[apple/libc.git] / stdlib / FreeBSD / realpath.c.patch

--- realpath.c.orig	2010-06-24 17:32:55.000000000 -0700
+++ realpath.c	2010-06-25 13:46:50.000000000 -0700
@@ -35,13 +35,41 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/
 #include "namespace.h"
 #include <sys/param.h>
 #include <sys/stat.h>
+#include <sys/mount.h>
 
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/attr.h>
+#include <sys/vnode.h>
 #include "un-namespace.h"
 
+struct attrs {
+	u_int32_t len;
+	attrreference_t name;
+	dev_t dev;
+	fsobj_type_t type;
+	fsobj_id_t id;
+	char buf[PATH_MAX];
+};
+
+#ifndef BUILDING_VARIANT
+__private_extern__ struct attrlist _rp_alist = {
+	ATTR_BIT_MAP_COUNT,
+	0,
+	ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_OBJTYPE | ATTR_CMN_OBJID,
+	0,
+	0,
+	0,
+	0,
+};
+#else /* BUILDING_VARIANT */
+__private_extern__ struct attrlist _rp_alist;
+#endif /* BUILDING_VARIANT */
+
+extern char * __private_getcwd(char *, size_t, int);
+
 /*
  * char *realpath(const char *path, char resolved[PATH_MAX]);
  *
@@ -50,36 +78,89 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/
  * in which case the path which caused trouble is left in (resolved).
  */
 char *
-realpath(const char *path, char resolved[PATH_MAX])
+realpath(const char *path, char inresolved[PATH_MAX])
 {
+	struct attrs attrs;
 	struct stat sb;
 	char *p, *q, *s;
-	size_t left_len, resolved_len;
+	size_t left_len, resolved_len, save_resolved_len;
 	unsigned symlinks;
-	int serrno, slen;
+	int serrno, slen, useattrs, islink;
 	char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX];
+	dev_t dev, lastdev;
+	struct statfs sfs;
+	static dev_t rootdev;
+	static int rootdev_inited = 0;
+	ino_t inode;
+	char *resolved;
 
+	if (path == NULL) {
+		errno = EINVAL;
+		return (NULL);
+	}
+#if __DARWIN_UNIX03
+	if (*path == 0) {
+		errno = ENOENT;
+		return (NULL);
+	}
+#endif /* __DARWIN_UNIX03 */
+	/*
+	 * Extension to the standard; if inresolved == NULL, allocate memory
+	 */
+	if (!inresolved) {
+	    if ((resolved = malloc(PATH_MAX)) == NULL) return (NULL);
+	} else {
+	    resolved = inresolved;
+	}
+	if (!rootdev_inited) {
+		rootdev_inited = 1;
+		if (stat("/", &sb) < 0) {
+error_return:
+			if (!inresolved) {
+				int e = errno;
+				free(resolved);
+				errno = e;
+			}
+			return (NULL);
+		}
+		rootdev = sb.st_dev;
+	}
 	serrno = errno;
 	symlinks = 0;
 	if (path[0] == '/') {
 		resolved[0] = '/';
 		resolved[1] = '\0';
-		if (path[1] == '\0')
+		if (path[1] == '\0') {
 			return (resolved);
+		}
 		resolved_len = 1;
 		left_len = strlcpy(left, path + 1, sizeof(left));
 	} else {
-		if (getcwd(resolved, PATH_MAX) == NULL) {
+#if !defined(VARIANT_DARWINEXTSN) && __DARWIN_UNIX03
+		/* 4447159: don't use GETPATH, so this will fail if */
+		/* if parent directories are not readable, as per POSIX */
+		if (__private_getcwd(resolved, PATH_MAX, 0) == NULL)
+#else /* VARIANT_DARWINEXTSN || !__DARWIN_UNIX03 */
+		if (__private_getcwd(resolved, PATH_MAX, 1) == NULL)
+#endif /* !VARIANT_DARWINEXTSN && __DARWIN_UNIX03 */
+		{
 			strlcpy(resolved, ".", PATH_MAX);
-			return (NULL);
+			goto error_return;
 		}
 		resolved_len = strlen(resolved);
 		left_len = strlcpy(left, path, sizeof(left));
 	}
 	if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) {
 		errno = ENAMETOOLONG;
-		return (NULL);
+		goto error_return;
 	}
+	if (resolved_len > 1) {
+		if (stat(resolved, &sb) < 0) {
+			goto error_return;
+		}
+		lastdev = sb.st_dev;
+	} else
+		lastdev = rootdev;
 
 	/*
 	 * Iterate over path components in `left'.
