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telnet: Allow programatic use of telnet.

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The main change is to allow input from user-specified methods,
when they are specified with CURLOPT_READFUNCTION.
All calls to fflush(stdout) in telnet.c were removed, which makes
using 'curl telnet://foo.com' painful since prompts and other data
are not always returned to the user promptly.  Use
'curl --no-buffer telnet://foo.com' instead.  In general,
the user should have their CURLOPT_WRITEFUNCTION do a fflush
for interactive use.

Also fix assumption that reading from stdin never returns < 0.
Old code could crash in that case.

Call progress functions in telnet main loop.

Signed-off-by: Ben Greear <greearb@candelatech.com>
This commit is contained in:
Ben Greear 2010-04-29 00:49:04 +02:00 • committed by Daniel Stenberg
parent 7f616eb513
commit 38d2afcefb
4 changed files with 86 additions and 30 deletions
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4
src/main.c
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@ -4987,7 +4987,9 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
input.config = config;
my_setopt(curl, CURLOPT_READDATA, &input);
/* what call to read */
my_setopt(curl, CURLOPT_READFUNCTION, my_fread);
if ((outfile && !curlx_strequal("-", outfile)) ||
!curlx_strnequal(url, "telnet:", 7))
my_setopt(curl, CURLOPT_READFUNCTION, my_fread);
/* in 7.18.0, the CURLOPT_SEEKFUNCTION/DATA pair is taking over what
CURLOPT_IOCTLFUNCTION/DATA pair previously provided for seeking */