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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
char *progname;
static __noreturn usage(void)
{
fprintf(stderr, "Usage: %s [-m mode] name {b|c|p} major minor\n",
progname);
exit(1);
}
int main(int argc, char *argv[])
{
char *name, *type, typec, *endp;
unsigned int major_num, minor_num;
mode_t mode, mode_set = 0;
dev_t dev;
progname = *argv++;
if (argc == 1)
usage();
if (argv[0][0] == '-' && argv[0][1] == 'm' && !argv[0][2]) {
mode_set = strtoul(argv[1], &endp, 8);
argv += 2;
}
name = *argv++;
if (!name)
usage();
type = *argv++;
if (!type || !type[0] || type[1])
usage();
typec = type[0];
mode = 0;
switch (typec) {
case 'c':
mode = S_IFCHR;
break;
case 'b':
mode = S_IFBLK;
break;
case 'p':
mode = S_IFIFO;
break;
default:
usage();
}
if (mode == S_IFIFO) {
dev = 0;
} else {
if (!argv[0] || !argv[1])
usage();
major_num = strtol(*argv++, &endp, 0);
if (*endp != '\0')
usage();
minor_num = strtol(*argv++, &endp, 0);
if (*endp != '\0')
usage();
dev = makedev(major_num, minor_num);
}
if (*argv)
usage();
if (mknod(name, mode|0666, dev) == -1) {
perror("mknod");
exit(1);
}
if (mode_set && chmod(name, mode_set)) {
perror("chmod");
exit(1);
}
exit(0);
}
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