/* * 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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * * write binary audit records directly to a file. */ #define DEBUG 0 #if DEBUG #define DPRINT(x) { (void) fprintf x; } #else #define DPRINT(x) #endif /* * auditd_plugin_open(), auditd_plugin() and auditd_plugin_close() * implement a replacable library for use by auditd; they are a * project private interface and may change without notice. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define AUDIT_DATE_SZ 14 #define AUDIT_FNAME_SZ 2 * AUDIT_DATE_SZ + 2 + MAXHOSTNAMELEN /* per-directory status */ #define SOFT_SPACE 0 /* minfree or less space available */ #define PLENTY_SPACE 1 /* more than minfree available */ #define SPACE_FULL 2 /* out of space */ #define AVAIL_MIN 50 /* If there are less that this number */ /* of blocks avail, the filesystem is */ /* presumed full. */ #define ALLHARD_DELAY 20 /* Call audit_warn(allhard) every 20 seconds */ /* minimum reasonable size in bytes to roll over an audit file */ #define FSIZE_MIN 512000 /* * The directory list is a circular linked list. It is pointed into by * activeDir. Each element contains the pointer to the next * element, the directory pathname, a flag for how much space there is * in the directory's filesystem, and a file handle. Since a new * directory list can be created from auditd_plugin_open() while the * current list is in use, activeDir is protected by log_mutex. */ typedef struct dirlist_s dirlist_t; struct dirlist_s { dirlist_t *dl_next; int dl_space; int dl_flags; char *dl_dirname; char *dl_filename; /* file name (not path) if open */ int dl_fd; /* file handle, -1 unless open */ }; /* * Defines for dl_flags */ #define SOFT_WARNED 0x0001 /* already did soft warning for this dir */ #define HARD_WARNED 0x0002 /* already did hard warning for this dir */ #if DEBUG static FILE *dbfp; /* debug file */ #endif static pthread_mutex_t log_mutex; static int binfile_is_open = 0; static int minfree = -1; static int minfreeblocks; /* minfree in blocks */ static dirlist_t *lastOpenDir = NULL; /* last activeDir */ static dirlist_t *activeDir = NULL; /* to be current directory */ static dirlist_t *startdir; /* first dir in the ring */ static int activeCount = 0; /* number of dirs in the ring */ static int openNewFile = 0; /* need to open a new file */ static int hung_count = 0; /* count of audit_warn hard */ /* flag from audit_plugin_open to audit_plugin_close */ static int am_open = 0; /* preferred dir state */ static int fullness_state = PLENTY_SPACE; /* * These are used to implement a maximum size for the auditing * file. binfile_maxsize is set via the 'p_fsize' parameter to the * audit_binfile plugin. */ static uint_t binfile_cursize = 0; static uint_t binfile_maxsize = 0; static int open_log(dirlist_t *); static void freedirlist(dirlist_t *head) { dirlist_t *n1, *n2; /* * Free up the old directory list if any */ if (head != NULL) { n1 = head; do { n2 = n1->dl_next; free(n1->dl_dirname); free(n1->dl_filename); free(n1); n1 = n2; } while (n1 != head); } } dirlist_t * dupdirnode(dirlist_t *node_orig) { dirlist_t *node_new; if ((node_new = calloc(1, sizeof (dirlist_t))) == NULL) { return (NULL); } if (node_orig->dl_dirname != NULL && (node_new->dl_dirname = strdup(node_orig->dl_dirname)) == NULL || node_orig->dl_filename != NULL && (node_new->dl_filename = strdup(node_orig->dl_filename)) == NULL) { freedirlist(node_new); return (NULL); } node_new->dl_next = node_new; node_new->dl_space = node_orig->dl_space; node_new->dl_flags = node_orig->dl_flags; node_new->dl_fd = node_orig->dl_fd; return (node_new); } /* * add to a linked list of directories available for