44 lines
933 B
C
44 lines
933 B
C
/* mknod - build a special file Author: Andy Tanenbaum */
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
/* mknod name b/c major minor [size] makes a node. */
|
|
|
|
int mode, major, minor, dev;
|
|
unsigned int size;
|
|
|
|
if (argc < 5) badcomm();
|
|
if (*argv[2] != 'b' && *argv[2] != 'c') badcomm();
|
|
if (*argv[2] == 'c' && argc != 5) badchar();
|
|
if (*argv[2] == 'b' && argc != 6) badblock();
|
|
mode = (*argv[2] == 'b' ? 060666 : 020666);
|
|
major = atoi(argv[3]);
|
|
minor = atoi(argv[4]);
|
|
size = (*argv[2] == 'b' ? atoi(argv[5]) : 0);
|
|
if (major < 0 || minor < 0) badcomm();
|
|
dev = (major << 8) | minor;
|
|
if (mknod(argv[1], mode, dev, size) < 0) perror("mknod");
|
|
exit(0);
|
|
}
|
|
|
|
badcomm()
|
|
{
|
|
std_err("Usage: mknod name b/c major minor [size_in_blocks]\n");
|
|
exit(1);
|
|
}
|
|
|
|
badchar()
|
|
{
|
|
std_err("Usage: mknod name c major minor\n");
|
|
exit(1);
|
|
}
|
|
|
|
badblock()
|
|
{
|
|
std_err("Usage: mknod name b major minor size_in_blocks\n");
|
|
exit(1);
|
|
}
|
|
|