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UNIX for Dummies Questions & Answers
Named Pipe contents to a file
Post 302108465 by sb008 on Monday 26th of February 2007 08:45:00 PM
02-26-2007
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read process
=========
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=========
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Ok, I can't seem to figure this out or find anything on the web about this.
I'm on Sun Solaris, UNIX.
I have the following test script:
#!/bin/ksh
touch test.file
LOG=./tmp.log
rm -f ${LOG}
PIPE=./tmp.pipe
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trap "rm -f ${PIPE}" EXIT
tee -a ${LOG} < ${PIPE} &
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LEARN ABOUT SUNOS
usb_pipe_get_state
usb_pipe_get_state(9F) Kernel Functions for Drivers usb_pipe_get_state(9F) NAME
usb_pipe_get_state - Return USB pipe state SYNOPSIS
#include <sys/usb/usba.h> int usb_pipe_get_state(usb_pipe_handle_t pipe_handle, usb_pipe_state_t *pipe_state, usb_flags_t usb_flags); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) PARAMETERS
pipe_handle Handle of the pipe to retrieve the state. pipe_state Pointer to where pipe state is returned. usb_flags No flags are recognized. Reserved for future expansion. DESCRIPTION
The usb_pipe_get_state() function retrieves the state of the pipe referred to by pipe_handle into the location pointed to by pipe_state. Possible pipe states are: USB_PIPE_STATE_CLOSED Pipe is closed. USB_PIPE_STATE_ACTIVE Pipe is active and can send/receive data. Polling is active for isochronous and interrupt pipes. USB_PIPE_STATE_IDLE Polling is stopped for isochronous and interrupt-IN pipes. USB_PIPE_STATE_ERROR An error occurred. Client must call usb_pipe_reset(). Note that this status is not seen by a client driver if USB_ATTRS_AUTOCLEARING is set in the request attributes. USB_PIPE_STATE_CLOSING Pipe is being closed. Requests are being drained from the pipe and other cleanup is in progress. RETURN VALUES
USB_SUCCESS Pipe state returned in second argument. USB_INVALID_ARGS Pipe_state argument is NULL. USB_INVALID_PIPE Pipe_handle argument is NULL. CONTEXT
May be called from user, kernel or interrupt context. EXAMPLES
usb_pipe_handle_t pipe; usb_pipe_state_t state; /* Recover if the pipe is in an error state. */ if ((usb_pipe_get_state(pipe, &state, 0) == USB_SUCCESS) && (state == USB_PIPE_STATE_ERROR)) { cmn_err (CE_WARN, "%s%d: USB Pipe error.", ddi_driver_name(dip), ddi_get_instance(dip)); do_recovery(); } ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |PCI-based systems | +-----------------------------+-----------------------------+ |Interface stability |Evolving | +-----------------------------+-----------------------------+ |Availability |SUNWusb | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), usb_clr_feature(9F), usb_get_cfg(9F). usb_get_status(9F), usb_pipe_close(9F), usb_pipe_ctrl_xfer(9F), usb_pipe_open(9F). usb_pipe_reset(9F) SunOS 5.10 5 Jan 2004 usb_pipe_get_state(9F)