move cmd_exec to lib utils

Code move only; no functional change intended.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>

include/utils.h

@@ -256,4 +256,6 @@ char *int_to_str(int val, char *buf);
 int get_guid(__u64 *guid, const char *arg);
 int get_real_family(int rtm_type, int rtm_family);
 
+int cmd_exec(const char *cmd, char **argv, bool do_fork);
+
 #endif /* __UTILS_H__ */

ip/ipnetns.c

@@ -357,40 +357,6 @@ static int netns_list(int argc, char **argv)
 	return 0;
 }
 
-static int cmd_exec(const char *cmd, char **argv, bool do_fork)
-{
-	fflush(stdout);
-	if (do_fork) {
-		int status;
-		pid_t pid;
-
-		pid = fork();
-		if (pid < 0) {
-			perror("fork");
-			exit(1);
-		}
-
-		if (pid != 0) {
-			/* Parent  */
-			if (waitpid(pid, &status, 0) < 0) {
-				perror("waitpid");
-				exit(1);
-			}
-
-			if (WIFEXITED(status)) {
-				return WEXITSTATUS(status);
-			}
-
-			exit(1);
-		}
-	}
-
-	if (execvp(cmd, argv)  < 0)
-		fprintf(stderr, "exec of \"%s\" failed: %s\n",
-				cmd, strerror(errno));
-	_exit(1);
-}
-
 static int on_netns_exec(char *nsname, void *arg)
 {
 	char **argv = arg;

lib/Makefile

@@ -8,7 +8,7 @@ CFLAGS += -fPIC
 
 UTILOBJ = utils.o rt_names.o ll_types.o ll_proto.o ll_addr.o \
 	inet_proto.o namespace.o json_writer.o \
-	names.o color.o bpf.o
+	names.o color.o bpf.o exec.o
 
 NLOBJ=libgenl.o ll_map.o libnetlink.o
 

lib/exec.c

@@ -0,0 +1,40 @@
+#include <sys/wait.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+int cmd_exec(const char *cmd, char **argv, bool do_fork)
+{
+	fflush(stdout);
+	if (do_fork) {
+		int status;
+		pid_t pid;
+
+		pid = fork();
+		if (pid < 0) {
+			perror("fork");
+			exit(1);
+		}
+
+		if (pid != 0) {
+			/* Parent  */
+			if (waitpid(pid, &status, 0) < 0) {
+				perror("waitpid");
+				exit(1);
+			}
+
+			if (WIFEXITED(status)) {
+				return WEXITSTATUS(status);
+			}
+
+			exit(1);
+		}
+	}
+
+	if (execvp(cmd, argv)  < 0)
+		fprintf(stderr, "exec of \"%s\" failed: %s\n",
+				cmd, strerror(errno));
+	_exit(1);
+}