mirror of https://github.com/mpv-player/mpv
146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <pthread.h>
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#include "config.h"
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#include "common/common.h"
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#include "common/msg.h"
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#include "common/msg_control.h"
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#include "subprocess.h"
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void mp_devnull(void *ctx, char *data, size_t size)
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{
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}
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#if HAVE_POSIX
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int mp_subprocess(char **args, struct mp_cancel *cancel, void *ctx,
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subprocess_read_cb on_stdout, subprocess_read_cb on_stderr,
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char **error)
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{
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struct mp_subprocess_opts opts = {
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.exe = args[0],
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.args = args,
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.cancel = cancel,
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};
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opts.fds[opts.num_fds++] = (struct mp_subprocess_fd){
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.fd = 0, // stdin
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.src_fd = 0,
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};
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opts.fds[opts.num_fds++] = (struct mp_subprocess_fd){
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.fd = 1, // stdout
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.on_read = on_stdout,
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.on_read_ctx = ctx,
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.src_fd = on_stdout ? -1 : 1,
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};
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opts.fds[opts.num_fds++] = (struct mp_subprocess_fd){
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.fd = 2, // stderr
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.on_read = on_stderr,
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.on_read_ctx = ctx,
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.src_fd = on_stderr ? -1 : 2,
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};
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struct mp_subprocess_result res;
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mp_subprocess2(&opts, &res);
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if (res.error < 0) {
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*error = (char *)mp_subprocess_err_str(res.error);
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return res.error;
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}
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return res.exit_status;
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}
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void mp_subprocess_detached(struct mp_log *log, char **args)
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{
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mp_msg_flush_status_line(log);
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struct mp_subprocess_opts opts = {
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.exe = args[0],
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.args = args,
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.fds = {
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{.fd = 0, .src_fd = 0,},
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{.fd = 1, .src_fd = 1,},
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{.fd = 2, .src_fd = 2,},
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},
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.num_fds = 3,
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.detach = true,
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};
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struct mp_subprocess_result res;
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mp_subprocess2(&opts, &res);
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if (res.error < 0) {
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mp_err(log, "Starting subprocess failed: %s\n",
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mp_subprocess_err_str(res.error));
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}
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}
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#else
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struct subprocess_args {
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struct mp_log *log;
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char **args;
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};
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static void *run_subprocess(void *ptr)
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{
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struct subprocess_args *p = ptr;
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pthread_detach(pthread_self());
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mp_msg_flush_status_line(p->log);
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char *err = NULL;
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if (mp_subprocess(p->args, NULL, NULL, NULL, NULL, &err) < 0)
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mp_err(p->log, "Running subprocess failed: %s\n", err);
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talloc_free(p);
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return NULL;
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}
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void mp_subprocess_detached(struct mp_log *log, char **args)
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{
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struct subprocess_args *p = talloc_zero(NULL, struct subprocess_args);
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p->log = mp_log_new(p, log, NULL);
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int num_args = 0;
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for (int n = 0; args[n]; n++)
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MP_TARRAY_APPEND(p, p->args, num_args, talloc_strdup(p, args[n]));
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MP_TARRAY_APPEND(p, p->args, num_args, NULL);
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pthread_t thread;
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if (pthread_create(&thread, NULL, run_subprocess, p))
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talloc_free(p);
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}
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void mp_subprocess2(struct mp_subprocess_opts *opts,
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struct mp_subprocess_result *res)
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{
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*res = (struct mp_subprocess_result){.error = MP_SUBPROCESS_EUNSUPPORTED};
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}
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#endif
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const char *mp_subprocess_err_str(int num)
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{
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// Note: these are visible to the public client API
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switch (num) {
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case MP_SUBPROCESS_OK: return "success";
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case MP_SUBPROCESS_EKILLED_BY_US: return "killed";
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case MP_SUBPROCESS_EINIT: return "init";
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case MP_SUBPROCESS_EUNSUPPORTED: return "unsupported";
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case MP_SUBPROCESS_EGENERIC: // fall through
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default: return "unknown";
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}
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}
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