FILE *pipe_open(struct cmd_context *cmd, const char *const argv[],
int sync_needed, struct pipe_data *pdata)
{
int pipefd[2];
char buf[PATH_MAX * 2];
if (sync_needed)
if (!sync_local_dev_names(cmd)) /* Flush ops and reset dm cookie */
return_0;
if (pipe(pipefd)) {
log_sys_error("pipe", "");
return 0;
}
log_verbose("Piping:%s", _verbose_args(argv, buf, sizeof(buf)));
if ((pdata->pid = fork()) == -1) {
log_sys_error("pipe", "");
return 0;
}
if (pdata->pid == 0) {
/* Child -> writer, convert pipe[0] to STDOUT */
if (!_reopen_fd_to_null(STDIN_FILENO))
stack;
else if (close(pipefd[0 /*read*/]))
log_sys_error("close", "pipe[0]");
else if (close(STDOUT_FILENO))
log_sys_error("close", "STDOUT");
else if (dup2(pipefd[1 /*write*/], STDOUT_FILENO) == -1)
log_sys_error("dup2", "STDOUT");
else if (close(pipefd[1]))
log_sys_error("close", "pipe[1]");
else if (argv[0]) {
execvp(argv[0], (char **) argv);
log_sys_error("execvp", argv[0]);
}
_exit(errno);
}
/* Parent -> reader */
if (close(pipefd[1 /*write*/])) {
log_sys_error("close", "STDOUT");
return NULL;
}
if (!(pdata->fp = fdopen(pipefd[0 /*read*/], "r"))) {
log_sys_error("fdopen", "STDIN");
if (close(pipefd[0]))
log_sys_error("close", "STDIN");
return NULL; /* FIXME: kill */
}
return pdata->fp;
}
/*
* 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;
}
