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Annotation of coherent/b/kernel/tools/biosports.c, revision 1.1.1.1

1.1       root        1: /* biosports.c - report com1-4 and lpt1-3 */
                      2: 
                      3: #include <fcntl.h>
                      4: 
                      5: /* a machine-dependent structure */
                      6: struct bports {
                      7:        short com[4];
                      8:        short lpt[3];
                      9: } bp;
                     10: 
                     11: #define MEM_FILE       "/dev/mem"
                     12: #define SBP            sizeof(bp)
                     13: #define PORTADDR       0x400
                     14: 
                     15: main()
                     16: {
                     17:        int fd, i, res;
                     18: 
                     19:        if ((fd = open(MEM_FILE, O_RDONLY)) < 0) {
                     20:                printf("Can't open %s\n", MEM_FILE);
                     21:                exit(1);
                     22:        }
                     23: 
                     24:        if (lseek(fd, PORTADDR, 0) != PORTADDR) {
                     25:                printf("Can't lseek to offset %d in %s\n", PORTADDR, MEM_FILE);
                     26:                exit(1);
                     27:        }
                     28: 
                     29:        if ((res = read(fd, &bp, SBP)) != SBP) {
                     30:                printf("Can't read %d bytes from %s\n", SBP, MEM_FILE);
                     31:                printf("res = %d  ");
                     32:                perror("read");
                     33:                exit(1);
                     34:        }
                     35: 
                     36:        for (i = 0; i < 4; i++)
                     37:                printf("com%d = 0x%04x\n", i+1, bp.com[i]);
                     38: 
                     39:        for (i = 0; i < 3; i++)
                     40:                printf("lpt%d = 0x%04x\n", i+1, bp.lpt[i]);
                     41: 
                     42:        close(fd);
                     43:        exit(0);
                     44: }

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