resolved: read the system /etc/resolv.conf unless we wrote it ourselves

[elogind.git] / src / shared / util.h

diff --git a/src/shared/util.h b/src/shared/util.h
index 7a7d15c82c39638c5925ea910cce19377d80d165..fd999bd9426f709b21a4568e8b2dd95c1c04cef7 100644 (file)
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -93,6 +93,12 @@
 #define COMMENTS   "#;"
 #define GLOB_CHARS "*?["
 
+/* What characters are special in the shell? */
+/* must be escaped outside and inside double-quotes */
+#define SHELL_NEED_ESCAPE "\"\\`$"
+/* can be escaped or double-quoted */
+#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
+
 #define FORMAT_BYTES_MAX 8
 
 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
@@ -163,7 +169,7 @@ static inline const char *startswith_no_case(const char *s, const char *prefix)
 
 char *endswith(const char *s, const char *postfix) _pure_;
 
-bool first_word(const char *s, const char *word) _pure_;
+char *first_word(const char *s, const char *word) _pure_;
 
 int close_nointr(int fd);
 int safe_close(int fd);
@@ -186,6 +192,8 @@ int safe_atolli(const char *s, long long int *ret_i);
 
 int safe_atod(const char *s, double *ret_d);
 
+int safe_atou8(const char *s, uint8_t *ret);
+
 #if __WORDSIZE == 32
 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
         assert_cc(sizeof(unsigned long) == sizeof(unsigned));
@@ -226,7 +234,7 @@ 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, bool quoted, char **state);
+const char* split(const char **state, size_t *l, const char *separator, bool quoted);
 
 #define FOREACH_WORD(word, length, s, state)                            \
         _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
@@ -241,7 +249,7 @@ char *split(const char *c, size_t *l, const char *separator, bool quoted, char *
         _FOREACH_WORD(word, length, s, separator, true, state)
 
 #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)))
+        for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
 
 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
@@ -252,6 +260,7 @@ char *strnappend(const char *s, const char *suffix, size_t length);
 char *replace_env(const char *format, char **env);
 char **replace_env_argv(char **argv, char **env);
 
+int readlinkat_malloc(int fd, const char *p, char **ret);
 int readlink_malloc(const char *p, char **r);
 int readlink_and_make_absolute(const char *p, char **r);
 int readlink_and_canonicalize(const char *p, char **r);
@@ -381,7 +390,8 @@ 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, ...) _printf_(3, 4);
+int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
+int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
 
 int reset_terminal_fd(int fd, bool switch_to_text);
 int reset_terminal(const char *name);
@@ -478,6 +488,7 @@ 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_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
 int touch(const char *path);
 
 char *unquote(const char *s, const char *quotes);
@@ -490,6 +501,7 @@ noreturn void freeze(void);
 
 bool null_or_empty(struct stat *st) _pure_;
 int null_or_empty_path(const char *fn);
+int null_or_empty_fd(int fd);
 
 DIR *xopendirat(int dirfd, const char *name, int flags);
 
@@ -513,6 +525,8 @@ bool plymouth_running(void);
 bool hostname_is_valid(const char *s) _pure_;
 char* hostname_cleanup(char *s, bool lowercase);
 
+bool machine_name_is_valid(const char *s) _pure_;
+
 char* strshorten(char *s, size_t l);
 
 int terminal_vhangup_fd(int fd);
@@ -520,9 +534,9 @@ int terminal_vhangup(const char *name);
 
 int vt_disallocate(const char *name);
 
-int copy_file(const char *from, const char *to, int flags);
-
 int symlink_atomic(const char *from, const char *to);
+int mknod_atomic(const char *path, mode_t mode, dev_t dev);
+int mkfifo_atomic(const char *path, mode_t mode);
 
 int fchmod_umask(int fd, mode_t mode);
 
@@ -543,7 +557,6 @@ int glob_extend(char ***strv, const char *path);
 
 int dirent_ensure_type(DIR *d, struct dirent *de);
 
-int in_search_path(const char *path, char **search);
 int get_files_in_directory(const char *path, char ***list);
 
 char *strjoin(const char *x, ...) _sentinel_;
@@ -666,14 +679,21 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
 #define _cleanup_close_pair_ _cleanup_(close_pairp)
 
 _malloc_  _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
-        if (_unlikely_(b == 0 || a > ((size_t) -1) / 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))
+        if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
                 return NULL;
 
         return memdup(p, a * b);
@@ -682,7 +702,7 @@ _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_
 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_;
+bool string_has_cc(const char *p, const char *ok) _pure_;
 
 /**
  * Check if a string contains any glob patterns.
@@ -705,6 +725,7 @@ typedef enum DrawSpecialChar {
         DRAW_TRIANGULAR_BULLET,
         DRAW_BLACK_CIRCLE,
         DRAW_ARROW,
+        DRAW_DASH,
         _DRAW_SPECIAL_CHAR_MAX
 } DrawSpecialChar;
 
@@ -941,3 +962,16 @@ union file_handle_union {
 };
 
 int update_reboot_param_file(const char *param);
+
+int umount_recursive(const char *target, int flags);
+
+int bind_remount_recursive(const char *prefix, bool ro);
+
+int fflush_and_check(FILE *f);
+
+char *tempfn_xxxxxx(const char *p);
+char *tempfn_random(const char *p);
+
+bool is_localhost(const char *hostname);
+
+int take_password_lock(const char *root);