sd-login: beef up login api, to add monitoring and enumerating

[elogind.git] / src / util.c

diff --git a/src/util.c b/src/util.c
index 356b4f9de272d478b4fe0ae3dd7809872704b79c..2d4f2291932963fdfade7286741efe0d6d49deee 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -317,6 +317,26 @@ int parse_pid(const char *s, pid_t* ret_pid) {
         return 0;
 }
 
+int parse_uid(const char *s, uid_t* ret_uid) {
+        unsigned long ul = 0;
+        uid_t uid;
+        int r;
+
+        assert(s);
+        assert(ret_uid);
+
+        if ((r = safe_atolu(s, &ul)) < 0)
+                return r;
+
+        uid = (uid_t) ul;
+
+        if ((unsigned long) uid != ul)
+                return -ERANGE;
+
+        *ret_uid = uid;
+        return 0;
+}
+
 int safe_atou(const char *s, unsigned *ret_u) {
         char *x = NULL;
         unsigned long l;
@@ -1157,6 +1177,29 @@ int readlink_and_make_absolute(const char *p, char **r) {
         return 0;
 }
 
+int readlink_and_canonicalize(const char *p, char **r) {
+        char *t, *s;
+        int j;
+
+        assert(p);
+        assert(r);
+
+        j = readlink_and_make_absolute(p, &t);
+        if (j < 0)
+                return j;
+
+        s = canonicalize_file_name(t);
+        if (s) {
+                free(t);
+                *r = s;
+        } else
+                *r = t;
+
+        path_kill_slashes(*r);
+
+        return 0;
+}
+
 int parent_of_path(const char *path, char **_r) {
         const char *e, *a = NULL, *b = NULL, *p;
         char *r;
@@ -3866,8 +3909,12 @@ char *normalize_env_assignment(const char *s) {
 }
 
 int wait_for_terminate(pid_t pid, siginfo_t *status) {
+        siginfo_t dummy;
+
         assert(pid >= 1);
-        assert(status);
+
+        if (!status)
+                status = &dummy;
 
         for (;;) {
                 zero(*status);
@@ -3940,6 +3987,17 @@ bool null_or_empty(struct stat *st) {
         return false;
 }
 
+int null_or_empty_path(const char *fn) {
+        struct stat st;
+
+        assert(fn);
+
+        if (stat(fn, &st) < 0)
+                return -errno;
+
+        return null_or_empty(&st);
+}
+
 DIR *xopendirat(int fd, const char *name, int flags) {
         int nfd;
         DIR *d;
@@ -4763,7 +4821,7 @@ static int file_is_conf(const struct dirent *d, const char *suffix) {
 
 static int files_add(Hashmap *h, const char *path, const char *suffix) {
         DIR *dir;
-        struct dirent *de;
+        struct dirent buffer, *de;
         int r = 0;
 
         dir = opendir(path);
@@ -4773,9 +4831,18 @@ static int files_add(Hashmap *h, const char *path, const char *suffix) {
                 return -errno;
         }
 
-        for (de = readdir(dir); de; de = readdir(dir)) {
+        for (;;) {
+                int k;
                 char *p, *f;
-                const char *base;
+
+                k = readdir_r(dir, &buffer, &de);
+                if (k != 0) {
+                        r = -k;
+                        goto finish;
+                }
+
+                if (!de)
+                        break;
 
                 if (!file_is_conf(de, suffix))
                         continue;
@@ -4794,8 +4861,7 @@ static int files_add(Hashmap *h, const char *path, const char *suffix) {
                 free(p);
 
                 log_debug("found: %s\n", f);
-                base = f + strlen(path) + 1;
-                if (hashmap_put(h, base, f) <= 0)
+                if (hashmap_put(h, file_name_from_path(f), f) <= 0)
                         free(f);
         }
 
@@ -4901,7 +4967,7 @@ int hwclock_is_localtime(void) {
         return local;
 }
 
-int hwclock_apply_localtime_delta(void) {
+int hwclock_apply_localtime_delta(int *min) {
         const struct timeval *tv_null = NULL;
         struct timespec ts;
         struct tm *tm;
@@ -4922,8 +4988,9 @@ int hwclock_apply_localtime_delta(void) {
          */
         if (settimeofday(tv_null, &tz) < 0)
                 return -errno;
-
-        return minuteswest;
+        if (min)
+                *min = minuteswest;
+        return 0;
 }
 
 int hwclock_reset_localtime_delta(void) {
@@ -5263,6 +5330,117 @@ int glob_exists(const char *path) {
         return r;
 }
 
+int dirent_ensure_type(DIR *d, struct dirent *de) {
+        struct stat st;
+
+        assert(d);
+        assert(de);
+
+        if (de->d_type != DT_UNKNOWN)
+                return 0;
+
+        if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
+                return -errno;
+
+        de->d_type =
+                S_ISREG(st.st_mode)  ? DT_REG  :
+                S_ISDIR(st.st_mode)  ? DT_DIR  :
+                S_ISLNK(st.st_mode)  ? DT_LNK  :
+                S_ISFIFO(st.st_mode) ? DT_FIFO :
+                S_ISSOCK(st.st_mode) ? DT_SOCK :
+                S_ISCHR(st.st_mode)  ? DT_CHR  :
+                S_ISBLK(st.st_mode)  ? DT_BLK  :
+                                       DT_UNKNOWN;
+
+        return 0;
+}
+
+int in_search_path(const char *path, char **search) {
+        char **i, *parent;
+        int r;
+
+        r = parent_of_path(path, &parent);
+        if (r < 0)
+                return r;
+
+        r = 0;
+
+        STRV_FOREACH(i, search) {
+                if (path_equal(parent, *i)) {
+                        r = 1;
+                        break;
+                }
+        }
+
+        free(parent);
+
+        return r;
+}
+
+int get_files_in_directory(const char *path, char ***list) {
+        DIR *d;
+        int r = 0;
+        unsigned n = 0;
+        char **l = NULL;
+
+        assert(path);
+        assert(list);
+
+        d = opendir(path);
+        for (;;) {
+                struct dirent buffer, *de;
+                int k;
+
+                k = readdir_r(d, &buffer, &de);
+                if (k != 0) {
+                        r = -k;
+                        goto finish;
+                }
+
+                if (!de)
+                        break;
+
+                dirent_ensure_type(d, de);
+
+                if (!dirent_is_file(de))
+                        continue;
+
+                if ((unsigned) r >= n) {
+                        char **t;
+
+                        n = MAX(16, 2*r);
+                        t = realloc(l, sizeof(char*) * n);
+                        if (!t) {
+                                r = -ENOMEM;
+                                goto finish;
+                        }
+
+                        l = t;
+                }
+
+                assert((unsigned) r < n);
+
+                l[r] = strdup(de->d_name);
+                if (!l[r]) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                l[++r] = NULL;
+        }
+
+finish:
+        if (d)
+                closedir(d);
+
+        if (r >= 0)
+                *list = l;
+        else
+                strv_free(l);
+
+        return r;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",