Initial Contribution

1 files changed, 51 insertions, 0 deletions

diff --git a/toolbox/id.c b/toolbox/id.c
new file mode 100644
index 00000000..bb03cad2
--- /dev/null
+++ b/toolbox/id.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+
+static void print_uid(uid_t uid)
+{
+    struct passwd *pw = getpwuid(uid);
+
+    if (pw) {
+        printf("%d(%s)", uid, pw->pw_name);
+    } else {
+        printf("%d",uid);
+    }
+}
+
+static void print_gid(gid_t gid)
+{
+    struct group *gr = getgrgid(gid);
+    if (gr) {
+        printf("%d(%s)", gid, gr->gr_name);
+    } else {
+        printf("%d",gid);
+    }
+}
+
+int id_main(int argc, char **argv)
+{
+    gid_t list[64];
+    int n, max;
+
+    max = getgroups(64, list);
+    if (max < 0) max = 0;
+
+    printf("uid=");
+    print_uid(getuid());
+    printf(" gid=");
+    print_gid(getgid());
+    if (max) {
+        printf(" groups=");
+        print_gid(list[0]);
+        for(n = 1; n < max; n++) {
+            printf(",");
+            print_gid(list[n]);
+        }
+    }
+    printf("\n");
+    return 0;
+}