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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/synctime.c
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@ -245,6 +245,7 @@ static int conf_init(struct conf *conf)
int main(int argc, char *argv[])
{
CURLcode res;
CURL *curl;
struct conf conf[1];
int RetValue;
@ -285,7 +286,10 @@ int main(int argc, char *argv[])
snprintf(conf->timeserver, MAX_STRING, "%s", DefaultTimeServer[0]);
/* Init CURL before usage */
curl_global_init(CURL_GLOBAL_ALL);
res = curl_global_init(CURL_GLOBAL_ALL);
if(res)
return (int)res;
curl = curl_easy_init();
if(curl) {
struct tm *lt;