e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
78 lines
1.6 KiB
Markdown
78 lines
1.6 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: curl_slist_append
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Section: 3
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Source: libcurl
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See-also:
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- curl_slist_free_all (3)
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Protocol:
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- All
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---
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# NAME
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curl_slist_append - add a string to an slist
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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struct curl_slist *curl_slist_append(struct curl_slist *list,
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const char *string);
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~~~
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# DESCRIPTION
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curl_slist_append(3) appends a string to a linked list of strings. The
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existing **list** should be passed as the first argument and the new list is
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returned from this function. Pass in NULL in the **list** argument to create
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a new list. The specified **string** has been appended when this function
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returns. curl_slist_append(3) copies the string.
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The list should be freed again (after usage) with
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curl_slist_free_all(3).
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *handle;
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struct curl_slist *slist = NULL;
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struct curl_slist *temp = NULL;
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slist = curl_slist_append(slist, "pragma:");
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if(!slist)
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return -1;
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temp = curl_slist_append(slist, "Accept:");
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if(!temp) {
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curl_slist_free_all(slist);
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return -1;
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}
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slist = temp;
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curl_easy_setopt(handle, CURLOPT_HTTPHEADER, slist);
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curl_easy_perform(handle);
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curl_slist_free_all(slist); /* free the list again */
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}
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~~~
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# AVAILABILITY
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Always
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# RETURN VALUE
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A null pointer is returned if anything went wrong, otherwise the new list
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pointer is returned. To avoid overwriting an existing non-empty list on
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failure, the new list should be returned to a temporary variable which can
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be tested for NULL before updating the original list pointer.
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