@@ -93,7 +174,7 @@ realpath(const char *path, char resolved
 		s = p ? p : left + left_len;
 		if (s - left >= sizeof(next_token)) {
 			errno = ENAMETOOLONG;
-			return (NULL);
+			goto error_return;
 		}
 		memcpy(next_token, left, s - left);
 		next_token[s - left] = '\0';
@@ -103,7 +184,7 @@ realpath(const char *path, char resolved
 		if (resolved[resolved_len - 1] != '/') {
 			if (resolved_len + 1 >= PATH_MAX) {
 				errno = ENAMETOOLONG;
-				return (NULL);
+				goto error_return;
 			}
 			resolved[resolved_len++] = '/';
 			resolved[resolved_len] = '\0';
@@ -127,6 +208,13 @@ realpath(const char *path, char resolved
 		}
 
 		/*
+		 * Save resolved_len, so that we can later null out
+		 * the the appended next_token, and replace with the
+		 * real name (matters on case-insensitive filesystems).
+		 */
+		save_resolved_len = resolved_len;
+
+		/*
 		 * Append the next path component and lstat() it. If
 		 * lstat() fails we still can return successfully if
 		 * there are no more path components left.
@@ -134,27 +222,89 @@ realpath(const char *path, char resolved
 		resolved_len = strlcat(resolved, next_token, PATH_MAX);
 		if (resolved_len >= PATH_MAX) {
 			errno = ENAMETOOLONG;
-			return (NULL);
+			goto error_return;
 		}
-		if (lstat(resolved, &sb) != 0) {
+		if (getattrlist(resolved, &_rp_alist, &attrs, sizeof(attrs), FSOPT_NOFOLLOW) == 0) {
+			useattrs = 1;
+			islink = (attrs.type == VLNK);
+			dev = attrs.dev;
+			inode = attrs.id.fid_objno;
+		} else if (errno == ENOTSUP || errno == EINVAL) {
+			if ((useattrs = lstat(resolved, &sb)) == 0) {
+				islink = S_ISLNK(sb.st_mode);
+				dev = sb.st_dev;
+				inode = sb.st_ino;
+			}
+		} else
+			useattrs = -1;
+		if (useattrs < 0) {
+#if !__DARWIN_UNIX03
 			if (errno == ENOENT && p == NULL) {
 				errno = serrno;
 				return (resolved);
 			}
-			return (NULL);
+#endif /* !__DARWIN_UNIX03 */
+			goto error_return;
 		}
-		if (S_ISLNK(sb.st_mode)) {
+		if (dev != lastdev) {
+			/*
+			 * We have crossed a mountpoint.  For volumes like UDF
+			 * the getattrlist name may not match the actual
+			 * mountpoint, so we just copy the mountpoint directly.
+			 * (3703138).  However, the mountpoint may not be
+			 * accessible, as when chroot-ed, so check first.
+			 * There may be a file on the chroot-ed volume with
+			 * the same name as the mountpoint, so compare device
+			 * and inode numbers.
