POTD skeleton #55.

Signed-off-by: lns <matzeton@googlemail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
index bcca9c3..69fcb0e 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -386,3 +386,21 @@ int create_device_files(const char *mount_path)
 
     return s;
 }
+
+int update_uid_map(pid_t pid, unsigned int uid_map[3])
+{
+    int s;
+    const char *const path_pid = "/proc/%d/uid_map";
+    const char *const path_self = "/proc/self/uid_map";
+    char path[32];
+
+    if (pid < 0) {
+        s = snprintf(path, sizeof path, "%s", path_self);
+    } else {
+        s = snprintf(path, sizeof path, path_pid, pid);
+    }
+    if (s <= 0)
+        return 1;
+
+    return 0;
+}