From c81d169af088b6b90d850d7c0f5c5daae6cfc4ba Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Tue, 13 Apr 2021 18:15:38 +0000
Subject: library: replace all uses of [slbt_]readlink() with
 [slbt_]readlinkat().

---
 src/logic/slbt_exec_install.c   | 14 +++++++++-----
 src/logic/slbt_exec_link.c      |  7 ++++---
 src/logic/slbt_exec_uninstall.c | 10 +++++++---
 3 files changed, 20 insertions(+), 11 deletions(-)

(limited to 'src/logic')

diff --git a/src/logic/slbt_exec_install.c b/src/logic/slbt_exec_install.c
index 5adfd34..3429d91 100644
--- a/src/logic/slbt_exec_install.c
+++ b/src/logic/slbt_exec_install.c
@@ -115,6 +115,7 @@ static int slbt_exec_install_import_libraries(
 	char *				srcdso,
 	char *				dstdir)
 {
+	int	fdcwd;
 	char *	host;
 	char *	slash;
 	char *	dot;
@@ -127,6 +128,9 @@ static int slbt_exec_install_import_libraries(
 	char	minor  [128];
 	char	rev    [128];
 
+	/* fdcwd */
+	fdcwd = slbt_driver_fdcwd(dctx);
+
 	/* .libs/libfoo.so.x.y.z */
 	if ((size_t)snprintf(srcbuf,sizeof(srcbuf),"%s",
 			srcdso) >= sizeof(srcbuf))
@@ -184,7 +188,7 @@ static int slbt_exec_install_import_libraries(
 		return SLBT_BUFFER_ERROR(dctx);
 
 	/* libfoo.so.def.{flavor} */
-	if (slbt_readlink(hostlnk,hosttag,sizeof(hosttag)))
+	if (slbt_readlinkat(fdcwd,hostlnk,hosttag,sizeof(hosttag)))
 		return SLBT_SYSTEM_ERROR(dctx,hostlnk);
 
 	/* host/flabor */
@@ -399,7 +403,7 @@ static int slbt_exec_install_entry(
 		return SLBT_BUFFER_ERROR(dctx);
 
 	if (!fstatat(fdcwd,slnkname,&st,0)) {
-		if (slbt_readlink(slnkname,target,sizeof(target)) < 0)
+		if (slbt_readlinkat(fdcwd,slnkname,target,sizeof(target)) < 0)
 			return SLBT_SYSTEM_ERROR(dctx,slnkname);
 
 		if (strncmp(lasource,target,(slen = strlen(lasource))))
@@ -453,7 +457,7 @@ static int slbt_exec_install_entry(
 	/* libfoo.a installation */
 	if (!(dctx->cctx->drvflags & SLBT_DRIVER_DISABLE_STATIC))
 		farchive = true;
-	else if (slbt_symlink_is_a_placeholder(slnkname))
+	else if (slbt_symlink_is_a_placeholder(fdcwd,slnkname))
 		farchive = true;
 	else
 		farchive = false;
@@ -478,9 +482,9 @@ static int slbt_exec_install_entry(
 		base = slnkname;
 
 	/* source (build) symlink target */
-	if (slbt_readlink(slnkname,target,sizeof(target)) < 0) {
+	if (slbt_readlinkat(fdcwd,slnkname,target,sizeof(target)) < 0) {
 		/* -all-static? */
-		if (slbt_symlink_is_a_placeholder(slnkname))
+		if (slbt_symlink_is_a_placeholder(fdcwd,slnkname))
 			return 0;
 
 		/* -avoid-version? */
diff --git a/src/logic/slbt_exec_link.c b/src/logic/slbt_exec_link.c
index e5376b3..01a46bb 100644
--- a/src/logic/slbt_exec_link.c
+++ b/src/logic/slbt_exec_link.c
@@ -304,7 +304,7 @@ static int slbt_adjust_linker_argument(
 	if (fpic) {
 		sprintf(dot,"%s",dsosuffix);
 
-		if (slbt_symlink_is_a_placeholder(arg))
+		if (slbt_symlink_is_a_placeholder(fdcwd,arg))
 			sprintf(dot,"%s",arsuffix);
 		else if ((fdlib = openat(fdcwd,arg,O_RDONLY)) >= 0)
 			close(fdlib);
@@ -536,8 +536,9 @@ static int slbt_exec_link_adjust_argument_vector(
 			sprintf(rpathlnk,"%s.slibtool.rpath",*carg);
 
 			if (!fstatat(fdcwd,rpathlnk,&st,AT_SYMLINK_NOFOLLOW)) {
-				if (slbt_readlink(
-						rpathlnk,\
+				if (slbt_readlinkat(
+						fdcwd,
+						rpathlnk,
 						rpathdir,
 						sizeof(rpathdir)))
 					return slbt_exec_link_exit(
diff --git a/src/logic/slbt_exec_uninstall.c b/src/logic/slbt_exec_uninstall.c
index 9f2521c..2930c26 100644
--- a/src/logic/slbt_exec_uninstall.c
+++ b/src/logic/slbt_exec_uninstall.c
@@ -166,6 +166,7 @@ static int slbt_exec_uninstall_entry(
 	char **				parg,
 	uint32_t			flags)
 {
+	int		fdcwd;
 	const char *	dsosuffix;
 	char *		dot;
 	char		path [PATH_MAX];
@@ -177,6 +178,9 @@ static int slbt_exec_uninstall_entry(
 
 	*parg = (char *)entry->arg;
 
+	/* fdcwd */
+	fdcwd = slbt_driver_fdcwd(dctx);
+
 	/* remove explicit argument */
 	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
 		return SLBT_NESTED_ERROR(dctx);
@@ -200,7 +204,7 @@ static int slbt_exec_uninstall_entry(
 	/* .so symlink? */
 	strcpy(dot,dsosuffix);
 
-	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+	if (!(slbt_readlinkat(fdcwd,path,lpath,sizeof(lpath))))
 		if (slbt_exec_uninstall_versioned_library(
 				dctx,ectx,parg,
 				path,lpath,
@@ -210,7 +214,7 @@ static int slbt_exec_uninstall_entry(
 	/* .lib.a symlink? */
 	strcpy(dot,".lib.a");
 
-	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+	if (!(slbt_readlinkat(fdcwd,path,lpath,sizeof(lpath))))
 		if (slbt_exec_uninstall_versioned_library(
 				dctx,ectx,parg,
 				path,lpath,
@@ -220,7 +224,7 @@ static int slbt_exec_uninstall_entry(
 	/* .dll symlink? */
 	strcpy(dot,".dll");
 
-	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+	if (!(slbt_readlinkat(fdcwd,path,lpath,sizeof(lpath))))
 		if (slbt_exec_uninstall_versioned_library(
 				dctx,ectx,parg,
 				path,lpath,
-- 
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