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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* describe.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "rdsquashfs.h"
static int print_name(const sqfs_tree_node_t *n, bool dont_escape)
{
char *start, *ptr, *name = sqfs_tree_node_get_path(n);
if (name == NULL) {
perror("Recovering file path of tree node");
return -1;
}
if (canonicalize_name(name) != 0) {
fprintf(stderr, "Error sanitizing file path '%s'\n", name);
free(name);
return -1;
}
if (dont_escape || (strchr(name, ' ') == NULL &&
strchr(name, '"') == NULL)) {
fputs(name, stdout);
} else {
fputc('"', stdout);
ptr = strchr(name, '"');
if (ptr != NULL) {
start = name;
do {
fwrite(start, 1, ptr - start, stdout);
fputs("\\\"", stdout);
start = ptr + 1;
ptr = strchr(start, '"');
} while (ptr != NULL);
fputs(start, stdout);
} else {
fputs(name, stdout);
}
fputc('"', stdout);
}
free(name);
return 0;
}
static void print_perm(const sqfs_tree_node_t *n)
{
printf(" 0%o %d %d", n->inode->base.mode & (~S_IFMT), n->uid, n->gid);
}
static int print_simple(const char *type, const sqfs_tree_node_t *n,
const char *extra)
{
printf("%s ", type);
if (print_name(n, false))
return -1;
print_perm(n);
if (extra != NULL)
printf(" %s", extra);
fputc('\n', stdout);
return 0;
}
int describe_tree(const sqfs_tree_node_t *root, const char *unpack_root)
{
const sqfs_tree_node_t *n;
if (!is_filename_sane((const char *)root->name, false)) {
fprintf(stderr, "Encountered illegal file name '%s'\n",
root->name);
return -1;
}
switch (root->inode->base.mode & S_IFMT) {
case S_IFSOCK:
return print_simple("sock", root, NULL);
case S_IFLNK:
return print_simple("slink", root,
(const char *)root->inode->extra);
case S_IFIFO:
return print_simple("pipe", root, NULL);
case S_IFREG:
if (unpack_root == NULL)
return print_simple("file", root, NULL);
fputs("file ", stdout);
if (print_name(root, false))
return -1;
print_perm(root);
printf(" %s/", unpack_root);
if (print_name(root, true))
return -1;
fputc('\n', stdout);
break;
case S_IFCHR:
case S_IFBLK: {
char buffer[32];
sqfs_u32 devno;
if (root->inode->base.type == SQFS_INODE_EXT_BDEV ||
root->inode->base.type == SQFS_INODE_EXT_CDEV) {
devno = root->inode->data.dev_ext.devno;
} else {
devno = root->inode->data.dev.devno;
}
sprintf(buffer, "%c %d %d",
S_ISCHR(root->inode->base.mode) ? 'c' : 'b',
major(devno), minor(devno));
return print_simple("nod", root, buffer);
}
case S_IFDIR:
if (root->name[0] != '\0') {
if (print_simple("dir", root, NULL))
return -1;
}
for (n = root->children; n != NULL; n = n->next) {
if (describe_tree(n, unpack_root))
return -1;
}
break;
default:
break;
}
return 0;
}
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