/* * devnodes.c - device inode creation functions * * Erik Troan * Matt Wilson * * 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 #include #include #include #include #include #include #include #include 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 }, { "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 }, { "scd0", 11, 0, 0 }, { "scd1", 11, 1, 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); 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'; /* only 128 SCSI drives, sorry */ if (drive > 128) return -1; else if (drive < 16) major = 8; else major = 64 + (drive) / 16; minor = (drive * 16) % 256; if (num && num[0] && num[1]) minor += (num[0] - '0') * 10 + (num[1] - '0'); else if (num && num[0]) minor += (num[0] - '0'); if (minor > 255) return -1; } else if (devName[0] == 'm' && devName[1] == 'd') { type = S_IFBLK; major = 9; minor = atoi(devName + 2); } else if (!strncmp(devName, "loop", 4)) { type = S_IFBLK; major = 7; minor = atoi(devName + 4); } 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)) { /* IBM Dasd Drives */ type = S_IFBLK; major = 94; minor = ( devName[4] - 'a' ) * 4; if (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, "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 { 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; }