test/test10.c

   1 /* test 10 */
   2
   3 #include <sys/types.h>
   4 #include <sys/wait.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <stdlib.h>
   8 #include <unistd.h>
   9 #include <stdio.h>
  10
  11 char *name[] = {"t10a", "t10b", "t10c", "t10d", "t10e", "t10f", "t10g",
  12                                                       "t10h", "t10i", "t10j"};
  13
  14 #define PROGBUF_LONGS 3000
  15 long prog[PROGBUF_LONGS];
  16 int psize;
  17
  18 int max_error = 2;
  19 #include "common.h"
  20
  21
  22 int main(void);
  23 void spawn(int n);
  24 void mkfiles(void);
  25 void cr_file(char *name, int size);
  26 void rmfiles(void);
  27 void quit(void);
  28
  29 int main()
  30 {
  31   int i, n, pid, r;
  32
  33   start(10);
  34   system("cp ../t10a .");
  35   pid = getpid();
  36
  37   /* Create files t10b ... t10h */
  38   mkfiles();
  39
  40   if (getpid() == pid)
  41         if (fork() == 0) {
  42                 execl("t10a", "t10a", (char *) 0);
  43                 exit(0);
  44         }
  45   if (getpid() == pid)
  46         if (fork() == 0) {
  47                 execl("t10b", "t10b", (char *) 0);
  48                 exit(0);
  49         }
  50   if (getpid() == pid)
  51         if (fork() == 0) {
  52                 execl("t10c", "t10c", (char *) 0);
  53                 exit(0);
  54         }
  55   if (getpid() == pid)
  56         if (fork() == 0) {
  57                 execl("t10d", "t10d", (char *) 0);
  58                 exit(0);
  59         }
  60
  61   srand(100);
  62   for (i = 0; i < 60; i++) {
  63         r = rand() & 07;
  64         spawn(r);
  65   }
  66
  67   for (i = 0; i < 4; i++) wait(&n);
  68   rmfiles();
  69   quit();
  70   return(-1);                   /* impossible */
  71 }
  72
  73 void spawn(n)
  74 int n;
  75 {
  76   int pid;
  77
  78   if ((pid = fork()) != 0) {
  79         wait(&n);               /* wait for some child (any one) */
  80   } else {
  81         /* a successful exec or a successful detection of a broken executable
  82          * is ok
  83          */
  84         if(execl(name[n], name[n], (char *) 0) < 0 && errno == ENOEXEC)
  85                 exit(0);
  86         errct++;
  87         printf("Child execl didn't take. file=%s errno=%d\n", name[n], errno);
  88         rmfiles();
  89         exit(1);
  90         printf("Worse yet, EXIT didn't exit\n");
  91   }
  92 }
  93
  94 void mkfiles()
  95 {
  96   int fd;
  97   fd = open("t10a", 0);
  98   if (fd < 0) {
  99         printf("Can't open t10a\n");
 100         exit(1);
 101   }
 102   psize = read(fd, (char *) prog, PROGBUF_LONGS * 4);
 103   cr_file("t10b", 1600);
 104   cr_file("t10c", 1400);
 105   cr_file("t10d", 2300);
 106   cr_file("t10e", 3100);
 107   cr_file("t10f", 2400);
 108   cr_file("t10g", 1700);
 109   cr_file("t10h", 1500);
 110   cr_file("t10i", 4000);
 111   cr_file("t10j", 2250);
 112   close(fd);
 113 }
 114
 115 void cr_file(name, size)
 116 char *name;
 117 int size;
 118
 119 {
 120   int fd;
 121
 122   size += 3000;
 123   fd = creat(name, 0755);
 124   write(fd, (char *) prog, psize);
 125   close(fd);
 126 }
 127
 128 void rmfiles()
 129 {
 130   unlink("t10b");
 131   unlink("t10c");
 132   unlink("t10d");
 133   unlink("t10e");
 134   unlink("t10f");
 135   unlink("t10g");
 136   unlink("t10h");
 137   unlink("t10i");
 138   unlink("t10j");
 139 }
 140