switch-coreboot/util/lar/lib.c
Stefan Reinauer 6220b632e7 Now version 3: LinuxBIOS -> coreboot rename.
- I left LB_TAG_ intact because they are used by the payloads
- file renames are still missing. see next commit
- some lb_ renames might be missing. feel free to provide patches.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://coreboot.org/repository/coreboot-v3@564 f3766cd6-281f-0410-b1cd-43a5c92072e9
2008-01-27 18:54:57 +00:00

330 lines
7.1 KiB
C

/*
* lar - lightweight archiver
*
* Copyright (C) 2006-2007 coresystems GmbH
* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "lar.h"
#include "lib.h"
#define MAX_PATH 1024
static struct file *files = NULL;
/**
* The default "compress impossible" hook to call when no other compression
* is used
*/
void compress_impossible(char *in, u32 in_len, char *out, u32 *out_len)
{
fprintf(stderr,
"The selected compression algorithm wasn't compiled in.\n");
exit(1);
}
/**
* The default "compress" hook to call when no other compression is used
*/
void do_no_compress(char *in, u32 in_len, char *out, u32 *out_len)
{
memcpy(out, in, in_len);
out_len[0] = in_len;
}
/**
* The default "uncompress" hook to call when no other compression is used
*/
void do_no_uncompress(char *dst, char *src, u32 len)
{
memcpy(dst, src, len);
}
/**
* The default "uncompress" hook to call when no other compression is used
*/
void uncompress_impossible(char *dst, char *src, u32 len)
{
fprintf(stderr,
"Cannot uncompress data (algorithm not compiled in).\n");
exit(1);
}
/**
* Create a new directory including any missing parent directories.
*
* NOTE: This function does not do complete path resolution as described in
* Linux path_resolution(2) and hence will fail for complex paths:
*
* e.g.: mkdirp_below("subdir", "subdir/../subdir/x", 0777);
*
* This call should create subdir/x, but since subdir/.. is outside subdir,
* the function returns an error.
*
* @param parent Return an error if a new directory would be created outside
* this directory. Pass "/" to allow new directories to be created anywhere.
* @param dirpath The new directory that should be created, the path can be
* either absolute or relative to the current working directory. (It is not
* relative to parent.)
* @param mode Permissions to use for newly created directories.
*/
int mkdirp_below(const char *parent, const char *dirpath, mode_t mode)
{
int ret = -1;
size_t dirsep, parlen, sublen;
char c, *r, *path = NULL, *subdir, rpar[PATH_MAX], rsub[PATH_MAX];
if (!dirpath) {
fprintf(stderr, "mkdirp_below: No new directory specified\n");
goto done;
}
path = strdup(dirpath);
if (!path) {
perror("Duplicate new directory failed:");
goto done;
}
if (NULL == realpath(parent, rpar)) {
fprintf(stderr, "realpath(%s) failed: %s\n", parent,
strerror(errno));
goto done;
}
parlen = strlen(rpar);
for (subdir = path, dirsep = 0; subdir[dirsep]; subdir += dirsep) {
dirsep = strcspn(subdir, "/\\");
if (!dirsep) {
subdir++;
continue;
}
c = subdir[dirsep];
subdir[dirsep] = 0;
r = realpath(path, rsub);
sublen = strlen(rsub);
if (NULL == r) {
if(ENOENT != errno) {
fprintf(stderr, "realpath(%s) failed: %s\n",
path, strerror(errno));
goto done;
}
} else if (sublen < parlen || strncmp(rpar, rsub, parlen)) {
fprintf(stderr, "Abort: %s is outside %s\n", dirpath,
parent);
goto done;
}
if(-1 == mkdir(path, mode) && EEXIST != errno) {
fprintf(stderr, "mkdir(%s): %s\n", path,
strerror(errno));
goto done;
}
subdir[dirsep] = c;
}
ret = 0;
done:
if (path)
free(path);
return ret;
}
static int handle_directory(const char *name)
{
int n;
int ret = -1;
struct dirent **namelist;
n = scandir(name, &namelist, 0, alphasort);
if (n < 0) {
fprintf(stderr, "Could not enter directory %s\n", name);
} else {
while (n--) {
char fullname[MAX_PATH];
fullname[0] = '\0';
if (strncmp("..", namelist[n]->d_name, 3) &&
strncmp(".", namelist[n]->d_name, 2)) {
strncpy(fullname, name, MAX_PATH);
if (name[(strlen(name)) - 1] != '/') {
strncat(fullname, "/", MAX_PATH);
}
strncat(fullname, namelist[n]->d_name,
MAX_PATH);
add_files(fullname);
}
free(namelist[n]);
}
free(namelist);
ret = 0;
}
return ret;
}
/*
* Add physically existing files to the file list.
* This function is used when an archive is created.
*/
int add_files(const char *name)
{
struct stat filestat;
int ret = -1;
char *realname;
char *c;
if (strstr(name, "nocompress:") == name) {
realname = strdup(name + 11);
} else {
realname = strdup(name);
}
if (realname == NULL) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
/* printf("... add_files %s\n", name); */
if (stat(realname, &filestat) == -1) {
fprintf(stderr, "Error getting file attributes of %s\n", name);
free(realname);
return -1;
}
if (S_ISCHR(filestat.st_mode) || S_ISBLK(filestat.st_mode)) {
fprintf(stderr, "Device files are not supported: %s\n", name);
}
if (S_ISFIFO(filestat.st_mode)) {
fprintf(stderr, "FIFOs are not supported: %s\n", name);
}
if (S_ISSOCK(filestat.st_mode)) {
fprintf(stderr, "Sockets are not supported: %s\n", name);
}
if (S_ISLNK(filestat.st_mode)) {
fprintf(stderr, "Symbolic links are not supported: %s\n", name);
}
// Is it a directory?
if (S_ISDIR(filestat.st_mode)) {
ret = handle_directory(realname);
}
// Is it a regular file?
if (S_ISREG(filestat.st_mode)) {
struct file *tmpfile;
/* printf("... adding %s\n", name); */
tmpfile = malloc(sizeof(struct file));
if (!tmpfile) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
tmpfile->name = strdup(name);
if (!tmpfile->name) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
tmpfile->next = files;
files = tmpfile;
ret = 0;
}
free(realname);
return ret;
}
/*
* Add files or directories as specified to the file list.
* This function is used when an archive is listed or extracted.
*/
int add_file_or_directory(const char *name)
{
struct file *tmpfile;
tmpfile = malloc(sizeof(struct file));
if (!tmpfile) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
tmpfile->name = strdup(name);
if (!tmpfile->name) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
tmpfile->next = files;
files = tmpfile;
return 0;
}
struct file *get_files(void)
{
return files;
}
void free_files(void)
{
struct file *temp;
while (files) {
temp = files;
files = files->next;
free(temp->name);
free(temp);
}
}
#ifdef DEBUG
int list_files(void)
{
struct file *walk = files;
printf("File list:\n");
while (walk) {
printf("- %s\n", walk->name);
walk = walk->next;
}
printf("-----\n");
return 0;
}
#endif