Materiale sui flag della system call mount.

[gapil.git] / sources / ForkTest.c

diff --git a/sources/ForkTest.c b/sources/ForkTest.c
index 6f733876f528246abb75a03fd12198deccf48f31..1965ec8f4fd232420869bff4297d95fd3fcbbdac 100644 (file)
--- a/sources/ForkTest.c
+++ b/sources/ForkTest.c
@@ -26,8 +26,6 @@
  *
  * Usage: forktest -h give all info's
  *
- * $Id: ForkTest.c,v 1.3 2001/09/11 21:01:09 piccardi Exp $
- *
  ****************************************************************/
 /* 
  * Include needed headers
@@ -36,7 +34,10 @@
 #include <stdlib.h>      /* C standard library */
 #include <unistd.h>      /* unix standard library */
 #include <stdio.h>      /* standard I/O library */
-#include <string.h>      /* string functions */
+#include <string.h>      /* C strings library */
+
+#include "Gapil.h"
+#include "macros.h"
 
 /* Help printing routine */
 void usage(void);
@@ -46,23 +47,37 @@ 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, "hsp: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 's':
+           Signal(SIGCHLD, HandSigCHLD);
            break;
        case '?':   /* unrecognized options */
            printf("Unrecognized options -%c\n",optopt);
@@ -83,22 +98,27 @@ 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) {
+       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(3);
-           printf("Child %d exiting\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+1, pid);
+           if (wait_parent) sleep(wait_parent);
+           printf("Go to next child \n");
        }
     }
     /* normal exit */
+    if (wait_end) sleep(wait_end);
     return 0;
 }
 /*
@@ -107,7 +127,12 @@ 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("  -s          install signal handler\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);
 }