+#define _BSD_SOURCE
#include <glob.h>
#include <fnmatch.h>
#include <sys/stat.h>
#include <errno.h>
#include <stddef.h>
#include <unistd.h>
-#include <stdio.h>
-#include "libc.h"
+#include <pwd.h>
struct match
{
struct match *next;
- char name[1];
+ char name[];
};
-static int is_literal(const char *p, int useesc)
-{
- int bracket = 0;
- for (; *p; p++) {
- switch (*p) {
- case '\\':
- if (!useesc) break;
- case '?':
- case '*':
- return 0;
- case '[':
- bracket = 1;
- break;
- case ']':
- if (bracket) return 0;
- break;
- }
- }
- return 1;
-}
-
static int append(struct match **tail, const char *name, size_t len, int mark)
{
- struct match *new = malloc(sizeof(struct match) + len + 1);
+ struct match *new = malloc(sizeof(struct match) + len + 2);
if (!new) return -1;
(*tail)->next = new;
new->next = NULL;
- strcpy(new->name, name);
- if (mark) strcat(new->name, "/");
+ memcpy(new->name, name, len+1);
+ if (mark && len && name[len-1]!='/') {
+ new->name[len] = '/';
+ new->name[len+1] = 0;
+ }
*tail = new;
return 0;
}
-static int match_in_dir(const char *d, const char *p, int flags, int (*errfunc)(const char *path, int err), struct match **tail)
+static int do_glob(char *buf, size_t pos, int type, char *pat, int flags, int (*errfunc)(const char *path, int err), struct match **tail)
{
- DIR *dir;
- struct dirent de_buf, *de;
- char pat[strlen(p)+1];
- char *p2;
- size_t l = strlen(d);
- int literal;
- int fnm_flags= ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
- | ((!(flags & GLOB_PERIOD)) ? FNM_PERIOD : 0);
- int error;
-
- if ((p2 = strchr(p, '/'))) {
- strcpy(pat, p);
- pat[p2-p] = 0;
- for (; *p2 == '/'; p2++);
- p = pat;
- }
- literal = is_literal(p, !(flags & GLOB_NOESCAPE));
- if (*d == '/' && !*(d+1)) l = 0;
+ /* If GLOB_MARK is unused, we don't care about type. */
+ if (!type && !(flags & GLOB_MARK)) type = DT_REG;
- /* rely on opendir failing for nondirectory objects */
- dir = opendir(*d ? d : ".");
- error = errno;
- if (!dir) {
- /* this is not an error -- we let opendir call stat for us */
- if (error == ENOTDIR) return 0;
- if (error == EACCES && !*p) {
- struct stat st;
- if (!stat(d, &st) && S_ISDIR(st.st_mode)) {
- if (append(tail, d, l, l))
- return GLOB_NOSPACE;
- return 0;
- }
+ /* Special-case the remaining pattern being all slashes, in
+ * which case we can use caller-passed type if it's a dir. */
+ if (*pat && type!=DT_DIR) type = 0;
+ while (pos+1 < PATH_MAX && *pat=='/') buf[pos++] = *pat++;
+
+ /* Consume maximal [escaped-]literal prefix of pattern, copying
+ * and un-escaping it to the running buffer as we go. */
+ ptrdiff_t i=0, j=0;
+ int in_bracket = 0, overflow = 0;
+ for (; pat[i]!='*' && pat[i]!='?' && (!in_bracket || pat[i]!=']'); i++) {
+ if (!pat[i]) {
+ if (overflow) return 0;
+ pat += i;
+ pos += j;
+ i = j = 0;
+ break;
+ } else if (pat[i] == '[') {
+ in_bracket = 1;
+ } else if (pat[i] == '\\' && !(flags & GLOB_NOESCAPE)) {
+ /* Backslashes inside a bracket are (at least by
+ * our interpretation) non-special, so if next
+ * char is ']' we have a complete expression. */
+ if (in_bracket && pat[i+1]==']') break;
+ /* Unpaired final backslash never matches. */
+ if (!pat[i+1]) return 0;
+ i++;
}
- if (errfunc(d, error) || (flags & GLOB_ERR))
- return GLOB_ABORTED;
+ if (pat[i] == '/') {
+ if (overflow) return 0;
+ in_bracket = 0;
+ pat += i+1;
+ i = -1;
+ pos += j+1;
+ j = -1;
+ }
+ /* Only store a character if it fits in the buffer, but if
+ * a potential bracket expression is open, the overflow
+ * must be remembered and handled later only if the bracket
+ * is unterminated (and thereby a literal), so as not to
+ * disallow long bracket expressions with short matches. */
+ if (pos+(j+1) < PATH_MAX) {
+ buf[pos+j++] = pat[i];
+ } else if (in_bracket) {
+ overflow = 1;
+ } else {
+ return 0;
+ }
+ /* If we consume any new components, the caller-passed type
+ * or dummy type from above is no longer valid. */
+ type = 0;
+ }
+ buf[pos] = 0;
+ if (!*pat) {
+ /* If we consumed any components above, or if GLOB_MARK is
+ * requested and we don't yet know if the match is a dir,
+ * we must confirm the file exists and/or determine its type.
