/*
* Execute and wait for external command
*/
int exec_cmd(struct cmd_context *cmd, const char *const argv[], int *rstatus)
{
pid_t pid;
int status;
char buf[PATH_MAX * 2];
log_verbose("Executing: %s", _verbose_args(argv, buf, sizeof(buf)));
if ((pid = fork()) == -1) {
log_error("fork failed: %s", strerror(errno));
return 0;
}
if (!pid) {
/* Child */
reset_locking();
dev_close_all();
/* FIXME Fix effect of reset_locking on cache then include this */
/* destroy_toolcontext(cmd); */
/* FIXME Use execve directly */
execvp(argv[0], (char **const) argv);
log_sys_error("execvp", argv[0]);
_exit(errno);
}
if (rstatus)
*rstatus = -1;
/* Parent */
if (wait4(pid, &status, 0, NULL) != pid) {
log_error("wait4 child process %u failed: %s", pid,
strerror(errno));
return 0;
}
if (!WIFEXITED(status)) {
log_error("Child %u exited abnormally", pid);
return 0;
}
if (WEXITSTATUS(status)) {
if (rstatus) {
*rstatus = WEXITSTATUS(status);
log_verbose("%s failed: %u", argv[0], *rstatus);
} else
log_error("%s failed: %u", argv[0], WEXITSTATUS(status));
return 0;
}
if (rstatus)
*rstatus = 0;
return 1;
}
static struct volume_group *_get_vg(struct cmd_context *cmd, const char *vgname)
{
dev_close_all();
return vg_read_for_update(cmd, vgname, NULL, 0);
}