/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2010 Nexenta Systems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "addrem.h" #include "errmsg.h" #include "plcysubr.h" /* * Macros to produce a quoted string containing the value of a * preprocessor macro. For example, if SIZE is defined to be 256, * VAL2STR(SIZE) is "256". This is used to construct format * strings for scanf-family functions below. * Note: For format string use, the argument to VAL2STR() must * be a numeric constant that is one less than the size of the * corresponding data buffer. */ #define VAL2STR_QUOTE(x) #x #define VAL2STR(x) VAL2STR_QUOTE(x) /* * Convenience macro to determine if a character is a quote */ #define isquote(c) (((c) == '"') || ((c) == '\'')) static char *add_rem_lock; /* lock file */ static int add_rem_lock_fd = -1; static int get_cached_n_to_m_file(char *filename, char ***cache); static int get_name_to_major_entry(int *major_no, char *driver_name, char *file_name); static int is_blank(char *); /*ARGSUSED*/ void log_minorperm_error(minorperm_err_t err, int key) { switch (err) { case MP_FOPEN_ERR: (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), MINOR_PERM_FILE); break; case MP_FCLOSE_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); (void) fprintf(stderr, gettext(ERR_NO_MEM)); break; case MP_IGNORING_LINE_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); break; case MP_ALLOC_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); (void) fprintf(stderr, gettext(ERR_NO_MEM)); break; case MP_NVLIST_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); (void) fprintf(stderr, gettext(ERR_NO_MEM)); break; case MP_CANT_FIND_USER_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); break; case MP_CANT_FIND_GROUP_ERR: (void) fprintf(stderr, gettext(ERR_NO_UPDATE), MINOR_PERM_FILE); break; } } /* * open file * for each entry in list * where list entries are separated by * append entry : driver_name entry * close file * return error/noerr */ int append_to_file( char *driver_name, char *entry_list, char *filename, char list_separator, char *entry_separator, int quoted) { int len, line_len; int fpint; char *current_head, *previous_head; char *line, *one_entry; FILE *fp; if ((fp = fopen(filename, "a")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), filename); return (ERROR); } len = strlen(entry_list); one_entry = calloc(len + 1, 1); if (one_entry == NULL) { (void) fprintf(stderr, gettext(ERR_NO_UPDATE), filename); (void) fprintf(stderr, gettext(ERR_NO_MEM)); (void) fclose(fp); return (ERROR); } previous_head = entry_list; line_len = strlen(driver_name) + len + 4; if (quoted) line_len += 2; line = calloc(line_len, 1); if (line == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); (void) fclose(fp); err_exit(); } /* * get one entry at a time from list and append to file */ do { bzero(one_entry, len + 1); bzero(line, line_len); current_head = get_entry(previous_head, one_entry, list_separator, quoted); previous_head = current_head; (void) snprintf(line, line_len, quoted ? "%s%s\"%s\"\n" : "%s%s%s\n", driver_name, entry_separator, one_entry); if ((fputs(line, fp)) == EOF) { perror(NULL); (void) fprintf(stderr, gettext(ERR_NO_UPDATE), filename); } } while (*current_head != '\0'); (void) fflush(fp); fpint = fileno(fp); (void) fsync(fpint); (void) fclose(fp); free(one_entry); free(line); return (NOERR); } /* * open file * for each entry in list * where list entries are separated by * append entry : driver_name entry * close file * return error/noerr */ int append_to_minor_perm( char *driver_name, char *entry_list, char *filename) { int len, line_len; int fpint; char *current_head, *previous_head; char *line, *one_entry; FILE *fp; if ((fp = fopen(filename, "a")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), filename); return (ERROR); } len = strlen(entry_list); one_entry = calloc(len + 1, 1); if (one_entry == NULL) { (void) fprintf(stderr, gettext(ERR_NO_UPDATE), filename); (void) fprintf(stderr, gettext(ERR_NO_MEM)); (void) fclose(fp); return (ERROR); } previous_head = entry_list; line_len = strlen(driver_name) + len + 4; line = calloc(line_len, 1); if (line == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); (void) fclose(fp); err_exit(); } /* * get one entry at a time from list and append to file */ do { bzero(one_entry, len + 1); bzero(line, line_len); current_head = get_perm_entry(previous_head, one_entry); previous_head = current_head; (void) snprintf(line, line_len, "%s:%s\n", driver_name, one_entry); if ((fputs(line, fp)) == EOF) { perror(NULL); (void) fprintf(stderr, gettext(ERR_NO_UPDATE), filename); } } while (*current_head != '\0'); (void) fflush(fp); fpint = fileno(fp); (void) fsync(fpint); (void) fclose(fp); free(one_entry); free(line); return (NOERR); } /* * Require exact match to delete a driver alias/permission entry. * Note line argument does not remain unchanged. Return 1 if matched. */ static int match_entry(char *line, char *match) { char *token, *p; int n; /* skip any leading white space */ while (*line && isspace(*line)) line++; /* * Find separator for driver name, either space or colon * minor_perm: : * driver_aliases: * extra_privs: : */ if ((token = strpbrk(line, " :\t")) == NULL) return (0); token++; /* skip leading white space and quotes */ while (*token && (isspace(*token) || isquote(*token))) token++; /* strip trailing newline, white space and quotes */ n = strlen(token); p = token + n-1; while (n > 0 && (*p == '\n' || isspace(*p) || isquote(*p))) { *p-- = 0; n--; } if (n == 0) return (0); return (strcmp(token, match) == 0); } /* * open file * read thru file, deleting all entries if first * entry = driver_name * close * if error, leave original file intact with message * assumption : drvconfig has been modified to work with clone * entries in /etc/minor_perm as driver:mummble NOT * clone:driver mummble * this implementation will NOT find clone entries * clone:driver mummble * match: * delete just the matching entry * */ int delete_entry( char *oldfile, char *driver_name, char *marker, char *match) { int rv, i; int status = NOERR; int drvr_found = 0; boolean_t nomatch = B_TRUE; char newfile[MAXPATHLEN]; char *cp; char line[MAX_DBFILE_ENTRY]; char drv[FILENAME_MAX + 1]; FILE *fp, *newfp; struct group *sysgrp; int newfd; char *copy; /* same size as line */ char *match2 = NULL; /* match with quotes cleaned up */ /* * if match is specified, sanity check it and clean it * up by removing surrounding quotes as we require * an exact match. */ if (match) { cp = match; while (*cp && (isspace(*cp))) cp++; i = strlen(cp); if (i > 0) { if ((match2 = strdup(cp)) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } i = strlen(match2) - 1; while (i >= 0 && (isspace(match2[i]))) { match2[i] = 0; i--; } } if (match2 == NULL || (strlen(match2) == 0)) { (void) fprintf(stderr, gettext(ERR_INT_UPDATE), oldfile); return (ERROR); } } if ((fp = fopen(oldfile, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), oldfile); return (ERROR); } /* Space for defensive copy of input line */ if ((copy = calloc(sizeof (line), 1)) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } /* Build filename for temporary file */ (void) snprintf(newfile, sizeof (newfile), "%s%s", oldfile, ".hold"); /* * Set gid so we preserve group attribute. Ideally we wouldn't * assume a gid of "sys" but we can't undo the damage on already * installed systems unless we force the issue. */ if ((sysgrp = getgrnam("sys")) != NULL) { (void) setgid(sysgrp->gr_gid); } if ((newfd = open(newfile, O_WRONLY | O_CREAT | O_EXCL, 0644)) < 0) { if (errno == EEXIST) { (void) fprintf(stderr, gettext(ERR_FILE_EXISTS), newfile); return (ERROR); } else { (void) fprintf(stderr, gettext(ERR_CREAT_LOCK), newfile); return (ERROR); } } if ((newfp = fdopen(newfd, "w")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), newfile); (void) close(newfd); return (ERROR); } while ((fgets(line, sizeof (line), fp) != NULL) && status == NOERR) { /* copy the whole line */ if (strlcpy(copy, line, sizeof (line)) >= sizeof (line)) { (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); status = ERROR; break; } /* cut off comments starting with '#' */ if ((cp = strchr(copy, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(copy)) { if (fputs(line, newfp) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); status = ERROR; } continue; } /* get the driver name */ if (sscanf(copy, "%" VAL2STR(FILENAME_MAX) "s", drv) != 1) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), oldfile, line); status = ERROR; break; } for (i = strcspn(drv, marker); i < FILENAME_MAX; i++) { drv[i] = '\0'; } if (strcmp(driver_name, drv) != 0) { if ((fputs(line, newfp)) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); status = ERROR; } } else { drvr_found++; if (match2) { /* Just delete one entry */ /* for now delete just minor_perm and aliases */ if ((strcmp(oldfile, minor_perm) == 0) || (strcmp(oldfile, extra_privs) == 0) || (strcmp(oldfile, driver_aliases) == 0)) { /* make defensive copy */ if (strlcpy(copy, line, sizeof (line)) >= sizeof (line)) { (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); status = ERROR; break; } if (match_entry(copy, match2)) { nomatch = B_FALSE; } else { if ((fputs(line, newfp)) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); status = ERROR; } if (nomatch != B_FALSE) nomatch = B_TRUE; } } } } /* end of else */ } /* end of while */ (void) fclose(fp); free(copy); if (match2) free(match2); /* Make sure that the file is on disk */ if (fflush(newfp) != 0 || fsync(fileno(newfp)) != 0) status = ERROR; else rv = NOERR; (void) fclose(newfp); /* no matching driver found */ rv = NOERR; if (!drvr_found || (nomatch == B_TRUE)) { rv = NONE_FOUND; } /* * if error, leave original file, delete new file * if noerr, replace original file with new file */ if (status == NOERR) { if (rename(newfile, oldfile) == -1) { perror(NULL); (void) fprintf(stderr, gettext(ERR_UPDATE), oldfile); (void) unlink(newfile); return (ERROR); } } else { /* * since there's an error, leave file alone; remove * new file */ if (unlink(newfile) == -1) { (void) fprintf(stderr, gettext(ERR_CANT_RM), newfile); } return (ERROR); } return (rv); } /* * wrapper for call to get_name_to_major_entry(): given driver name, * retrieve major number. */ int get_major_no(char *driver_name, char *file_name) { int major = UNIQUE; if (get_name_to_major_entry(&major, driver_name, file_name) == ERROR) return (ERROR); else return (major); } /* * wrapper for call to get_name_to_major_entry(): given major number, * retrieve driver name. */ int get_driver_name(int major, char *file_name, char *buf) { if (major < 0) return (ERROR); return (get_name_to_major_entry(&major, buf, file_name)); } /* * return pointer to cached name_to_major file - reads file into * cache if this has not already been done. Since there may be * requests for multiple name_to_major files (rem_name_to_major, * name_to_major), this routine keeps a list of cached files. */ static int get_cached_n_to_m_file(char *filename, char ***cache) { struct n_to_m_cache { char *file; char **cached_file; int size; struct n_to_m_cache *next; }; static struct n_to_m_cache *head = NULL; struct n_to_m_cache *ptr; FILE *fp; char drv[FILENAME_MAX + 1]; char entry[FILENAME_MAX + 1]; char line[MAX_N2M_ALIAS_LINE], *cp; int maj; int size = 0; /* * see if the file is already cached - either * rem_name_to_major or name_to_major */ ptr = head; while (ptr != NULL) { if (strcmp(ptr->file, filename) == 0) break; ptr = ptr->next; } if (ptr == NULL) { /* we need to cache the contents */ if ((fp = fopen(filename, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_OPEN), filename); return (ERROR); } while (fgets(line, sizeof (line), fp) != NULL) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s" /* drv */ "%" VAL2STR(FILENAME_MAX) "s", /* entry */ drv, entry) != 2) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), filename, line); continue; } maj = atoi(entry); if (maj > size) size = maj; } /* allocate