From 8b52b950360cd7224f504f294997f3a9d7e18b91 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Mon, 16 Jan 2023 19:44:52 +1000
Subject: [PATCH libXpm] Use gzip -d instead of gunzip

GNU gunzip [1] is a shell script that exec's `gzip -d`. Even if we call
/usr/bin/gunzip with the correct built-in path, the actual gzip call
will use whichever gzip it finds first, making our patch pointless.

Fix this by explicitly calling gzip -d instead.

https://git.savannah.gnu.org/cgit/gzip.git/tree/gunzip.in
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
 README       | 2 +-
 configure.ac | 3 +--
 src/RdFToI.c | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/README b/README
index c7d6dbf..d4c7212 100644
--- a/README
+++ b/README
@@ -48,5 +48,5 @@ the first version found in the PATH used to run configure, and do not depend
 on the PATH environment variable set at runtime.
 
 To specify paths to be used for these commands instead of searching $PATH, pass
-the XPM_PATH_COMPRESS, XPM_PATH_UNCOMPRESS, XPM_PATH_GZIP, and XPM_PATH_GUNZIP
+the XPM_PATH_COMPRESS, XPM_PATH_UNCOMPRESS, and XPM_PATH_GZIP
 variables to the configure command.
diff --git a/configure.ac b/configure.ac
index c1da348..74d9856 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,7 +57,7 @@ AC_DEFINE_UNQUOTED([$1], ["$$1"], [Path to $2])
 ]) dnl End of AC_DEFUN([XPM_PATH_PROG]...
 
 # Optional feature: When a filename ending in .Z or .gz is requested,
-# open a pipe to a newly forked compress/uncompress/gzip/gunzip command to
+# open a pipe to a newly forked compress/uncompress/gzip command to
 # handle it.
 AC_MSG_CHECKING([whether to handle compressed pixmaps])
 case $host_os in
@@ -75,7 +75,6 @@ else
         XPM_PATH_PROG([XPM_PATH_COMPRESS], [compress])
         XPM_PATH_PROG([XPM_PATH_UNCOMPRESS], [uncompress])
         XPM_PATH_PROG([XPM_PATH_GZIP], [gzip])
-        XPM_PATH_PROG([XPM_PATH_GUNZIP], [gunzip])
         AC_CHECK_FUNCS([closefrom close_range], [break])
 fi
 
diff --git a/src/RdFToI.c b/src/RdFToI.c
index a91d337..141c485 100644
--- a/src/RdFToI.c
+++ b/src/RdFToI.c
@@ -251,7 +251,7 @@ OpenReadFile(
 	else if ( ext && !strcmp(ext, ".gz") )
 	{
 	    mdata->type = XPMPIPE;
-	    mdata->stream.file = xpmPipeThrough(fd, XPM_PATH_GUNZIP, "-qc", "r");
+	    mdata->stream.file = xpmPipeThrough(fd, XPM_PATH_GZIP, "-dqc", "r");
 	}
 	else
 #endif /* z-files */
-- 
2.39.0