1 files changed, 70 insertions, 0 deletions
diff --git a/guts/fchmodat.c b/guts/fchmodat.c
new file mode 100644
index 0000000..36bd4d1
--- /dev/null
+++ b/guts/fchmodat.c
@@ -0,0 +1,70 @@
+/* 
+ * static int
+ * wrap_fchmodat(int dirfd, const char *path, mode_t mode, int flags) {
+ *	int rc = -1;
+ */
+ 	pseudo_msg_t *msg;
+	struct stat64 buf;
+	int save_errno;
+
+#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
+	if (dirfd != AT_FDCWD) {
+		errno = ENOSYS;
+		return -1;
+	}
+	if (flags & AT_SYMLINK_NOFOLLOW) {
+		rc = real___lxstat64(_STAT_VER, path, &buf);
+	} else {
+		rc = real___xstat64(_STAT_VER, path, &buf);
+	}
+#else
+	rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, flags);
+#endif
+	if (rc == -1) {
+		return rc;
+	}
+	if (S_ISLNK(buf.st_mode)) {
+		/* we don't really support chmod of a symlink */
+		errno = ENOSYS;
+		return -1;
+	}
+	save_errno = errno;
+
+	/* purely for debugging purposes:  check whether file
+	 * is already in database.
+	 */
+	msg = pseudo_client_op(OP_STAT, flags, -1, -1, path, &buf);
+	if (!msg || msg->result != RESULT_SUCCEED) {
+		pseudo_debug(2, "chmodat to 0%o on %d/%s, ino %llu, new file.\n",
+			mode, dirfd, path, (unsigned long long) buf.st_ino);
+
+	}
+
+	/* user bits added so "root" can always access files. */
+#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
+	/* note:  if path was a symlink, and AT_NOFOLLOW_SYMLINKS was
+	 * specified, we already bailed previously. */
+	real_chmod(path, PSEUDO_FS_MODE(mode));
+#else
+	real_fchmodat(dirfd, path, PSEUDO_FS_MODE(mode), flags);
+#endif
+	/* we ignore a failure from underlying fchmod, because pseudo
+	 * may believe you are permitted to change modes that the filesystem
+	 * doesn't.
+	 */
+
+	buf.st_mode = (buf.st_mode & ~07777) | (mode & 07777);
+	msg = pseudo_client_op(OP_CHMOD, flags, -1, dirfd, path, &buf);
+	if (!msg) {
+		errno = ENOSYS;
+		rc = -1;
+	} else if (msg->result != RESULT_SUCCEED) {
+		errno = msg->xerrno;
+		rc = -1;
+	} else {
+		rc = 0;
+	}
+
+/*	return rc;
+ * }
+ */