books/apue/popen.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4
   5 int main(int argc, char *argv[])
   6 {
   7         FILE *file;
   8         char buf[1024];
   9
  10         file = popen("ls *.c", "r");
  11         if (!file) {
  12                 perror("open()");
  13                 exit(1);
  14         }
  15
  16         memset(buf, '\0', sizeof(buf));
  17         while (fgets(buf, sizeof(buf), file) != NULL) {
  18                 printf("%s", buf);
  19                 memset(buf, '\0', sizeof(buf));
  20         }
  21
  22         pclose(file);
  23         return 0;
  24 }