From d4b2a5603d628ed00a764cb526df02e3a382a0c1 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Mon, 19 Feb 2024 03:31:04 +0000
Subject: slbt_util_real_path(): rewrite as a wrapper around an internal
 slbt_realpath().

---
 src/util/slbt_realpath.c | 88 ++----------------------------------------------
 1 file changed, 2 insertions(+), 86 deletions(-)

(limited to 'src/util')

diff --git a/src/util/slbt_realpath.c b/src/util/slbt_realpath.c
index 9e97427..a21a986 100644
--- a/src/util/slbt_realpath.c
+++ b/src/util/slbt_realpath.c
@@ -4,31 +4,7 @@
 /*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
 /*******************************************************************/
 
-#include <fcntl.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <slibtool/slibtool.h>
-
-#include "slibtool_driver_impl.h"
-#include "slibtool_readlink_impl.h"
-
-#ifdef HAVE_SYS_SYSCALL_H
-#include <sys/syscall.h>
-#endif
-
-#ifdef _MIDIPIX_ABI
-#include <sys/fs.h>
-#endif
-
-#ifndef ENOTSUP
-#define ENOTSUP EOPNOTSUPP
-#endif
-
-#ifdef SYS___realpathat
-extern long syscall(int, ...);
-#endif
+#include "slibtool_realpath_impl.h"
 
 int slbt_util_real_path(
 	int             fdat,
@@ -37,65 +13,5 @@ int slbt_util_real_path(
 	char *          buf,
 	size_t          buflen)
 {
-	int             ret;
-	int             fd;
-	int             fdproc;
-	struct stat     st;
-	struct stat     stproc;
-	char    procfspath[36];
-
-	/* common validation */
-	if (!buf || (options & O_CREAT)) {
-		errno = EINVAL;
-		return -1;
-	}
-
-	/* framework-based wrapper */
-#ifdef _MIDIPIX_ABI
-	return __fs_rpath(fdat,path,options,buf,buflen);
-#endif
-
-#ifdef SYS___realpathat
-	return syscall(SYS___realpathat,fdat,path,buf,buflen,0);
-#endif
-
-	/* buflen */
-	if (buflen < PATH_MAX) {
-		errno = ENOBUFS;
-		return -1;
-	}
-
-	/* AT_FDCWD */
-	if (fdat == AT_FDCWD) {
-		return realpath(path,buf) ? 0 : -1;
-	}
-
-	/* /proc/self/fd */
-	if ((fd = openat(fdat,path,options,0)) < 0)
-		return -1;
-
-	sprintf(procfspath,"/proc/self/fd/%d",fd);
-
-	if (slbt_readlinkat(fdat,procfspath,buf,buflen)) {
-		close(fd);
-		return -1;
-	}
-
-	if ((fdproc = openat(AT_FDCWD,buf,options|O_NOFOLLOW,0)) < 0) {
-		close(fd);
-		errno = ELOOP;
-		return -1;
-	}
-
-	ret = fstat(fd,&st) || fstat(fdproc,&stproc);
-
-	close(fd);
-	close(fdproc);
-
-	if (ret || (st.st_dev != stproc.st_dev) || (st.st_ino != stproc.st_ino)) {
-		errno = ENOTSUP;
-		return -1;
-	}
-
-	return 0;
+	return slbt_realpath(fdat,path,options,buf,buflen);
 }
-- 
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