struct to cache the file */ ptr = (struct n_to_m_cache *)calloc(1, sizeof (struct n_to_m_cache)); if (ptr == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } ptr->size = size + 1; /* allocate space to cache contents of file */ ptr->cached_file = (char **)calloc(ptr->size, sizeof (char *)); if (ptr->cached_file == NULL) { free(ptr); (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } rewind(fp); /* * now fill the cache * the cache is an array of char pointers indexed by major * number */ while (fgets(line, sizeof (line), fp) != NULL) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s" /* drv */ "%" VAL2STR(FILENAME_MAX) "s", /* entry */ drv, entry) != 2) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), filename, line); continue; } maj = atoi(entry); if ((ptr->cached_file[maj] = strdup(drv)) == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); free(ptr->cached_file); free(ptr); return (ERROR); } (void) strcpy(ptr->cached_file[maj], drv); } (void) fclose(fp); /* link the cache struct into the list of cached files */ ptr->file = strdup(filename); if (ptr->file == NULL) { for (maj = 0; maj <= ptr->size; maj++) free(ptr->cached_file[maj]); free(ptr->cached_file); free(ptr); (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } ptr->next = head; head = ptr; } /* return value pointer to contents of file */ *cache = ptr->cached_file; /* return size */ return (ptr->size); } /* * Using get_cached_n_to_m_file(), retrieve maximum major number * found in the specificed file (name_to_major/rem_name_to_major). * * The return value is actually the size of the internal cache including 0. */ int get_max_major(char *file_name) { char **n_to_m_cache = NULL; return (get_cached_n_to_m_file(file_name, &n_to_m_cache)); } /* * searching name_to_major: if major_no == UNIQUE then the caller wants to * use the driver name as the key. Otherwise, the caller wants to use * the major number as a key. * * This routine caches the contents of the name_to_major file on * first call. And it could be generalized to deal with other * config files if necessary. */ static int get_name_to_major_entry(int *major_no, char *driver_name, char *file_name) { int maj; char **n_to_m_cache = NULL; int size = 0; int ret = NOT_UNIQUE; /* * read the file in - we cache it in case caller wants to * do multiple lookups */ size = get_cached_n_to_m_file(file_name, &n_to_m_cache); if (size == ERROR) return (ERROR); /* search with driver name as key */ if (*major_no == UNIQUE) { for (maj = 0; maj < size; maj++) { if ((n_to_m_cache[maj] != NULL) && (strcmp(driver_name, n_to_m_cache[maj]) == 0)) { *major_no = maj; break; } } if (maj >= size) ret = UNIQUE; /* search with major number as key */ } else { /* * Bugid 1254588, drvconfig dump core after loading driver * with major number bigger than entries defined in * /etc/name_to_major. */ if (*major_no >= size) return (UNIQUE); if (n_to_m_cache[*major_no] != NULL) { (void) strcpy(driver_name, n_to_m_cache[*major_no]); } else ret = UNIQUE; } return (ret); } /* * Given pointer to begining of member 'n' in a space (or separator) * separated list, return pointer to member 'n+1', and establish member 'n' * in *current_entry. If unquote, then we skip a leading quote and treat * the trailing quote as a separator (and skip). */ char * get_entry( char *prev_member, char *current_entry, char separator, int unquote) { char *ptr; int quoted = 0; ptr = prev_member; /* skip white space */ while (isspace(*ptr)) ptr++; /* if unquote skip leading quote */ if (unquote && *ptr == '"') { quoted++; ptr++; } /* read thru the current entry looking for end, separator, or unquote */ while (*ptr && (*ptr != separator) && (!isspace(*ptr)) && (!quoted || (*ptr != '"'))) { *current_entry++ = *ptr++; } *current_entry = '\0'; if (separator && (*ptr == separator)) ptr++; /* skip over separator */ if (quoted && (*ptr == '"')) ptr++; /* skip over trailing quote */ /* skip white space */ while (isspace(*ptr)) ptr++; return (ptr); } /* * A parser specific to the add_drv "-m permission" syntax: * * -m ' ', ... * * One entry is parsed starting at prev_member and returned * in the string pointed at by current_entry. A pointer * to the entry following is returned. */ char * get_perm_entry( char *prev_member, char *current_entry) { char *ptr; int nfields = 0; int maxfields = 4; /* fields in a permissions format */ ptr = prev_member; while (isspace(*ptr)) ptr++; while (*ptr) { /* comma allowed in minor name token only */ if (*ptr == ',' && nfields > 0) { break; } else if (isspace(*ptr)) { *current_entry++ = *ptr++; while (isspace(*ptr)) ptr++; if (++nfields == maxfields) break; } else *current_entry++ = *ptr++; } *current_entry = '\0'; while (isspace(*ptr)) ptr++; if (*ptr == ',') { ptr++; /* skip over optional trailing comma */ } while (isspace(*ptr)) ptr++; return (ptr); } void enter_lock(void) { struct flock lock; /* * Attempt to create the lock file. Open the file itself, * and not a symlink to some other file. */ add_rem_lock_fd = open(add_rem_lock, O_CREAT|O_RDWR|O_NOFOLLOW|O_NOLINKS, S_IRUSR|S_IWUSR); if (add_rem_lock_fd < 0) { (void) fprintf(stderr, gettext(ERR_CREAT_LOCK), add_rem_lock, strerror(errno)); exit(1); } lock.l_type = F_WRLCK; lock.l_whence = SEEK_SET; lock.l_start = 0; lock.l_len = 0; /* Try for the lock but don't wait. */ if (fcntl(add_rem_lock_fd, F_SETLK, &lock) == -1) { if (errno == EACCES || errno == EAGAIN) { (void) fprintf(stderr, gettext(ERR_PROG_IN_USE)); } else { (void) fprintf(stderr, gettext(ERR_LOCK), add_rem_lock, strerror(errno)); } exit(1); } } void err_exit(void) { /* release memory allocated for moddir */ cleanup_moddir(); /* remove add_drv/rem_drv lock */ exit_unlock(); exit(1); } void cleanup_moddir(void) { struct drvmod_dir *walk_ptr; struct drvmod_dir *free_ptr = moddir; while (free_ptr != NULL) { walk_ptr = free_ptr->next; free(free_ptr); free_ptr = walk_ptr; } } void exit_unlock(void) { struct flock unlock; if (add_rem_lock_fd < 0) return; unlock.l_type = F_UNLCK; unlock.l_whence = SEEK_SET; unlock.l_start = 0; unlock.l_len = 0; if (fcntl(add_rem_lock_fd, F_SETLK, &unlock) == -1) { (void) fprintf(stderr, gettext(ERR_UNLOCK), add_rem_lock, strerror(errno)); } else { (void) close(add_rem_lock_fd); add_rem_lock_fd = -1; } } /* * error adding driver; need to back out any changes to files. * check flag to see which files need entries removed * entry removal based on driver name */ void remove_entry( int c_flag, char *driver_name) { if (c_flag & CLEAN_NAM_MAJ) { if (delete_entry(name_to_major, driver_name, " ", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_NO_CLEAN), name_to_major, driver_name); } } if (c_flag & CLEAN_DRV_ALIAS) { if (delete_entry(driver_aliases, driver_name, " ", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, driver_aliases); } } if (c_flag & CLEAN_DRV_CLASSES) { if (delete_entry(driver_classes, driver_name, "\t", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, driver_classes); } } if (c_flag & CLEAN_MINOR_PERM) { if (delete_entry(minor_perm, driver_name, ":", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, minor_perm); } } /* * There's no point in removing entries from files that don't * exist. Prevent error messages by checking for file existence * first. */ if ((c_flag & CLEAN_DEV_POLICY) != 0 && access(device_policy, F_OK) == 0) { if (delete_plcy_entry(device_policy, driver_name) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, device_policy); } } if ((c_flag & CLEAN_DRV_PRIV) != 0 && access(extra_privs, F_OK) == 0) { if (delete_entry(extra_privs, driver_name, ":", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, extra_privs); } } } int check_perms_aliases( int m_flag, int i_flag) { /* * If neither i_flag nor m_flag are specified no need to check the * files for access permissions */ if (!m_flag && !i_flag) return (NOERR); /* check minor_perm file : exits and is writable */ if (m_flag) { if (access(minor_perm, R_OK | W_OK)) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), minor_perm); return (ERROR); } } /* check driver_aliases file : exits and is writable */ if (i_flag) { if (access(driver_aliases, R_OK | W_OK)) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), driver_aliases); return (ERROR); } } return (NOERR); } int check_name_to_major(int mode) { /* check name_to_major file : exists and is writable */ if (access(name_to_major, mode)) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), name_to_major); return (ERROR); } return (NOERR); } /* * All this stuff is to support a server installing * drivers on diskless clients. When on the server * need to prepend the basedir */ int build_filenames(char *basedir) { int len; int driver_aliases_len; int driver_classes_len; int minor_perm_len; int name_to_major_len; int rem_name_to_major_len; int add_rem_lock_len; int devfs_root_len; int device_policy_len; int extra_privs_len; if (basedir == NULL) { driver_aliases = DRIVER_ALIAS; driver_classes = DRIVER_CLASSES; minor_perm = MINOR_PERM; name_to_major = NAM_TO_MAJ; rem_name_to_major = REM_NAM_TO_MAJ; add_rem_lock = ADD_REM_LOCK; devfs_root = DEVFS_ROOT; device_policy = DEV_POLICY; extra_privs = EXTRA_PRIVS; } else { len = strlen(basedir) + 1; driver_aliases_len = len + sizeof (DRIVER_ALIAS); driver_classes_len = len + sizeof (DRIVER_CLASSES); minor_perm_len = len + sizeof (MINOR_PERM); name_to_major_len = len + sizeof (NAM_TO_MAJ); rem_name_to_major_len = len + sizeof (REM_NAM_TO_MAJ); add_rem_lock_len = len + sizeof (ADD_REM_LOCK); devfs_root_len = len + sizeof (DEVFS_ROOT); device_policy_len = len + sizeof (DEV_POLICY); extra_privs_len = len + sizeof (EXTRA_PRIVS); driver_aliases = malloc(driver_aliases_len); driver_classes = malloc(driver_classes_len); minor_perm = malloc(minor_perm_len); name_to_major = malloc(name_to_major_len); rem_name_to_major = malloc(rem_name_to_major_len); add_rem_lock = malloc(add_rem_lock_len); devfs_root = malloc(devfs_root_len); device_policy = malloc(device_policy_len); extra_privs = malloc(extra_privs_len); if ((driver_aliases == NULL) || (driver_classes == NULL) || (minor_perm == NULL) || (name_to_major == NULL) || (rem_name_to_major == NULL) || (add_rem_lock == NULL) || (devfs_root == NULL) || (device_policy == NULL) || (extra_privs == NULL)) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } (void) snprintf(driver_aliases, driver_aliases_len, "%s%s", basedir, DRIVER_ALIAS); (void) snprintf(driver_classes, driver_classes_len, "%s%s", basedir, DRIVER_CLASSES); (void) snprintf(minor_perm, minor_perm_len, "%s%s", basedir, MINOR_PERM); (void) snprintf(name_to_major, name_to_major_len, "%s%s", basedir, NAM_TO_MAJ); (void) snprintf(rem_name_to_major, rem_name_to_major_len, "%s%s", basedir, REM_NAM_TO_MAJ); (void) snprintf(add_rem_lock, add_rem_lock_len, "%s%s", basedir, ADD_REM_LOCK); (void) snprintf(devfs_root, devfs_root_len, "%s%s", basedir, DEVFS_ROOT); (void) snprintf(device_policy, device_policy_len, "%s%s", basedir, DEV_POLICY); (void) snprintf(extra_privs, extra_privs_len, "%s%s", basedir, EXTRA_PRIVS); } return (NOERR); } static int exec_command(char *path, char *cmdline[MAX_CMD_LINE]) { pid_t pid; uint_t stat_loc; int waitstat; int exit_status; /* child */ if ((pid = fork()) == 0) { (void) execv(path, cmdline); perror(NULL); return (ERROR); } else if (pid == -1) { /* fork failed */ perror(NULL); (void) fprintf(stderr, gettext(ERR_FORK_FAIL), cmdline); return (ERROR); } else { /* parent */ do { waitstat = waitpid(pid, (int *)&stat_loc, 0); } while ((!WIFEXITED(stat_loc) && !WIFSIGNALED(stat_loc)) || (waitstat == 0)); exit_status = WEXITSTATUS(stat_loc); return (exit_status); } } /* * Exec devfsadm to perform driver config/unconfig operation, * adding or removing aliases. */ static int exec_devfsadm( boolean_t config, char *driver_name, major_t major_num, char *aliases, char *classes, int config_flags) { int n = 0; char *cmdline[MAX_CMD_LINE]; char maj_num[128]; char *previous; char *current; int len; int rv; /* build command line */ cmdline[n++] = DRVCONFIG; if (config == B_FALSE) { cmdline[n++] = "-u"; /* unconfigure */ if (config_flags & CONFIG_DRV_FORCE) cmdline[n++] = "-f"; /* force if currently in use */ } if (config_flags & CONFIG_DRV_VERBOSE) { cmdline[n++] = "-v"; } cmdline[n++] = "-b"; if (classes) { cmdline[n++] = "-c"; cmdline[n++] = classes; } cmdline[n++] = "-i"; cmdline[n++] = driver_name; cmdline[n++] = "-m"; (void) snprintf(maj_num, sizeof (maj_num), "%lu", major_num); cmdline[n++] = maj_num; if (config_flags & CONFIG_DRV_UPDATE_ONLY) cmdline[n++] = "-x"; if (aliases != NULL) { len = strlen(aliases); previous = aliases; do { cmdline[n++] = "-a"; cmdline[n] = calloc(len + 1, 1); if (cmdline[n] == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } current = get_entry(previous, cmdline[n++], ' ', 0); previous = current; } while (*current != '\0'); } cmdline[n] = (char *)0; rv = exec_command(DRVCONFIG_PATH, cmdline); if (rv == NOERR) return (NOERR); return (ERROR); } int unconfig_driver( char *driver_name, major_t major_num, char *aliases, int config_flags) { return (exec_devfsadm(B_FALSE, driver_name, major_num, aliases, NULL, config_flags)); } /* * check that major_num doesn't exceed maximum on this machine * do this here to support add_drv on server for diskless clients */ int config_driver( char *driver_name, major_t major_num, char *aliases, char *classes, int cleanup_flag, int config_flags) { int max_dev; int rv; if (modctl(MODRESERVED, NULL, &max_dev) < 0) { perror(NULL); (void) fprintf(stderr, gettext(ERR_MAX_MAJOR)); return (ERROR); } if (major_num >= max_dev) { (void) fprintf(stderr, gettext(ERR_MAX_EXCEEDS), major_num, max_dev); return (ERROR); } /* bind major number and driver name */ rv = exec_devfsadm(B_TRUE, driver_name, major_num, aliases, classes, config_flags); if (rv == NOERR) return (NOERR); perror(NULL); remove_entry(cleanup_flag, driver_name); return (ERROR); } void load_driver(char *driver_name, int verbose_flag) { int n = 0; char *cmdline[MAX_CMD_LINE]; int exec_status; /* build command line */ cmdline[n++] = DEVFSADM; if (verbose_flag) { cmdline[n++] = "-v"; } cmdline[n++] = "-i"; cmdline[n++] = driver_name; cmdline[n] = (char *)0; exec_status = exec_command(DEVFSADM_PATH, cmdline); if (exec_status != NOERR) { /* no clean : name and major number are bound */ (void) fprintf(stderr, gettext(ERR_CONFIG), driver_name); } } void get_modid(char *driver_name, int *mod) { struct modinfo modinfo; modinfo.mi_id = -1; modinfo.mi_info = MI_INFO_ALL; do { /* * If we are at the end of the list of loaded modules * then set *mod = -1 and return */ if (modctl(MODINFO, 0, &modinfo) < 0) { *mod = -1; return; } *mod = modinfo.mi_id; } while (strcmp(driver_name, modinfo.mi_name) != 0); } int create_reconfig(char *basedir) { char reconfig_file[MAXPATHLEN + FILENAME_MAX + 1]; FILE *reconfig_fp; if (basedir != NULL) { (void) strcpy(reconfig_file, basedir); (void) strcat(reconfig_file, RECONFIGURE); } else { (void) strcpy(reconfig_file, RECONFIGURE); } if ((reconfig_fp = fopen(reconfig_file, "a")) == NULL) return (ERROR); (void) fclose(reconfig_fp); return (NOERR); } /* * update_minor_entry: * open file * for each entry in list * where list entries are separated by * modify entry : driver_name entry * close file * * return error/noerr */ int update_minor_entry(char *driver_name, char *perm_list) { FILE *fp; FILE *newfp; int match = 0; char line[MAX_DBFILE_ENTRY]; char drv[FILENAME_MAX + 1]; char minor[FILENAME_MAX + 1]; char perm[OPT_LEN + 1]; char own[OPT_LEN + 1]; char grp[OPT_LEN + 1]; int status = NOERR, i; char newfile[MAXPATHLEN]; char *cp, *dup, *drv_minor; struct group *sysgrp; int newfd; if ((fp = fopen(minor_perm, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), minor_perm); return (ERROR); } /* Build filename for temporary file */ (void) snprintf(newfile, sizeof (newfile), "%s%s", minor_perm, ".hold"); /* * Set gid so we preserve group attribute. Ideally we wouldn't * assume a gid of "sys" but we can't undo the damage on already * installed systems unless we force the issue. */ if ((sysgrp = getgrnam("sys")) != NULL) { (void) setgid(sysgrp->gr_gid); } if ((newfd = open(newfile, O_WRONLY | O_CREAT | O_EXCL, 0644)) < 0) { if (errno == EEXIST) { (void) fprintf(stderr, gettext(ERR_FILE_EXISTS), newfile); return (ERROR); } else { (void) fprintf(stderr, gettext(ERR_CREAT_LOCK), newfile); return (ERROR); } } if ((newfp = fdopen(newfd, "w")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), newfile); (void) close(newfd); return (ERROR); } if (sscanf(perm_list, "%" VAL2STR(FILENAME_MAX) "s" /* minor */ "%" VAL2STR(OPT_LEN) "s" /* perm */ "%" VAL2STR(OPT_LEN) "s" /* own */ "%" VAL2STR(OPT_LEN) "s", /* grp */ minor, perm, own, grp) != 4) { status = ERROR; } while ((fgets(line, sizeof (line), fp) != NULL) && status == NOERR) { /* copy the whole line into dup */ if ((dup = strdup(line)) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_NO_MEM)); status = ERROR; break; } /* cut off comments starting with '#' */ if ((cp = strchr(dup, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(dup)) { if (fputs(line, newfp) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), minor_perm); status = ERROR; } free(dup); continue; } /* get the driver name */ if (sscanf(dup, "%" VAL2STR(FILENAME_MAX) "s", drv) != 1) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), minor_perm, line); status = ERROR; free(dup); break; } /* * get the minor name; place the NULL character at the * end of the driver name, then make the drv_minor * point to the first character of the minor name. * the line missing ':' must be treated as a broken one. */ i = strcspn(drv, ":"); if (i == strlen(drv)) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), minor_perm, line); status = ERROR; free(dup); break; } drv[i] = '\0'; drv_minor = &drv[strlen(drv) + 1]; /* * compare both of the driver name and the minor name. * then the new line should be written to the file if * both of them match */ if ((strcmp(drv, driver_name) == 0) && (strcmp(minor, drv_minor) == 