Attachment 2669 Details for Bug 2428 – Check if realpath works with non-existent files.

[patch] Check if realpath works with non-existent files.

openssh-realpath-ENOENT.patch (text/plain), 1.22 KB, created by Darren Tucker on 2015-07-15 11:50:47 AEST

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Creator: Darren Tucker

Created: 2015-07-15 11:50:47 AEST

Size: 1.22 KB

patch

obsolete

>diff --git a/configure.ac b/configure.ac
>index bb0095f..4cc4015 100644
>--- a/configure.ac
>+++ b/configure.ac
>@@ -1674,7 +1674,6 @@ AC_CHECK_FUNCS([ \
> 	pstat \
> 	readpassphrase \
> 	reallocarray \
>-	realpath \
> 	recvmsg \
> 	rresvport_af \
> 	sendmsg \
>@@ -1891,6 +1890,32 @@ AC_CHECK_FUNCS([setresgid], [
> 	)
> ])
> 
>+AC_CHECK_FUNCS([realpath], [
>+	dnl the sftp v3 spec says SSH_FXP_REALPATH will "canonicalize any given
>+	dnl path name", however some implementations of realpath (and some
>+	dnl versions of the POSIX spec) do not work on non-existent files,
>+	dnl so we use the OpenBSD implementation on those platforms.
>+	AC_MSG_CHECKING([if realpath works with non-existent files])
>+	AC_RUN_IFELSE(
>+		[AC_LANG_PROGRAM([[
>+#include <limits.h>
>+#include <stdlib.h>
>+#include <errno.h>
>+		]], [[
>+		char buf[PATH_MAX];
>+		if (realpath("/opensshnonexistentfilename1234", buf) == NULL)
>+			if (errno == ENOENT)
>+				exit(1);
>+		exit(0);
>+		]])],
>+		[AC_MSG_RESULT([yes])],
>+		[AC_DEFINE([BROKEN_REALPATH], [1],
>+			[realpath does not work with nonexistent files])
>+		 AC_MSG_RESULT([no])],
>+		[AC_MSG_WARN([cross compiling: assuming working])]
>+	)
>+])
>+
> dnl    Checks for time functions
> AC_CHECK_FUNCS([gettimeofday time])
> dnl    Checks for utmp functions

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