tst-fmemopen: Do not write test file in $srcdir.

1 files changed, 12 insertions, 6 deletions

diff --git a/stdio-common/tst-fmemopen.c b/stdio-common/tst-fmemopen.c
index 3c06c45..8aa047e 100644
--- a/stdio-common/tst-fmemopen.c
+++ b/stdio-common/tst-fmemopen.c
@@ -8,11 +8,10 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#define TEST_FILE "test-1"
-
 int
-main (void)
+main (int argc, char **argv)
 {
+  const char *test_file;
   const char blah[] = "BLAH";
   FILE *fp;
   char *mmap_data;
@@ -20,8 +19,14 @@ main (void)
   struct stat fs;
   const char *cp;
 
+  /* Construct the test file name based on ARGV[0], which will be
+     an absolute file name in the build directory.  Don't touch the
+     source directory, which might be read-only.  */
+  if (argc != 1 || asprintf (&test_file, "%s.test", argv[0]) < 0)
+    exit (99);
+
   /* setup the physical file, and use it */
-  if ((fp = fopen (TEST_FILE, "w+")) == NULL)
+  if ((fp = fopen (test_file, "w+")) == NULL)
     exit (1);
   if (fwrite (blah, 1, strlen (blah), fp) != strlen (blah))
     exit (2);
@@ -56,7 +61,7 @@ main (void)
   fclose (fp);
 
   /* Now, mmap the file into a buffer, and do that too */
-  if ((fd = open (TEST_FILE, O_RDONLY)) == -1)
+  if ((fd = open (test_file, O_RDONLY)) == -1)
     exit (3);
   if (fstat (fd, &fs) == -1)
     exit (4);
@@ -105,7 +110,8 @@ main (void)
 
   munmap (mmap_data, fs.st_size);
 
-  unlink (TEST_FILE);
+  unlink (test_file);
+  free (test_file);
 
   return 0;
 }