/* $OpenBSD: mknod.c,v 1.29 2016/03/07 19:16:06 tb Exp $ */ /* $NetBSD: mknod.c,v 1.8 1995/08/11 00:08:18 jtc Exp $ */ /* * Copyright (c) 1997-2016 Theo de Raadt , * Marc Espie , Todd Miller , * Martin Natano * * 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 #include #include #include #include #include #include #include #include #include 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; setlocale(LC_ALL, ""); 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 < 0) { 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); }