writing * */ static int growauditlist(dirlist_t **listhead, char *dirlist, dirlist_t *endnode, int *count) { dirlist_t *node; char *bs, *be; dirlist_t **node_p; char *dirname; char *remainder; DPRINT((dbfp, "binfile: dirlist=%s\n", dirlist)); if (*listhead == NULL) node_p = listhead; else node_p = &(endnode->dl_next); node = NULL; while ((dirname = strtok_r(dirlist, ",", &remainder)) != NULL) { dirlist = NULL; DPRINT((dbfp, "binfile: p_dir = %s\n", dirname)); (*count)++; node = malloc(sizeof (dirlist_t)); if (node == NULL) return (AUDITD_NO_MEMORY); node->dl_flags = 0; node->dl_filename = NULL; node->dl_fd = -1; node->dl_space = PLENTY_SPACE; node->dl_dirname = malloc((unsigned)strlen(dirname) + 1); if (node->dl_dirname == NULL) return (AUDITD_NO_MEMORY); bs = dirname; while ((*bs == ' ') || (*bs == '\t')) /* trim blanks */ bs++; be = bs + strlen(bs) - 1; while (be > bs) { /* trim trailing blanks */ if ((*bs != ' ') && (*bs != '\t')) break; be--; } *(be + 1) = '\0'; (void) strlcpy(node->dl_dirname, bs, AUDIT_FNAME_SZ); if (*listhead != NULL) node->dl_next = *listhead; else node->dl_next = node; *node_p = node; node_p = &(node->dl_next); } return (0); } /* * create a linked list of directories available for writing * * if a list already exists, the two are compared and the new one is * used only if it is different than the old. * * returns -2 for new or changed list, 0 for unchanged list and -1 for * error. (Positive returns are for AUDITD_ values) * */ static int loadauditlist(char *dirstr, char *minfreestr) { dirlist_t *n1, *n2; dirlist_t *listhead = NULL; dirlist_t *thisdir; int node_count = 0; int rc; int temp_minfree; static dirlist_t *activeList = NULL; /* directory list */ DPRINT((dbfp, "binfile: Loading audit list from audit service " "(audit_binfile)\n")); if (dirstr == NULL || minfreestr == NULL) { DPRINT((dbfp, "binfile: internal error")); return (-1); } if ((rc = growauditlist(&listhead, dirstr, NULL, &node_count)) != 0) { return (rc); } if (node_count == 0) { /* * there was a problem getting the directory * list or remote host info from the audit_binfile * configuration even though auditd thought there was * at least 1 good entry */ DPRINT((dbfp, "binfile: " "problem getting directory / libpath list " "from audit_binfile configuration.\n")); return (-1); } #if DEBUG /* print out directory list */ if (listhead != NULL) { (void) fprintf(dbfp, "Directory list:\n\t%s\n", listhead->dl_dirname); thisdir = listhead->dl_next; while (thisdir != listhead) { (void) fprintf(dbfp, "\t%s\n", thisdir->dl_dirname); thisdir = thisdir->dl_next; } } #endif /* DEBUG */ thisdir = listhead; /* See if the list has changed (rc = 0 if no change, else 1) */ rc = 0; if (node_count == activeCount) { n1 = listhead; n2 = activeList; do { if (strcmp(n1->dl_dirname, n2->dl_dirname) != 0) { DPRINT((dbfp, "binfile: new dirname = %s\n" "binfile: old dirname = %s\n", n1->dl_dirname, n2->dl_dirname)); rc = -2; break; } n1 = n1->dl_next; n2 = n2->dl_next; } while ((n1 != listhead) && (n2 != activeList)); } else { DPRINT((dbfp, "binfile: dir counts differs\n" "binfile: old dir count = %d\n" "binfile: new dir count = %d\n", activeCount, node_count)); rc = -2; } if (rc == -2) { (void) pthread_mutex_lock(&log_mutex); DPRINT((dbfp, "loadauditlist: close / open audit.log(4)\n")); if (open_log(listhead) == 0) { openNewFile = 1; /* try again later */ } else { openNewFile = 0; } freedirlist(activeList); /* old list */ activeList = listhead; /* new list */ activeDir = startdir = thisdir; activeCount = node_count; (void) pthread_mutex_unlock(&log_mutex); } else { freedirlist(listhead); } /* Get the minfree value. */ if (minfreestr != NULL) temp_minfree = atoi(minfreestr); if ((temp_minfree < 0) || (temp_minfree > 100)) temp_minfree = 0; if (minfree != temp_minfree) { DPRINT((dbfp, "minfree: old = %d, new = %d\n", minfree, temp_minfree)); rc = -2; /* data change */ minfree = temp_minfree; } return (rc); } /* * getauditdate - get the current time (GMT) and put it in the form * yyyymmddHHMMSS . */ static void getauditdate(char *date) { struct timeval tp; struct timezone tzp; struct tm tm; (void) gettimeofday(&tp, &tzp); tm = *gmtime(&tp.tv_sec); /* * NOTE: if we want to use gmtime, we have to be aware that the * structure only keeps the year as an offset from TM_YEAR_BASE. * I have used TM_YEAR_BASE in this code so that if they change * this base from 1900 to 2000, it will hopefully mean that this * code does not have to change. TM_YEAR_BASE is defined in * tzfile.h . */ (void) sprintf(date, "%.4d%.2d%.2d%.2d%.2d%.2d", tm.tm_year + TM_YEAR_BASE, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); } /* * write_file_token - put the file token into the audit log */ static int write_file_token(int fd, char *name) { adr_t adr; /* xdr ptr */ struct timeval tv; /* time now */ char for_adr[AUDIT_FNAME_SZ + AUDIT_FNAME_SZ]; /* plenty of room */ char token_id; short i; (void) gettimeofday(&tv, (struct timezone *)0); i = strlen(name) + 1; adr_start(&adr, for_adr); #ifdef _LP64 token_id = AUT_OTHER_FILE64; adr_char(&adr, &token_id, 1); adr_int64(&adr, (int64_t *)& tv, 2); #else token_id = AUT_OTHER_FILE32; adr_char(&adr, &token_id, 1); adr_int32(&adr, (int32_t *)& tv, 2); #endif adr_short(&adr, &i, 1); adr_char(&adr, name, i); if (write(fd, for_adr, adr_count(&adr)) < 0) { DPRINT((dbfp, "binfile: Bad write\n")); return (errno); } return (0); } /* * close_log - close the file if open. Also put the name of the * new log file in the trailer, and rename the old file * to oldname. The caller must hold log_mutext while calling * close_log since any change to activeDir is a complete redo * of all it points to. * arguments - * oldname - the new name for the file to be closed * newname - the name of the new log file (for the trailer) */ static void close_log(dirlist_t **lastOpenDir_ptr, char *oname, char *newname) { char auditdate[AUDIT_DATE_SZ+1]; char *name; char oldname[AUDIT_FNAME_SZ+1]; dirlist_t *currentdir = *lastOpenDir_ptr; if ((currentdir == NULL) || (currentdir->dl_fd == -1)) return; /* * If oldname is blank, we were called by auditd_plugin_close() * instead of by open_log, so we need to update our name. */ (void) strlcpy(oldname, oname, AUDIT_FNAME_SZ); if (strcmp(oldname, "") == 0) { getauditdate(auditdate); assert(currentdir->dl_filename != NULL); (void) strlcpy(oldname, currentdir->dl_filename, AUDIT_FNAME_SZ); name = strrchr(oldname, '/') + 1; (void) memcpy(name + AUDIT_DATE_SZ + 1, auditdate, AUDIT_DATE_SZ); } /* * Write the trailer record and rename and close the file. * If any of the write, rename, or close fail, ignore it * since there is not much else we can do and the next open() * will trigger the necessary full directory logic. * * newname is "" if binfile is being closed down. */ (void) write_file_token(currentdir->dl_fd, newname); if (currentdir->dl_fd >= 0) { (void) fsync(currentdir->dl_fd); (void) close(currentdir->dl_fd); } currentdir->dl_fd = -1; (void) rename(currentdir->dl_filename, oldname); DPRINT((dbfp, "binfile: Log closed %s\n", oldname)); freedirlist(currentdir); *lastOpenDir_ptr = NULL; } /* * open_log - open a new file in the current directory. If a * file is already open, close it. * * return 1 if ok, 0 if all directories are full. * * lastOpenDir - used to get the oldfile name (and change it), * to close the oldfile. * * The caller must hold log_mutex