3 * Copyright (C) 2001 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /****************************************************************
22 * Program to test process creation
24 * Author: Simone Piccardi
27 * Usage: forktest -h give all info's
29 * $Id: ForkTest.c,v 1.2 2001/09/09 22:45:34 piccardi Exp $
31 ****************************************************************/
33 * Include needed headers
35 #include <errno.h> /* error definitions and routines */
36 #include <stdlib.h> /* C standard library */
37 #include <unistd.h> /* unix standard library */
38 #include <stdio.h> /* standard I/O library */
39 #include <string.h> /* string functions */
41 /* Help printing routine */
44 int main(int argc, char *argv[])
47 * Variables definition
53 * Input section: decode command line parameters
56 opterr = 0; /* don't want writing to stderr */
57 while ( (i = getopt(argc, argv, "h")) != -1) {
63 printf("Wrong -h option use\n");
67 case '?': /* unrecognized options */
68 printf("Unrecognized options -%c\n",optopt);
70 default: /* should not reached */
74 /* ***********************************************************
76 * Options processing completed
80 * ***********************************************************/
81 /* There must be remaing parameters */
85 nchild = atoi(argv[optind]);
86 printf("Test for forking %d child\n", nchild);
87 /* loop to fork children */
88 for (i=0; i<nchild; i++) {
89 if ( (pid = fork()) < 0) {
90 printf("Error on %d child creation, %s\n", i+1, strerror(errno));
92 if (pid == 0) { /* child */
93 printf("Child %d successfully executing\n", ++i);
95 printf("Child %d exiting\n", i);
98 printf("Spawned %d child, pid %d \n", i+1, pid);
105 * routine to print usage info and exit
108 printf("Program forktest: fork a given number of child \n");
110 printf(" forktest [-h] child to fork \n");
111 printf(" -h print this help\n");