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59 lines
1.6 KiB
Groff
59 lines
1.6 KiB
Groff
.\" generated by cd2nroff 0.1 from curl_slist_append.md
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.TH curl_slist_append 3 "March 15 2024" libcurl
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.SH NAME
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curl_slist_append \- add a string to an slist
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.SH SYNOPSIS
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.nf
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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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.fi
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.SH DESCRIPTION
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\fIcurl_slist_append(3)\fP appends a string to a linked list of strings. The
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existing \fBlist\fP 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 \fBlist\fP argument to create
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a new list. The specified \fBstring\fP has been appended when this function
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returns. \fIcurl_slist_append(3)\fP copies the string.
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The list should be freed again (after usage) with
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\fIcurl_slist_free_all(3)\fP.
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.SH EXAMPLE
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.nf
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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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.fi
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.SH AVAILABILITY
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Always
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.SH 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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.SH SEE ALSO
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.BR curl_slist_free_all (3)
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