mirror of
https://github.com/feather-wallet/feather.git
synced 2024-12-23 12:09:50 +00:00
946 lines
32 KiB
C
946 lines
32 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (c) 2004-18 Simon Peter
|
|
* Portions Copyright (c) 2007 Alexander Larsson
|
|
*
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#ident "AppImage by Simon Peter, http://appimage.org/"
|
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include "squashfuse.h"
|
|
#include <squashfs_fs.h>
|
|
#include <nonstd.h>
|
|
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <ftw.h>
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#include <errno.h>
|
|
#include <wait.h>
|
|
#include <fnmatch.h>
|
|
|
|
#include <appimage/appimage_shared.h>
|
|
#include <hashlib.h>
|
|
|
|
#ifndef ENABLE_DLOPEN
|
|
#define ENABLE_DLOPEN
|
|
#endif
|
|
#include "squashfuse_dlopen.h"
|
|
|
|
/* Exit status to use when launching an AppImage fails.
|
|
* For applications that assign meanings to exit status codes (e.g. rsync),
|
|
* we avoid "cluttering" pre-defined exit status codes by using 127 which
|
|
* is known to alias an application exit status and also known as launcher
|
|
* error, see SYSTEM(3POSIX).
|
|
*/
|
|
#define EXIT_EXECERROR 127 /* Execution error exit status. */
|
|
|
|
//#include "notify.c"
|
|
extern int notify(char *title, char *body, int timeout);
|
|
struct stat st;
|
|
|
|
static ssize_t fs_offset; // The offset at which a filesystem image is expected = end of this ELF
|
|
|
|
static void die(const char *msg) {
|
|
fprintf(stderr, "%s\n", msg);
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
/* Check whether directory is writable */
|
|
bool is_writable_directory(char* str) {
|
|
if(access(str, W_OK) == 0) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool startsWith(const char *pre, const char *str)
|
|
{
|
|
size_t lenpre = strlen(pre),
|
|
lenstr = strlen(str);
|
|
return lenstr < lenpre ? false : strncmp(pre, str, lenpre) == 0;
|
|
}
|
|
|
|
/* Fill in a stat structure. Does not set st_ino */
|
|
sqfs_err private_sqfs_stat(sqfs *fs, sqfs_inode *inode, struct stat *st) {
|
|
sqfs_err err = SQFS_OK;
|
|
uid_t id;
|
|
|
|
memset(st, 0, sizeof(*st));
|
|
st->st_mode = inode->base.mode;
|
|
st->st_nlink = inode->nlink;
|
|
st->st_mtime = st->st_ctime = st->st_atime = inode->base.mtime;
|
|
|
|
if (S_ISREG(st->st_mode)) {
|
|
/* FIXME: do symlinks, dirs, etc have a size? */
|
|
st->st_size = inode->xtra.reg.file_size;
|
|
st->st_blocks = st->st_size / 512;
|
|
} else if (S_ISBLK(st->st_mode) || S_ISCHR(st->st_mode)) {
|
|
st->st_rdev = sqfs_makedev(inode->xtra.dev.major,
|
|
inode->xtra.dev.minor);
|
|
} else if (S_ISLNK(st->st_mode)) {
|
|
st->st_size = inode->xtra.symlink_size;
|
|
}
|
|
|
|
st->st_blksize = fs->sb.block_size; /* seriously? */
|
|
|
|
err = sqfs_id_get(fs, inode->base.uid, &id);
|
|
if (err)
|
|
return err;
|
|
st->st_uid = id;
|
|
err = sqfs_id_get(fs, inode->base.guid, &id);
|
|
st->st_gid = id;
|
|
if (err)
|
|
return err;
|
|
|
|
return SQFS_OK;
|
|
}
|
|
|
|
/* ================= End ELF parsing */
|
|
|
|
extern int fusefs_main(int argc, char *argv[], void (*mounted) (void));
|
|
// extern void ext2_quit(void);
|
|
|
|
static pid_t fuse_pid;
|
|
static int keepalive_pipe[2];
|
|
|
|
static void *
|
|
write_pipe_thread (void *arg)
|
|
{
|
|
char c[32];
|
|
int res;
|
|
// sprintf(stderr, "Called write_pipe_thread");
|
|
memset (c, 'x', sizeof (c));
|
|
while (1) {
|
|
/* Write until we block, on broken pipe, exit */
|
|
res = write (keepalive_pipe[1], c, sizeof (c));
