From 5703615d774ed2e6395edc757ab6f8ddb78261ef Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Fri, 12 Jun 2026 23:50:03 +0200
Subject: [PATCH] telnet.c rename to sockerr

---
 lib/telnet.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/lib/telnet.c b/lib/telnet.c
index 5d9bc05039..720663c44d 100644
--- a/lib/telnet.c
+++ b/lib/telnet.c
@@ -240,8 +240,8 @@ static void send_negotiation(struct Curl_easy *data, int cmd, int option)
 
   bytes_written = swrite(conn->sock[FIRSTSOCKET], buf, 3);
   if(bytes_written < 0) {
-    int err = SOCKERRNO;
-    failf(data, "Sending data failed (%d)", err);
+    int sockerr = SOCKERRNO;
+    failf(data, "Sending data failed (%d)", sockerr);
   }
 
   printoption(data, "SENT", cmd, option);
@@ -680,7 +680,7 @@ static void sendsuboption(struct Curl_easy *data,
                           struct TELNET *tn, int option)
 {
   ssize_t bytes_written;
-  int err;
+  int sockerr;
   unsigned short x, y;
   const unsigned char *uc1, *uc2;
   struct connectdata *conn = data->conn;
@@ -714,8 +714,8 @@ static void sendsuboption(struct Curl_easy *data,
     /* we send the header of the suboption... */
     bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer, 3);
     if(bytes_written < 0) {
-      err = SOCKERRNO;
-      failf(data, "Sending data failed (%d)", err);
+      sockerr = SOCKERRNO;
+      failf(data, "Sending data failed (%d)", sockerr);
     }
     /* ... then the window size with the send_telnet_data() function
        to deal with 0xFF cases ... */
@@ -723,8 +723,8 @@ static void sendsuboption(struct Curl_easy *data,
     /* ... and the footer */
     bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer + 7, 2);
     if(bytes_written < 0) {
-      err = SOCKERRNO;
-      failf(data, "Sending data failed (%d)", err);
+      sockerr = SOCKERRNO;
+      failf(data, "Sending data failed (%d)", sockerr);
     }
     break;
   }
@@ -987,7 +987,7 @@ static CURLcode suboption(struct Curl_easy *data, struct TELNET *tn)
   unsigned char temp[2048];
   ssize_t bytes_written;
   size_t len;
-  int err;
+  int sockerr;
   struct connectdata *conn = data->conn;
 
   if(!CURL_SB_LEN(tn)) /* ignore empty suboption */
@@ -1010,8 +1010,8 @@ static CURLcode suboption(struct Curl_easy *data, struct TELNET *tn)
     bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
 
     if(bytes_written < 0) {
-      err = SOCKERRNO;
-      failf(data, "Sending data failed (%d)", err);
+      sockerr = SOCKERRNO;
+      failf(data, "Sending data failed (%d)", sockerr);
       return CURLE_SEND_ERROR;
     }
     printsub(data, '>', &temp[2], len-2);
@@ -1029,8 +1029,8 @@ static CURLcode suboption(struct Curl_easy *data, struct TELNET *tn)
                          CURL_SE);
     bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
     if(bytes_written < 0) {
-      err = SOCKERRNO;
-      failf(data, "Sending data failed (%d)", err);
+      sockerr = SOCKERRNO;
+      failf(data, "Sending data failed (%d)", sockerr);
       return CURLE_SEND_ERROR;
     }
     printsub(data, '>', &temp[2], len - 2);
@@ -1062,8 +1062,8 @@ static CURLcode suboption(struct Curl_easy *data, struct TELNET *tn)
     len += 2;
     bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
     if(bytes_written < 0) {
-      err = SOCKERRNO;
-      failf(data, "Sending data failed (%d)", err);
+      sockerr = SOCKERRNO;
+      failf(data, "Sending data failed (%d)", sockerr);
     }
     printsub(data, '>', &temp[2], len - 2);
     break;
@@ -1247,7 +1247,7 @@ static CURLcode telnet_do(struct Curl_easy *data, bool *done)
   DWORD obj_count;
   DWORD wait_timeout;
   DWORD readfile_read;
-  int err;
+  int sockerr;
 #else
   timediff_t interval_ms;
   struct pollfd pfd[2];
@@ -1385,9 +1385,9 @@ static CURLcode telnet_do(struct Curl_easy *data, bool *done)
     case WAIT_OBJECT_0: {
       events.lNetworkEvents = 0;
       if(WSAEnumNetworkEvents(sockfd, event_handle, &events) != 0) {
-        err = SOCKERRNO;
-        if(err != SOCKEINPROGRESS) {
-          infof(data, "WSAEnumNetworkEvents failed (%d)", err);
+        sockerr = SOCKERRNO;
+        if(sockerr != SOCKEINPROGRESS) {
+          infof(data, "WSAEnumNetworkEvents failed (%d)", sockerr);
           keepon = FALSE;
           result = CURLE_READ_ERROR;
         }