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/*
Copyright (C) 2009 RedHat inc.
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "run-command.h"
#include "abrtlib.h"
/*
Inspired by git code.
http://git.kernel.org/?p=git/git.git;a=blob;f=run-command.c;hb=HEAD
*/
struct child_process
{
const char **argv;
pid_t pid;
};
static int start_command(struct child_process *cmd)
{
cmd->pid = fork();
if (cmd->pid == 0)
{ // new process
execvp(cmd->argv[0], (char *const*)cmd->argv);
exit(127);
}
if (cmd->pid < 0)
{
error_msg_and_die("Unable to fork for %s: %s", cmd->argv[0], strerror(errno));
return -1;
}
return 0;
}
static int finish_command(struct child_process *cmd)
{
pid_t waiting;
int status, code = -1;
while ((waiting = waitpid(cmd->pid, &status, 0)) < 0 && errno == EINTR)
; /* nothing */
if (waiting < 0)
error_msg_and_die("waitpid for %s failed: %s", cmd->argv[0], strerror(errno));
else if (waiting != cmd->pid)
error_msg_and_die("waitpid is confused (%s)", cmd->argv[0]);
else if (WIFSIGNALED(status))
{
code = WTERMSIG(status);
error_msg("%s died of signal %d", cmd->argv[0], code);
}
else if (WIFEXITED(status))
{
code = WEXITSTATUS(status);
if (code == 127)
{
code = -1;
error_msg_and_die("cannot run %s: %s", cmd->argv[0], strerror(ENOENT));
}
}
else
error_msg_and_die("waitpid is confused (%s)", cmd->argv[0]);
return code;
}
int run_command(const char **argv)
{
struct child_process cmd;
cmd.argv = argv;
int code = start_command(&cmd);
if (code)
return code;
return finish_command(&cmd);
}
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