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-rw-r--r--config_test/child_test.c116
1 files changed, 59 insertions, 57 deletions
diff --git a/config_test/child_test.c b/config_test/child_test.c
index 2add3bcf..21439330 100644
--- a/config_test/child_test.c
+++ b/config_test/child_test.c
@@ -5,73 +5,75 @@
5#include <stdio.h> 5#include <stdio.h>
6#include <sys/types.h> 6#include <sys/types.h>
7#include <signal.h> 7#include <signal.h>
8void popen_sigchld_handler (int); 8void popen_sigchld_handler(int);
9int childtermd; 9int childtermd;
10 10
11int main(){ 11int main() {
12 char str[1024]; 12 char str[1024];
13 int pipefd[2]; 13 int pipefd[2];
14 pid_t pid; 14 pid_t pid;
15 int status, died; 15 int status, died;
16 16
17 if (signal (SIGCHLD, popen_sigchld_handler) == SIG_ERR) { 17 if (signal(SIGCHLD, popen_sigchld_handler) == SIG_ERR) {
18 printf ("Cannot catch SIGCHLD\n"); 18 printf("Cannot catch SIGCHLD\n");
19 _exit(-1); 19 _exit(-1);
20 } 20 }
21 21
22 pipe (pipefd); 22 pipe(pipefd);
23 switch(pid=fork()){ 23 switch (pid = fork()) {
24 case -1: 24 case -1:
25 printf("can't fork\n"); 25 printf("can't fork\n");
26 _exit(-1); 26 _exit(-1);
27 27
28 case 0 : /* this is the code the child runs */ 28 case 0: /* this is the code the child runs */
29 close(1); /* close stdout */ 29 close(1); /* close stdout */
30 /* pipefd[1] is for writing to the pipe. We want the output 30 /* pipefd[1] is for writing to the pipe. We want the output
31 * that used to go to the standard output (file descriptor 1) 31 * that used to go to the standard output (file descriptor 1)
32 * to be written to the pipe. The following command does this, 32 * to be written to the pipe. The following command does this,
33 * creating a new file descriptor 1 (the lowest available) 33 * creating a new file descriptor 1 (the lowest available)
34 * that writes where pipefd[1] goes. */ 34 * that writes where pipefd[1] goes. */
35 dup (pipefd[1]); /* points pipefd at file descriptor */ 35 dup(pipefd[1]); /* points pipefd at file descriptor */
36 /* the child isn't going to read from the pipe, so 36 /* the child isn't going to read from the pipe, so
37 * pipefd[0] can be closed */ 37 * pipefd[0] can be closed */
38 close (pipefd[0]); 38 close(pipefd[0]);
39 39
40 /* These are the commands to run, with success commented. dig and nslookup only problems */ 40 /* These are the commands to run, with success commented. dig and nslookup only problems */
41 /*execl ("/bin/date","date",0);*/ /* 100% */ 41 /*execl ("/bin/date","date",0);*/ /* 100% */
42 /*execl ("/bin/cat", "cat", "/etc/hosts", 0);*/ /* 100% */ 42 /*execl ("/bin/cat", "cat", "/etc/hosts", 0);*/ /* 100% */
43 /*execl ("/usr/bin/dig", "dig", "redhat.com", 0);*/ /* 69% */ 43 /*execl ("/usr/bin/dig", "dig", "redhat.com", 0);*/ /* 69% */
44 /*execl("/bin/sleep", "sleep", "1", 0);*/ /* 100% */ 44 /*execl("/bin/sleep", "sleep", "1", 0);*/ /* 100% */
45 execl ("/usr/bin/nslookup","nslookup","redhat.com",0); /* 90% (after 100 tests), 40% (after 10 tests) */ 45 execl("/usr/bin/nslookup", "nslookup", "redhat.com",
46 /*execl ("/bin/ping","ping","-c","1","localhost",0);*/ /* 100% */ 46 0); /* 90% (after 100 tests), 40% (after 10 tests) */
47 /*execl ("/bin/ping","ping","-c","1","192.168.10.32",0);*/ /* 100% */ 47 /*execl ("/bin/ping","ping","-c","1","localhost",0);*/ /* 100% */
48 _exit(0); 48 /*execl ("/bin/ping","ping","-c","1","192.168.10.32",0);*/ /* 100% */
49 _exit(0);
49 50
50 default: /* this is the code the parent runs */ 51 default: /* this is the code the parent runs */
51 52
52 close(0); /* close stdin */ 53 close(0); /* close stdin */
53 /* Set file descriptor 0 (stdin) to read from the pipe */ 54 /* Set file descriptor 0 (stdin) to read from the pipe */
54 dup (pipefd[0]); 55 dup(pipefd[0]);
55 /* the parent isn't going to write to the pipe */ 56 /* the parent isn't going to write to the pipe */
56 close (pipefd[1]); 57 close(pipefd[1]);
57 /* Now read from the pipe */ 58 /* Now read from the pipe */
58 fgets(str, 1023, stdin); 59 fgets(str, 1023, stdin);
59 /*printf("1st line output is %s\n", str);*/ 60 /*printf("1st line output is %s\n", str);*/
60 61
61 /*while (!childtermd);*/ /* Uncomment this line to fix */ 62 /*while (!childtermd);*/ /* Uncomment this line to fix */
62 63
63 died= wait(&status); 64 died = wait(&status);
64 /*printf("died=%d status=%d\n", died, status);*/ 65 /*printf("died=%d status=%d\n", died, status);*/
65 if (died > 0) _exit(0); 66 if (died > 0) {
66 else _exit(1); 67 _exit(0);
67 } 68 } else {
69 _exit(1);
70 }
71 }
68} 72}
69 73
70void 74void popen_sigchld_handler(int signo) {
71popen_sigchld_handler (int signo) 75 if (signo == SIGCHLD) {
72{ 76 /*printf("Caught sigchld\n");*/
73 if (signo == SIGCHLD) { 77 childtermd = 1;
74 /*printf("Caught sigchld\n");*/ 78 }
75 childtermd = 1;
76 }
77} 79}