+ *
+ * If marking dirs, symlink type is inconclusive; we need the
+ * type for the symlink target, and therefore must try stat
+ * first unless type is known not to be a symlink. Otherwise,
+ * or if that fails, use lstat for determining existence to
+ * avoid false negatives in the case of broken symlinks. */
+ struct stat st;
+ if ((flags & GLOB_MARK) && (!type||type==DT_LNK) && !stat(buf, &st)) {
+ if (S_ISDIR(st.st_mode)) type = DT_DIR;
+ else type = DT_REG;
+ }
+ if (!type && lstat(buf, &st)) {
+ if (errno!=ENOENT && (errfunc(buf, errno) || (flags & GLOB_ERR)))
+ return GLOB_ABORTED;
+ return 0;
+ }
+ if (append(tail, buf, pos, (flags & GLOB_MARK) && type==DT_DIR))
+ return GLOB_NOSPACE;
return 0;
}
- if (!*p) {
- error = append(tail, d, l, l) ? GLOB_NOSPACE : 0;
- closedir(dir);
- return error;
+ char *p2 = strchr(pat, '/'), saved_sep = '/';
+ /* Check if the '/' was escaped and, if so, remove the escape char
+ * so that it will not be unpaired when passed to fnmatch. */
+ if (p2 && !(flags & GLOB_NOESCAPE)) {
+ char *p;
+ for (p=p2; p>pat && p[-1]=='\\'; p--);
+ if ((p2-p)%2) {
+ p2--;
+ saved_sep = '\\';
+ }
+ }
+ DIR *dir = opendir(pos ? buf : ".");
+ if (!dir) {
+ if (errfunc(buf, errno) || (flags & GLOB_ERR))
+ return GLOB_ABORTED;
+ return 0;
}
- while (!(error = readdir_r(dir, &de_buf, &de)) && de) {
- char namebuf[l+de->d_reclen+2], *name = namebuf;
- if (!literal && fnmatch(p, de->d_name, fnm_flags))
+ int old_errno = errno;
+ struct dirent *de;
+ while (errno=0, de=readdir(dir)) {
+ /* Quickly skip non-directories when there's pattern left. */
+ if (p2 && de->d_type && de->d_type!=DT_DIR && de->d_type!=DT_LNK)
continue;
- if (literal && strcmp(p, de->d_name))
+
+ size_t l = strlen(de->d_name);
+ if (l >= PATH_MAX-pos) continue;
+
+ if (p2) *p2 = 0;
+
+ int fnm_flags= ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
+ | ((!(flags & GLOB_PERIOD)) ? FNM_PERIOD : 0);
+
+ if (fnmatch(pat, de->d_name, fnm_flags))
continue;
- if (p2 && de->d_type && !S_ISDIR(de->d_type<<12) && !S_ISLNK(de->d_type<<12))
+
+ /* With GLOB_PERIOD, don't allow matching . or .. unless
+ * fnmatch would match them with FNM_PERIOD rules in effect. */
+ if (p2 && (flags & GLOB_PERIOD) && de->d_name[0]=='.'
