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// SPDX-FileCopyrightText: 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
/* bareboxenv.c - generate or read a barebox environment archive */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <limits.h>
#include <errno.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <libgen.h>
#include "compiler.h"
#define debug(...)
#define pr_debug_once(...)
/* Find out if the last character of a string matches the one given.
* Don't underrun the buffer if the string length is 0.
*/
static char *last_char_is(const char *s, int c)
{
if (s && *s) {
size_t sz = strlen(s) - 1;
s += sz;
if ( (unsigned char)*s == c)
return (char*)s;
}
return NULL;
}
enum {
ACTION_RECURSE = (1 << 0),
ACTION_FOLLOWLINKS = (1 << 1),
ACTION_DEPTHFIRST = (1 << 2),
/*ACTION_REVERSE = (1 << 3), - unused */
ACTION_SORT = (1 << 4),
};
int recursive_action(const char *fileName, unsigned flags,
int (*fileAction) (const char *fileName, struct stat* statbuf, void* userData, int depth),
int (*dirAction) (const char *fileName, struct stat* statbuf, void* userData, int depth),
void* userData, const unsigned depth);
#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
/* concatenate path and file name to new allocation buffer,
* not adding '/' if path name already has '/'
*/
static char *concat_path_file(const char *path, const char *filename)
{
char *lc, *str;
if (!path)
path = "";
lc = last_char_is(path, '/');
while (*filename == '/')
filename++;
str = xmalloc(strlen(path) + (lc==0 ? 1 : 0) + strlen(filename) + 1);
sprintf(str, "%s%s%s", path, (lc==NULL ? "/" : ""), filename);
return str;
}
/*
* This function make special for recursive actions with usage
* concat_path_file(path, filename)
* and skipping "." and ".." directory entries
*/
static char *concat_subpath_file(const char *path, const char *f)
{
if (f && DOT_OR_DOTDOT(f))
return NULL;
return concat_path_file(path, f);
}
#include <linux/list.h>
#include <linux/list_sort.h>
#include "../lib/list_sort.c"
#include "../lib/recursive_action.c"
#include "../include/envfs.h"
#include "../crypto/crc32.c"
#include "../lib/make_directory.c"
#include "../common/envfs-core.c"
#include "../common/environment.c"
static void usage(char *prgname)
{
printf( "Usage : %s [OPTION] DIRECTORY FILE\n"
"Load a barebox environment sector into a directory or\n"
"save a directory into a barebox environment sector\n"
#ifndef __BAREBOX__
"\n"
"Attention:\n"
"Depending on your environment backend storage you need to\n"
"erase FILE before you save the new environment.\n"
#endif
"\n"
"options:\n"
" -s save (directory -> environment sector)\n"
" -z force the built-in default environment at startup\n"
" -l load (environment sector -> directory)\n"
" -p <size> pad output file to given size\n"
" -v verbose\n",
prgname);
}
int main(int argc, char *argv[])
{
int opt;
int save = 0, load = 0, pad = 0, err = 0, fd;
char *filename = NULL, *dirname = NULL;
unsigned envfs_flags = 0;
int verbose = 0;
while((opt = getopt(argc, argv, "slp:vz")) != -1) {
switch (opt) {
case 's':
save = 1;
break;
case 'l':
load = 1;
break;
case 'p':
pad = strtoul(optarg, NULL, 0);
break;
case 'z':
envfs_flags |= ENVFS_FLAGS_FORCE_BUILT_IN;
save = 1;
break;
case 'v':
verbose = 1;
break;
}
}
if (optind + 1 >= argc) {
usage(argv[0]);
exit(1);
}
dirname = argv[optind];
filename = argv[optind + 1];
if ((!load && !save) || (load && save) || !filename || !dirname) {
usage(argv[0]);
exit(1);
}
if (save) {
fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0644);
if (fd < 0) {
perror("open");
exit(1);
}
close(fd);
}
if (save && pad) {
if (truncate(filename, pad)) {
perror("truncate");
exit(1);
}
}
if (load) {
if (verbose)
printf("loading env from file %s to %s\n", filename, dirname);
err = envfs_load(filename, dirname, 0);
if (verbose && err)
printf("loading env failed: %d\n", err);
}
if (save) {
if (verbose)
printf("saving contents of %s to file %s\n", dirname, filename);
err = envfs_save(filename, dirname, envfs_flags);
if (verbose && err)
printf("saving env failed: %d\n", err);
}
exit(err ? 1 : 0);
}
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