Add support for specifying drivers by name and listing the drivers in the
current kernel. Man page update in progress.
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dsl
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@ -1,4 +1,4 @@
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/* $NetBSD: mknod.c,v 1.31 2004/05/11 17:09:58 christos Exp $ */
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/* $NetBSD: mknod.c,v 1.32 2004/06/17 21:09:01 dsl Exp $ */
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/*-
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* Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
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@ -43,12 +43,13 @@
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.\n");
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__RCSID("$NetBSD: mknod.c,v 1.31 2004/05/11 17:09:58 christos Exp $");
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__RCSID("$NetBSD: mknod.c,v 1.32 2004/06/17 21:09:01 dsl Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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@ -69,6 +70,15 @@ static portdev_t callPack(pack_t *, int, u_long *);
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int main(int, char *[]);
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static void usage(void);
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#ifdef KERN_DRIVERS
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static struct kinfo_drivers *kern_drivers;
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static int num_drivers;
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static void get_device_info(void);
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static void print_device_info(char **);
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static int major_from_name(const char *, mode_t);
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#endif
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#define MAXARGS 3 /* 3 for bsdos, 2 for rest */
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int
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@ -81,6 +91,10 @@ main(int argc, char **argv)
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u_long numbers[MAXARGS];
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int n, ch, fifo, hasformat;
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int r_flag = 0; /* force: delete existing entry */
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#ifdef KERN_DRIVERS
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int l_flag = 0; /* list device names and numbers */
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int major;
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#endif
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void *modes = 0;
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uid_t uid = -1;
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gid_t gid = -1;
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@ -90,9 +104,19 @@ main(int argc, char **argv)
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fifo = hasformat = 0;
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pack = pack_native;
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#ifdef KERN_DRIVERS
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while ((ch = getopt(argc, argv, "lrRF:g:m:u:")) != -1) {
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#else
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while ((ch = getopt(argc, argv, "rRF:g:m:u:")) != -1) {
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#endif
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switch (ch) {
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#ifdef KERN_DRIVERS
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case 'l':
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l_flag = 1;
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break;
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#endif
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case 'r':
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r_flag = 1;
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break;
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@ -148,6 +172,13 @@ main(int argc, char **argv)
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argc -= optind;
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argv += optind;
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#ifdef KERN_DRIVERS
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if (l_flag) {
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print_device_info(argv);
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return 0;
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}
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#endif
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if (argc < 2 || argc > 10)
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usage();
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@ -196,6 +227,17 @@ main(int argc, char **argv)
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numbers[n] = strtoul(argv[n], &p, 0);
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if (*p == 0 && errno == 0)
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continue;
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#ifdef KERN_DRIVERS
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if (n == 0) {
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major = major_from_name(argv[0], mode);
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if (major != -1) {
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numbers[0] = major;
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continue;
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}
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if (!isdigit(*(unsigned char *)argv[0]))
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errx(1, "unknown driver: %s", argv[0]);
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}
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#endif
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errx(1, "invalid number: %s", argv[n]);
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}
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@ -215,10 +257,6 @@ main(int argc, char **argv)
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if (modes != NULL)
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mode = getmode(modes, mode);
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#if 0
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printf("name: %s\nmode: %05o\ndev: %08x\nuid: %5d\ngid: %5d\n",
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name, mode, dev, uid, gid);
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#endif
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umask(0);
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rval = fifo ? mkfifo(name, mode) : mknod(name, mode, dev);
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if (rval < 0 && errno == EEXIST && r_flag) {
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@ -258,10 +296,17 @@ usage(void)
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"usage: %s [-rR] [-F format] [-m mode] [-u user] [-g group]\n",
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progname);
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(void)fprintf(stderr,
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#ifdef KERN_DRIVERS
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" [ name [b | c] [major | driver] minor\n"
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#else
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" [ name [b | c] major minor\n"
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#endif
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" | name [b | c] major unit subunit\n"
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" | name [b | c] number\n"
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" | name p ]\n");
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#ifdef KERN_DRIVERS
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(void)fprintf(stderr, " %s -l [driver] ...\n", progname);
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#endif
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exit(1);
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}
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@ -288,3 +333,66 @@ callPack(pack_t *f, int n, u_long *numbers)
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errx(1, "%s", error);
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return d;
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}
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#ifdef KERN_DRIVERS
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static void
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get_device_info(void)
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{
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static int mib[2] = {CTL_KERN, KERN_DRIVERS};
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size_t len;
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if (sysctl(mib, 2, NULL, &len, NULL, 0) != 0)
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err(1, "kern.drivers" );
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kern_drivers = malloc(len);
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if (kern_drivers == NULL)
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err(1, "malloc");
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if (sysctl(mib, 2, kern_drivers, &len, NULL, 0) != 0)
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err(1, "kern.drivers" );
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num_drivers = len / sizeof *kern_drivers;
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}
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static void
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print_device_info(char **names)
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{
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int i;
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struct kinfo_drivers *kd;
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if (kern_drivers == NULL)
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get_device_info();
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do {
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kd = kern_drivers;
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for (i = 0; i < num_drivers; kd++, i++) {
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if (*names && strcmp(*names, kd->d_name))
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continue;
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printf("%s", kd->d_name);
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if (kd->d_cmajor != -1)
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printf(" character major %d", kd->d_cmajor);
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if (kd->d_bmajor != -1)
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printf(" block major %d", kd->d_bmajor);
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printf("\n");
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}
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} while (*names && *++names);
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}
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static int
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major_from_name(const char *name, mode_t mode)
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{
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int i;
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struct kinfo_drivers *kd;
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if (kern_drivers == NULL)
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get_device_info();
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kd = kern_drivers;
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for (i = 0; i < num_drivers; kd++, i++) {
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if (strcmp(name, kd->d_name))
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continue;
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if (mode & S_IFCHR)
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return kd->d_cmajor;
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return kd->d_bmajor;
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}
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return -1;
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}
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#endif
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