|
|
if (res == -1) {
|
|
kill (fuse_pid, SIGTERM);
|
|
break;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
fuse_mounted (void)
|
|
{
|
|
pthread_t thread;
|
|
fuse_pid = getpid();
|
|
pthread_create(&thread, NULL, write_pipe_thread, keepalive_pipe);
|
|
}
|
|
|
|
char* getArg(int argc, char *argv[],char chr)
|
|
{
|
|
int i;
|
|
for (i=1; i<argc; ++i)
|
|
if ((argv[i][0]=='-') && (argv[i][1]==chr))
|
|
return &(argv[i][2]);
|
|
return NULL;
|
|
}
|
|
|
|
/* mkdir -p implemented in C, needed for https://github.com/AppImage/AppImageKit/issues/333
|
|
* https://gist.github.com/JonathonReinhart/8c0d90191c38af2dcadb102c4e202950 */
|
|
int
|
|
mkdir_p(const char* const path)
|
|
{
|
|
/* Adapted from http://stackoverflow.com/a/2336245/119527 */
|
|
const size_t len = strlen(path);
|
|
char _path[PATH_MAX];
|
|
char *p;
|
|
|
|
errno = 0;
|
|
|
|
/* Copy string so its mutable */
|
|
if (len > sizeof(_path)-1) {
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
strcpy(_path, path);
|
|
|
|
/* Iterate the string */
|
|
for (p = _path + 1; *p; p++) {
|
|
if (*p == '/') {
|
|
/* Temporarily truncate */
|
|
*p = '\0';
|
|
|
|
if (mkdir(_path, 0755) != 0) {
|
|
if (errno != EEXIST)
|
|
return -1;
|
|
}
|
|
|
|
*p = '/';
|
|
}
|
|
}
|
|
|
|
if (mkdir(_path, 0755) != 0) {
|
|
if (errno != EEXIST)
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
print_help(const char *appimage_path)
|
|
{
|
|
// TODO: "--appimage-list List content from embedded filesystem image\n"
|
|
fprintf(stderr,
|
|
"AppImage options:\n\n"
|
|
" --appimage-extract [<pattern>] Extract content from embedded filesystem image\n"
|
|
" If pattern is passed, only extract matching files\n"
|
|
" --appimage-help Print this help\n"
|
|
" --appimage-mount Mount embedded filesystem image and print\n"
|
|
" mount point and wait for kill with Ctrl-C\n"
|
|
" --appimage-offset Print byte offset to start of embedded\n"
|
|
" filesystem image\n"
|
|
" --appimage-portable-home Create a portable home folder to use as $HOME\n"
|
|
" --appimage-portable-config Create a portable config folder to use as\n"
|
|
" $XDG_CONFIG_HOME\n"
|
|
" --appimage-signature Print digital signature embedded in AppImage\n"
|
|
" --appimage-updateinfo[rmation] Print update info embedded in AppImage\n"
|
|
"\n"
|
|
"Portable home:\n"
|
|
"\n"
|
|
" If you would like the application contained inside this AppImage to store its\n"
|
|
" data alongside this AppImage rather than in your home directory, then you can\n"
|
|
" place a directory named\n"
|
|
"\n"
|
|
" %s.home\n"
|
|
"\n"
|
|
" Or you can invoke this AppImage with the --appimage-portable-home option,\n"
|
|
" which will create this directory for you. As long as the directory exists\n"
|
|
" and is neither moved nor renamed, the application contained inside this\n"
|
|
" AppImage to store its data in this directory rather than in your home\n"
|
|
" directory\n"
|
|
, appimage_path);
|
|
}
|
|
|
|
void
|
|
portable_option(const char *arg, const char *appimage_path, const char *name)
|
|
{
|
|
char option[32];
|
|
sprintf(option, "appimage-portable-%s", name);
|
|
|
|
if (arg && strcmp(arg, option)==0) {
|
|
char portable_dir[PATH_MAX];
|
|
char fullpath[PATH_MAX];
|
|
|
|
ssize_t length = readlink(appimage_path, fullpath, sizeof(fullpath));
|
|
if (length < 0) {
|
|
fprintf(stderr, "Error getting realpath for %s\n", appimage_path);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
fullpath[length] = '\0';
|
|
|
|
sprintf(portable_dir, "%s.%s", fullpath, name);
|
|
if (!mkdir(portable_dir, S_IRWXU))
