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examples: improve global init, error checks and returning errors

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- add `curl_global_init()` and `curl_global_cleanup()` where missing.
- check the result of `curl_global_init()` where missing.
- return the last curl error from `main()`.
- drop Win32-specific socket initialization in favor of `curl_global_init()`.
- rename some outliers to `res` for curl result code.
- fix cleanup in some error cases.

Inspired by Joshua's report on examples.

Closes #19053
This commit is contained in:
Viktor Szakats 2025-10-13 16:30:18 +02:00
parent 3049c8e0a0
commit 4c7507daf9
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129 changed files with 990 additions and 485 deletions
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6
docs/examples/crawler.c
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@ -182,10 +182,14 @@ int main(void)
int pending;
int complete;
int still_running;
CURLcode res;
res = curl_global_init(CURL_GLOBAL_ALL);
if(res)
return (int)res;
signal(SIGINT, sighandler);
LIBXML_TEST_VERSION
curl_global_init(CURL_GLOBAL_DEFAULT);
multi_handle = curl_multi_init();
curl_multi_setopt(multi_handle, CURLMOPT_MAX_TOTAL_CONNECTIONS, max_con);
curl_multi_setopt(multi_handle, CURLMOPT_MAX_HOST_CONNECTIONS, 6L);