0)) { /* if it has a comment, keep it */ if (cp != NULL) { cp++; /* skip a terminator */ (void) snprintf(line, sizeof (line), "%s:%s %s %s %s #%s\n", drv, minor, perm, own, grp, cp); } else { (void) snprintf(line, sizeof (line), "%s:%s %s %s %s\n", drv, minor, perm, own, grp); } match = 1; } free(dup); /* update the file */ if ((fputs(line, newfp)) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), minor_perm); status = ERROR; } } if (!match) { (void) bzero(line, sizeof (&line[0])); (void) snprintf(line, sizeof (line), "%s:%s %s %s %s\n", driver_name, minor, perm, own, grp); /* add the new entry */ if ((fputs(line, newfp)) == EOF) { (void) fprintf(stderr, gettext(ERR_UPDATE), minor_perm); status = ERROR; } } (void) fclose(fp); if (fflush(newfp) != 0 || fsync(fileno(newfp)) != 0) status = ERROR; (void) fclose(newfp); /* * if error, leave original file, delete new file * if noerr, replace original file with new file */ if (status == NOERR) { if (rename(newfile, minor_perm) == -1) { perror(NULL); (void) fprintf(stderr, gettext(ERR_UPDATE), minor_perm); (void) unlink(newfile); return (ERROR); } } else { /* * since there's an error, leave file alone; remove * new file */ if (unlink(newfile) == -1) { (void) fprintf(stderr, gettext(ERR_CANT_RM), newfile); } return (ERROR); } return (NOERR); } /* * list_entry: * open file * read thru file, listing all entries if first entry = driver_name * close */ void list_entry( char *oldfile, char *driver_name, char *marker) { FILE *fp; int i; char line[MAX_DBFILE_ENTRY], *cp; char drv[FILENAME_MAX + 1]; if ((fp = fopen(oldfile, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), oldfile); return; } while (fgets(line, sizeof (line), fp) != NULL) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s", drv) != 1) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), oldfile, line); } for (i = strcspn(drv, marker); i < FILENAME_MAX; i++) { drv[i] = '\0'; } if (strcmp(driver_name, drv) == 0) { (void) fprintf(stdout, "%s", line); } } (void) fclose(fp); } static boolean_t is_token(char *tok) { /* * Check the token here. According to IEEE1275 Open Firmware Boot * Standard, the name is composed of 1 to 31 letters, * digits and punctuation characters from the set ",._+-", and * uppercase and lowercase characters are considered distinct. * (ie. token := [a-zA-Z0-9,._+-]+, length(token) <= 31) * However, since either the definition of driver or aliase names is * not known well, only '#' is avoided explicitly. (the kernel lexical * analyzer treats it as a start of a comment) */ for (/* nothing */; *tok != '\0'; tok++) if (*tok == '#' || iscntrl(*tok)) return (B_FALSE); return (B_TRUE); } /* * check each entry in perm_list for: * 4 arguments * permission arg is in valid range * permlist entries separated by comma * return ERROR/NOERR */ int check_perm_opts(char *perm_list) { char *current_head; char *previous_head; char *one_entry; int len, scan_stat; char minor[FILENAME_MAX + 1]; char perm[OPT_LEN + 1]; char own[OPT_LEN + 1]; char grp[OPT_LEN + 1]; char dumb[OPT_LEN + 1]; int status = NOERR; int intperm; if ((len = strlen(perm_list)) == 0) return (ERROR); if ((one_entry = calloc(len + 1, 1)) == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } previous_head = perm_list; current_head = perm_list; while (*current_head != '\0') { bzero(one_entry, len + 1); current_head = get_perm_entry(previous_head, one_entry); previous_head = current_head; scan_stat = sscanf(one_entry, "%" VAL2STR(FILENAME_MAX) "s" /* minor */ "%" VAL2STR(OPT_LEN) "s" /* perm */ "%" VAL2STR(OPT_LEN) "s" /* own */ "%" VAL2STR(OPT_LEN) "s" /* grp */ "%" VAL2STR(OPT_LEN) "s", /* dumb */ minor, perm, own, grp, dumb); if (scan_stat < 4) { (void) fprintf(stderr, gettext(ERR_MIS_TOK), "-m", one_entry); status = ERROR; } if (scan_stat > 4) { (void) fprintf(stderr, gettext(ERR_TOO_MANY_ARGS), "-m", one_entry); status = ERROR; } intperm = atoi(perm); if (intperm < 0000 || intperm > 4777) { (void) fprintf(stderr, gettext(ERR_BAD_MODE), perm); status = ERROR; } } free(one_entry); return (status); } /* * check each alias : * alias list members separated by white space * cannot exist as driver name in /etc/name_to_major * cannot exist as driver or alias name in /etc/driver_aliases */ int aliases_unique(char *aliases) { char *current_head; char *previous_head; char *one_entry; int len; int is_unique; int err; len = strlen(aliases); one_entry = calloc(len + 1, 1); if (one_entry == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } previous_head = aliases; do { bzero(one_entry, len+1); current_head = get_entry(previous_head, one_entry, ' ', 1); previous_head = current_head; if ((unique_driver_name(one_entry, name_to_major, &is_unique)) == ERROR) goto err_out; if (is_unique != UNIQUE) { (void) fprintf(stderr, gettext(ERR_ALIAS_IN_NAM_MAJ), one_entry); goto err_out; } if ((err = unique_drv_alias(one_entry)) != UNIQUE) { if (err == NOT_UNIQUE) { (void) fprintf(stderr, gettext(ERR_ALIAS_IN_USE), one_entry); } goto err_out; } if (!is_token(one_entry)) { (void) fprintf(stderr, gettext(ERR_BAD_TOK), "-i", one_entry); goto err_out; } } while (*current_head != '\0'); free(one_entry); return (NOERR); err_out: free(one_entry); return (ERROR); } /* * verify each alias : * alias list members separated by white space and quoted * exist as alias name in /etc/driver_aliases */ int aliases_exist(char *aliases) { char *current_head; char *previous_head; char *one_entry; int len; len = strlen(aliases); one_entry = calloc(len + 1, 1); if (one_entry == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } previous_head = aliases; do { bzero(one_entry, len+1); current_head = get_entry(previous_head, one_entry, ' ', 1); previous_head = current_head; if (unique_drv_alias(one_entry) != NOT_UNIQUE) goto err_out; if (!is_token(one_entry)) { (void) fprintf(stderr, gettext(ERR_BAD_TOK), "-i", one_entry); goto err_out; } } while (*current_head != '\0'); free(one_entry); return (NOERR); err_out: free(one_entry); return (ERROR); } /* * check