/*
* devnodes.c - device inode creation functions
*
* Erik Troan <ewt@redhat.com>
* Matt Wilson <msw@redhat.com>
*
* Copyright 1998-2001 Red Hat, Inc.
* Copyright 1996-1998 Red Hat Software, Inc.
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
struct devnum {
char * name;
short major, minor;
int isChar;
};
static struct devnum devices[] = {
{ "aztcd", 29, 0, 0 },
{ "pcd", 46, 0, 0 },
{ "cdu31a", 15, 0, 0 },
{ "cdu535", 24, 0, 0 },
{ "cm206cd", 32, 0, 0 },
{ "fd0", 2, 0, 0 },
{ "fd1", 2, 1, 0 },
{ "gscd", 16, 0, 0 },
{ "input/mouse0", 13, 32, 1 },
{ "input/mouse1", 13, 33, 1 },
{ "input/mouse2", 13, 34, 1 },
{ "input/mouse3", 13, 35, 1 },
{ "lp0", 6, 0, 1 },
{ "lp1", 6, 1, 1 },
{ "lp2", 6, 2, 1 },
{ "mcd", 23, 0, 0 },
{ "mcdx", 20, 0, 0 },
{ "nst0", 9, 128, 1 },
{ "optcd", 17, 0, 0 },
{ "psaux", 10, 1, 1 },
{ "sbpcd", 25, 0, 0 },
{ "sjcd", 18, 0, 0 },
{ "ttyS0", 4, 64, 1 },
{ "ttyS1", 4, 65, 1 },
{ "ttyS2", 4, 66, 1 },
{ "ttyS3", 4, 67, 1 },
};
int numDevices = sizeof(devices) / sizeof(struct devnum);
#include <linux/major.h>
/* from linux/drivers/scsi/sd.c */
static int sd_major(int major_idx) {
switch (major_idx) {
case 0:
return SCSI_DISK0_MAJOR;
case 1 ... 7:
return SCSI_DISK1_MAJOR + major_idx - 1;
case 8 ... 15:
return SCSI_DISK8_MAJOR + major_idx - 8;
default:
/* this shouldn't happen... but if it does, return -1 */
return -1;
}
}
int devMakeInode(char * devName, char * path) {
int i;
int major, minor;
int type;
char *ptr;
char *dir;
/* scsi devices sda - sdp: major 8, minor 0 - 255 */
/* scsi devices sdq - sdaf: major 65, minor 0 - 255 */
/* scsi devices sdqg - sdav: major 66, minor 0 - 255 */
/* etc... */
if (devName[0] == 's' && devName[1] == 'd') {
int drive = 0;
char *num = NULL;
type = S_IFBLK;
if (devName[3] && isdigit(devName[3])) {
drive = devName[2] - 'a';
num = devName + 3;
} else if (devName[3] && islower(devName[3])) {
drive = ((devName[2] - 'a' + 1) * 26) + devName[3] - 'a';
num = devName + 4;
} else
drive = devName[2] - 'a';
major = sd_major((drive & 0xf0) >> 4);
if (major < 0)
return major;
minor = (drive * 16) % 256;
minor += (drive & 0xfff00);
if (num && num[0] && num[1])
minor += (num[0] - '0') * 10 + (num[1] - '0');
else if (num && num[0])
minor += (num[0] - '0');
} else if (devName[0] == 'm' && devName[1] == 'd') {
type = S_IFBLK;
major = 9;
minor = atoi(devName + 2);
} else if (devName[0] == 's' && devName[1] == 'g') {
type = S_IFBLK;
major = 21;
minor = atoi(devName + 2);
} else if (!strncmp(devName, "loop", 4)) {
type = S_IFBLK;
major = 7;
minor = atoi(devName + 4);
} else if (!strncmp(devName, "scd", 3)) {
type = S_IFBLK;
major = 11;
minor = atoi(devName + 3);
} else if (devName[0] == 'h' && devName[1] == 'd') {
type = S_IFBLK;
if (devName[2] == 'a')
major = 3, minor = 0;
else if (devName[2] == 'b')
major = 3, minor = 64;
else if (devName[2] == 'c')
major = 22, minor = 0;
else if (devName[2] == 'd')
major = 22, minor = 64;
else if (devName[2] == 'e')
major = 33, minor = 0;
else if (devName[2] == 'f')
major = 33, minor = 64;
else if (devName[2] == 'g')
major = 34, minor = 0;
else if (devName[2] == 'h')
major = 34, minor = 64;
else if (devName[2] == 'i')
major = 56, minor = 0;
else if (devName[2] == 'j')
major = 56, minor = 64;
else if (devName[2] == 'k')
major = 57, minor = 0;
else if (devName[2] == 'l')
major = 57, minor = 64;
else if (devName[2] == 'm')
major = 88, minor = 0;
else if (devName[2] == 'n')
major = 88, minor = 64;
else if (devName[2] == 'o')
major = 89, minor = 0;
else if (devName[2] == 'p')
major = 89, minor = 64;
else if (devName[2] == 'q')
major = 90, minor = 0;
