Fix cap_copy_int(), add two functions cap_get_pid() and cap_compare()

Test new and old function with modified test.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/libcap/cap_proc.c b/libcap/cap_proc.c
index 61c5b12..7a6af39 100644
--- a/libcap/cap_proc.c
+++ b/libcap/cap_proc.c
@@ -62,6 +62,27 @@ int capgetp(pid_t pid, cap_t cap_d)
     return error;
 }
 
+/* allocate space for and return capabilities of target process */
+
+cap_t cap_get_pid(pid_t pid)
+{
+    cap_t result;
+
+    result = cap_init();
+    if (result) {
+	if (capgetp(pid, result) != 0) {
+	    int my_errno;
+
+	    my_errno = errno;
+	    cap_free(result);
+	    errno = my_errno;
+	    result = NULL;
+	}
+    }
+
+    return result;
+}
+
 /* set the caps on a specific process/pg etc.. */
 
 int capsetp(pid_t pid, cap_t cap_d)