examples: remove dead variable stores

Closes https://github.com/curl/curl/pull/3919

4 files changed, 34 insertions, 35 deletions

diff --git a/docs/examples/cacertinmem.c b/docs/examples/cacertinmem.c
index 11cc06bee..ea295d016 100644
--- a/docs/examples/cacertinmem.c
+++ b/docs/examples/cacertinmem.c
@@ -123,26 +123,26 @@ int main(void)
   CURL *ch;
   CURLcode rv;
 
-  rv = curl_global_init(CURL_GLOBAL_ALL);
+  curl_global_init(CURL_GLOBAL_ALL);
   ch = curl_easy_init();
-  rv = curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
-  rv = curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
-  rv = curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, *writefunction);
-  rv = curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, *writefunction);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
-  rv = curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
-  rv = curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
-  rv = curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
+  curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
+  curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
+  curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
+  curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
+  curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, *writefunction);
+  curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
+  curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, *writefunction);
+  curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
+  curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
+  curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
+  curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
 
   /* Turn off the default CA locations, otherwise libcurl will load CA
    * certificates from the locations that were detected/specified at
    * build-time
    */
-  rv = curl_easy_setopt(ch, CURLOPT_CAINFO, NULL);
-  rv = curl_easy_setopt(ch, CURLOPT_CAPATH, NULL);
+  curl_easy_setopt(ch, CURLOPT_CAINFO, NULL);
+  curl_easy_setopt(ch, CURLOPT_CAPATH, NULL);
 
   /* first try: retrieve page without ca certificates -> should fail
    * unless libcurl was built --with-ca-fallback enabled at build-time
@@ -162,13 +162,13 @@ int main(void)
    * handle. normally you would set the ssl ctx function before making
    * any transfers, and not use this option.
    */
-  rv = curl_easy_setopt(ch, CURLOPT_FRESH_CONNECT, 1L);
+  curl_easy_setopt(ch, CURLOPT_FRESH_CONNECT, 1L);
 
   /* second try: retrieve page using cacerts' certificate -> will succeed
    * load the certificate by installing a function doing the necessary
    * "modifications" to the SSL CONTEXT just before link init
    */
-  rv = curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
+  curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
   rv = curl_easy_perform(ch);
   if(rv == CURLE_OK)
     printf("*** transfer succeeded ***\n");
diff --git a/docs/examples/resolve.c b/docs/examples/resolve.c
index c3b52d6f0..c0b541500 100644
--- a/docs/examples/resolve.c
+++ b/docs/examples/resolve.c
@@ -31,14 +31,14 @@ int main(void)
 {
   CURL *curl;
   CURLcode res = CURLE_OK;
-  struct curl_slist *host = NULL;
 
   /* Each single name resolve string should be written using the format
      HOST:PORT:ADDRESS where HOST is the name libcurl will try to resolve,
      PORT is the port number of the service where libcurl wants to connect to
      the HOST and ADDRESS is the numerical IP address
    */
-  host = curl_slist_append(NULL, "example.com:443:127.0.0.1");
+  struct curl_slist *host = curl_slist_append(NULL,
+                                              "example.com:443:127.0.0.1");
 
   curl = curl_easy_init();
   if(curl) {
diff --git a/docs/examples/sftpuploadresume.c b/docs/examples/sftpuploadresume.c
index 98f3b62f0..e7d9d23f6 100644
--- a/docs/examples/sftpuploadresume.c
+++ b/docs/examples/sftpuploadresume.c
@@ -49,9 +49,8 @@ static curl_off_t sftpGetRemoteFileSize(const char *i_remoteFile)
 {
   CURLcode result = CURLE_GOT_NOTHING;
   curl_off_t remoteFileSizeByte = -1;
-  CURL *curlHandlePtr = NULL;
+  CURL *curlHandlePtr = curl_easy_init();
 
-  curlHandlePtr = curl_easy_init();
   curl_easy_setopt(curlHandlePtr, CURLOPT_VERBOSE, 1L);
 
   curl_easy_setopt(curlHandlePtr, CURLOPT_URL, i_remoteFile);
diff --git a/docs/examples/usercertinmem.c b/docs/examples/usercertinmem.c
index 40505b0c0..2dc264310 100644
--- a/docs/examples/usercertinmem.c
+++ b/docs/examples/usercertinmem.c
@@ -177,25 +177,25 @@ int main(void)
   CURL *ch;
   CURLcode rv;
 
-  rv = curl_global_init(CURL_GLOBAL_ALL);
+  curl_global_init(CURL_GLOBAL_ALL);
   ch = curl_easy_init();
-  rv = curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
-  rv = curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
-  rv = curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
-  rv = curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
-  rv = curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
-  rv = curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
+  curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
+  curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
+  curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
+  curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
+  curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
+  curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
+  curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
+  curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
+  curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
 
   /* both VERIFYPEER and VERIFYHOST are set to 0 in this case because there is
      no CA certificate*/
 
-  rv = curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L);
-  rv = curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
-  rv = curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM");
+  curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L);
+  curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L);
+  curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
+  curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM");
 
   /* first try: retrieve page without user certificate and key -> will fail
    */
@@ -211,7 +211,7 @@ int main(void)
    * load the certificate and key by installing a function doing the necessary
    * "modifications" to the SSL CONTEXT just before link init
    */
-  rv = curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
+  curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
   rv = curl_easy_perform(ch);
   if(rv == CURLE_OK) {
     printf("*** transfer succeeded ***\n");