mirror of https://github.com/FDOS/kernel.git
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <dos.h>
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#define MAX_PATH 256
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#define OPEN_HANDLE 0x3d
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#define CLOSE_HANDLE 0x3e
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#define FAILURE 0
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#define SUCCESS (!FAILURE)
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/* opens device,
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prepends device name with specified drive letter,
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returns handle to open device or -1 on error
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*/
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int open_dev(const char drive_letter, const char *device_name)
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{
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union REGS regs;
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struct SREGS sregs;
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char buffer[MAX_PATH];
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sprintf(buffer, "%c:%s", drive_letter, device_name);
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printf("Opening %s\n", buffer);
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regs.h.ah = OPEN_HANDLE;
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regs.h.al = 0;
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regs.x.dx = FP_OFF((void far *)buffer);
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sregs.ds = FP_SEG((void far *)buffer);
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intdosx(®s, ®s, &sregs);
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if (regs.x.cflag)
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return -1;
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return regs.x.ax;
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}
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/* close device using file descriptor returned from open_dev
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*/
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void close_dev(int fd)
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{
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union REGS regs;
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regs.h.ah = CLOSE_HANDLE;
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regs.x.bx = fd;
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intdos(®s, ®s);
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}
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int test_device(const char drive_letter, const char *device_name, int should_fail)
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{
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int fd;
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fd = open_dev(drive_letter, device_name);
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if (fd != -1)
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close_dev(fd);
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if ( ((fd == -1) && should_fail) || ((fd != -1) && !should_fail) )
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{
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printf("SUCCESS - ");
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if (should_fail)
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printf("open failed\n");
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else
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printf("open succeeded\n");
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return SUCCESS;
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}
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else
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{
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printf("FAILURE - ");
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if (should_fail)
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printf("open succeeded\n");
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else
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printf("open failed\n");
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return FAILURE;
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}
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}
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int do_tests_on(const char *device_name)
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{
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int status = SUCCESS;
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char buffer[MAX_PATH];
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const char current_drive = (char)('A'+_getdrive()-1);
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sprintf(buffer, "%s", device_name);
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if (!test_device('@', buffer,0)) status = FAILURE; /* special, should succeed */
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if (!test_device(current_drive, buffer,0)) status = FAILURE; /* valid directory, should succeed */
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/* DIREXIST should exist in the current directory */
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sprintf(buffer, "DIREXIST\\%s", device_name);
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if (!test_device('@', buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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if (!test_device(current_drive, buffer,0)) status = FAILURE; /* valid directory, should succeed */
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sprintf(buffer, "BAD_PATH\\%s", device_name);
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if (!test_device('@', buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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if (!test_device(current_drive, buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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/* assumes DEV directory does not exist in current directory */
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sprintf(buffer, "DEV\\%s", device_name);
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if (!test_device('@', buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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if (!test_device(current_drive, buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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sprintf(buffer, "\\%s", device_name);
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if (!test_device('@', buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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if (!test_device(current_drive, buffer,0)) status = FAILURE; /* valid directory, should succeed */
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sprintf(buffer, "\\BAD_PATH\\%s", device_name);
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if (!test_device('@', buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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if (!test_device(current_drive, buffer,1)) status = FAILURE; /* directory does not exist, should fail */
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sprintf(buffer, "\\DEV\\%s", device_name);
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if (!test_device('@', buffer,0)) status = FAILURE; /* special, should succeed */
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if (!test_device(current_drive, buffer,0)) status = FAILURE; /* special, should succeed */
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return status;
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}
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int test_CON()
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{
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return do_tests_on("CON");
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}
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int test_NUL()
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{
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return do_tests_on("NUL");
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}
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int test_COM()
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{
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return do_tests_on("COM1");
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}
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int main(int argc, char *argv[])
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{
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int error_code = 0;
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if (!test_CON()) error_code |= 0x01;
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if (!test_NUL()) error_code |= 0x02;
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if (!test_COM()) error_code |= 0x04;
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return error_code;
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}
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