refactor: change return types of IP and MAC validation functions to b…

…ool and add is_file_exist function

Signed-off-by: Dengfeng Liu <[email protected]>

src/util.c

@@ -218,30 +218,29 @@ save_pid_file(const char *pf)
     return;
 }
 
-// true: 1; false: 0
-int
+bool
 is_valid_ip(const char *ip)
 {
 	if (!ip) {
-		return 0;
+		return false;
 	}
 	struct sockaddr_in sa;
     int result = inet_pton(AF_INET, ip, &(sa.sin_addr));
     return result != 0;
 }
 
-int
+bool
 is_valid_ip6(const char *ip)
 {
 	if (!ip) {
-		return 0;
+		return false;
 	}
 	struct sockaddr_in6 sa;
 	int result = inet_pton(AF_INET6, ip, &(sa.sin6_addr));
 	return result != 0;
 }
 
-int 
+bool 
 is_valid_mac(const char *mac)
 {
 	int i = 0;
@@ -354,3 +353,12 @@ get_cpu_usage()
 
 	return percent_usage;
 }
+
+bool
+is_file_exist(const char *file)
+{
+	struct stat buf;
+	if(stat(file, &buf) == 0)
+		return true;
+	return false;
+}

src/util.h

@@ -7,8 +7,7 @@
 #ifndef _UTIL_H_
 #define _UTIL_H_
 
-#include <sys/types.h>
-#include <sys/socket.h>
+#include <stdbool.h>
 
 /** @brief Initialize the ICMP socket */
 int init_icmp_socket(void);
@@ -24,12 +23,14 @@ void icmp6_ping(const char *);
 /** @brief Save pid of this wifidog in pid file */
 void save_pid_file(const char *);
 
-int is_valid_ip(const char *);
+bool is_valid_ip(const char *);
 
-int is_valid_ip6(const char *);
+bool is_valid_ip6(const char *);
 
-int is_valid_mac(const char *);
+bool is_valid_mac(const char *);
 
 float get_cpu_usage();
 
+bool is_file_exist(const char *file);
+
 #endif                          /* _UTIL_H_ */