Move set_cap() to ncmlib/cap.[ch].

ndhc/CMakeLists.txt

@@ -8,7 +8,6 @@ set(NDHC_SRCS
   packet.c
   script.c
   clientpacket.c
-  rootcap.c
   dhcpc.c
   )
 

ndhc/dhcpc.c

@@ -36,8 +36,6 @@
 #include <sys/ioctl.h>
 #include <net/if.h>
 #include <errno.h>
-#include <sys/capability.h>
-#include <sys/prctl.h>
 #include <pwd.h>
 #include <grp.h>
 
@@ -50,7 +48,7 @@
 #include "socket.h"
 #include "log.h"
 #include "chroot.h"
-#include "rootcap.h"
+#include "cap.h"
 #include "strl.h"
 
 #define VERSION "1.0"

ndhc/rootcap.c

@@ -1,46 +0,0 @@
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/capability.h>
-#include <sys/prctl.h>
-#include <grp.h>
-
-#include "log.h"
-
-void set_cap(uid_t uid, gid_t gid, char *captxt)
-{
-    cap_t caps;
-
-    if (!captxt) {
-        log_error("FATAL - set_cap: captxt == NULL");
-        exit(EXIT_FAILURE);
-    }
-
-    if (prctl(PR_SET_KEEPCAPS, 1)) {
-        log_error("FATAL - set_cap: prctl() failed");
-        exit(EXIT_FAILURE);
-    }
-
-    if (setgroups(0, NULL) == -1) {
-            log_error("FATAL - set_cap: setgroups() failed");
-            exit(EXIT_FAILURE);
-    }
-
-    if (setegid(gid) == -1 || seteuid(uid) == -1) {
-            log_error("FATAL - set_cap: seteuid() failed");
-            exit(EXIT_FAILURE);
-    }
-
-    caps = cap_from_text(captxt);
-    if (!caps) {
-        log_error("FATAL - set_cap: cap_from_text() failed");
-        exit(EXIT_FAILURE);
-    }
-
-    if (cap_set_proc(caps) == -1) {
-        log_error("FATAL - set_cap: cap_set_proc() failed");
-        exit(EXIT_FAILURE);
-    }
-
-    cap_free(caps);
-}

ndhc/rootcap.h

@@ -1,6 +0,0 @@
-#ifndef ROOTCAP_H_
-#define ROOTCAP_H_
-
-void set_cap(uid_t uid, gid_t gid, char *captxt);
-
-#endif /* ROOTCAP_H_ */