+			 */
+			lastdev = dev;
+			if (statfs(resolved, &sfs) == 0 && lstat(sfs.f_mntonname, &sb) == 0 && dev == sb.st_dev && inode == sb.st_ino) {
+				/*
+				 * However, it's possible that the mountpoint
+				 * path matches, even though it isn't the real
+				 * path in the chroot-ed environment, so check
+				 * that each component of the mountpoint
+				 * is a directory (and not a symlink)
+				 */
+				char temp[sizeof(sfs.f_mntonname)];
+				char *cp;
+				int ok = 1;
+
+				strcpy(temp, sfs.f_mntonname);
+				for(;;) {
+					if ((cp = strrchr(temp, '/')) == NULL) {
+						ok = 0;
+						break;
+					}
+					if (cp <= temp)
+						break;
+					*cp = 0;
+					if (lstat(temp, &sb) < 0 || (sb.st_mode & S_IFMT) != S_IFDIR) {
+						ok = 0;
+						break;
+					}
+				}
+				if (ok) {
+					resolved_len = strlcpy(resolved, sfs.f_mntonname, PATH_MAX);
+					continue;
+				}
+			}
+			/* if we fail, use the other methods. */
+		}
+		if (islink) {
 			if (symlinks++ > MAXSYMLINKS) {
 				errno = ELOOP;
-				return (NULL);
+				goto error_return;
 			}
 			slen = readlink(resolved, symlink, sizeof(symlink) - 1);
-			if (slen < 0)
-				return (NULL);
+			if (slen < 0) {
+				goto error_return;
+			}
 			symlink[slen] = '\0';
 			if (symlink[0] == '/') {
 				resolved[1] = 0;
 				resolved_len = 1;
+				lastdev = rootdev;
 			} else if (resolved_len > 1) {
 				/* Strip the last path component. */
 				resolved[resolved_len - 1] = '\0';
@@ -172,7 +322,7 @@ realpath(const char *path, char resolved
 				if (symlink[slen - 1] != '/') {
 					if (slen + 1 >= sizeof(symlink)) {
 						errno = ENAMETOOLONG;
-						return (NULL);
+						goto error_return;
 					}
 					symlink[slen] = '/';
 					symlink[slen + 1] = 0;
@@ -180,11 +330,34 @@ realpath(const char *path, char resolved
 				left_len = strlcat(symlink, left, sizeof(left));
 				if (left_len >= sizeof(left)) {
 					errno = ENAMETOOLONG;
-					return (NULL);
+					goto error_return;
 				}
 			}
 			left_len = strlcpy(left, symlink, sizeof(left));
+		} else if (useattrs) {
+			/*
+			 * attrs already has the real name.
+			 */
+
+			resolved[save_resolved_len] = '\0';
+			resolved_len = strlcat(resolved, (const char *)&attrs.name + attrs.name.attr_dataoffset, PATH_MAX);
+			if (resolved_len >= PATH_MAX) {
+				errno = ENAMETOOLONG;
+				goto error_return;
+			}
 		}
+		/*
+		 * For the case of useattrs == 0, we could scan the directory
+		 * and try to match the inode.  There are many problems with
+		 * this: (1) the directory may not be readable, (2) for multiple
+		 * hard links, we would find the first, but not necessarily
+		 * the one specified in the path, (3) we can't try to do
+		 * a case-insensitive search to match the right one in (2),
+		 * because the underlying filesystem may do things like
+		 * decompose composed characters.  For most cases, doing
+		 * nothing is the right thing when useattrs == 0, so we punt
+		 * for now.
+		 */
 	}
 
 	/*
Commit	Line	Data
1f2f436a A	1	--- realpath.c.orig 2010-06-24 17:32:55.000000000 -0700
1f2f436a A	2	+++ realpath.c 2010-06-25 13:46:50.000000000 -0700
34e8f829	3	@@ -35,13 +35,41 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/
3d9156a7 A	4	#include "namespace.h"
	5	#include <sys/param.h>
	6	#include <sys/stat.h>
	7	+#include <sys/mount.h>
	8
	9	#include <errno.h>
59e0d9fe A	10	#include <stdlib.h>
	11	#include <string.h>
	12	#include <unistd.h>
	13	+#include <sys/attr.h>
	14	+#include <sys/vnode.h>
	15	#include "un-namespace.h"
	16
	17	+struct attrs {
	18	+ u_int32_t len;
	19	+ attrreference_t name;
3d9156a7	20	+ dev_t dev;
59e0d9fe	21	+ fsobj_type_t type;
3d9156a7	22	+ fsobj_id_t id;
59e0d9fe A	23	+ char buf[PATH_MAX];
	24	+};
	25	+
224c7076 A	26	+#ifndef BUILDING_VARIANT
224c7076 A	27	+__private_extern__ struct attrlist _rp_alist = {
59e0d9fe A	28	+ ATTR_BIT_MAP_COUNT,
59e0d9fe A	29	+ 0,
3d9156a7	30	+ ATTR_CMN_NAME \| ATTR_CMN_DEVID \| ATTR_CMN_OBJTYPE \| ATTR_CMN_OBJID,
59e0d9fe A	31	+ 0,
	32	+ 0,
	33	+ 0,
	34	+ 0,
	35	+};
224c7076 A	36	+#else /* BUILDING_VARIANT */
	37	+__private_extern__ struct attrlist _rp_alist;
	38	+#endif /* BUILDING_VARIANT */
	39	+
	40	+extern char * __private_getcwd(char *, size_t, int);
59e0d9fe A	41	+
	42	/*
	43	* char realpath(const char path, char resolved[PATH_MAX]);
	44	*
1f2f436a	45	@@ -50,36 +78,89 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/
34e8f829 A	46	* in which case the path which caused trouble is left in (resolved).