else if (devName[2] == 'r')
major = 90, minor = 64;
else if (devName[2] == 's')
major = 91, minor = 0;
else if (devName[2] == 't')
major = 91, minor = 64;
else
return -1;
if (devName[3] && devName[4])
minor += (devName[3] - '0') * 10 + (devName[4] - '0');
else if (devName[3])
minor += (devName[3] - '0');
} else if (!strncmp(devName, "ram", 3)) {
type = S_IFBLK;
major = 1;
minor = 1;
if (devName[3])
minor += devName[3] - '1';
#if defined (__s390__) || defined (__s390x__)
} else if (!strncmp(devName, "dasd", 4) && strlen(devName) > 4) {
/* IBM Dasd Drives */
type = S_IFBLK;
major = 94;
minor = ( devName[4] - 'a' ) * 4;
if (devName[5] && isalpha(devName[5])) {
minor += 26 * 4 + ( devName[5] - 'a' ) * 4;
if (devName[6] && isdigit(devName[6]) )
minor += devName[6] - '0';
} else if (devName[5] && isdigit(devName[5])) {
minor += devName[5] - '0';
}
} else if (!strncmp(devName, "mnd", 4)) {
/* IBM MiniDisk Drives */
type = S_IFBLK;
major = 95;
minor = devName[3] - 'a';
#endif
} else if (!strncmp(devName, "rd/", 3)) {
/* dac 960 "/rd/c0d0{p1}" */
int c, d, p;
c = d = p = 0;
sscanf(devName + 3, "c%dd%dp%d", &c, &d, &p);
type = S_IFBLK;
major = 48 + c; /* controller */
minor = d * 8; /* disk */
minor += p; /* partition */
} else if (!strncmp(devName, "ida/", 4)) {
/* Compaq Smart Array "ida/c0d0{p1} */
int c, d, p;
c = d = p = 0;
sscanf(devName + 4, "c%dd%dp%d", &c, &d, &p);
type = S_IFBLK;
major = 72 + c; /* controller */
minor = d * 16; /* disk */
minor += p; /* partition */
} else if (!strncmp(devName, "cciss/", 6)) {
/* Compaq Smart Array 5300 "cciss/c0d0{p1} */
int c, d, p;
c = d = p = 0;
sscanf(devName + 6, "c%dd%dp%d", &c, &d, &p);
type = S_IFBLK;
major = 104 + c; /* controller */
minor = d * 16; /* disk */
minor += p; /* partition */
} else if (!strncmp(devName, "ataraid/", 8)) {
type = S_IFBLK;
major = 114; /* controller */
minor = (devName[9] - '0') * 16; /* disk */
if (strlen(devName) > 10) /* partition */
minor += atoi(devName + 11);
} else if (!strncmp(devName, "sx8/", 4)) {
/* Promise SX8 "sx8/0{p1} */
int d, p;
d = p = 0;
sscanf(devName + 4, "%dp%d", &d, &p);
type = S_IFBLK;
major = 160 + (d/8); /* controller */
minor = (d % 8) * 32; /* disk */
minor += p; /* partition */
} else if (!strncmp(devName, "i2o/", 4)) {
/* I2O Block Device "i2o/hda */
type = S_IFBLK;
major = 80; /* controller */
minor = (devName[6] - 'a')*16;
if ((devName[7]) && isdigit(devName[7]))
{
minor = minor + atoi(devName + 7);
}
} else if (!strncmp(devName, "iseries/vcd", 11)) {
/* IBM virtual cdrom (iseries) */
type = S_IFBLK;
major = 113;
minor = devName[11] - 'a';
} else if (!strncmp(devName, "iseries/vd", 10)) {
int drive = 0;
char * num = NULL;
/* IBM virtual disk (iseries) */
type = S_IFBLK;
major = 112;
if (devName[11] && isdigit(devName[11])) {
drive = devName[10] - 'a';
num = devName + 11;
} else if (devName[11] && islower(devName[11])) {
drive = ((devName[10] - 'a' + 1) * 26) + devName[11] - 'a';
num = devName + 12;
} else {
drive = devName[10] - 'a';
}
minor = (drive * 8);
if (num && num[0])
minor += (num[0] - '0');
} else {
for (i = 0; i < numDevices; i++) {
if (!strcmp(devices[i].name, devName)) break;
}
if (i == numDevices) return -1;
major = devices[i].major;
minor = devices[i].minor;
if (devices[i].isChar)
type = S_IFCHR;
else
type = S_IFBLK;
}
ptr = path;
i = 0;
while (*ptr)
if (*ptr++ == '/')
i++;
if (i > 2) {
dir = alloca(strlen(path) + 1);
strcpy(dir, path);
ptr = dir + (strlen(path) - 1);
while (*ptr != '/')
*ptr-- = '\0';
mkdir(dir, 0644);
}
unlink(path);
if (mknod(path, type | 0600, makedev(major, minor))) {
return -2;
}
return 0;
}