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/* notmuch - Not much of an email program, (just index and search)
*
* This file is part of notmuch.
*
* Copyright © 2011 Jani Nikula
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: Jani Nikula <jani@nikula.org>
*/
#include "notmuch-client.h"
#include <sys/wait.h>
int
notmuch_run_hook (const char *db_path, const char *hook)
{
char *hook_path;
int status = 0;
pid_t pid;
hook_path = talloc_asprintf (NULL, "%s/%s/%s/%s", db_path, ".notmuch",
"hooks", hook);
if (hook_path == NULL) {
fprintf (stderr, "Out of memory\n");
return 1;
}
/* Check access before fork() for speed and simplicity of error handling. */
if (access (hook_path, X_OK) == -1) {
/* Ignore ENOENT. It's okay not to have a hook, hook dir, or even
* notmuch dir. Dangling symbolic links also result in ENOENT, but
* we'll ignore that too for simplicity. */
if (errno != ENOENT) {
fprintf (stderr, "Error: %s hook access failed: %s\n", hook,
strerror (errno));
status = 1;
}
goto DONE;
}
/* Flush any buffered output before forking. */
fflush (stdout);
pid = fork();
if (pid == -1) {
fprintf (stderr, "Error: %s hook fork failed: %s\n", hook,
strerror (errno));
status = 1;
goto DONE;
} else if (pid == 0) {
execl (hook_path, hook_path, NULL);
/* Same as above for ENOENT, but unlikely now. Indicate all other errors
* to parent through non-zero exit status. */
if (errno != ENOENT) {
fprintf (stderr, "Error: %s hook execution failed: %s\n", hook,
strerror (errno));
status = 1;
}
exit (status);
}
if (waitpid (pid, &status, 0) == -1) {
fprintf (stderr, "Error: %s hook wait failed: %s\n", hook,
strerror (errno));
status = 1;
goto DONE;
}
if (!WIFEXITED (status) || WEXITSTATUS (status)) {
if (WIFEXITED (status)) {
fprintf (stderr, "Error: %s hook failed with status %d\n",
hook, WEXITSTATUS (status));
} else if (WIFSIGNALED (status)) {
fprintf (stderr, "Error: %s hook terminated with signal %d\n",
hook, WTERMSIG (status));
}
status = 1;
}
DONE:
talloc_free (hook_path);
return status;
}
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