X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2FForkTest.c;h=03ddf75eadfe4c37ab7536cbe7d4e0401a0fcc1b;hp=da38629b41892b6be703821222303d4da4073576;hb=da8455a295d5e2e237711cd930b7052f1b30ea38;hpb=0d1802dcd969187e6133ba143ebc473c9fefc259

diff --git a/sources/ForkTest.c b/sources/ForkTest.c
index da38629..03ddf75 100644
--- a/sources/ForkTest.c
+++ b/sources/ForkTest.c
@@ -1,3 +1,21 @@
+/* ForkTest.c
+ * 
+ * Copyright (C) 2001 Simone Piccardi
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
 /****************************************************************
  *
  * Program ForkTest.c: 
@@ -8,7 +26,7 @@
  *
  * Usage: forktest -h give all info's
  *
- * $Id: ForkTest.c,v 1.1 2001/09/09 17:39:15 piccardi Exp $
+ * $Id: ForkTest.c,v 1.6 2001/09/21 17:10:51 piccardi Exp $
  *
  ****************************************************************/
 /* 
@@ -28,23 +46,34 @@ int main(int argc, char *argv[])
 /* 
  * Variables definition  
  */
-    int i;
-    int nchild;
+    int nchild, i;
     pid_t pid;
+    int wait_child  = 0;
+    int wait_parent = 0;
+    int wait_end    = 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:e:")) != -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 'e':   /* take wait before parent exit */
+	    wait_end = strtol(optarg, NULL, 10);      /* convert input */
 	    break;
 	case '?':   /* unrecognized options */
 	    printf("Unrecognized options -%c\n",optopt);
@@ -65,22 +94,27 @@ int main(int argc, char *argv[])
 	usage();
     }
     nchild = atoi(argv[optind]);
-    printf("Test for forking %d child\n", nchild);
+    printf("Process %d: forking %d child\n", getpid(), nchild);
     /* loop to fork children */
     for (i=0; i<nchild; i++) {
-	if ( (pid = fork()) < 0) {
-	    printf("Error on %d child creation, %s\n", i, strerror(errno));
+	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);
-	    printf("Child %d exiting\n", i);
+	    printf("Child %d successfully executing\n", ++i);
+	    if (wait_child) sleep(wait_child);
+	    printf("Child %d, parent %d, exiting\n", i, getppid());
 	    exit(0);
 	} else {          /* parent */
-	    printf("Spawned %d child, pid %d \n", i, pid);
+	    printf("Spawned %d child, pid %d \n", i+1, pid);
+	    if (wait_parent) sleep(wait_parent);
+	    printf("Go to next child \n");
 	}
     }
     /* normal exit */
+    if (wait_end) sleep(wait_end);
     return 0;
 }
 /*
@@ -89,7 +123,11 @@ int main(int argc, char *argv[])
 void usage(void) {
     printf("Program forktest: fork a given number of child \n");
     printf("Usage:\n");
-    printf("  forktest [-h] child to fork \n");
+    printf("  forktest [-h] [-p sec] [-c sec] [-e sec] child to fork \n");
     printf("  -h	   print this help\n");
+    printf("  -p sec       wait sec seconds before next fork\n");
+    printf("  -c sec       wait sec seconds before child termination\n");
+    printf("  -e sec       wait sec seconds before parent return\n");
+    
     exit(1);
 }