75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
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#include <unistd.h>
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#include <assert.h>
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#include <stdio.h>
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#include <signal.h>
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#include "init.h"
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#include "sg.h"
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#include "error.h"
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#include "libburn.h"
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#include "drive.h"
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int burn_running = 0;
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/* ts A60813 : wether to use O_EXCL and/or O_NONBLOCK in libburn/sg.c */
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int burn_sg_open_o_excl = 1;
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/* O_NONBLOCK was hardcoded in enumerate_ata() which i hardly use.
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For enumerate_sg() it seems ok.
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So it should stay default mode until enumerate_ata() without O_NONBLOCK
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has been thoroughly tested. */
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int burn_sg_open_o_nonblock = 1;
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/* wether to take a busy drive as an error */
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/* Caution: this is implemented by a rough hack and eventually leads
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to unconditional abort of the process */
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int burn_sg_open_abort_busy = 0;
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int burn_initialize(void)
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{
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if (burn_running)
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return 1;
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burn_running = 1;
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return 1;
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}
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void burn_finish(void)
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{
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assert(burn_running);
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burn_wait_all();
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burn_drive_free();
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burn_running = 0;
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}
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/* ts A60813 */
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/** Set parameters for behavior on opening device files. To be called early
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after burn_initialize() and before any bus scan. But not mandatory at all.
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@param exclusive Try to open only devices which are not marked as busy
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and try to mark them busy if opened sucessfully. (O_EXCL)
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There are kernels which simply don't care about O_EXCL.
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Some have it off, some have it on, some are switchable.
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@param blocking Try to wait for drives which do not open immediately but
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also do not return an error as well. (O_NONBLOCK)
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This might stall indefinitely with /dev/hdX hard disks.
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@param abort_on_busy Unconditionally abort process when a non blocking
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exclusive opening attempt indicates a busy drive.
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Use this only after thorough tests with your app.
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Parameter value 1 enables a feature, 0 disables.
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Default is (1,0,0). Have a good reason before you change it.
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*/
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void burn_preset_device_open(int exclusive, int blocking, int abort_on_busy)
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{
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assert(burn_running);
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burn_sg_open_o_excl= !!exclusive;
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burn_sg_open_o_nonblock= !blocking;
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burn_sg_open_abort_busy= !!abort_on_busy;
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}
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