|
|
fprintf(stderr, "Portable %s directory created at %s\n", name, portable_dir);
|
|
else
|
|
fprintf(stderr, "Error creating portable %s directory at %s: %s\n", name, portable_dir, strerror(errno));
|
|
|
|
exit(0);
|
|
}
|
|
}
|
|
|
|
bool extract_appimage(const char* const appimage_path, const char* const _prefix, const char* const _pattern, const bool overwrite, const bool verbose) {
|
|
sqfs_err err = SQFS_OK;
|
|
sqfs_traverse trv;
|
|
sqfs fs;
|
|
char prefixed_path_to_extract[1024];
|
|
|
|
// local copy we can modify safely
|
|
// allocate 1 more byte than we would need so we can add a trailing slash if there is none yet
|
|
char* prefix = malloc(strlen(_prefix) + 2);
|
|
strcpy(prefix, _prefix);
|
|
|
|
// sanitize prefix
|
|
if (prefix[strlen(prefix) - 1] != '/')
|
|
strcat(prefix, "/");
|
|
|
|
if (access(prefix, F_OK) == -1) {
|
|
if (mkdir_p(prefix) == -1) {
|
|
perror("mkdir_p error");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ((err = sqfs_open_image(&fs, appimage_path, (size_t) fs_offset))) {
|
|
fprintf(stderr, "Failed to open squashfs image\n");
|
|
return false;
|
|
};
|
|
|
|
// track duplicate inodes for hardlinks
|
|
char** created_inode = calloc(fs.sb.inodes, sizeof(char*));
|
|
if (created_inode == NULL) {
|
|
fprintf(stderr, "Failed allocating memory to track hardlinks\n");
|
|
return false;
|
|
}
|
|
|
|
if ((err = sqfs_traverse_open(&trv, &fs, sqfs_inode_root(&fs)))) {
|
|
fprintf(stderr, "sqfs_traverse_open error\n");
|
|
free(created_inode);
|
|
return false;
|
|
}
|
|
|
|
bool rv = true;
|
|
|
|
while (sqfs_traverse_next(&trv, &err)) {
|
|
if (!trv.dir_end) {
|
|
if (_pattern == NULL || fnmatch(_pattern, trv.path, FNM_FILE_NAME | FNM_LEADING_DIR) == 0) {
|
|
// fprintf(stderr, "trv.path: %s\n", trv.path);
|
|
// fprintf(stderr, "sqfs_inode_id: %lu\n", trv.entry.inode);
|
|
sqfs_inode inode;
|
|
if (sqfs_inode_get(&fs, &inode, trv.entry.inode)) {
|
|
fprintf(stderr, "sqfs_inode_get error\n");
|
|
rv = false;
|
|
break;
|
|
}
|
|
// fprintf(stderr, "inode.base.inode_type: %i\n", inode.base.inode_type);
|
|
// fprintf(stderr, "inode.xtra.reg.file_size: %lu\n", inode.xtra.reg.file_size);
|
|
strcpy(prefixed_path_to_extract, "");
|
|
strcat(strcat(prefixed_path_to_extract, prefix), trv.path);
|
|
|
|
if (verbose)
|
|
fprintf(stdout, "%s\n", prefixed_path_to_extract);
|
|
|
|
if (inode.base.inode_type == SQUASHFS_DIR_TYPE || inode.base.inode_type == SQUASHFS_LDIR_TYPE) {
|
|
// fprintf(stderr, "inode.xtra.dir.parent_inode: %ui\n", inode.xtra.dir.parent_inode);
|
|
// fprintf(stderr, "mkdir_p: %s/\n", prefixed_path_to_extract);
|
|
if (access(prefixed_path_to_extract, F_OK) == -1) {
|
|
if (mkdir_p(prefixed_path_to_extract) == -1) {
|
|
perror("mkdir_p error");
|
|
rv = false;
|
|
break;
|
|
}
|
|
}
|
|
} else if (inode.base.inode_type == SQUASHFS_REG_TYPE || inode.base.inode_type == SQUASHFS_LREG_TYPE) {
|
|
// if we've already created this inode, then this is a hardlink
|
|
char* existing_path_for_inode = created_inode[inode.base.inode_number - 1];
|
|
if (existing_path_for_inode != NULL) {
|
|
unlink(prefixed_path_to_extract);
|
|
if (link(existing_path_for_inode, prefixed_path_to_extract) == -1) {
|
|
fprintf(stderr, "Couldn't create hardlink from \"%s\" to \"%s\": %s\n",
|
|
prefixed_path_to_extract, existing_path_for_inode, strerror(errno));
|
|
rv = false;
|
|
break;
|
|
} else {
|
|
continue;
|
|
}
|
|
} else {
|
|
struct stat st;
|
|
if (!overwrite && stat(prefixed_path_to_extract, &st) == 0 && st.st_size == inode.xtra.reg.file_size) {
