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-rw-r--r--lib/fstree/fstree_from_file.c216
1 files changed, 192 insertions, 24 deletions
diff --git a/lib/fstree/fstree_from_file.c b/lib/fstree/fstree_from_file.c
index 5e2fd87..c8a86bf 100644
--- a/lib/fstree/fstree_from_file.c
+++ b/lib/fstree/fstree_from_file.c
@@ -14,9 +14,43 @@
#include <errno.h>
#include <ctype.h>
+struct glob_context {
+ struct stat *basic;
+ unsigned int glob_flags;
+};
+
+enum {
+ GLOB_MODE_FROM_SRC = 0x01,
+ GLOB_UID_FROM_SRC = 0x02,
+ GLOB_GID_FROM_SRC = 0x04,
+};
+
+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 int add_generic(fstree_t *fs, const char *filename, size_t line_num,
- const char *path, struct stat *sb, const char *extra)
+ const char *path, struct stat *sb,
+ const char *basepath, unsigned int glob_flags,
+ const char *extra)
{
+ (void)basepath;
+ (void)glob_flags;
+
if (fstree_add_generic(fs, path, sb, extra) == NULL) {
fprintf(stderr, "%s: " PRI_SZ ": %s: %s\n",
filename, line_num, path, strerror(errno));
@@ -27,7 +61,8 @@ static int add_generic(fstree_t *fs, const char *filename, size_t line_num,
}
static int add_device(fstree_t *fs, const char *filename, size_t line_num,
- const char *path, struct stat *sb, const char *extra)
+ const char *path, struct stat *sb, const char *basepath,
+ unsigned int glob_flags, const char *extra)
{
unsigned int maj, min;
char c;
@@ -50,21 +85,28 @@ static int add_device(fstree_t *fs, const char *filename, size_t line_num,
}
sb->st_rdev = makedev(maj, min);
- return add_generic(fs, filename, line_num, path, sb, NULL);
+ return add_generic(fs, filename, line_num, path, sb, basepath,
+ glob_flags, NULL);
}
static int add_file(fstree_t *fs, const char *filename, size_t line_num,
- const char *path, struct stat *basic, const char *extra)
+ const char *path, struct stat *basic, const char *basepath,
+ unsigned int glob_flags, const char *extra)
{
if (extra == NULL || *extra == '\0')
extra = path;
- return add_generic(fs, filename, line_num, path, basic, extra);
+ return add_generic(fs, filename, line_num, path, basic,
+ basepath, glob_flags, extra);
}
static int add_hard_link(fstree_t *fs, const char *filename, size_t line_num,
- const char *path, struct stat *basic, const char *extra)
+ const char *path, struct stat *basic,
+ const char *basepath, unsigned int glob_flags,
+ const char *extra)
{
+ (void)basepath;
+ (void)glob_flags;
(void)basic;
if (fstree_add_hard_link(fs, path, extra) == NULL) {
@@ -75,20 +117,123 @@ static int add_hard_link(fstree_t *fs, const char *filename, size_t line_num,
return 0;
}
+static int glob_node_callback(void *user, fstree_t *fs, tree_node_t *node)
+{
+ struct glob_context *ctx = user;
+ (void)fs;
+
+ if (!(ctx->glob_flags & GLOB_MODE_FROM_SRC)) {
+ node->mode &= ~(07777);
+ node->mode |= ctx->basic->st_mode & 07777;
+ }
+
+ if (!(ctx->glob_flags & GLOB_UID_FROM_SRC))
+ node->uid = ctx->basic->st_uid;
+
+ if (!(ctx->glob_flags & GLOB_GID_FROM_SRC))
+ node->gid = ctx->basic->st_gid;
+
+ return 0;
+}
+
+static int glob_files(fstree_t *fs, const char *filename, size_t line_num,
+ const char *path, struct stat *basic,
+ const char *basepath, unsigned int glob_flags,
+ const char *extra)
+{
+ unsigned int scan_flags = 0, all_flags;
+ struct glob_context ctx;
+ bool first_clear_flag;
+ size_t i, count, len;
+ tree_node_t *root;
+ int ret;
+
+ memset(&ctx, 0, sizeof(ctx));
+ ctx.basic = basic;
+ ctx.glob_flags = glob_flags;
+
+ /* fetch the actual target node */
+ root = fstree_get_node_by_path(fs, fs->root, path, true, false);
+ if (root == NULL) {
+ fprintf(stderr, "%s: " PRI_SZ ": %s: %s\n",
+ filename, line_num, path, strerror(errno));
+ return -1;
+ }
+
+ /* 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 != '\0') {
+ count = sizeof(glob_scan_flags) / sizeof(glob_scan_flags[0]);
+
+ for (i = 0; i < count; ++i) {
+ len = strlen(glob_scan_flags[i].name);
+ if (strncmp(extra, glob_scan_flags[i].name, len) != 0)
+ continue;
+
+ if (isspace(extra[len])) {
+ extra += len;
