sh: Prepend "$0: " to error messages if there is no command name.

2 files changed, 4 insertions, 0 deletions

diff --git a/bin/sh/error.c b/bin/sh/error.c
index c76a9dc..96a0092 100644
--- a/bin/sh/error.c
+++ b/bin/sh/error.c
@@ -139,6 +139,8 @@ vwarning(const char *msg, va_list ap)
 {
 	if (commandname)
 		outfmt(out2, "%s: ", commandname);
+	else if (arg0)
+		outfmt(out2, "%s: ", arg0);
 	doformat(out2, msg, ap);
 	out2fmt_flush("\n");
 }
diff --git a/bin/sh/parser.c b/bin/sh/parser.c
index 7fae29e..0048314 100644
--- a/bin/sh/parser.c
+++ b/bin/sh/parser.c
@@ -1879,6 +1879,8 @@ synerror(const char *msg)
 {
 	if (commandname)
 		outfmt(out2, "%s: %d: ", commandname, startlinno);
+	else if (arg0)
+		outfmt(out2, "%s: ", arg0);
 	outfmt(out2, "Syntax error: %s\n", msg);
 	error((char *)NULL);
 }