curl/docs/libcurl/curl_slist_append.3
max.mehl ad9bc5976d
copyright: make repository REUSE compliant
Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869
2022-06-13 09:13:00 +02:00

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.\" **************************************************************************
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.TH curl_slist_append 3 "19 Jun 2003" "libcurl 7.10.4" "libcurl Manual"
.SH NAME
curl_slist_append - add a string to an slist
.SH SYNOPSIS
.nf
#include <curl/curl.h>
struct curl_slist *curl_slist_append(struct curl_slist *list,
const char *string);
.fi
.SH DESCRIPTION
\fIcurl_slist_append(3)\fP appends a string to a linked list of strings. The
existing \fBlist\fP should be passed as the first argument and the new list is
returned from this function. Pass in NULL in the \fBlist\fP argument to create
a new list. The specified \fBstring\fP has been appended when this function
returns. \fIcurl_slist_append(3)\fP copies the string.
The list should be freed again (after usage) with
\fIcurl_slist_free_all(3)\fP.
.SH EXAMPLE
.nf
CURL *handle;
struct curl_slist *slist=NULL;
struct curl_slist *temp=NULL;
slist = curl_slist_append(slist, "pragma:");
if (slist == NULL)
return -1;
temp = curl_slist_append(slist, "Accept:")
if (temp == NULL) {
curl_slist_free_all(slist);
return -1;
}
slist = temp;
curl_easy_setopt(handle, CURLOPT_HTTPHEADER, slist);
curl_easy_perform(handle);
curl_slist_free_all(slist); /* free the list again */
.fi
.SH AVAILABILITY
Always
.SH RETURN VALUE
A null pointer is returned if anything went wrong, otherwise the new list
pointer is returned. To avoid overwriting an existing non-empty list on
failure, the new list should be returned to a temporary variable which can
be tested for NULL before updating the original list pointer.
.SH "SEE ALSO"
.BR curl_slist_free_all "(3), "