tests: fix warn unused result on asprintf calls

When enabling _FORTIFY_SOURCE, some functions now lead to warnings when
their result is not checked.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

argp/argp-test.c

@@ -25,6 +25,8 @@
 #include <string.h>
 #include <argp.h>
 
+#include <support/support.h>
+
 const char *argp_program_version = "argp-test 1.0";
 
 struct argp_option sub_options[] =
@@ -178,12 +180,12 @@ help_filter (int key, const char *text, void *input)
   if (key == ARGP_KEY_HELP_POST_DOC && text)
     {
       time_t now = time (0);
-      asprintf (&new_text, text, ctime (&now));
+      new_text = xasprintf (text, ctime (&now));
     }
   else if (key == 'f')
     /* Show the default for the --foonly option.  */
-    asprintf (&new_text, "%s (ZOT defaults to %x)",
+    new_text = xasprintf ("%s (ZOT defaults to %x)",
-	      text, params->foonly_default);
+		          text, params->foonly_default);
   else
     new_text = (char *)text;
 

posix/tst-execl2.c

@@ -18,12 +18,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");

posix/tst-execle2.c

@@ -18,12 +18,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");

posix/tst-execlp2.c

@@ -22,12 +22,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");
@@ -58,13 +54,8 @@ do_test (void)
       puts ("canonicalize_file_name failed");
       return 1;
     }
-  char *path;
+
-  asprintf (&path, "%s:../libio:../elf", bindir);
+  char *path = xasprintf ("%s:../libio:../elf", bindir);
-  if (path == NULL)
-    {
-      puts ("asprintf  failed");
-      return 1;
-    }
 
   setenv ("PATH", path, 1);
 

posix/tst-execv2.c

@@ -18,12 +18,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");

posix/tst-execve2.c

@@ -18,12 +18,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");

posix/tst-execvp2.c

@@ -25,12 +25,8 @@ prepare (int argc, char *argv[])
 {
   char *buf;
   int off;
-  asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
+
-  if (buf == NULL)
+  buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
-    {
-      puts ("asprintf  failed");
-      exit (1);
-    }
   if (system (buf) != 0)
     {
       puts ("system  failed");
@@ -61,13 +57,8 @@ do_test (void)
       puts ("canonicalize_file_name failed");
       return 1;
     }
-  char *path;
+
-  asprintf (&path, "%s:../libio:../elf", bindir);
+  char *path = xasprintf ("%s:../libio:../elf", bindir);
-  if (path == NULL)
-    {
-      puts ("asprintf  failed");
-      return 1;
-    }
 
   setenv ("PATH", path, 1);
 

stdio-common/bug5.c

@@ -7,6 +7,8 @@
 #include <stdlib.h>
 #include <unistd.h>
 
+#include <support/support.h>
+
 static char buf[8192];
 
 int
@@ -60,7 +62,7 @@ main (void)
      the perhaps incompatible new shared libraries.  */
   unsetenv ("LD_LIBRARY_PATH");
 
-  asprintf (&printbuf, "cmp %s %s", inname, outname);
+  printbuf = xasprintf ("cmp %s %s", inname, outname);
   result = system (printbuf);
   remove (inname);
   remove (outname);

stdio-common/test-fwrite.c

@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <support/support.h>
+
 static int
 do_test (void)
 {
@@ -57,7 +59,7 @@ do_test (void)
       return 1;
     }
 
-  asprintf (&line, "\
+  line = xasprintf ("\
 GDB is free software and you are welcome to distribute copies of it\n\
  under certain conditions; type \"show copying\" to see the conditions.\n\
 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\

stdio-common/tst-fseek.c

@@ -25,6 +25,7 @@
 #include <time.h>
 #include <sys/stat.h>
 
+#include <support/support.h>
 
 static int
 do_test (void)
@@ -44,9 +45,7 @@ do_test (void)
   if (tmpdir == NULL || tmpdir[0] == '\0')
     tmpdir = "/tmp";
 
-  asprintf (&fname, "%s/tst-fseek.XXXXXX", tmpdir);
+  fname = xasprintf ("%s/tst-fseek.XXXXXX", tmpdir);
-  if (fname == NULL)
-    error (EXIT_FAILURE, errno, "cannot generate name for temporary file");
 
   /* Create a temporary file.   */
   fd = mkstemp (fname);