|
|
fprintf(stderr, "File exists and file size matches, skipping\n");
|
|
continue;
|
|
}
|
|
|
|
// track the path we extract to for this inode, so that we can `link` if this inode is found again
|
|
created_inode[inode.base.inode_number - 1] = strdup(prefixed_path_to_extract);
|
|
// fprintf(stderr, "Extract to: %s\n", prefixed_path_to_extract);
|
|
if (private_sqfs_stat(&fs, &inode, &st) != 0)
|
|
die("private_sqfs_stat error");
|
|
|
|
// create parent dir
|
|
char* p = strrchr(prefixed_path_to_extract, '/');
|
|
if (p) {
|
|
// set an \0 to end the split the string
|
|
*p = '\0';
|
|
mkdir_p(prefixed_path_to_extract);
|
|
|
|
// restore dir seprator
|
|
*p = '/';
|
|
}
|
|
|
|
// Read the file in chunks
|
|
off_t bytes_already_read = 0;
|
|
sqfs_off_t bytes_at_a_time = 64 * 1024;
|
|
FILE* f;
|
|
f = fopen(prefixed_path_to_extract, "w+");
|
|
if (f == NULL) {
|
|
perror("fopen error");
|
|
rv = false;
|
|
break;
|
|
}
|
|
while (bytes_already_read < inode.xtra.reg.file_size) {
|
|
char buf[bytes_at_a_time];
|
|
if (sqfs_read_range(&fs, &inode, (sqfs_off_t) bytes_already_read, &bytes_at_a_time, buf)) {
|
|
perror("sqfs_read_range error");
|
|
rv = false;
|
|
break;
|
|
}
|
|
// fwrite(buf, 1, bytes_at_a_time, stdout);
|
|
fwrite(buf, 1, bytes_at_a_time, f);
|
|
bytes_already_read = bytes_already_read + bytes_at_a_time;
|
|
}
|
|
fclose(f);
|
|
chmod(prefixed_path_to_extract, st.st_mode);
|
|
if (!rv)
|
|
break;
|
|
}
|
|
} else if (inode.base.inode_type == SQUASHFS_SYMLINK_TYPE || inode.base.inode_type == SQUASHFS_LSYMLINK_TYPE) {
|
|
size_t size;
|
|
sqfs_readlink(&fs, &inode, NULL, &size);
|
|
char buf[size];
|
|
int ret = sqfs_readlink(&fs, &inode, buf, &size);
|
|
if (ret != 0) {
|
|
perror("symlink error");
|
|
rv = false;
|
|
break;
|
|
}
|
|
// fprintf(stderr, "Symlink: %s to %s \n", prefixed_path_to_extract, buf);
|
|
unlink(prefixed_path_to_extract);
|
|
ret = symlink(buf, prefixed_path_to_extract);
|
|
if (ret != 0)
|
|
fprintf(stderr, "WARNING: could not create symlink\n");
|
|
} else {
|
|
fprintf(stderr, "TODO: Implement inode.base.inode_type %i\n", inode.base.inode_type);
|
|
}
|
|
// fprintf(stderr, "\n");
|
|
|
|
if (!rv)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
for (int i = 0; i < fs.sb.inodes; i++) {
|
|
free(created_inode[i]);
|
|
}
|
|
free(created_inode);
|
|
|
|
if (err != SQFS_OK) {
|
|
fprintf(stderr, "sqfs_traverse_next error\n");
|
|
rv = false;
|
|
}
|
|
sqfs_traverse_close(&trv);
|
|
sqfs_fd_close(fs.fd);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int rm_recursive_callback(const char* path, const struct stat* stat, const int type, struct FTW* ftw) {
|
|
(void) stat;
|
|
(void) ftw;
|
|
|
|
switch (type) {
|
|
case FTW_NS:
|
|
case FTW_DNR:
|
|
fprintf(stderr, "%s: ftw error: %s\n",
|
|
path, strerror(errno));
|
|
return 1;
|
|
|
|
case FTW_D:
|
|
// ignore directories at first, will be handled by FTW_DP
|
|
break;
|
|
|
|
case FTW_F:
|
|
case FTW_SL:
|
|
case FTW_SLN:
|
|
if (remove(path) != 0) {
|
|
fprintf(stderr, "Failed to remove %s: %s\n", path, strerror(errno));
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
|
|
case FTW_DP:
|
|
if (rmdir(path) != 0) {
|
|
fprintf(stderr, "Failed to remove directory %s: %s\n", path, strerror(errno));
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "Unexpected fts_info\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
};
|
|
|
|
bool rm_recursive(const char* const path) {
|
|
// FTW_DEPTH: perform depth-first search to make sure files are deleted before the containing directories