34e8f829 A	47	*/
59e0d9fe	48	char *
34e8f829 A	49	-realpath(const char *path, char resolved[PATH_MAX])
34e8f829 A	50	+realpath(const char *path, char inresolved[PATH_MAX])
59e0d9fe A	51	{
	52	+ struct attrs attrs;
	53	struct stat sb;
	54	char p, q, *s;
	55	- size_t left_len, resolved_len;
	56	+ size_t left_len, resolved_len, save_resolved_len;
	57	unsigned symlinks;
	58	- int serrno, slen;
	59	+ int serrno, slen, useattrs, islink;
	60	char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX];
3d9156a7 A	61	+ dev_t dev, lastdev;
	62	+ struct statfs sfs;
	63	+ static dev_t rootdev;
	64	+ static int rootdev_inited = 0;
	65	+ ino_t inode;
34e8f829	66	+ char *resolved;
59e0d9fe	67
224c7076 A	68	+ if (path == NULL) {
	69	+ errno = EINVAL;
	70	+ return (NULL);
	71	+ }
	72	+#if __DARWIN_UNIX03
	73	+ if (*path == 0) {
	74	+ errno = ENOENT;
	75	+ return (NULL);
	76	+ }
	77	+#endif /* __DARWIN_UNIX03 */
34e8f829 A	78	+ /*
34e8f829 A	79	+ * Extension to the standard; if inresolved == NULL, allocate memory
34e8f829 A	80	+ */
34e8f829 A	81	+ if (!inresolved) {
1f2f436a	82	+ if ((resolved = malloc(PATH_MAX)) == NULL) return (NULL);
34e8f829 A	83	+ } else {
	84	+ resolved = inresolved;
	85	+ }
3d9156a7 A	86	+ if (!rootdev_inited) {
3d9156a7 A	87	+ rootdev_inited = 1;
224c7076	88	+ if (stat("/", &sb) < 0) {
1f2f436a A	89	+error_return:
	90	+ if (!inresolved) {
	91	+ int e = errno;
	92	+ free(resolved);
	93	+ errno = e;
224c7076	94	+ }
1f2f436a A	95	+ return (NULL);
1f2f436a A	96	+ }
3d9156a7 A	97	+ rootdev = sb.st_dev;
3d9156a7 A	98	+ }
59e0d9fe	99	serrno = errno;
3d9156a7 A	100	symlinks = 0;
3d9156a7 A	101	if (path[0] == '/') {
224c7076 A	102	resolved[0] = '/';
	103	resolved[1] = '\0';
	104	- if (path[1] == '\0')
	105	+ if (path[1] == '\0') {
	106	return (resolved);
	107	+ }
	108	resolved_len = 1;
	109	left_len = strlcpy(left, path + 1, sizeof(left));
	110	} else {
	111	- if (getcwd(resolved, PATH_MAX) == NULL) {
	112	+#if !defined(VARIANT_DARWINEXTSN) && __DARWIN_UNIX03
	113	+ /* 4447159: don't use GETPATH, so this will fail if */
	114	+ /* if parent directories are not readable, as per POSIX */
	115	+ if (__private_getcwd(resolved, PATH_MAX, 0) == NULL)
	116	+#else /* VARIANT_DARWINEXTSN \|\| !__DARWIN_UNIX03 */
	117	+ if (__private_getcwd(resolved, PATH_MAX, 1) == NULL)
	118	+#endif /* !VARIANT_DARWINEXTSN && __DARWIN_UNIX03 */
	119	+ {
	120	strlcpy(resolved, ".", PATH_MAX);
1f2f436a A	121	- return (NULL);
1f2f436a A	122	+ goto error_return;
224c7076	123	}
1f2f436a A	124	resolved_len = strlen(resolved);
	125	left_len = strlcpy(left, path, sizeof(left));
	126	}
	127	if (left_len >= sizeof(left) \|\| resolved_len >= PATH_MAX) {
3d9156a7	128	errno = ENAMETOOLONG;
1f2f436a A	129	- return (NULL);
1f2f436a A	130	+ goto error_return;
3d9156a7 A	131	}
3d9156a7 A	132	+ if (resolved_len > 1) {
224c7076	133	+ if (stat(resolved, &sb) < 0) {
1f2f436a	134	+ goto error_return;
224c7076	135	+ }
3d9156a7 A	136	+ lastdev = sb.st_dev;
	137	+ } else
	138	+ lastdev = rootdev;
	139
	140	/*
	141	* Iterate over path components in `left'.
