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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* node_compare.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
int node_compare(sqfsdiff_t *sd, tree_node_t *a, tree_node_t *b)
{
char *path = node_path(a);
tree_node_t *ait, *bit;
int ret, status = 0;
if (path == NULL)
return -1;
if ((a->mode & S_IFMT) != (b->mode & S_IFMT)) {
fprintf(stdout, "%s has a different type\n", path);
free(path);
return 1;
}
if (!(sd->compare_flags & COMPARE_NO_PERM)) {
if ((a->mode & ~S_IFMT) != (b->mode & ~S_IFMT)) {
fprintf(stdout, "%s has different permissions\n",
path);
status = 1;
}
}
if (!(sd->compare_flags & COMPARE_NO_OWNER)) {
if (a->uid != b->uid || a->gid != b->gid) {
fprintf(stdout, "%s has different ownership\n", path);
status = 1;
}
}
if (sd->compare_flags & COMPARE_TIMESTAMP) {
if (a->mod_time != b->mod_time) {
fprintf(stdout, "%s has a different timestamp\n", path);
status = 1;
}
}
if (sd->compare_flags & COMPARE_INODE_NUM) {
if (a->inode_num != b->inode_num) {
fprintf(stdout, "%s has a different inode number\n",
path);
status = 1;
}
}
switch (a->mode & S_IFMT) {
case S_IFSOCK:
case S_IFIFO:
break;
case S_IFBLK:
case S_IFCHR:
if (a->data.devno != b->data.devno) {
fprintf(stdout, "%s has different device number\n",
path);
status = 1;
}
break;
case S_IFLNK:
if (strcmp(a->data.slink_target, b->data.slink_target) != 0) {
fprintf(stdout, "%s has a different link target\n",
path);
}
break;
case S_IFDIR:
ret = compare_dir_entries(a, b);
if (ret < 0) {
status = -1;
break;
}
if (ret > 0)
status = 1;
free(path);
path = NULL;
ait = a->data.dir->children;
bit = b->data.dir->children;
while (ait != NULL && bit != NULL) {
ret = node_compare(sd, ait, bit);
if (ret < 0)
return -1;
if (ret > 0)
status = 1;
ait = ait->next;
bit = bit->next;
}
break;
case S_IFREG:
ret = compare_files(sd, a->data.file, b->data.file, path);
if (ret < 0) {
status = -1;
} else if (ret > 0) {
fprintf(stdout, "regular file %s differs\n", path);
status = 1;
}
break;
default:
fprintf(stdout, "%s has unknown type, ignoring\n", path);
break;
}
free(path);
return status;
}
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