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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "fstree.h"
#include "util.h"
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
static char *get_file_path(tree_node_t *n, const char *name)
{
char *ptr, *new;
if (n->parent == NULL) {
ptr = strdup(name);
if (ptr == NULL)
goto fail;
return ptr;
}
ptr = fstree_get_path(n);
if (ptr == NULL)
goto fail;
assert(canonicalize_name(ptr) == 0);
new = realloc(ptr, strlen(ptr) + strlen(name) + 2);
if (new == NULL)
goto fail;
ptr = new;
strcat(ptr, "/");
strcat(ptr, name);
return ptr;
fail:
perror("getting absolute file path");
free(ptr);
return NULL;
}
static int populate_dir(fstree_t *fs, tree_node_t *root, bool keep_time_stamps)
{
char *extra = NULL;
struct dirent *ent;
struct stat sb;
tree_node_t *n;
DIR *dir;
dir = opendir(".");
if (dir == NULL) {
perror("opendir");
return -1;
}
for (;;) {
errno = 0;
ent = readdir(dir);
if (ent == NULL) {
if (errno) {
perror("readdir");
goto fail;
}
break;
}
if (!strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "."))
continue;
if (fstatat(AT_FDCWD, ent->d_name, &sb, AT_SYMLINK_NOFOLLOW)) {
perror(ent->d_name);
goto fail;
}
if (S_ISLNK(sb.st_mode)) {
extra = calloc(1, sb.st_size + 1);
if (extra == NULL)
goto fail_rdlink;
if (readlink(ent->d_name, extra, sb.st_size) < 0)
goto fail_rdlink;
extra[sb.st_size] = '\0';
} else if (S_ISREG(sb.st_mode)) {
extra = get_file_path(root, ent->d_name);
if (extra == NULL)
goto fail;
}
if (!keep_time_stamps) {
sb.st_atim = fs->defaults.st_atim;
sb.st_mtim = fs->defaults.st_mtim;
sb.st_ctim = fs->defaults.st_ctim;
}
n = fstree_mknode(fs, root, ent->d_name, strlen(ent->d_name),
extra, &sb);
if (n == NULL) {
perror("creating tree node");
goto fail;
}
free(extra);
extra = NULL;
}
closedir(dir);
for (n = root->data.dir->children; n != NULL; n = n->next) {
if (S_ISDIR(n->mode)) {
if (pushd(n->name))
return -1;
if (populate_dir(fs, n, keep_time_stamps))
return -1;
if (popd())
return -1;
}
}
return 0;
fail_rdlink:
perror("readlink");
fail:
closedir(dir);
free(extra);
return -1;
}
int fstree_from_dir(fstree_t *fs, const char *path, bool keep_time_stamps)
{
int ret;
if (pushd(path))
return -1;
ret = populate_dir(fs, fs->root, keep_time_stamps);
if (popd())
ret = -1;
return ret;
}
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