpu_set_malloc(unsigned *ncpus); -int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap); -int status_printf(const char *status, bool ellipse, const char *format, ...); +int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0); +int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5); int status_welcome(void); int fd_columns(int fd); @@ -373,9 +418,34 @@ void columns_lines_cache_reset(int _unused_ signum); bool on_tty(void); +static inline const char *ansi_highlight(void) { + return on_tty() ? ANSI_HIGHLIGHT_ON : ""; +} + +static inline const char *ansi_highlight_red(void) { + return on_tty() ? ANSI_HIGHLIGHT_RED_ON : ""; +} + +static inline const char *ansi_highlight_green(void) { + return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : ""; +} + +static inline const char *ansi_highlight_yellow(void) { + return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : ""; +} + +static inline const char *ansi_highlight_blue(void) { + return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : ""; +} + +static inline const char *ansi_highlight_off(void) { + return on_tty() ? ANSI_HIGHLIGHT_OFF : ""; +} + int running_in_chroot(void); char *ellipsize(const char *s, size_t length, unsigned percent); + /* bytes columns */ char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent); int touch(const char *path); @@ -386,18 +456,19 @@ char *normalize_env_assignment(const char *s); int wait_for_terminate(pid_t pid, siginfo_t *status); int wait_for_terminate_and_warn(const char *name, pid_t pid); -_noreturn_ void freeze(void); +noreturn void freeze(void); -bool null_or_empty(struct stat *st); +bool null_or_empty(struct stat *st) _pure_; int null_or_empty_path(const char *fn); DIR *xopendirat(int dirfd, const char *name, int flags); char *fstab_node_to_udev_node(const char *p); +char *resolve_dev_console(char **active); bool tty_is_vc(const char *tty); bool tty_is_vc_resolve(const char *tty); -bool tty_is_console(const char *tty); +bool tty_is_console(const char *tty) _pure_; int vtnr_from_tty(const char *tty); const char *default_term_for_tty(const char *tty); @@ -409,8 +480,8 @@ bool nulstr_contains(const char*nulstr, const char *needle); bool plymouth_running(void); -bool hostname_is_valid(const char *s); -char* hostname_cleanup(char *s); +bool hostname_is_valid(const char *s) _pure_; +char* hostname_cleanup(char *s, bool lowercase); char* strshorten(char *s, size_t l); @@ -419,23 +490,26 @@ int terminal_vhangup(const char *name); int vt_disallocate(const char *name); -int copy_file(const char *from, const char *to); +int copy_file(const char *from, const char *to, int flags); int symlink_atomic(const char *from, const char *to); int fchmod_umask(int fd, mode_t mode); -bool display_is_local(const char *display); +bool display_is_local(const char *display) _pure_; int socket_from_display(const char *display, char **path); int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell); int get_group_creds(const char **groupname, gid_t *gid); +int in_gid(gid_t gid); int in_group(const char *name); char* uid_to_name(uid_t uid); +char* gid_to_name(gid_t gid); int glob_exists(const char *path); +int glob_extend(char ***strv, const char *path); int dirent_ensure_type(DIR *d, struct dirent *de); @@ -446,7 +520,7 @@ char *strjoin(const char *x, ...) _sentinel_; bool is_main_thread(void); -bool in_charset(const char *s, const char* charset); +bool in_charset(const char *s, const char* charset) _pure_; int block_get_whole_disk(dev_t d, dev_t *ret); @@ -463,8 +537,8 @@ int strdup_or_null(const char *a, char **b); 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); -int sigchld_code_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); @@ -475,14 +549,14 @@ int log_level_from_string(const char *s); int sched_policy_to_string_alloc(int i, char **s); int sched_policy_from_string(const char *s); -const char *rlimit_to_string(int