70 lines
1.4 KiB
C
Executable file
70 lines
1.4 KiB
C
Executable file
/* mknod - build a special file Author: Andy Tanenbaum */
|
|
|
|
#include <sys/types.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <minix/minlib.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
|
|
_PROTOTYPE(int main, (int argc, char *argv []));
|
|
_PROTOTYPE(void badcomm, (void));
|
|
_PROTOTYPE(void badfifo, (void));
|
|
_PROTOTYPE(void badchar, (void));
|
|
_PROTOTYPE(void badblock, (void));
|
|
|
|
int main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
/* Mknod name b/c major minor makes a node. */
|
|
|
|
int mode, major, minor, dev;
|
|
|
|
if (argc < 3) badcomm();
|
|
if (*argv[2] != 'b' && *argv[2] != 'c' && *argv[2] != 'p') badcomm();
|
|
if (*argv[2] == 'p' && argc != 3) badfifo();
|
|
if (*argv[2] == 'c' && argc != 5) badchar();
|
|
if (*argv[2] == 'b' && argc != 5) badblock();
|
|
if (*argv[2] == 'p') {
|
|
mode = 010666;
|
|
dev = 0;
|
|
} else {
|
|
mode = (*argv[2] == 'b' ? 060666 : 020666);
|
|
major = atoi(argv[3]);
|
|
minor = atoi(argv[4]);
|
|
if (major - 1 > 0xFE || minor > 0xFF) badcomm();
|
|
dev = (major << 8) | minor;
|
|
}
|
|
if (mknod(argv[1], mode, dev) < 0) {
|
|
int err = errno;
|
|
std_err("mknod: ");
|
|
errno = err;
|
|
perror(argv[1]);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
void badcomm()
|
|
{
|
|
std_err("Usage: mknod name b/c/p [major minor]\n");
|
|
exit(1);
|
|
}
|
|
|
|
void badfifo()
|
|
{
|
|
std_err("Usage: mknod name p\n");
|
|
exit(1);
|
|
}
|
|
|
|
void badchar()
|
|
{
|
|
std_err("Usage: mknod name c major minor\n");
|
|
exit(1);
|
|
}
|
|
|
|
void badblock()
|
|
{
|
|
std_err("Usage: mknod name b major minor\n");
|
|
exit(1);
|
|
}
|