1f2f436a A	142	@@ -93,7 +174,7 @@ realpath(const char *path, char resolved
	143	s = p ? p : left + left_len;
	144	if (s - left >= sizeof(next_token)) {
	145	errno = ENAMETOOLONG;
	146	- return (NULL);
	147	+ goto error_return;
	148	}
	149	memcpy(next_token, left, s - left);
	150	next_token[s - left] = '\0';
	151	@@ -103,7 +184,7 @@ realpath(const char *path, char resolved
	152	if (resolved[resolved_len - 1] != '/') {
	153	if (resolved_len + 1 >= PATH_MAX) {
	154	errno = ENAMETOOLONG;
	155	- return (NULL);
	156	+ goto error_return;
	157	}
	158	resolved[resolved_len++] = '/';
	159	resolved[resolved_len] = '\0';
	160	@@ -127,6 +208,13 @@ realpath(const char *path, char resolved
59e0d9fe A	161	}
	162
	163	/*
	164	+ * Save resolved_len, so that we can later null out
	165	+ * the the appended next_token, and replace with the
	166	+ * real name (matters on case-insensitive filesystems).
	167	+ */
	168	+ save_resolved_len = resolved_len;
	169	+
	170	+ /*
	171	* Append the next path component and lstat() it. If
	172	* lstat() fails we still can return successfully if
	173	* there are no more path components left.
1f2f436a A	174	@@ -134,27 +222,89 @@ realpath(const char *path, char resolved
	175	resolved_len = strlcat(resolved, next_token, PATH_MAX);
	176	if (resolved_len >= PATH_MAX) {
59e0d9fe	177	errno = ENAMETOOLONG;
1f2f436a A	178	- return (NULL);
1f2f436a A	179	+ goto error_return;
59e0d9fe A	180	}
59e0d9fe A	181	- if (lstat(resolved, &sb) != 0) {
224c7076	182	+ if (getattrlist(resolved, &_rp_alist, &attrs, sizeof(attrs), FSOPT_NOFOLLOW) == 0) {
59e0d9fe A	183	+ useattrs = 1;
59e0d9fe A	184	+ islink = (attrs.type == VLNK);
3d9156a7 A	185	+ dev = attrs.dev;
3d9156a7 A	186	+ inode = attrs.id.fid_objno;
224c7076	187	+ } else if (errno == ENOTSUP \|\| errno == EINVAL) {
3d9156a7	188	+ if ((useattrs = lstat(resolved, &sb)) == 0) {
59e0d9fe	189	+ islink = S_ISLNK(sb.st_mode);
3d9156a7 A	190	+ dev = sb.st_dev;
	191	+ inode = sb.st_ino;
	192	+ }
59e0d9fe A	193	+ } else
	194	+ useattrs = -1;
	195	+ if (useattrs < 0) {
224c7076	196	+#if !__DARWIN_UNIX03
59e0d9fe A	197	if (errno == ENOENT && p == NULL) {
	198	errno = serrno;
	199	return (resolved);
	200	}
1f2f436a	201	- return (NULL);
224c7076	202	+#endif /* !__DARWIN_UNIX03 */
1f2f436a	203	+ goto error_return;
59e0d9fe A	204	}
59e0d9fe A	205	- if (S_ISLNK(sb.st_mode)) {
3d9156a7 A	206	+ if (dev != lastdev) {
	207	+ /*
	208	+ * We have crossed a mountpoint. For volumes like UDF
	209	+ * the getattrlist name may not match the actual
	210	+ * mountpoint, so we just copy the mountpoint directly.
	211	+ * (3703138). However, the mountpoint may not be
	212	+ * accessible, as when chroot-ed, so check first.
	213	+ * There may be a file on the chroot-ed volume with
	214	+ * the same name as the mountpoint, so compare device
	215	+ * and inode numbers.
