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deps/curl/docs/libcurl/opts/CURLOPT_RESUME_FROM_LARGE.md

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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_RESUME_FROM_LARGE
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_INFILESIZE_LARGE (3)
+  - CURLOPT_RANGE (3)
+  - CURLOPT_RESUME_FROM (3)
+---
+
+# NAME
+
+CURLOPT_RESUME_FROM_LARGE - offset to resume transfer from
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE,
+                          curl_off_t from);
+~~~
+
+# DESCRIPTION
+
+Pass a curl_off_t as parameter. It contains the offset in number of bytes that
+you want the transfer to start from. Set this option to 0 to make the transfer
+start from the beginning (effectively disabling resume). For FTP, set this
+option to -1 to make the transfer start from the end of the target file
+(useful to continue an interrupted upload).
+
+When doing uploads with FTP, the resume position is where in the local/source
+file libcurl should try to resume the upload from and it appends the source
+file to the remote target file.
+
+# DEFAULT
+
+0, not used
+
+# PROTOCOLS
+
+HTTP, FTP, SFTP, FILE
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_off_t resume_position; /* get it somehow */
+    curl_off_t file_size; /* get it somehow as well */
+
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
+
+    /* resuming upload at this position, possibly beyond 2GB */
+    curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, resume_position);
+
+    /* ask for upload */
+    curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
+
+    /* set total data amount to expect */
+    curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_size);
+
+    /* Perform the request */
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# AVAILABILITY
+
+Added in 7.11.0
+
+# RETURN VALUE
+
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.