each alias : * if path-oriented alias, path exists */ int aliases_paths_exist(char *aliases) { char *current_head; char *previous_head; char *one_entry; int i, len; char path[MAXPATHLEN]; struct stat buf; len = strlen(aliases); one_entry = calloc(len + 1, 1); if (one_entry == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } previous_head = aliases; do { for (i = 0; i <= len; i++) one_entry[i] = 0; current_head = get_entry(previous_head, one_entry, ' ', 1); previous_head = current_head; /* if the alias is a path, ensure that the path exists */ if (*one_entry != '/') continue; (void) snprintf(path, sizeof (path), "/devices/%s", one_entry); if (stat(path, &buf) == 0) continue; /* no device at specified path-oriented alias path */ (void) fprintf(stderr, gettext(ERR_PATH_ORIENTED_ALIAS), one_entry); free(one_entry); return (ERROR); } while (*current_head != '\0'); free(one_entry); return (NOERR); } int update_driver_aliases( char *driver_name, char *aliases) { /* make call to update the aliases file */ return (append_to_file(driver_name, aliases, driver_aliases, ' ', " ", 1)); } /* * Return: * ERROR in case of memory or read error * UNIQUE if there is no existing match to the supplied alias * NOT_UNIQUE if there is a match * An error message is emitted in the case of ERROR, * up to the caller otherwise. */ int unique_drv_alias(char *drv_alias) { FILE *fp; char drv[FILENAME_MAX + 1]; char line[MAX_N2M_ALIAS_LINE + 1], *cp; char alias[FILENAME_MAX + 1]; char *a; int status = UNIQUE; fp = fopen(driver_aliases, "r"); if (fp != NULL) { while ((fgets(line, sizeof (line), fp) != 0) && status == UNIQUE) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s" /* drv */ "%" VAL2STR(FILENAME_MAX) "s", /* alias */ drv, alias) != 2) (void) fprintf(stderr, gettext(ERR_BAD_LINE), driver_aliases, line); /* unquote for compare */ if ((*alias == '"') && (*(alias + strlen(alias) - 1) == '"')) { a = &alias[1]; alias[strlen(alias) - 1] = '\0'; } else a = alias; if ((strcmp(drv_alias, drv) == 0) || (strcmp(drv_alias, a) == 0)) { status = NOT_UNIQUE; break; } } (void) fclose(fp); return (status); } else { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_OPEN), driver_aliases); return (ERROR); } } /* * search for driver_name in first field of file file_name * searching name_to_major and driver_aliases: name separated * from the remainder of the line by white space. */ int unique_driver_name(char *driver_name, char *file_name, int *is_unique) { int ret, err; if ((ret = get_major_no(driver_name, file_name)) == ERROR) { (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), file_name); } else { /* check alias file for name collision */ if ((err = unique_drv_alias(driver_name)) != UNIQUE) { if (err == NOT_UNIQUE) { (void) fprintf(stderr, gettext(ERR_ALIAS_IN_USE), driver_name); } ret = ERROR; } else { if (ret != UNIQUE) *is_unique = NOT_UNIQUE; else *is_unique = ret; ret = NOERR; } } return (ret); } /* * returns: * SUCCESS - not an existing driver alias * NOT_UNIQUE - matching driver alias exists * ERROR - an error occurred */ int check_duplicate_driver_alias(char *driver_name, char *drv_alias) { FILE *fp; char drv[FILENAME_MAX + 1]; char line[MAX_N2M_ALIAS_LINE + 1], *cp; char alias[FILENAME_MAX + 1]; char *a; int status = SUCCESS; if ((fp = fopen(driver_aliases, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_OPEN), driver_aliases); return (ERROR); } while (fgets(line, sizeof (line), fp) != 0) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s" /* drv */ "%" VAL2STR(FILENAME_MAX) "s", /* alias */ drv, alias) != 2) (void) fprintf(stderr, gettext(ERR_BAD_LINE), driver_aliases, line); /* unquote for compare */ if ((*alias == '"') && (*(alias + strlen(alias) - 1) == '"')) { a = &alias[1]; alias[strlen(alias) - 1] = '\0'; } else a = alias; if ((strcmp(drv_alias, a) == 0) && (strcmp(drv, driver_name) == 0)) { status = NOT_UNIQUE; } if ((strcmp(drv_alias, drv) == 0) || ((strcmp(drv_alias, a) == 0) && (strcmp(drv, driver_name) != 0))) { (void) fprintf(stderr, gettext(ERR_ALIAS_IN_USE), drv_alias); status = ERROR; goto done; } } done: (void) fclose(fp); return (status); } int trim_duplicate_aliases(char *driver_name, char *aliases, char **aliases2p) { char *current_head; char *previous_head; char *one_entry; char *aliases2; int rv, len; int n = 0; *aliases2p = NULL; len = strlen(aliases) + 1; one_entry = calloc(len, 1); aliases2 = calloc(len, 1); if (one_entry == NULL || aliases2 == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } previous_head = aliases; do { (void) bzero(one_entry, len); current_head = get_entry(previous_head, one_entry, ' ', 1); previous_head = current_head; rv = check_duplicate_driver_alias(driver_name, one_entry); switch (rv) { case SUCCESS: /* not an existing driver alias: add it */ if (n > 0) { if (strlcat(aliases2, " ", len) >= len) goto err; } if (strlcat(aliases2, one_entry, len) >= len) goto err; n++; break; case NOT_UNIQUE: /* matching driver alias exists: do not add it */ break; case ERROR: /* error reading the alias file */ goto err; default: goto err; } if (!is_token(one_entry)) { (void) fprintf(stderr, gettext(ERR_BAD_TOK), "-i", one_entry); goto err; } } while (*current_head != '\0'); /* * If all the aliases listed are already * present we actually have none to do. */ if (n == 0) { free(aliases2); } else { *aliases2p = aliases2; } free(one_entry); return (NOERR); err: free(aliases2); free(one_entry); return (ERROR); } int check_space_within_quote(char *str) { register int i; register int len; int quoted = 0; len = strlen(str); for (i = 0; i < len; i++, str++) { if (*str == '"') { if (quoted == 0) quoted++; else quoted--; } else if (*str == ' ' && quoted) return (ERROR); } return (0); } /* * get major number * write driver_name major_num to name_to_major file * major_num returned in major_num * return success/failure */ int update_name_to_major(char *driver_name, major_t *major_num, int server) { char major[MAX_STR_MAJOR + 1]; struct stat buf; char *num_list; char