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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* glob.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "mkfs.h"
static const struct {
const char *name;
unsigned int clear_flag;
unsigned int set_flag;
} glob_scan_flags[] = {
{ "-type b", DIR_SCAN_NO_BLK, 0 },
{ "-type c", DIR_SCAN_NO_CHR, 0 },
{ "-type d", DIR_SCAN_NO_DIR, 0 },
{ "-type p", DIR_SCAN_NO_FIFO, 0 },
{ "-type f", DIR_SCAN_NO_FILE, 0 },
{ "-type l", DIR_SCAN_NO_SLINK, 0 },
{ "-type s", DIR_SCAN_NO_SOCK, 0 },
{ "-xdev", 0, DIR_SCAN_ONE_FILESYSTEM },
{ "-mount", 0, DIR_SCAN_ONE_FILESYSTEM },
{ "-keeptime", 0, DIR_SCAN_KEEP_TIME },
{ "-nonrecursive", 0, DIR_SCAN_NO_RECURSION },
};
static size_t name_string_length(const char *str)
{
size_t len = 0;
int start;
if (*str == '"' || *str == '\'') {
start = *str;
++len;
while (str[len] != '\0' && str[len] != start)
++len;
if (str[len] == start)
++len;
} else {
while (str[len] != '\0' && !isspace(str[len]))
++len;
}
return len;
}
static void quote_remove(char *str)
{
char *dst = str;
int start = *(str++);
if (start != '\'' && start != '"')
return;
while (*str != start && *str != '\0')
*(dst++) = *(str++);
*(dst++) = '\0';
}
static const char *skip_space(const char *str)
{
while (isspace(*str))
++str;
return str;
}
static bool match_option(const char **line, const char *candidate)
{
size_t len = strlen(candidate);
if (strncmp(*line, candidate, len) != 0 || !isspace((*line)[len]))
return false;
*line = skip_space(*line + len);
return true;
}
int glob_files(fstree_t *fs, const char *filename, size_t line_num,
const dir_entry_t *ent,
const char *basepath, unsigned int glob_flags,
const char *extra)
{
char *name_pattern = NULL, *prefix = NULL;
unsigned int scan_flags = 0, all_flags;
dir_iterator_t *dir = NULL;
bool first_clear_flag;
dir_tree_cfg_t cfg;
tree_node_t *root;
int ret;
/* fetch the actual target node */
root = fstree_get_node_by_path(fs, fs->root, ent->name, true, false);
if (root == NULL)
goto fail_path;
if (!S_ISDIR(root->mode))
goto fail_not_dir;
prefix = fstree_get_path(root);
if (prefix == NULL)
goto fail_alloc;
if (canonicalize_name(prefix) != 0)
goto fail_prefix;
/* process options */
first_clear_flag = true;
all_flags = DIR_SCAN_NO_BLK | DIR_SCAN_NO_CHR | DIR_SCAN_NO_DIR |
DIR_SCAN_NO_FIFO | DIR_SCAN_NO_FILE | DIR_SCAN_NO_SLINK |
DIR_SCAN_NO_SOCK;
while (extra != NULL && *extra == '-' && !match_option(&extra, "--")) {
bool is_name = false, is_path = false, found = false;
size_t count = sizeof(glob_scan_flags) /
sizeof(glob_scan_flags[0]);
for (size_t i = 0; i < count && !found; ++i) {
if (match_option(&extra, glob_scan_flags[i].name)) {
if (glob_scan_flags[i].clear_flag != 0 &&
first_clear_flag) {
scan_flags |= all_flags;
first_clear_flag = false;
}
scan_flags &= ~(glob_scan_flags[i].clear_flag);
scan_flags |= glob_scan_flags[i].set_flag;
found = true;
}
}
if (found)
continue;
if (match_option(&extra, "-name")) {
is_name = true;
} else if (match_option(&extra, "-path")) {
is_path = true;
}
if (is_name || is_path) {
size_t len = name_string_length(extra);
free(name_pattern);
name_pattern = strndup(extra, len);
if (name_pattern == NULL)
goto fail_alloc;
extra = skip_space(extra + len);
quote_remove(name_pattern);
if (is_path)
glob_flags |= DIR_SCAN_MATCH_FULL_PATH;
continue;
}
goto fail_unknown;
}
if (extra != NULL && *extra == '\0')
extra = NULL;
/* do the scan */
memset(&cfg, 0, sizeof(cfg));
cfg.flags = scan_flags | glob_flags;
cfg.def_mtime = ent->mtime;
cfg.def_uid = ent->uid;
cfg.def_gid = ent->gid;
cfg.def_mode = ent->mode;
cfg.prefix = prefix;
cfg.name_pattern = name_pattern;
if (basepath == NULL) {
dir = dir_tree_iterator_create(extra == NULL ? "." : extra,
&cfg);
} else {
size_t plen = strlen(basepath);
size_t slen = strlen(extra);
char *temp = calloc(1, plen + 1 + slen + 1);
if (temp == NULL)
goto fail_alloc;
memcpy(temp, basepath, plen);
temp[plen] = '/';
memcpy(temp + plen + 1, extra, slen);
temp[plen + 1 + slen] = '\0';
dir = dir_tree_iterator_create(temp, &cfg);
free(temp);
}
if (dir == NULL)
goto fail;
ret = fstree_from_dir(fs, dir);
sqfs_drop(dir);
free(name_pattern);
free(prefix);
return ret;
fail_unknown:
fprintf(stderr, "%s: " PRI_SZ ": unknown glob option: %s.\n",
filename, line_num, extra);
goto fail;
fail_path:
fprintf(stderr, "%s: " PRI_SZ ": %s: %s\n",
filename, line_num, ent->name, strerror(errno));
goto fail;
fail_not_dir:
fprintf(stderr, "%s: " PRI_SZ ": %s is not a directoy!\n",
filename, line_num, ent->name);
goto fail;
fail_prefix:
fprintf(stderr, "%s: " PRI_SZ ": error cannonicalizing `%s`!\n",
filename, line_num, prefix);
goto fail;
fail_alloc:
fprintf(stderr, "%s: " PRI_SZ ": out of memory\n",
filename, line_num);
goto fail;
fail:
free(name_pattern);
free(prefix);
return -1;
}
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