|
|
// FTW_MOUNT: prevent deletion of files on other mounted filesystems
|
|
// FTW_PHYS: do not follow symlinks, but report symlinks as such; this way, the symlink targets, which might point
|
|
// to locations outside path will not be deleted accidentally (attackers might abuse this)
|
|
int rv = nftw(path, &rm_recursive_callback, 0, FTW_DEPTH | FTW_MOUNT | FTW_PHYS);
|
|
|
|
return rv == 0;
|
|
}
|
|
|
|
bool build_mount_point(char* mount_dir, const char* const argv0, char const* const temp_base, const size_t templen) {
|
|
const size_t maxnamelen = 6;
|
|
|
|
// when running for another AppImage, we should use that for building the mountpoint name instead
|
|
char* target_appimage = getenv("TARGET_APPIMAGE");
|
|
|
|
char* path_basename;
|
|
if (target_appimage != NULL) {
|
|
path_basename = basename(target_appimage);
|
|
} else {
|
|
path_basename = basename(argv0);
|
|
}
|
|
|
|
size_t namelen = strlen(path_basename);
|
|
// limit length of tempdir name
|
|
if (namelen > maxnamelen) {
|
|
namelen = maxnamelen;
|
|
}
|
|
|
|
strcpy(mount_dir, temp_base);
|
|
strncpy(mount_dir + templen, "/.mount_", 8);
|
|
strncpy(mount_dir + templen + 8, path_basename, namelen);
|
|
strncpy(mount_dir+templen+8+namelen, "XXXXXX", 6);
|
|
mount_dir[templen+8+namelen+6] = 0; // null terminate destination
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
char appimage_path[PATH_MAX];
|
|
char argv0_path[PATH_MAX];
|
|
char * arg;
|
|
|
|
/* We might want to operate on a target appimage rather than this file itself,
|
|
* e.g., for appimaged which must not run untrusted code from random AppImages.
|
|
* This variable is intended for use by e.g., appimaged and is subject to
|
|
* change any time. Do not rely on it being present. We might even limit this
|
|
* functionality specifically for builds used by appimaged.
|
|
*/
|
|
if (getenv("TARGET_APPIMAGE") == NULL) {
|
|
strcpy(appimage_path, "/proc/self/exe");
|
|
strcpy(argv0_path, argv[0]);
|
|
} else {
|
|
strcpy(appimage_path, getenv("TARGET_APPIMAGE"));
|
|
strcpy(argv0_path, getenv("TARGET_APPIMAGE"));
|
|
|
|
#ifdef ENABLE_SETPROCTITLE
|
|
// load libbsd dynamically to change proc title
|
|
// this is an optional feature, therefore we don't hard require it
|
|
void* libbsd = dlopen("libbsd.so", RTLD_NOW);
|
|
|
|
if (libbsd != NULL) {
|
|
// clear error state
|
|
dlerror();
|
|
|
|
// try to load the two required symbols
|
|
void (*setproctitle_init)(int, char**, char**) = dlsym(libbsd, "setproctitle_init");
|
|
|
|
char* error;
|
|
|
|
if ((error = dlerror()) == NULL) {
|
|
void (*setproctitle)(const char*, char*) = dlsym(libbsd, "setproctitle");
|
|
|
|
if (dlerror() == NULL) {
|
|
char buffer[1024];
|
|
strcpy(buffer, getenv("TARGET_APPIMAGE"));
|
|
for (int i = 1; i < argc; i++) {
|
|
strcat(buffer, " ");
|
|
strcat(buffer, argv[i]);
|
|
}
|
|
|
|
(*setproctitle_init)(argc, argv, environ);
|
|
(*setproctitle)("%s", buffer);
|
|
}
|
|
}
|
|
|
|
dlclose(libbsd);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// temporary directories are required in a few places
|
|
// therefore we implement the detection of the temp base dir at the top of the code to avoid redundancy
|
|
char temp_base[PATH_MAX] = P_tmpdir;
|
|
|
|
{
|
|
const char* const TMPDIR = getenv("TMPDIR");
|
|
if (TMPDIR != NULL)
|
|
strcpy(temp_base, getenv("TMPDIR"));
|
|
}
|
|
|
|
fs_offset = appimage_get_elf_size(appimage_path);
|
|
|
|
// error check
|
|
if (fs_offset < 0) {
|
|
fprintf(stderr, "Failed to get fs offset for %s\n", appimage_path);
