[PATCH] Cleaner error messages

[Olivier Duclos]

Hi,

This is a small cosmetic patch which fixes something that annoyed me for a long 
time: the repetition of the script name in error messages.

Example:

  $ cat test.sh
  #!/bin/sh
  echo ${x:?}

  $ dash test.sh
  /home/odc/test.sh: 2: /home/odc/test.sh: x: parameter not set or null

With the patch:

  $ dash test.sh
  /home/odc/test.sh: 2: x: parameter not set or null

This is the same behavior as bash.

diff --git a/src/error.c b/src/error.c
index 728ff88..ed35256 100644
--- a/src/error.c
+++ b/src/error.c
@@ -46,6 +46,7 @@
 #include "jobs.h"
 #include "shell.h"
 #include "main.h"
+#include "mystring.h"
 #include "options.h"
 #include "output.h"
 #include "error.h"
@@ -124,7 +125,7 @@ exvwarning2(const char *msg, va_list ap)
 
        errs = out2;
        name = arg0 ? arg0 : "sh";
-       if (!commandname)
+       if (!commandname || equal(commandname, name))
                fmt = "%s: %d: ";
        else
                fmt = "%s: %d: %s: ";

-- 
  Olivier Duclos