i); -int rlimit_from_string(const char *s); +const char *rlimit_to_string(int i) _const_; +int rlimit_from_string(const char *s) _pure_; int ip_tos_to_string_alloc(int i, char **s); int ip_tos_from_string(const char *s); -const char *signal_to_string(int i); -int signal_from_string(const char *s); +const char *signal_to_string(int i) _const_; +int signal_from_string(const char *s) _pure_; int signal_from_string_try_harder(const char *s); @@ -491,13 +565,13 @@ extern char **saved_argv; bool kexec_loaded(void); -int prot_from_flags(int flags); +int prot_from_flags(int flags) _const_; char *format_bytes(char *buf, size_t l, off_t t); int fd_wait_for_event(int fd, int event, usec_t timeout); -void* memdup(const void *p, size_t l) _malloc_; +void* memdup(const void *p, size_t l) _alloc_(2); int is_kernel_thread(pid_t pid); @@ -510,40 +584,79 @@ int setrlimit_closest(int resource, const struct rlimit *rlim); int getenv_for_pid(pid_t pid, const char *field, char **_value); -int can_sleep(const char *type); -int can_sleep_disk(const char *type); - -bool is_valid_documentation_url(const char *url); +bool is_valid_documentation_url(const char *url) _pure_; bool in_initrd(void); void warn_melody(void); -int get_shell(char **ret); int get_home_dir(char **ret); +int get_shell(char **_ret); + +static inline void freep(void *p) { + free(*(void**) p); +} -void freep(void *p); -void fclosep(FILE **f); -void closep(int *fd); -void closedirp(DIR **d); -void umaskp(mode_t *u); +#define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \ + static inline void func##p(type *p) { \ + if (*p) \ + func(*p); \ + } \ + struct __useless_struct_to_allow_trailing_semicolon__ + +static inline void closep(int *fd) { + if (*fd >= 0) + close_nointr_nofail(*fd); +} + +static inline void umaskp(mode_t *u) { + umask(*u); +} -_malloc_ static inline void *malloc_multiply(size_t a, size_t b) { +static inline void close_pipep(int (*p)[2]) { + close_pipe(*p); +} + +DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose); +DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose); +DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir); +DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent); + +#define _cleanup_free_ _cleanup_(freep) +#define _cleanup_close_ _cleanup_(closep) +#define _cleanup_umask_ _cleanup_(umaskp) +#define _cleanup_globfree_ _cleanup_(globfree) +#define _cleanup_fclose_ _cleanup_(fclosep) +#define _cleanup_pclose_ _cleanup_(pclosep) +#define _cleanup_closedir_ _cleanup_(closedirp) +#define _cleanup_endmntent_ _cleanup_(endmntentp) +#define _cleanup_close_pipe_ _cleanup_(close_pipep) + +_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); } -_malloc_ static inline void *memdup_multiply(const void *p, size_t a, size_t 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); } -bool filename_is_safe(const char *p); -bool string_is_safe(const char *p); +bool filename_is_safe(const char *p) _pure_; +bool path_is_safe(const char *p) _pure_; +bool string_is_safe(const char *p) _pure_; +bool string_has_cc(const char *p) _pure_; + +/** + * 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 *), @@ -555,7 +668,9 @@ typedef enum DrawSpecialChar { DRAW_TREE_VERT, DRAW_TREE_BRANCH, DRAW_TREE_RIGHT, + DRAW_TREE_SPACE, DRAW_TRIANGULAR_BULLET, + DRAW_BLACK_CIRCLE, _DRAW_SPECIAL_CHAR_MAX } DrawSpecialChar; const char *draw_special_char(DrawSpecialChar ch); @@ -565,3 +680,191 @@ char *strreplace(const char *text, const char *old_string, const char *new_strin char *strip_tab_ansi(char **p, size_t *l); int on_ac_power(void); + +int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f); +int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f); + +#define FOREACH_LINE(line, f, on_error) \ + for (;;) \ + if (!fgets(line, sizeof(line), f)) { \ + if (ferror(f)) { \ + on_error; \ + } \ + break; \ + } else + +#define