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
arg=getArg(argc,argv,'-');
|
|
|
|
/* Print the help and then exit */
|
|
if(arg && strcmp(arg,"appimage-help")==0) {
|
|
char fullpath[PATH_MAX];
|
|
|
|
ssize_t length = readlink(appimage_path, fullpath, sizeof(fullpath));
|
|
if (length < 0) {
|
|
fprintf(stderr, "Error getting realpath for %s\n", appimage_path);
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
fullpath[length] = '\0';
|
|
|
|
print_help(fullpath);
|
|
exit(0);
|
|
}
|
|
|
|
/* Just print the offset and then exit */
|
|
if(arg && strcmp(arg,"appimage-offset")==0) {
|
|
printf("%lu\n", fs_offset);
|
|
exit(0);
|
|
}
|
|
|
|
arg=getArg(argc,argv,'-');
|
|
|
|
/* extract the AppImage */
|
|
if(arg && strcmp(arg,"appimage-extract")==0) {
|
|
char* pattern;
|
|
|
|
// default use case: use standard prefix
|
|
if (argc == 2) {
|
|
pattern = NULL;
|
|
} else if (argc == 3) {
|
|
pattern = argv[2];
|
|
} else {
|
|
fprintf(stderr, "Unexpected argument count: %d\n", argc - 1);
|
|
fprintf(stderr, "Usage: %s --appimage-extract [<prefix>]\n", argv0_path);
|
|
exit(1);
|
|
}
|
|
|
|
if (!extract_appimage(appimage_path, "squashfs-root/", pattern, true, true)) {
|
|
exit(1);
|
|
}
|
|
|
|
exit(0);
|
|
}
|
|
|
|
// calculate full path of AppImage
|
|
int length;
|
|
char fullpath[PATH_MAX];
|
|
|
|
if(getenv("TARGET_APPIMAGE") == NULL) {
|
|
// If we are operating on this file itself
|
|
ssize_t len = readlink(appimage_path, fullpath, sizeof(fullpath));
|
|
if (len < 0) {
|
|
perror("Failed to obtain absolute path");
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
fullpath[len] = '\0';
|
|
} else {
|
|
char* abspath = realpath(appimage_path, NULL);
|
|
if (abspath == NULL) {
|
|
perror("Failed to obtain absolute path");
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
strcpy(fullpath, abspath);
|
|
free(abspath);
|
|
}
|
|
|
|
if (getenv("APPIMAGE_EXTRACT_AND_RUN") != NULL || (arg && strcmp(arg, "appimage-extract-and-run") == 0)) {
|
|
char* hexlified_digest = NULL;
|
|
|
|
// calculate MD5 hash of file, and use it to make extracted directory name "content-aware"
|
|
// see https://github.com/AppImage/AppImageKit/issues/841 for more information
|
|
{
|
|
FILE* f = fopen(appimage_path, "rb");
|
|
if (f == NULL) {
|
|
perror("Failed to open AppImage file");
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
Md5Context ctx;
|
|
Md5Initialise(&ctx);
|
|
|
|
char buf[4096];
|
|
for (size_t bytes_read; (bytes_read = fread(buf, sizeof(char), sizeof(buf), f)); bytes_read > 0) {
|
|
Md5Update(&ctx, buf, (uint32_t) bytes_read);
|
|
}
|
|
|
|
MD5_HASH digest;
|
|
Md5Finalise(&ctx, &digest);
|
|
|
|
hexlified_digest = appimage_hexlify(digest.bytes, sizeof(digest.bytes));
|
|
}
|
|
|
|
char* prefix = malloc(strlen(temp_base) + 20 + strlen(hexlified_digest) + 2);
|
|
strcpy(prefix, temp_base);
|
|
strcat(prefix, "/appimage_extracted_");
|
|
strcat(prefix, hexlified_digest);
|
|
free(hexlified_digest);
|
|
|
|
const bool verbose = (getenv("VERBOSE") != NULL);
|
|
|
|
if (!extract_appimage(appimage_path, prefix, NULL, false, verbose)) {
|
|
fprintf(stderr, "Failed to extract AppImage\n");
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
int pid;
|
|
if ((pid = fork()) == -1) {
|
|
int error = errno;
|
|
fprintf(stderr, "fork() failed: %s\n", strerror(error));
|
|
exit(EXIT_EXECERROR);
|
|
} else if (pid == 0) {
|
|
const char apprun_fname[] = "AppRun";
|
|
char* apprun_path = malloc(strlen(prefix) + 1 + strlen(apprun_fname) + 1);
|
|