+ while (isspace(*extra))
+ ++extra;
+ break;
+ }
+ }
+
+ if (i < count) {
+ 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;
+ continue;
+ }
+ break;
+ }
+
+ if (*extra == '\0') {
+ fprintf(stderr, "%s: " PRI_SZ ": glob path missing.\n",
+ filename, line_num);
+ return -1;
+ }
+
+ /* do the scan */
+ if (basepath == NULL) {
+ ret = fstree_from_dir(fs, root, extra, glob_node_callback,
+ &ctx, scan_flags);
+ } else {
+ ret = fstree_from_subdir(fs, root, basepath, extra,
+ glob_node_callback, &ctx,
+ scan_flags);
+ }
+
+ return ret;
+}
+
static const struct callback_t {
const char *keyword;
unsigned int mode;
bool need_extra;
+ bool is_glob;
int (*callback)(fstree_t *fs, const char *filename, size_t line_num,
- const char *path, struct stat *sb, const char *extra);
+ const char *path, struct stat *sb,
+ const char *basepath, unsigned int glob_flags,
+ const char *extra);
} file_list_hooks[] = {
- { "dir", S_IFDIR, false, add_generic },
- { "slink", S_IFLNK, true, add_generic },
- { "link", 0, true, add_hard_link },
- { "nod", 0, true, add_device },
- { "pipe", S_IFIFO, false, add_generic },
- { "sock", S_IFSOCK, false, add_generic },
- { "file", S_IFREG, false, add_file },
+ { "dir", S_IFDIR, false, false, add_generic },
+ { "slink", S_IFLNK, true, false, add_generic },
+ { "link", 0, true, false, add_hard_link },
+ { "nod", 0, true, false, add_device },
+ { "pipe", S_IFIFO, false, false, add_generic },
+ { "sock", S_IFSOCK, false, false, add_generic },
+ { "file", S_IFREG, false, false, add_file },
+ { "glob", 0, true, true, glob_files },
};
#define NUM_HOOKS (sizeof(file_list_hooks) / sizeof(file_list_hooks[0]))
@@ -160,10 +305,12 @@ static char *read_str(char *str, char **out)
}
static int handle_line(fstree_t *fs, const char *filename,
- size_t line_num, char *line)
+ size_t line_num, char *line,
+ const char *basepath)
{
const char *extra = NULL, *msg = NULL;
const struct callback_t *cb = NULL;
+ unsigned int glob_flags = 0;
sqfs_u32 uid, gid, mode;
struct stat sb;
char *path;
@@ -189,20 +336,38 @@ static int handle_line(fstree_t *fs, const char *filename,
if (canonicalize_name(path) || *path == '\0')
goto fail_ent;
- if ((line = read_u32(line, &mode, 8)) == NULL || mode > 07777)
- goto fail_mode;
+ if (cb->is_glob && *line == '*') {
+ ++line;
+ mode = 0;
+ glob_flags |= GLOB_MODE_FROM_SRC;
+ } else {
+ if ((line = read_u32(line, &mode, 8)) == NULL || mode > 07777)
+ goto fail_mode;
+ }
if ((line = skip_space(line)) == NULL)
goto fail_ent;
- if ((line = read_u32(line, &uid, 10)) == NULL)
- goto fail_uid_gid;
+ if (cb->is_glob && *line == '*') {
+ ++line;
+ uid = 0;
+ glob_flags |= GLOB_UID_FROM_SRC;
+ } else {
+ if ((line = read_u32(line, &uid, 10)) == NULL)
+ goto fail_uid_gid;
+ }
if ((line = skip_space(line)) == NULL)
goto fail_ent;
- if ((line = read_u32(line, &gid, 10)) == NULL)
- goto fail_uid_gid;
+ if (cb->is_glob && *line == '*') {
+ ++line;
+ gid = 0;
+ glob_flags |= GLOB_GID_FROM_SRC;
+ } else {
+ if ((line = read_u32(line, &gid, 10)) == NULL)
+ goto fail_uid_gid;
+ }
if ((line = skip_space(line)) != NULL && *line != '\0')
extra = line;
@@ -217,7 +382,8 @@ static int handle_line(fstree_t *fs, const char *filename,
sb.st_uid = uid;
sb.st_gid = gid;
- return cb->callback(fs, filename, line_num, path, &sb, extra);
+ return cb->callback(fs, filename, line_num, path,
+ &sb, basepath, glob_flags, extra);
fail_no_extra:
fprintf(stderr, "%s: " PRI_SZ ": missing argument for %s.\n",
filename, line_num, cb->keyword);
@@ -241,7 +407,7 @@ out_desc:
return -1;
}
-int fstree_from_file(fstree_t *fs, const char *filename)
+int fstree_from_file(fstree_t *fs, const char *filename, const char *basepath)
{
size_t line_num = 1;
istream_t *fp;
@@ -261,8 +427,10 @@ int fstree_from_file(fstree_t *fs, const char *filename)
break;
if (line[0] != '#') {
- if (handle_line(fs, filename, line_num, line))
+ if (handle_line(fs, filename, line_num,
+ line, basepath)) {
goto fail_line;
+ }
}
free(line);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 20:58:19 +0000