47 lines
823 B
C
47 lines
823 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <pccard/card.h>
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int
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wrattr_main(argc, argv)
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int argc;
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char *argv[];
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{
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int reg, value;
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char name[64], c;
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int fd;
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off_t offs;
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if (argc != 4) {
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fprintf(stderr, "usage: wrmem slot offs value\n");
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exit(1);
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}
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sprintf(name, "/dev/card%d", atoi(argv[1]));
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fd = open(name, 2);
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if (fd < 0) {
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perror(name);
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exit(1);
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}
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reg = MDF_ATTR;
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if (ioctl(fd, PIOCRWFLAG, ®)) {
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perror("ioctl (PIOCRWFLAG)");
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exit(1);
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}
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if (sscanf(argv[2], "%x", ®) != 1 ||
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sscanf(argv[3], "%x", &value) != 1) {
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fprintf(stderr, "arg error\n");
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exit(1);
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}
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offs = reg;
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c = value;
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lseek(fd, offs, SEEK_SET);
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if (write(fd, &c, 1) != 1)
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perror(name);
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return 0;
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}
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