[PATCH v4 1/4] xen-livepatch: fix parameter name parsing

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

It's incorrect to restrict strncmp to the length of the command line input
parameter, as then a user passing a rune like:

% xen-livepatch up foo.livepatch

Would match against the "upload" command, because the string comparison has
been truncated to the length of the input argument.  Use strcmp instead which
doesn't truncate.  Otherwise in order to keep using strncmp we would need to
also check strings are of the same length before doing the comparison.

Fixes: 05bb8afedede ('xen-xsplice: Tool to manipulate xsplice payloads')
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Changes since v3:
 - Use strcmp.

Changes since v2:
 - New in this version.
---
 tools/misc/xen-livepatch.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/misc/xen-livepatch.c b/tools/misc/xen-livepatch.c
index 5bf9d9a32b65..2c4f69e596fa 100644
--- a/tools/misc/xen-livepatch.c
+++ b/tools/misc/xen-livepatch.c
@@ -572,13 +572,13 @@ int main(int argc, char *argv[])
         return 0;
     }
     for ( i = 0; i < ARRAY_SIZE(main_options); i++ )
-        if (!strncmp(main_options[i].name, argv[1], strlen(argv[1])))
+        if (!strcmp(main_options[i].name, argv[1]))
             break;
 
     if ( i == ARRAY_SIZE(main_options) )
     {
         for ( j = 0; j < ARRAY_SIZE(action_options); j++ )
-            if (!strncmp(action_options[j].name, argv[1], strlen(argv[1])))
+            if (!strcmp(action_options[j].name, argv[1]))
                 break;
 
         if ( j == ARRAY_SIZE(action_options) )
-- 
2.44.0