Attachment 155450 Details for Bug 112975 – patch

[patch] patch

tcp_wrappers-7.6-sigchld.patch (text/plain), 1.31 KB, created by Tomas Janousek on 2007-05-25 13:03:10 UTC

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Creator: Tomas Janousek

Created: 2007-05-25 13:03:10 UTC

Size: 1.31 KB

patch

obsolete

>--- tcp_wrappers_7.6/shell_cmd.c.sigchld	1994-12-28 17:42:44.000000000 +0100
>+++ tcp_wrappers_7.6/shell_cmd.c	2007-05-25 14:28:33.000000000 +0200
>@@ -31,6 +31,10 @@
> 
> static void do_child();
> 
>+/* Dummy handler */
>+
>+static void sigchld(int sig) {}
>+
> /* shell_cmd - execute shell command */
> 
> void    shell_cmd(command)
>@@ -39,6 +43,22 @@
>     int     child_pid;
>     int     wait_pid;
> 
>+    struct sigaction new_action, old_action;
>+    sigset_t new_mask, old_mask;
>+
>+    new_action.sa_handler = &sigchld;
>+    new_action.sa_flags = 0;
>+    sigemptyset(&new_action.sa_mask);
>+    sigemptyset(&new_mask);
>+    sigaddset(&new_mask, SIGCHLD);
>+
>+    /*
>+     * Ignore the SIGCHLD signal a unblock it so that the program should not
>+     * see it.
>+     */
>+    sigaction(SIGCHLD, &new_action, &old_action);
>+    sigprocmask(SIG_UNBLOCK, &new_mask, &old_mask);
>+
>     /*
>      * Most of the work is done within the child process, to minimize the
>      * risk of damage to the parent.
>@@ -55,6 +75,12 @@
> 	while ((wait_pid = wait((int *) 0)) != -1 && wait_pid != child_pid)
> 	     /* void */ ;
>     }
>+
>+    /*
>+     * Revert the signal mask and the SIGCHLD handler.
>+     */
>+    sigprocmask(SIG_SETMASK, &old_mask, 0);
>+    sigaction(SIGCHLD, &old_action, 0);
> }
> 
> /* do_child - exec command with { stdin, stdout, stderr } to /dev/null */

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Attachments on bug 112975: 155450