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@@ -1,5 +1,5 @@
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-// Base code taken from http://www-h.eng.cam.ac.uk/help/tpl/unix/fork.html
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-// Fix for redhat suggested by Ptere Pramberger, peter@pramberger.at
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+/* Base code taken from http://www-h.eng.cam.ac.uk/help/tpl/unix/fork.html
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+ * Fix for redhat suggested by Ptere Pramberger, peter@pramberger.at */
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#include <unistd.h>
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#include <sys/wait.h>
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#include <stdio.h>
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@@ -25,43 +25,43 @@ int main(){
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printf("can't fork\n");
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_exit(-1);
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- case 0 : // this is the code the child runs
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- close(1); // close stdout
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- // pipefd[1] is for writing to the pipe. We want the output
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- // that used to go to the standard output (file descriptor 1)
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- // to be written to the pipe. The following command does this,
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- // creating a new file descripter 1 (the lowest available)
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- // that writes where pipefd[1] goes.
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- dup (pipefd[1]); // points pipefd at file descriptor
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- // the child isn't going to read from the pipe, so
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- // pipefd[0] can be closed
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+ case 0 : /* this is the code the child runs */
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+ close(1); /* close stdout */
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+ /* pipefd[1] is for writing to the pipe. We want the output
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+ * that used to go to the standard output (file descriptor 1)
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+ * to be written to the pipe. The following command does this,
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+ * creating a new file descripter 1 (the lowest available)
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+ * that writes where pipefd[1] goes. */
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+ dup (pipefd[1]); /* points pipefd at file descriptor */
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+ /* the child isn't going to read from the pipe, so
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+ * pipefd[0] can be closed */
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close (pipefd[0]);
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- //These are the commands to run, with success commented. dig and nslookup only problems
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- //execl ("/bin/date","date",0); // 100%
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- //execl ("/bin/cat", "cat", "/etc/hosts", 0); // 100%
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- //execl ("/usr/bin/dig", "dig", "redhat.com", 0); // 69%
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- //execl("/bin/sleep", "sleep", "1", 0); // 100%
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- execl ("/usr/bin/nslookup","nslookup","redhat.com",0); // 90% (after 100 tests), 40% (after 10 tests)
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- //execl ("/bin/ping","ping","-c","1","localhost",0); // 100%
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- //execl ("/bin/ping","ping","-c","1","192.168.10.32",0); // 100%
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+ /* These are the commands to run, with success commented. dig and nslookup only problems */
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+ /*execl ("/bin/date","date",0);*/ /* 100% */
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+ /*execl ("/bin/cat", "cat", "/etc/hosts", 0);*/ /* 100% */
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+ /*execl ("/usr/bin/dig", "dig", "redhat.com", 0);*/ /* 69% */
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+ /*execl("/bin/sleep", "sleep", "1", 0);*/ /* 100% */
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+ execl ("/usr/bin/nslookup","nslookup","redhat.com",0); /* 90% (after 100 tests), 40% (after 10 tests) */
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+ /*execl ("/bin/ping","ping","-c","1","localhost",0);*/ /* 100% */
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+ /*execl ("/bin/ping","ping","-c","1","192.168.10.32",0);*/ /* 100% */
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_exit(0);
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- default: // this is the code the parent runs
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+ default: /* this is the code the parent runs */
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- close(0); // close stdin
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- // Set file descriptor 0 (stdin) to read from the pipe
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+ close(0); /* close stdin */
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+ /* Set file descriptor 0 (stdin) to read from the pipe */
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dup (pipefd[0]);
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- // the parent isn't going to write to the pipe
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+ /* the parent isn't going to write to the pipe */
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close (pipefd[1]);
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- // Now read from the pipe
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+ /* Now read from the pipe */
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fgets(str, 1023, stdin);
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- //printf("1st line output is %s\n", str);
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+ /*printf("1st line output is %s\n", str);*/
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- //while (!childtermd); // Uncomment this line to fix
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+ /*while (!childtermd);*/ /* Uncomment this line to fix */
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died= wait(&status);
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- //printf("died=%d status=%d\n", died, status);
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+ /*printf("died=%d status=%d\n", died, status);*/
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if (died > 0) _exit(0);
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else _exit(1);
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}
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@@ -71,7 +71,7 @@ void
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popen_sigchld_handler (int signo)
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{
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if (signo == SIGCHLD) {
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- //printf("Caught sigchld\n");
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+ /*printf("Caught sigchld\n");*/
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childtermd = 1;
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}
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}
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