程序4-3 umask函数实例

 1 //http://blog.chinaunix.net/uid-24549279-id-71355.html
 2 /*
 3  ============================================================================
 4  Name        : test.c
 5  Author      : blank
 6  Version     :
 7  Copyright   : Your copyright notice
 8  Description : 程序4-3 umask函数实例
 9  ============================================================================
10 */
11 
12 #include <fcntl.h>
13 #include "ourhdr.h"
14 
15 #define RWRWRW (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
16 
17 int main(int argc, char *argv[])
18 {
19     umask(0);
20 
21     if (creat("foo", RWRWRW) < 0){
22         err_sys("create error for foo");
23     }
24 
25     umask(S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
26     if (creat("bar", RWRWRW) < 0){
27         err_sys("creat error for bar");
28     }
29     exit(0);
30 }