libdpkg: Do not silently eat a standalone ‘-’ in the command-line parser

A single dash is commonly used to refer to standard input, and having
to use ‘--’ to stop the parser is very cumbersome. Besides, there's no
reason a standalone ‘-’ should be silently ignored.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/dpkg/options.c b/lib/dpkg/options.c
index 43d1fdb1d..3161dec8b 100644
--- a/lib/dpkg/options.c
+++ b/lib/dpkg/options.c
@@ -221,7 +221,7 @@ dpkg_options_parse(const char *const **argvp, const struct cmdinfo *cmdinfos,
   printforhelp = help_str;
 
   ++(*argvp);
-  while ((p= **argvp) && *p == '-') {
+  while ((p = **argvp) && p[0] == '-' && p[1] != '\0') {
     ++(*argvp);
     if (strcmp(p, "--") == 0)
       break;