FOREACH_DIRENT(de, d, on_error) \ + for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \ + if (!de) { \ + if (errno > 0) { \ + on_error; \ + } \ + break; \ + } else if (ignore_file((de)->d_name)) \ + continue; \ + else + +static inline void *mempset(void *s, int c, size_t n) { + memset(s, c, n); + return (uint8_t*)s + n; +} + +char *hexmem(const void *p, size_t l); +void *unhexmem(const char *p, size_t l); + +char *strextend(char **x, ...) _sentinel_; +char *strrep(const char *s, unsigned n); + +void* greedy_realloc(void **p, size_t *allocated, size_t need); +void* greedy_realloc0(void **p, size_t *allocated, size_t need); +#define GREEDY_REALLOC(array, allocated, need) \ + greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need)) +#define GREEDY_REALLOC0(array, allocated, need) \ + greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need)) + +static inline void _reset_errno_(int *saved_errno) { + errno = *saved_errno; +} + +#define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno + +struct _umask_struct_ { + mode_t mask; + bool quit; +}; + +static inline void _reset_umask_(struct _umask_struct_ *s) { + umask(s->mask); +}; + +#define RUN_WITH_UMASK(mask) \ + for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \ + !_saved_umask_.quit ; \ + _saved_umask_.quit = true) + +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 bool logind_running(void) { + return access("/run/systemd/seats/", F_OK) >= 0; +} + +#define DECIMAL_STR_WIDTH(x) \ + ({ \ + typeof(x) _x_ = (x); \ + unsigned ans = 1; \ + while (_x_ /= 10) \ + ans++; \ + ans; \ + }) + +int unlink_noerrno(const char *path); + +#define alloca0(n) \ + ({ \ + char *_new_; \ + size_t _len_ = n; \ + _new_ = alloca(_len_); \ + (void *) memset(_new_, 0, _len_); \ + }) + +#define strappenda(a, b) \ + ({ \ + const char *_a_ = (a), *_b_ = (b); \ + char *_c_; \ + size_t _x_, _y_; \ + _x_ = strlen(_a_); \ + _y_ = strlen(_b_); \ + _c_ = alloca(_x_ + _y_ + 1); \ + strcpy(stpcpy(_c_, _a_), _b_); \ + _c_; \ + }) + +#define procfs_file_alloca(pid, field) \ + ({ \ + pid_t _pid_ = (pid); \ + const char *_r_; \ + if (_pid_ == 0) { \ + _r_ = ("/proc/self/" field); \ + } else { \ + _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \ + sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \ + } \ + _r_; \ + }) + +struct _locale_struct_ { + locale_t saved_locale; + locale_t new_locale; + bool quit; +}; + +static inline void _reset_locale_(struct _locale_struct_ *s) { + PROTECT_ERRNO; + if (s->saved_locale != (locale_t) 0) + uselocale(s->saved_locale); + if (s->new_locale != (locale_t) 0) + freelocale(s->new_locale); +} + +#define RUN_WITH_LOCALE(mask, loc) \ + for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \ + ({ \ + if (!_saved_locale_.quit) { \ + PROTECT_ERRNO; \ + _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \ + if (_saved_locale_.new_locale != (locale_t) 0) \ + _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \ + } \ + !_saved_locale_.quit; }) ; \ + _saved_locale_.quit = true) + +bool id128_is_valid(const char *s) _pure_; + +int split_pair(const char *s, const char *sep, char **l, char **r); + +int shall_restore_state(void); + +/** + * 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, + int (*compar)(const void *, const void *)) { + if (nmemb) { + assert(base); + qsort(base, nmemb, size, compar); + } +} + +int proc_cmdline(char **ret); + +int container_get_leader(const char *machine, pid_t *pid); + +int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd); +int namespace_enter(int pidns_fd, int mntns_fd, int root_fd); + +bool pid_valid(pid_t pid); + +int getpeercred(int fd, struct ucred *ucred); +int getpeersec(int fd, char **ret); + +int writev_safe(int fd, const struct iovec *w, int j); + +int mkostemp_safe(char *pattern, int flags); +int open_tmpfile(const char *path, int flags); + +int fd_warn_permissions(const char *path, int fd);