+ && (!de->d_name[1] || de->d_name[1]=='.' && !de->d_name[2])
+ && fnmatch(pat, de->d_name, fnm_flags | FNM_PERIOD))
continue;
- if (*d) {
- memcpy(name, d, l);
- name[l] = '/';
- strcpy(name+l+1, de->d_name);
- } else {
- name = de->d_name;
- }
- if (p2) {
- if ((error = match_in_dir(name, p2, flags, errfunc, tail))) {
- closedir(dir);
- return error;
- }
- } else {
- int mark = 0;
- if (flags & GLOB_MARK) {
- if (de->d_type)
- mark = S_ISDIR(de->d_type<<12);
- else {
- struct stat st;
- stat(name, &st);
- mark = S_ISDIR(st.st_mode);
- }
- }
- if (append(tail, name, l+de->d_reclen+1, mark)) {
- closedir(dir);
- return GLOB_NOSPACE;
- }
+
+ memcpy(buf+pos, de->d_name, l+1);
+ if (p2) *p2 = saved_sep;
+ int r = do_glob(buf, pos+l, de->d_type, p2 ? p2 : "", flags, errfunc, tail);
+ if (r) {
+ closedir(dir);
+ return r;
}
}
+ int readerr = errno;
+ if (p2) *p2 = saved_sep;
closedir(dir);
- if (error && (errfunc(d, error) || (flags & GLOB_ERR)))
+ if (readerr && (errfunc(buf, errno) || (flags & GLOB_ERR)))
return GLOB_ABORTED;
+ errno = old_errno;
return 0;
}
return strcmp(*(const char **)a, *(const char **)b);
}
-int glob(const char *pat, int flags, int (*errfunc)(const char *path, int err), glob_t *g)
+static int expand_tilde(char **pat, char *buf, size_t *pos)
+{
+ char *p = *pat + 1;
+ size_t i = 0;
+
+ char delim, *name_end = __strchrnul(p, '/');
+ if ((delim = *name_end)) *name_end++ = 0;
+ *pat = name_end;
+
+ char *home = *p ? NULL : getenv("HOME");
+ if (!home) {
+ struct passwd pw, *res;
+ switch (*p ? getpwnam_r(p, &pw, buf, PATH_MAX, &res)
+ : getpwuid_r(getuid(), &pw, buf, PATH_MAX, &res)) {
+ case ENOMEM:
+ return GLOB_NOSPACE;
+ case 0:
+ if (!res)
+ default:
+ return GLOB_NOMATCH;
+ }
+ home = pw.pw_dir;
+ }
+ while (i < PATH_MAX - 2 && *home)
+ buf[i++] = *home++;
+ if (*home)
+ return GLOB_NOMATCH;
+ if ((buf[i] = delim))
+ buf[++i] = 0;
+ *pos = i;
+ return 0;
+}
+
+int glob(const char *restrict pat, int flags, int (*errfunc)(const char *path, int err), glob_t *restrict g)
{
- const char *p=pat, *d;
struct match head = { .next = NULL }, *tail = &head;
size_t cnt, i;
size_t offs = (flags & GLOB_DOOFFS) ? g->gl_offs : 0;
int error = 0;
+ char buf[PATH_MAX];
- if (*p == '/') {
- for (; *p == '/'; p++);
- d = "/";
- } else {
- d = "";
- }
-
- if (strlen(p) > PATH_MAX) return GLOB_NOSPACE;
-
if (!errfunc) errfunc = ignore_err;
if (!(flags & GLOB_APPEND)) {
g->gl_pathv = NULL;
}
- if (*p) error = match_in_dir(d, p, flags, errfunc, &tail);
+ if (*pat) {
+ char *p = strdup(pat);
+ if (!p) return GLOB_NOSPACE;
+ buf[0] = 0;
+ size_t pos = 0;
+ char *s = p;
+ if ((flags & (GLOB_TILDE | GLOB_TILDE_CHECK)) && *p == '~')
+ error = expand_tilde(&s, buf, &pos);
+ if (!error)
+ error = do_glob(buf, pos, 0, s, flags, errfunc, &tail);
+ free(p);
+ }
+
if (error == GLOB_NOSPACE) {
freelist(&head);
return error;
g->gl_pathv = NULL;
}
-LFS64(glob);
-LFS64(globfree);
+weak_alias(glob, glob64);
+weak_alias(globfree, globfree64);
projects / musl / blobdiff