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unrar_exec.c:127: warning: implicit declaration of function 'waitpid' git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25427 b3059339-0415-0410-9bf9-f77b7e298cf2
237 lines
7.1 KiB
C
237 lines
7.1 KiB
C
/*
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* List files and extract file from rars by using external executable unrar.
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*
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* Copyright (C) 2005 Jindrich Makovicka <makovick gmail com>
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* Copyright (C) 2007 Ulion <ulion2002 gmail com>
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MPlayer; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <sys/wait.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <locale.h>
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#include "unrar_exec.h"
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#include "mp_msg.h"
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#define UNRAR_LIST 1
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#define UNRAR_EXTRACT 2
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char* unrar_executable = NULL;
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static FILE* launch_pipe(pid_t *apid, const char *executable, int action,
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const char *archive, const char *filename)
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{
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if (!executable || access(executable, R_OK | X_OK)) return NULL;
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if (access(archive, R_OK)) return NULL;
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{
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int mypipe[2];
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pid_t pid;
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if (pipe(mypipe)) {
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mp_msg(MSGT_GLOBAL, MSGL_ERR, "UnRAR: Cannot create pipe.\n");
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return NULL;
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}
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pid = fork();
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if (pid == 0) {
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/* This is the child process. Execute the unrar executable. */
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close(mypipe[0]);
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// Close MPlayer's stdin, stdout and stderr so the unrar binary
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// can not mess them up.
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// TODO: Close all other files except the pipe.
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close(0); close(1); close(2);
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// Assign new stdin, stdout and stderr and check they actually got the
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// right descriptors.
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if (open("/dev/null", O_RDONLY) != 0 || dup(mypipe[1]) != 1
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|| open("/dev/null", O_WRONLY) != 2)
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_exit(EXIT_FAILURE);
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if (action == UNRAR_LIST)
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execl(executable, executable, "v", archive, NULL);
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else if (action == UNRAR_EXTRACT)
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execl(executable, executable, "p", "-inul", "-p-",
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archive,filename,NULL);
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mp_msg(MSGT_GLOBAL, MSGL_ERR, "UnRAR: Cannot execute %s\n", executable);
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_exit(EXIT_FAILURE);
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}
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if (pid < 0) {
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/* The fork failed. Report failure. */
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mp_msg(MSGT_GLOBAL, MSGL_ERR, "UnRAR: Fork failed\n");
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return NULL;
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}
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/* This is the parent process. Prepare the pipe stream. */
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close(mypipe[1]);
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*apid = pid;
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if (action == UNRAR_LIST)
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mp_msg(MSGT_GLOBAL, MSGL_V,
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"UnRAR: call unrar with command line: %s v %s\n",
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executable, archive);
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else if (action == UNRAR_EXTRACT)
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mp_msg(MSGT_GLOBAL, MSGL_V,
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"UnRAR: call unrar with command line: %s p -inul -p- %s %s\n",
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executable, archive, filename);
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return fdopen(mypipe[0], "r");
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}
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}
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#define ALLOC_INCR 1 * 1024 * 1024
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int unrar_exec_get(unsigned char **output, unsigned long *size,
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const char *filename, const char *rarfile)
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{
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int bufsize = ALLOC_INCR, bytesread;
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pid_t pid;
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int status = 0;
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FILE *rar_pipe;
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rar_pipe=launch_pipe(&pid,unrar_executable,UNRAR_EXTRACT,rarfile,filename);
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if (!rar_pipe) return 0;
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*size = 0;
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*output = malloc(bufsize);
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while (*output) {
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bytesread=fread(*output+*size, 1, bufsize-*size, rar_pipe);
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if (bytesread <= 0)
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break;
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*size += bytesread;
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if (*size == bufsize) {
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char *p;
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bufsize += ALLOC_INCR;
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p = realloc(*output, bufsize);
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if (!p)
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free(*output);
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*output = p;
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}
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}
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fclose(rar_pipe);
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pid = waitpid(pid, &status, 0);
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if (!*output || !*size || (pid == -1 && errno != ECHILD) ||
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(pid > 0 && status)) {
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free(*output);
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*output = NULL;
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*size = 0;
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return 0;
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}
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if (bufsize > *size) {
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char *p = realloc(*output, *size);
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if (p)
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*output = p;
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}
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mp_msg(MSGT_GLOBAL, MSGL_V, "UnRAR: got file %s len %lu\n", filename,*size);
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return 1;
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}
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#define PARSE_NAME 0
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#define PARSE_PROPS 1
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int unrar_exec_list(const char *rarfile, ArchiveList_struct **list)
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{
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char buf[1024], fname[1024];
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char *p;
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pid_t pid;
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int status = 0, file_num = -1, ignore_next_line = 0, state = PARSE_NAME;
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FILE *rar_pipe;
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ArchiveList_struct *alist = NULL, *current = NULL, *new;
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rar_pipe = launch_pipe(&pid, unrar_executable, UNRAR_LIST, rarfile, NULL);
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if (!rar_pipe) return -1;
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while (fgets(buf, sizeof(buf), rar_pipe)) {
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int packsize, unpsize, ratio, day, month, year, hour, min;
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int llen = strlen(buf);
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// If read nothing, we got a file_num -1.
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if (file_num == -1)
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file_num = 0;
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if (buf[llen-1] != '\n')
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// The line is too long, ignore it.
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ignore_next_line = 2;
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if (ignore_next_line) {
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--ignore_next_line;
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state = PARSE_NAME;
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continue;
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}
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// Trim the line.
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while (llen > 0 && strchr(" \t\n\r\v\f", buf[llen-1]))
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--llen;
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buf[llen] = '\0';
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p = buf;
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while (*p && strchr(" \t\n\r\v\f", *p))
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++p;
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if (!*p) {
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state = PARSE_NAME;
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continue;
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}
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if (state == PARSE_PROPS && sscanf(p, "%d %d %d%% %d-%d-%d %d:%d",
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&unpsize, &packsize, &ratio, &day,
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&month, &year, &hour, &min) == 8) {
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new = calloc(1, sizeof(ArchiveList_struct));
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if (!new) {
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file_num = -1;
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break;
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}
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if (!current)
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alist = new;
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else
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current->next = new;
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current = new;
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current->item.Name = strdup(fname);
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state = PARSE_NAME;
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if (!current->item.Name) {
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file_num = -1;
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break;
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}
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current->item.PackSize = packsize;
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current->item.UnpSize = unpsize;
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++file_num;
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continue;
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}
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strcpy(fname, p);
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state = PARSE_PROPS;
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}
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fclose(rar_pipe);
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pid = waitpid(pid, &status, 0);
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if (file_num < 0 || (pid == -1 && errno != ECHILD) ||
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(pid > 0 && status)) {
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unrar_exec_freelist(alist);
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return -1;
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}
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if (!alist)
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return -1;
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*list = alist;
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mp_msg(MSGT_GLOBAL, MSGL_V, "UnRAR: list got %d files\n", file_num);
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return file_num;
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}
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void unrar_exec_freelist(ArchiveList_struct *list)
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{
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ArchiveList_struct* tmp;
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while (list) {
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tmp = list->next;
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free(list->item.Name);
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free(list);
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list = tmp;
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}
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}
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