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CURLOPT_UPLOAD_FLAGS(3) Library Functions Manual CURLOPT_UPLOAD_FLAGS(3) NAME CURLOPT_UPLOAD_FLAGS - upload flags for IMAP SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPLOAD_FLAGS, long bitmask); DESCRIPTION Pass a long as parameter, which is set to a bitmask, to tell libcurl which flags to send the server relating to uploaded files. The cur- rently supported flags are: CURLULFLAG_ANSWERED Sets the Answered flag for IMAP uploads. Indicates that the mes- sage has been replied to. CURLULFLAG_DELETED Sets the Deleted flag for IMAP uploads. Marks the message for deletion rather than immediately removing it. CURLULFLAG_DRAFT Sets the Draft flag for IMAP uploads. Marks the message as an uncompleted composition. CURLULFLAG_FLAGGED Sets the Flagged flag for IMAP uploads. Marks the message for special attention. CURLULFLAG_SEEN Sets the Seen flag for IMAP uploads. Marks the message as read. DEFAULT A bitmask with only the CURLULFLAG_SEEN flag set. PROTOCOLS This functionality affects imap and imaps EXAMPLE static size_t read_cb(char *ptr, size_t size, size_t nmemb, void *userdata) { FILE *src = userdata; /* copy as much data as possible into the 'ptr' buffer, but no more than 'size' * 'nmemb' bytes */ size_t retcode = fread(ptr, size, nmemb, src); return retcode; } int main(void) { CURL *curl; FILE *src = fopen("local-file", "r"); if(!src) return 1; curl = curl_easy_init(); if(curl) { CURLcode result; curl_off_t fsize = 9876; /* set this to the size of the input file */ /* we want to use our own read function */ curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_cb); /* enable uploading */ curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); /* specify target */ curl_easy_setopt(curl, CURLOPT_URL, "imap://example.com:993/mailbox"); /* provide username */ curl_easy_setopt(curl, CURLOPT_USERNAME, "user@example.com"); /* provide password */ curl_easy_setopt(curl, CURLOPT_PASSWORD, "password"); /* specify that uploaded mail should be considered flagged */ curl_easy_setopt(curl, CURLOPT_UPLOAD_FLAGS, CURLULFLAG_FLAGGED); /* now specify which pointer to pass to our callback */ curl_easy_setopt(curl, CURLOPT_READDATA, src); /* Set the size of the file to upload */ curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize); /* perform the upload */ result = curl_easy_perform(curl); curl_easy_cleanup(curl); } fclose(src); } AVAILABILITY Added in curl 8.13.0 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_UPLOAD(3) libcurl 2026-06-11 CURLOPT_UPLOAD_FLAGS(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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