drv_majnum_str[MAX_STR_MAJOR + 1]; int new_maj = -1; int i, tmp = 0, is_unique, have_rem_n2m = 0; int max_dev = 0; /* * if driver_name already in rem_name_to_major * delete entry from rem_nam_to_major * put entry into name_to_major */ if (stat(rem_name_to_major, &buf) == 0) { have_rem_n2m = 1; } if (have_rem_n2m) { if ((is_unique = get_major_no(driver_name, rem_name_to_major)) == ERROR) return (ERROR); /* * found a match in rem_name_to_major */ if (is_unique != UNIQUE) { char scratch[FILENAME_MAX]; /* * If there is a match in /etc/rem_name_to_major then * be paranoid: is that major number already in * /etc/name_to_major (potentially under another name)? */ if (get_driver_name(is_unique, name_to_major, scratch) != UNIQUE) { /* * nuke the rem_name_to_major entry-- it * isn't helpful. */ (void) delete_entry(rem_name_to_major, driver_name, " ", NULL); } else { (void) snprintf(major, sizeof (major), "%d", is_unique); if (append_to_file(driver_name, major, name_to_major, ' ', " ", 0) == ERROR) { (void) fprintf(stderr, gettext(ERR_NO_UPDATE), name_to_major); return (ERROR); } if (delete_entry(rem_name_to_major, driver_name, " ", NULL) == ERROR) { (void) fprintf(stderr, gettext(ERR_DEL_ENTRY), driver_name, rem_name_to_major); return (ERROR); } /* found matching entry : no errors */ *major_num = is_unique; return (NOERR); } } } /* * Bugid: 1264079 * In a server case (with -b option), we can't use modctl() to find * the maximum major number, we need to dig thru client's * /etc/name_to_major and /etc/rem_name_to_major for the max_dev. * * if (server) * get maximum major number thru (rem_)name_to_major file on client * else * get maximum major number allowable on current system using modctl */ if (server) { max_dev = 0; tmp = 0; max_dev = get_max_major(name_to_major); /* If rem_name_to_major exists, we need to check it too */ if (have_rem_n2m) { tmp = get_max_major(rem_name_to_major); /* * If name_to_major is missing, we can get max_dev from * /etc/rem_name_to_major. If both missing, bail out! */ if ((max_dev == ERROR) && (tmp == ERROR)) { (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), name_to_major); return (ERROR); } /* guard against bigger maj_num in rem_name_to_major */ if (tmp > max_dev) max_dev = tmp; } else { /* * If we can't get major from name_to_major file * and there is no /etc/rem_name_to_major file, * then we don't have a max_dev, bail out quick! */ if (max_dev == ERROR) return (ERROR); } /* * In case there is no more slack in current name_to_major * table, provide at least 1 extra entry so the add_drv can * succeed. Since only one add_drv process is allowed at one * time, and hence max_dev will be re-calculated each time * add_drv is ran, we don't need to worry about adding more * than 1 extra slot for max_dev. */ max_dev++; } else { if (modctl(MODRESERVED, NULL, &max_dev) < 0) { perror(NULL); (void) fprintf(stderr, gettext(ERR_MAX_MAJOR)); return (ERROR); } } /* * max_dev is really how many slots the kernel has allocated for * devices... [0 , maxdev-1], not the largest available device num. */ if ((num_list = calloc(max_dev, 1)) == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } /* * Populate the num_list array */ if (fill_n2m_array(name_to_major, &num_list, &max_dev) != 0) { return (ERROR); } if (have_rem_n2m) { if (fill_n2m_array(rem_name_to_major, &num_list, &max_dev) != 0) return (ERROR); } /* * Find the first free major number. * * Note that we begin searching from 1, as drivers have developer the * erroneous assumption that a dev_t of 0 is invalid, and since we no * longer include system devices in the base files, a major number of * 0 may now be given to arbitrary devices. */ for (i = 1; i < max_dev; i++) { if (num_list[i] != 1) { new_maj = i; break; } } if (new_maj == -1) { (void) fprintf(stderr, gettext(ERR_NO_FREE_MAJOR)); return (ERROR); } (void) snprintf(drv_majnum_str, sizeof (drv_majnum_str), "%d", new_maj); if (do_the_update(driver_name, drv_majnum_str) == ERROR) { return (ERROR); } *major_num = new_maj; return (NOERR); } int fill_n2m_array(char *filename, char **array, int *nelems) { FILE *fp; char line[MAX_N2M_ALIAS_LINE + 1], *cp; char drv[FILENAME_MAX + 1]; u_longlong_t dnum; major_t drv_majnum; /* * Read through the file, marking each major number found * order is not relevant */ if ((fp = fopen(filename, "r")) == NULL) { perror(NULL); (void) fprintf(stderr, gettext(ERR_CANT_ACCESS_FILE), filename); return (ERROR); } while (fgets(line, sizeof (line), fp) != 0) { /* cut off comments starting with '#' */ if ((cp = strchr(line, '#')) != NULL) *cp = '\0'; /* ignore comment or blank lines */ if (is_blank(line)) continue; /* sanity-check */ if (sscanf(line, "%" VAL2STR(FILENAME_MAX) "s %llu", drv, &dnum) != 2) { (void) fprintf(stderr, gettext(ERR_BAD_LINE), filename, line); (void) fclose(fp); return (ERROR); } if (dnum > L_MAXMAJ32) { (void) fprintf(stderr, gettext(ERR_MAJ_TOOBIG), drv, dnum, filename, L_MAXMAJ32); continue; } /* * cast down to a major_t; we can be sure this is safe because * of the above range-check. */ drv_majnum = (major_t)dnum; if (drv_majnum >= *nelems) { /* * Allocate some more space, up to drv_majnum + 1 so * we can accomodate 0 through drv_majnum. * * Note that in the failure case, we leak all of the * old contents of array. It's ok, since we just * wind up exiting immediately anyway. */ *nelems = drv_majnum + 1; *array = realloc(*array, *nelems); if (*array == NULL) { (void) fprintf(stderr, gettext(ERR_NO_MEM)); return (ERROR); } } (*array)[drv_majnum] = 1; } (void) fclose(fp); return (0); } int do_the_update(char *driver_name, char *major_number) { return (append_to_file(driver_name, major_number, name_to_major, ' ', " ", 0)); } /* * is_blank() returns 1 (true) if a line specified is composed of * whitespace characters only. otherwise, it returns 0 (false). * * Note. the argument (line) must be null-terminated. */ static int is_blank(char *line) { for (/* nothing */; *line != '\0'; line++) if (!isspace(*line)) return (0); return (1); }