Preserve errno across free().

tglsfdc · tglsfdc · commit 2209c0f8618b · 2014-04-04T19:07:37.000-04:00
Dept. of second thoughts: free() isn't guaranteed not to change errno.
Make sure we report the right error if getcwd() fails.
diff --git a/src/port/path.c b/src/port/path.c
@@ -608,7 +608,10 @@ make_absolute_path(const char *path)
 			}
 			else
 			{
+				int			save_errno = errno;
+
 				free(buf);
+				errno = save_errno;
 #ifndef FRONTEND
 				elog(ERROR, "could not get current working directory: %m");
 #else

Original file line number	Diff line number	Diff line change
`@@ -608,7 +608,10 @@ make_absolute_path(const char *path)`
`608`	`608`	`}`
`609`	`609`	`else`
`610`	`610`	`{`
	`611`	`+ int save_errno = errno;`
	`612`	`+`
`611`	`613`	`free(buf);`
	`614`	`+ errno = save_errno;`
`612`	`615`	`#ifndef FRONTEND`
`613`	`616`	`elog(ERROR, "could not get current working directory: %m");`
`614`	`617`	`#else`