strcpy(apprun_path, prefix);
|
|
strcat(apprun_path, "/");
|
|
strcat(apprun_path, apprun_fname);
|
|
|
|
// create copy of argument list without the --appimage-extract-and-run parameter
|
|
char* new_argv[argc];
|
|
int new_argc = 0;
|
|
new_argv[new_argc++] = strdup(apprun_path);
|
|
for (int i = 1; i < argc; ++i) {
|
|
if (strcmp(argv[i], "--appimage-extract-and-run") != 0) {
|
|
new_argv[new_argc++] = strdup(argv[i]);
|
|
}
|
|
}
|
|
new_argv[new_argc] = NULL;
|
|
|
|
/* Setting some environment variables that the app "inside" might use */
|
|
setenv("APPIMAGE", fullpath, 1);
|
|
setenv("ARGV0", argv0_path, 1);
|
|
setenv("APPDIR", prefix, 1);
|
|
|
|
execv(apprun_path, new_argv);
|
|
|
|
int error = errno;
|
|
fprintf(stderr, "Failed to run %s: %s\n", apprun_path, strerror(error));
|
|
|
|
free(apprun_path);
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
int status = 0;
|
|
int rv = waitpid(pid, &status, 0);
|
|
status = rv > 0 && WIFEXITED (status) ? WEXITSTATUS (status) : EXIT_EXECERROR;
|
|
|
|
if (getenv("NO_CLEANUP") == NULL) {
|
|
if (!rm_recursive(prefix)) {
|
|
fprintf(stderr, "Failed to clean up cache directory\n");
|
|
if (status == 0) /* avoid messing existing failure exit status */
|
|
status = EXIT_EXECERROR;
|
|
}
|
|
}
|
|
|
|
// template == prefix, must be freed only once
|
|
free(prefix);
|
|
|
|
exit(status);
|
|
}
|
|
|
|
if(arg && (strcmp(arg,"appimage-updateinformation")==0 || strcmp(arg,"appimage-updateinfo")==0)) {
|
|
unsigned long offset = 0;
|
|
unsigned long length = 0;
|
|
appimage_get_elf_section_offset_and_length(appimage_path, ".upd_info", &offset, &length);
|
|
// fprintf(stderr, "offset: %lu\n", offset);
|
|
// fprintf(stderr, "length: %lu\n", length);
|
|
// print_hex(appimage_path, offset, length);
|
|
appimage_print_binary(appimage_path, offset, length);
|
|
exit(0);
|
|
}
|
|
|
|
if(arg && strcmp(arg,"appimage-signature")==0) {
|
|
unsigned long offset = 0;
|
|
unsigned long length = 0;
|
|
appimage_get_elf_section_offset_and_length(appimage_path, ".sha256_sig", &offset, &length);
|
|
// fprintf(stderr, "offset: %lu\n", offset);
|
|
// fprintf(stderr, "length: %lu\n", length);
|
|
// print_hex(appimage_path, offset, length);
|
|
appimage_print_binary(appimage_path, offset, length);
|
|
exit(0);
|
|
}
|
|
|
|
portable_option(arg, appimage_path, "home");
|
|
portable_option(arg, appimage_path, "config");
|
|
|
|
// If there is an argument starting with appimage- (but not appimage-mount which is handled further down)
|
|
// then stop here and print an error message
|
|
if((arg && strncmp(arg, "appimage-", 8) == 0) && (arg && strcmp(arg,"appimage-mount")!=0)) {
|
|
fprintf(stderr,"--%s is not yet implemented\n", arg);
|
|
exit(1);
|
|
}
|
|
|
|
LOAD_LIBRARY; /* exit if libfuse is missing */
|
|
|
|
int dir_fd, res;
|
|
|
|
size_t templen = strlen(temp_base);
|
|
|
|
// allocate enough memory (size of name won't exceed 60 bytes)
|
|
char mount_dir[templen + 60];
|
|
|
|
build_mount_point(mount_dir, argv[0], temp_base, templen);
|
|
|
|
size_t mount_dir_size = strlen(mount_dir);
|
|
pid_t pid;
|
|
char **real_argv;
|
|
int i;
|
|
|
|
if (mkdtemp(mount_dir) == NULL) {
|
|
perror ("create mount dir error");
|
|
exit (EXIT_EXECERROR);
|
|
}
|
|
|
|
if (pipe (keepalive_pipe) == -1) {
|
|
perror ("pipe error");
|
|
exit (EXIT_EXECERROR);
|
|
}
|
|
|
|
pid = fork ();
|
|
if (pid == -1) {
|
|
perror ("fork error");
|
|
exit (EXIT_EXECERROR);
|
|
}
|
|
|
|
if (pid == 0) {
|
|
/* in child */
|
|
|
|
char *child_argv[5];
|
|
|
|
/* close read pipe */
|
|
