From: Max Kellermann <max.kellerm...@gmail.com>
Signed-off-by: Max Kellermann <max.kellerm...@gmail.com>
---
ports/linux/guts/faccessat.c | 33 +++++++++++++++++++++++++++++++++
ports/linux/wrapfuncs.in | 1 +
2 files changed, 34 insertions(+)
create mode 100644 ports/linux/guts/faccessat.c
diff --git a/ports/linux/guts/faccessat.c b/ports/linux/guts/faccessat.c
new file mode 100644
index 0000000..64189fa
--- /dev/null
+++ b/ports/linux/guts/faccessat.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2019 Max Kellermann <max.kellerm...@gmail.com>
+ * guts/COPYRIGHT for information.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * static int
+ * wrap_faccessat(int dirfd, const char *path, int mode, int flags) {
+ * int rc = -1;
+ */
+ struct stat64 buf;
+
+ /* note: no attempt to handle the case where user isn't
+ * root.
+ */
+ rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, flags);
+ if (rc == -1)
+ return rc;
+
+ if (mode & X_OK) {
+ if (buf.st_mode & 0111) {
+ return 0;
+ } else {
+ errno = EPERM;
+ return -1;
+ }
+ } else {
+ return 0;
+ }
+
+/* return rc;
+ * }
+ */
diff --git a/ports/linux/wrapfuncs.in b/ports/linux/wrapfuncs.in
index a129eba..2a118fc 100644
--- a/ports/linux/wrapfuncs.in
+++ b/ports/linux/wrapfuncs.in
@@ -56,3 +56,4 @@ int getgrent_r(struct group *gbuf, char *buf, size_t buflen,
struct group **gbuf
int capset(cap_user_header_t hdrp, const cap_user_data_t datap); /*
real_func=pseudo_capset */
long syscall(long nr, ...); /* hand_wrapped=1 */
int renameat2(int olddirfd, const char *oldpath, int newdirfd, const char
*newpath, unsigned int flags); /* flags=AT_SYMLINK_NOFOLLOW */
+int faccessat(int dirfd, const char *path, int mode, int flags);
--
2.20.1
--
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