	216	+ */
	217	+ lastdev = dev;
	218	+ if (statfs(resolved, &sfs) == 0 && lstat(sfs.f_mntonname, &sb) == 0 && dev == sb.st_dev && inode == sb.st_ino) {
	219	+ /*
	220	+ * However, it's possible that the mountpoint
	221	+ * path matches, even though it isn't the real
	222	+ * path in the chroot-ed environment, so check
	223	+ * that each component of the mountpoint
	224	+ * is a directory (and not a symlink)
	225	+ */
34e8f829	226	+ char temp[sizeof(sfs.f_mntonname)];
3d9156a7 A	227	+ char *cp;
	228	+ int ok = 1;
	229	+
	230	+ strcpy(temp, sfs.f_mntonname);
	231	+ for(;;) {
	232	+ if ((cp = strrchr(temp, '/')) == NULL) {
	233	+ ok = 0;
	234	+ break;
	235	+ }
	236	+ if (cp <= temp)
	237	+ break;
	238	+ *cp = 0;
	239	+ if (lstat(temp, &sb) < 0 \|\| (sb.st_mode & S_IFMT) != S_IFDIR) {
	240	+ ok = 0;
	241	+ break;
	242	+ }
	243	+ }
	244	+ if (ok) {
	245	+ resolved_len = strlcpy(resolved, sfs.f_mntonname, PATH_MAX);
	246	+ continue;
	247	+ }
	248	+ }
	249	+ /* if we fail, use the other methods. */
	250	+ }
59e0d9fe A	251	+ if (islink) {
	252	if (symlinks++ > MAXSYMLINKS) {
	253	errno = ELOOP;
1f2f436a A	254	- return (NULL);
1f2f436a A	255	+ goto error_return;
224c7076 A	256	}
	257	slen = readlink(resolved, symlink, sizeof(symlink) - 1);
	258	- if (slen < 0)
1f2f436a	259	- return (NULL);
224c7076	260	+ if (slen < 0) {
1f2f436a	261	+ goto error_return;
224c7076 A	262	+ }
224c7076 A	263	symlink[slen] = '\0';
3d9156a7 A	264	if (symlink[0] == '/') {
	265	resolved[1] = 0;
	266	resolved_len = 1;
	267	+ lastdev = rootdev;
	268	} else if (resolved_len > 1) {
	269	/* Strip the last path component. */
	270	resolved[resolved_len - 1] = '\0';
1f2f436a A	271	@@ -172,7 +322,7 @@ realpath(const char *path, char resolved
	272	if (symlink[slen - 1] != '/') {
	273	if (slen + 1 >= sizeof(symlink)) {
	274	errno = ENAMETOOLONG;
	275	- return (NULL);
	276	+ goto error_return;
	277	}
	278	symlink[slen] = '/';
	279	symlink[slen + 1] = 0;
	280	@@ -180,11 +330,34 @@ realpath(const char *path, char resolved
	281	left_len = strlcat(symlink, left, sizeof(left));
	282	if (left_len >= sizeof(left)) {
	283	errno = ENAMETOOLONG;
	284	- return (NULL);
	285	+ goto error_return;
59e0d9fe A	286	}
	287	}
	288	left_len = strlcpy(left, symlink, sizeof(left));
	289	+ } else if (useattrs) {
	290	+ /*
	291	+ * attrs already has the real name.
	292	+ */
	293	+
	294	+ resolved[save_resolved_len] = '\0';
	295	+ resolved_len = strlcat(resolved, (const char *)&attrs.name + attrs.name.attr_dataoffset, PATH_MAX);
	296	+ if (resolved_len >= PATH_MAX) {
	297	+ errno = ENAMETOOLONG;
1f2f436a	298	+ goto error_return;
59e0d9fe A	299	+ }
	300	}
	301	+ /*
	302	+ * For the case of useattrs == 0, we could scan the directory
	303	+ * and try to match the inode. There are many problems with
	304	+ * this: (1) the directory may not be readable, (2) for multiple
	305	+ * hard links, we would find the first, but not necessarily
	306	+ * the one specified in the path, (3) we can't try to do
	307	+ * a case-insensitive search to match the right one in (2),
	308	+ * because the underlying filesystem may do things like
	309	+ * decompose composed characters. For most cases, doing
	310	+ * nothing is the right thing when useattrs == 0, so we punt
	311	+ * for now.
	312	+ */
	313	}
	314
	315	/*