close (keepalive_pipe[0]);
|
|
|
|
char *dir = realpath(appimage_path, NULL );
|
|
|
|
char options[100];
|
|
sprintf(options, "ro,offset=%lu", fs_offset);
|
|
|
|
child_argv[0] = dir;
|
|
child_argv[1] = "-o";
|
|
child_argv[2] = options;
|
|
child_argv[3] = dir;
|
|
child_argv[4] = mount_dir;
|
|
|
|
if(0 != fusefs_main (5, child_argv, fuse_mounted)){
|
|
char *title;
|
|
char *body;
|
|
title = "Cannot mount AppImage, please check your FUSE setup.";
|
|
body = "You might still be able to extract the contents of this AppImage \n"
|
|
"if you run it with the --appimage-extract option. \n"
|
|
"See https://github.com/AppImage/AppImageKit/wiki/FUSE \n"
|
|
"for more information";
|
|
notify(title, body, 0); // 3 seconds timeout
|
|
};
|
|
} else {
|
|
/* in parent, child is $pid */
|
|
int c;
|
|
|
|
/* close write pipe */
|
|
close (keepalive_pipe[1]);
|
|
|
|
/* Pause until mounted */
|
|
read (keepalive_pipe[0], &c, 1);
|
|
|
|
/* Fuse process has now daemonized, reap our child */
|
|
waitpid(pid, NULL, 0);
|
|
|
|
dir_fd = open (mount_dir, O_RDONLY);
|
|
if (dir_fd == -1) {
|
|
perror ("open dir error");
|
|
exit (EXIT_EXECERROR);
|
|
}
|
|
|
|
res = dup2 (dir_fd, 1023);
|
|
if (res == -1) {
|
|
perror ("dup2 error");
|
|
exit (EXIT_EXECERROR);
|
|
}
|
|
close (dir_fd);
|
|
|
|
real_argv = malloc (sizeof (char *) * (argc + 1));
|
|
for (i = 0; i < argc; i++) {
|
|
real_argv[i] = argv[i];
|
|
}
|
|
real_argv[i] = NULL;
|
|
|
|
if(arg && strcmp(arg, "appimage-mount") == 0) {
|
|
char real_mount_dir[PATH_MAX];
|
|
|
|
if (realpath(mount_dir, real_mount_dir) == real_mount_dir) {
|
|
printf("%s\n", real_mount_dir);
|
|
} else {
|
|
printf("%s\n", mount_dir);
|
|
}
|
|
|
|
// stdout is, by default, buffered (unlike stderr), therefore in order to allow other processes to read
|
|
// the path from stdout, we need to flush the buffers now
|
|
// this is a less-invasive alternative to setbuf(stdout, NULL);
|
|
fflush(stdout);
|
|
|
|
for (;;) pause();
|
|
|
|
exit(0);
|
|
}
|
|
|
|
/* Setting some environment variables that the app "inside" might use */
|
|
setenv( "APPIMAGE", fullpath, 1 );
|
|
setenv( "ARGV0", argv0_path, 1 );
|
|
setenv( "APPDIR", mount_dir, 1 );
|
|
|
|
char portable_home_dir[PATH_MAX];
|
|
char portable_config_dir[PATH_MAX];
|
|
|
|
/* If there is a directory with the same name as the AppImage plus ".home", then export $HOME */
|
|
strcpy (portable_home_dir, fullpath);
|
|
strcat (portable_home_dir, ".home");
|
|
if(is_writable_directory(portable_home_dir)){
|
|
fprintf(stderr, "Setting $HOME to %s\n", portable_home_dir);
|
|
setenv("HOME",portable_home_dir,1);
|
|
}
|
|
|
|
/* If there is a directory with the same name as the AppImage plus ".config", then export $XDG_CONFIG_HOME */
|
|
strcpy (portable_config_dir, fullpath);
|
|
strcat (portable_config_dir, ".config");
|
|
if(is_writable_directory(portable_config_dir)){
|
|
fprintf(stderr, "Setting $XDG_CONFIG_HOME to %s\n", portable_config_dir);
|
|
setenv("XDG_CONFIG_HOME",portable_config_dir,1);
|
|
}
|
|
|
|
/* Original working directory */
|
|
char cwd[1024];
|
|
if (getcwd(cwd, sizeof(cwd)) != NULL) {
|
|
setenv( "OWD", cwd, 1 );
|
|
}
|
|
|
|
char filename[mount_dir_size + 8]; /* enough for mount_dir + "/AppRun" */
|
|
strcpy (filename, mount_dir);
|
|
strcat (filename, "/AppRun");
|
|
|
|
/* TODO: Find a way to get the exit status and/or output of this */
|
|
execv (filename, real_argv);
|
|
/* Error if we continue here */
|
|
perror("execv error");
|
|
exit(EXIT_EXECERROR);
|
|
}
|
|
|
|
return 0;
|
|
}
|