[monitoring-plugins] check_tcp: Fixes an error with using the wrong ...

[RincewindsHat]

 Module: monitoring-plugins
 Branch: master
 Commit: eead88edda047843b911afd7b63e7decfee306ce
 Author: RincewindsHat <12514511+rincewinds...@users.noreply.github.com>
   Date: Thu Oct 19 13:46:15 2023 +0200
    URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=eead88e

check_tcp: Fixes an error with using the wrong type for a variable

---

 plugins/check_tcp.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index 054f1a3..01dd35e 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -70,7 +70,7 @@ static char *server_send = NULL;
 static char *server_quit = NULL;
 static char **server_expect;
 static size_t server_expect_count = 0;
-static size_t maxbytes = 0;
+static ssize_t maxbytes = 0;
 static char **warn_codes = NULL;
 static size_t warn_codes_count = 0;
 static char **crit_codes = NULL;
@@ -105,7 +105,6 @@ main (int argc, char **argv)
        char *status = NULL;
        struct timeval tv;
        struct timeval timeout;
-       size_t len;
        int match = -1;
        fd_set rfds;
 
@@ -120,10 +119,10 @@ main (int argc, char **argv)
        if(progname != NULL) progname++;
        else progname = argv[0];
 
-       len = strlen(progname);
-       if(len > 6 && !memcmp(progname, "check_", 6)) {
+       size_t prog_name_len = strlen(progname);
+       if(prog_name_len > 6 && !memcmp(progname, "check_", 6)) {
                SERVICE = strdup(progname + 6);
-               for(size_t i = 0; i < len - 6; i++)
+               for(size_t i = 0; i < prog_name_len - 6; i++)
                        SERVICE[i] = toupper(SERVICE[i]);
        }
 
@@ -279,11 +278,12 @@ main (int argc, char **argv)
        }
 
        /* if(len) later on, we know we have a non-NULL response */
-       len = 0;
+       ssize_t len = 0;
+
        if (server_expect_count) {
+               ssize_t received = 0;
 
                /* watch for the expect string */
-               size_t received = 0;
                while ((received = my_recv(buffer, sizeof(buffer))) > 0) {
                        status = realloc(status, len + received + 1);
                        memcpy(&status[len], buffer, received);
@@ -307,6 +307,7 @@ main (int argc, char **argv)
                        if(select(sd + 1, &rfds, NULL, NULL, &timeout) <= 0)
                                break;
                }
+
                if (match == NP_MATCH_RETRY)
                        match = NP_MATCH_FAILURE;