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/* $OpenBSD: mknod.c,v 1.31 2019/06/28 13:32:44 deraadt Exp $ */
/* $NetBSD: mknod.c,v 1.8 1995/08/11 00:08:18 jtc Exp $ */
/*
* Copyright (c) 1997-2016 Theo de Raadt <deraadt@openbsd.org>,
* Marc Espie <espie@openbsd.org>, Todd Miller <millert@openbsd.org>,
* Martin Natano <natano@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
extern char *__progname;
struct node {
const char *name;
mode_t mode;
dev_t dev;
char mflag;
};
static int domakenodes(struct node *, int);
static dev_t compute_device(int, char **);
__dead static void usage(int);
int
main(int argc, char *argv[])
{
struct node *node;
int ismkfifo;
int n = 0;
int mode = DEFFILEMODE;
int mflag = 0;
void *set;
int ch;
if (pledge("stdio dpath", NULL) == -1)
err(1, "pledge");
node = reallocarray(NULL, sizeof(struct node), argc);
if (!node)
err(1, NULL);
ismkfifo = strcmp(__progname, "mkfifo") == 0;
/* we parse all arguments upfront */
while (argc > 1) {
while ((ch = getopt(argc, argv, "m:")) != -1) {
switch (ch) {
case 'm':
if (!(set = setmode(optarg)))
errx(1, "invalid file mode '%s'",
optarg);
/*
* In symbolic mode strings, the + and -
* operators are interpreted relative to
* an assumed initial mode of a=rw.
*/
mode = getmode(set, DEFFILEMODE);
if ((mode & ACCESSPERMS) != mode)
errx(1, "forbidden mode: %o", mode);
mflag = 1;
free(set);
break;
default:
usage(ismkfifo);
}
}
argc -= optind;
argv += optind;
if (ismkfifo) {
while (*argv) {
node[n].mode = mode | S_IFIFO;
node[n].mflag = mflag;
node[n].name = *argv;
node[n].dev = 0;
n++;
argv++;
}
/* XXX no multiple getopt */
break;
} else {
if (argc < 2)
usage(ismkfifo);
node[n].mode = mode;
node[n].mflag = mflag;
node[n].name = argv[0];
if (strlen(argv[1]) != 1)
errx(1, "invalid device type '%s'", argv[1]);
/* XXX computation offset by one for next getopt */
switch(argv[1][0]) {
case 'p':
node[n].mode |= S_IFIFO;
node[n].dev = 0;
argv++;
argc--;
break;
case 'b':
node[n].mode |= S_IFBLK;
goto common;
case 'c':
node[n].mode |= S_IFCHR;
common:
node[n].dev = compute_device(argc, argv);
argv+=3;
argc-=3;
break;
default:
errx(1, "invalid device type '%s'", argv[1]);
}
n++;
}
optind = 1;
optreset = 1;
}
if (n == 0)
usage(ismkfifo);
return (domakenodes(node, n));
}
static dev_t
compute_device(int argc, char **argv)
{
dev_t dev;
char *endp;
unsigned long major, minor;
if (argc < 4)
usage(0);
errno = 0;
major = strtoul(argv[2], &endp, 0);
if (endp == argv[2] || *endp != '\0')
errx(1, "invalid major number '%s'", argv[2]);
if (errno == ERANGE && major == ULONG_MAX)
errx(1, "major number too large: '%s'", argv[2]);
errno = 0;
minor = strtoul(argv[3], &endp, 0);
if (endp == argv[3] || *endp != '\0')
errx(1, "invalid minor number '%s'", argv[3]);
if (errno == ERANGE && minor == ULONG_MAX)
errx(1, "minor number too large: '%s'", argv[3]);
dev = makedev(major, minor);
if (major(dev) != major || minor(dev) != minor)
errx(1, "major or minor number too large (%lu %lu)", major,
minor);
return dev;
}
static int
domakenodes(struct node *node, int n)
{
int done_umask = 0;
int rv = 0;
int i;
for (i = 0; i != n; i++) {
int r;
/*
* If the user specified a mode via `-m', don't allow the umask
* to modify it. If no `-m' flag was specified, the default
* mode is the value of the bitwise inclusive or of S_IRUSR,
* S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH as
* modified by the umask.
*/
if (node[i].mflag && !done_umask) {
(void)umask(0);
done_umask = 1;
}
r = mknod(node[i].name, node[i].mode, node[i].dev);
if (r == -1) {
warn("%s", node[i].name);
rv = 1;
}
}
free(node);
return rv;
}
__dead static void
usage(int ismkfifo)
{
if (ismkfifo == 1)
(void)fprintf(stderr, "usage: %s [-m mode] fifo_name ...\n",
__progname);
else {
(void)fprintf(stderr,
"usage: %s [-m mode] name b|c major minor\n",
__progname);
(void)fprintf(stderr, " %s [-m mode] name p\n",
__progname);
}
exit(1);
}
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