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popen uses an array of pipe_data structures to record information
that's later used by pclose. pclose releases the structure after
use.
The lower-level pipe function mingw_popen_fd was also using this
array of structures but didn't provide any way to release them.
Avoid this leak by letting mingw_popen_fd use a local structure
instead.
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Make mingw_popen_fd sufficiently general that it can be used to
implement the other two popen routines.
mingw_popen now just creates a command line and passes it to
mingw_popen_fd. The one call to mingw_popen2 has been replaced
by a call to mingw_popen_fd.
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Allow wget to support https URLs. Changes are:
- Add mingw_popen2 which uses a named pipe to allow bidirectional
communication with a child process;
- Modify ssl_client to accept a WIN32 handle instead of a file
descriptor as an argument;
- Allow tls_get_random to open /dev/urandom;
- Using the above changes implement a WIN32 version of spawn_ssl_client
in wget.
This closes GitHub issue #75.
Also, enable authentication in wget.
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popen uses the shell to run the command provided. If BusyBox has
been configured appropriately use the built-in shell for this.
- Currently the only user of popen in busybox-w32 is awk, which
uses it when piping to or from commands.
- If the command is available as an applet the shell will use it.
If a different version of the program is required the command
will need to specify the full path.
- This change means that popen will work even if no shell is
present on the path.
- Since the binary may have been run as sh.exe or awk.exe it's
necessary to use the magic --busybox option.
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This also fixes piping output to a command in awk.
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