nspawn: set env var container=systemd-nspawn, following the scheme lxc introduced

[elogind.git] / src / util.c

diff --git a/src/util.c b/src/util.c
index ecfe450dcac5dd3c8bf33497ec8759b7f2d80cb8..36c8938c2f7d932f26ef0344aa6eabad97a655db 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -782,13 +782,7 @@ int read_full_file(const char *fn, char **contents, size_t *size) {
                 }
         }
 
-        if (buf)
-                buf[l] = 0;
-        else if (!(buf = calloc(1, 1))) {
-                r = -errno;
-                goto finish;
-        }
-
+        buf[l] = 0;
         *contents = buf;
         buf = NULL;
 
@@ -2895,19 +2889,25 @@ ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
         return n;
 }
 
-int path_is_mount_point(const char *t) {
+int path_is_mount_point(const char *t, bool allow_symlink) {
         struct stat a, b;
         char *parent;
         int r;
 
-        if (lstat(t, &a) < 0) {
+        if (allow_symlink)
+                r = stat(t, &a);
+        else
+                r = lstat(t, &a);
+
+        if (r < 0) {
                 if (errno == ENOENT)
                         return 0;
 
                 return -errno;
         }
 
-        if ((r = parent_of_path(t, &parent)) < 0)
+        r = parent_of_path(t, &parent);
+        if (r < 0)
                 return r;
 
         r = lstat(parent, &b);
@@ -3475,7 +3475,7 @@ int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky
                 if (honour_sticky && file_is_sticky(path) > 0)
                         return r;
 
-                if (rmdir(path) < 0) {
+                if (rmdir(path) < 0 && errno != ENOENT) {
                         if (r == 0)
                                 r = -errno;
                 }
@@ -5523,6 +5523,9 @@ int get_files_in_directory(const char *path, char ***list) {
          * number */
 
         d = opendir(path);
+        if (!d)
+                return -errno;
+
         for (;;) {
                 struct dirent buffer, *de;
                 int k;
@@ -5623,6 +5626,8 @@ char *join(const char *x, ...) {
 
                         p = stpcpy(p, t);
                 }
+
+                va_end(ap);
         } else
                 r[0] = 0;
 
@@ -5809,7 +5814,7 @@ static const char* const ip_tos_table[] = {
 
 DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
 
-static const char *const signal_table[] = {
+static const char *const __signal_table[] = {
         [SIGHUP] = "HUP",
         [SIGINT] = "INT",
         [SIGQUIT] = "QUIT",
@@ -5845,4 +5850,53 @@ static const char *const signal_table[] = {
         [SIGSYS] = "SYS"
 };
 
-DEFINE_STRING_TABLE_LOOKUP(signal, int);
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int);
+
+const char *signal_to_string(int signo) {
+        static __thread char buf[12];
+        const char *name;
+
+        name = __signal_to_string(signo);
+        if (name)
+                return name;
+
+        if (signo >= SIGRTMIN && signo <= SIGRTMAX)
+                snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN);
+        else
+                snprintf(buf, sizeof(buf) - 1, "%d", signo);
+        char_array_0(buf);
+        return buf;
+}
+
+int signal_from_string(const char *s) {
+        int signo;
+        int offset = 0;
+        unsigned u;
+
+        signo =__signal_from_string(s);
+        if (signo > 0)
+                return signo;
+
+        if (startswith(s, "RTMIN+")) {
+                s += 6;
+                offset = SIGRTMIN;
+        }
+        if (safe_atou(s, &u) >= 0) {
+                signo = (int) u + offset;
+                if (signo > 0 && signo < _NSIG)
+                        return signo;
+        }
+        return -1;
+}
+
+bool kexec_loaded(void) {
+       bool loaded = false;
+       char *s;
+
+       if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
+               if (s[0] == '1')
+                       loaded = true;
+               free(s);
+       }
+       return loaded;
+}