X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Futil.c;h=7f5fa05dca4d1beb15da5b82db6a6792198dec9b;hb=71a6f7538199f571b92e0c9fbb5819f8ce0e0d20;hp=6cbc7ce4770c5e232ae72fd54b48b6b1ffc45283;hpb=301056b7a0e7c6b36f1277c0a776d5bb509844cf;p=elogind.git

diff --git a/src/util.c b/src/util.c
index 6cbc7ce47..7f5fa05dc 100644
--- a/src/util.c
+++ b/src/util.c
@@ -609,6 +609,9 @@ int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
 
         fclose(f);
 
+        if (r[0] == 0)
+                return get_process_name(pid, line);
+
         *line = r;
         return 0;
 }
@@ -2798,6 +2801,49 @@ char **replace_env_argv(char **argv, char **env) {
         return r;
 }
 
+int columns(void) {
+        static __thread int parsed_columns = 0;
+        const char *e;
+
+        if (parsed_columns > 0)
+                return parsed_columns;
+
+        if ((e = getenv("COLUMNS")))
+                parsed_columns = atoi(e);
+
+        if (parsed_columns <= 0) {
+                struct winsize ws;
+                zero(ws);
+
+                if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) >= 0)
+                        parsed_columns = ws.ws_col;
+        }
+
+        if (parsed_columns <= 0)
+                parsed_columns = 80;
+
+        return parsed_columns;
+}
+
+int running_in_chroot(void) {
+        struct stat a, b;
+
+        zero(a);
+        zero(b);
+
+        /* Only works as root */
+
+        if (stat("/proc/1/root", &a) < 0)
+                return -errno;
+
+        if (stat("/", &b) < 0)
+                return -errno;
+
+        return
+                a.st_dev != b.st_dev ||
+                a.st_ino != b.st_ino;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",