*
* Usage: forktest -h give all info's
*
- * $Id: ForkTest.c,v 1.2 2001/09/09 22:45:34 piccardi Exp $
+ * $Id: ForkTest.c,v 1.4 2001/09/14 22:16:41 piccardi Exp $
*
****************************************************************/
/*
/*
* Variables definition
*/
- int i;
- int nchild;
+ int nchild, i;
pid_t pid;
+ int wait_child=0;
+ int wait_parent=0;
/*
* Input section: decode command line parameters
* Use getopt function
*/
opterr = 0; /* don't want writing to stderr */
- while ( (i = getopt(argc, argv, "h")) != -1) {
+ while ( (i = getopt(argc, argv, "hp:c:")) != -1) {
switch (i) {
/*
* Handling options
*/
- case 'h':
+ case 'h': /* help option */
printf("Wrong -h option use\n");
usage();
- return(0);
+ return -1;
+ break;
+ case 'c': /* take wait time for childen */
+ wait_child=strtol(optarg, NULL, 10); /* convert input */
+ break;
+ case 'p': /* take wait time for childen */
+ wait_parent=strtol(optarg, NULL, 10); /* convert input */
break;
case '?': /* unrecognized options */
printf("Unrecognized options -%c\n",optopt);
printf("Test for forking %d child\n", nchild);
/* loop to fork children */
for (i=0; i<nchild; i++) {
- if ( (pid = fork()) < 0) {
+ if ( (pid = fork()) < 0) {
+ /* on error exit */
printf("Error on %d child creation, %s\n", i+1, strerror(errno));
+ exit(-1);
}
if (pid == 0) { /* child */
printf("Child %d successfully executing\n", ++i);
- sleep(2);
+ if (wait_child) sleep(wait_child);
printf("Child %d exiting\n", i);
exit(0);
} else { /* parent */
printf("Spawned %d child, pid %d \n", i+1, pid);
+ if (wait_parent) sleep(wait_parent);
+ printf("Go to next child \n");
}
}
/* normal exit */