[PATCH] elf: Fix ambiguous error message for --f in sotruss [BZ #25257]

[Avinal Kumar]

The sotruss utility printed an incomplete error message when the
ambiguous option --f was used.  The message did not list the possible
matching options, making it unclear how to resolve the ambiguity.

This commit corrects the error message to report all valid alternatives.

Example after this change:

$ sotruss --f /bin/true
--f: option is ambiguous; possibilities: '--from' '--follow'
Try `sotruss --help' or `sotruss --usage' for more information.

This fixes BZ #25257.

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>
Suggested-by: Carlos Santos <casantos@redhat.com>
---
Please refer: https://sourceware.org/bugzilla/show_bug.cgi?id=25257#c0

 elf/sotruss.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/elf/sotruss.sh b/elf/sotruss.sh
index 8944645df9..689b3f48e0 100755
--- a/elf/sotruss.sh
+++ b/elf/sotruss.sh
@@ -58,7 +58,8 @@ do_missing_arg() {
 }
 
 do_ambiguous() {
-  printf >&2 $"%s: option is ambiguous; possibilities:"
+  printf >&2 $"%s: option is ambiguous; possibilities:" "$1"
+  shift
   while test $# -gt 0; do
     printf >&2 " '%s'" $1
     shift
@@ -124,7 +125,7 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     SOTRUSS_EXIT=1
     ;;
   --f)
-    do_ambiguous '--from' '--follow'
+    do_ambiguous '--f' '--from' '--follow'
     ;;
   --)
     shift
-- 
2.52.0