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81 lines
2.6 KiB
Groff
81 lines
2.6 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.TH curl_slist_append 3 "19 Jun 2003" "libcurl" "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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