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dload: move (un)masking of signals to separate functions 

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dave Reisner 2011-08-19 13:51:47 -04:00 committed by Dan McGee
parent 10cbfc956c
commit c65cea0dcb
1 changed files with 24 additions and 17 deletions
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41
lib/libalpm/dload.c
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@ -66,8 +66,6 @@ static char *get_fullpath(const char *path, const char *filename,
return filepath;
}
enum sighandlers { OLD = 0, NEW = 1 };
static int dload_interrupted;
static void inthandler(int UNUSED signum)
{
@ -222,6 +220,25 @@ static void curl_set_handle_opts(struct dload_payload *payload,
}
}
static struct sigaction mask_signal(int signal, void (*handler)(int))
{
struct sigaction newaction, origaction;
newaction.sa_handler = handler;
sigemptyset(&newaction.sa_mask);
newaction.sa_flags = 0;
sigaction(signal, NULL, &origaction);
sigaction(signal, &newaction, NULL);
return origaction;
}
static void unmask_signal(int signal, struct sigaction sa)
{
sigaction(signal, &sa, NULL);
}
static int curl_download_internal(struct dload_payload *payload,
const char *localpath, char **final_file)
{
@ -234,7 +251,7 @@ static int curl_download_internal(struct dload_payload *payload,
struct stat st;
long timecond, respcode = 0, remote_time = -1;
double remote_size, bytes_dl;
struct sigaction sig_pipe[2], sig_int[2];
struct sigaction orig_sig_pipe, orig_sig_int;
/* shortcut to our handle within the payload */
alpm_handle_t *handle = payload->handle;
handle->pm_errno = 0;
@ -291,18 +308,8 @@ static int curl_download_internal(struct dload_payload *payload,
/* ignore any SIGPIPE signals- these may occur if our FTP socket dies or
* something along those lines. Store the old signal handler first. */
sig_pipe[NEW].sa_handler = SIG_IGN;
sigemptyset(&sig_pipe[NEW].sa_mask);
sig_pipe[NEW].sa_flags = 0;
sigaction(SIGPIPE, NULL, &sig_pipe[OLD]);
sigaction(SIGPIPE, &sig_pipe[NEW], NULL);
dload_interrupted = 0;
sig_int[NEW].sa_handler = &inthandler;
sigemptyset(&sig_int[NEW].sa_mask);
sig_int[NEW].sa_flags = 0;
sigaction(SIGINT, NULL, &sig_int[OLD]);
sigaction(SIGINT, &sig_int[NEW], NULL);
orig_sig_pipe = mask_signal(SIGPIPE, SIG_IGN);
orig_sig_int = mask_signal(SIGINT, &inthandler);
/* Progress 0 - initialize */
prevprogress = 0;
@ -418,8 +425,8 @@ cleanup:
}
/* restore the old signal handlers */
sigaction(SIGINT, &sig_int[OLD], NULL);
sigaction(SIGPIPE, &sig_pipe[OLD], NULL);
unmask_signal(SIGINT, orig_sig_int);
unmask_signal(SIGPIPE, orig_sig_pipe);
/* if we were interrupted, trip the old handler */
if(dload_interrupted) {
raise(SIGINT);