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Save and restore errno from within signal handlers.

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This is recommended by the POSIX standard, as well as by the sigaction(2) manpage
for various platforms that we support (e.g. Mac OS X).


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@324955 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2011-06-27 16:30:50 +00:00
parent 1eb5fcc5a5
commit 72d041e1b9
1 changed files with 4 additions and 2 deletions
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6
main/asterisk.c
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@@ -1479,7 +1479,7 @@ static struct sigaction urg_handler = {
static void _hup_handler(int num)
{
int a = 0;
int a = 0, save_errno = errno;
if (option_verbose > 1)
printf("Received HUP signal -- Reloading configs\n");
if (restartnow)
@@ -1490,6 +1490,7 @@ static void _hup_handler(int num)
fprintf(stderr, "hup_handler: write() failed: %s\n", strerror(errno));
}
}
errno = save_errno;
}
static struct sigaction hup_handler = {
@@ -1500,7 +1501,7 @@ static struct sigaction hup_handler = {
static void _child_handler(int sig)
{
/* Must not ever ast_log or ast_verbose within signal handler */
int n, status;
int n, status, save_errno = errno;
/*
* Reap all dead children -- not just one
@@ -1509,6 +1510,7 @@ static void _child_handler(int sig)
;
if (n == 0 && option_debug)
printf("Huh? Child handler, but nobody there?\n");
errno = save_errno;
}
static struct sigaction child_handler = {