while calling open_log. * */ static int open_log(dirlist_t *current_dir) { char auditdate[AUDIT_DATE_SZ + 1]; char oldname[AUDIT_FNAME_SZ + 1] = ""; char newname[AUDIT_FNAME_SZ + 1]; char *name; /* pointer into oldname */ int opened = 0; int error = 0; int newfd = 0; static char host[MAXHOSTNAMELEN + 1] = ""; /* previous directory with open log file */ if (host[0] == '\0') (void) gethostname(host, MAXHOSTNAMELEN); /* Get a filename which does not already exist */ while (!opened) { getauditdate(auditdate); (void) snprintf(newname, AUDIT_FNAME_SZ, "%s/%s.not_terminated.%s", current_dir->dl_dirname, auditdate, host); newfd = open(newname, O_RDWR | O_APPEND | O_CREAT | O_EXCL, 0640); if (newfd < 0) { switch (errno) { case EEXIST: DPRINT((dbfp, "open_log says duplicate for %s " "(will try another)\n", newname)); (void) sleep(1); break; case ENOENT: { /* invalid path */ char *msg; (void) asprintf(&msg, gettext("No such p_dir: %s\n"), current_dir->dl_dirname); DPRINT((dbfp, "open_log says about %s: %s\n", newname, strerror(errno))); __audit_syslog("audit_binfile.so", LOG_CONS | LOG_NDELAY, LOG_DAEMON, LOG_ERR, msg); free(msg); current_dir = current_dir->dl_next; return (0); } default: /* open failed */ DPRINT((dbfp, "open_log says full for %s: %s\n", newname, strerror(errno))); current_dir->dl_space = SPACE_FULL; current_dir = current_dir->dl_next; return (0); } /* switch */ } else opened = 1; } /* while */ /* * When we get here, we have opened our new log file. * Now we need to update the name of the old file to * store in this file's header. lastOpenDir may point * to current_dir if the list is only one entry long and * there is only one list. */ if ((lastOpenDir != NULL) && (lastOpenDir->dl_filename != NULL)) { (void) strlcpy(oldname, lastOpenDir->dl_filename, AUDIT_FNAME_SZ); name = (char *)strrchr(oldname, '/') + 1; (void) memcpy(name + AUDIT_DATE_SZ + 1, auditdate, AUDIT_DATE_SZ); close_log(&lastOpenDir, oldname, newname); } error = write_file_token(newfd, oldname); if (error) { /* write token failed */ (void) close(newfd); current_dir->dl_space = SPACE_FULL; current_dir->dl_fd = -1; free(current_dir->dl_filename); current_dir->dl_filename = NULL; current_dir = current_dir->dl_next; return (0); } else { if (current_dir->dl_filename != NULL) { free(current_dir->dl_filename); } current_dir->dl_filename = strdup(newname); current_dir->dl_fd = newfd; if (lastOpenDir == NULL) { freedirlist(lastOpenDir); if ((lastOpenDir = dupdirnode(current_dir)) == NULL) { __audit_syslog("audit_binfile.so", LOG_CONS | LOG_NDELAY, LOG_DAEMON, LOG_ERR, gettext("no memory")); return (0); } DPRINT((dbfp, "open_log created new lastOpenDir " "(%s, %s [fd: %d])\n", lastOpenDir->dl_dirname == NULL ? "" : lastOpenDir->dl_dirname, lastOpenDir->dl_filename == NULL ? "" : lastOpenDir->dl_filename, lastOpenDir->dl_fd)); } /* * New file opened, so reset file size statistic (used * to ensure audit log does not grow above size limit * set by p_fsize). */ binfile_cursize = 0; (void) __logpost(newname); DPRINT((dbfp, "binfile: Log opened: %s\n", newname)); return (1); } } #define IGNORE_SIZE 8192 /* * spacecheck - determine whether the given directory's filesystem * has the at least the space requested. Also set the space * value in the directory list structure. If the caller * passes other than PLENTY_SPACE or SOFT_SPACE, the caller should * ignore the return value. Otherwise, 0 = less than the * requested space is available, 1 = at least the requested space * is available. * * log_mutex must be held by the caller * * -1 is returned if stat fails * * IGNORE_SIZE is one page (Sol 9 / 10 timeframe) and is the default * buffer size written for Sol 9 and earlier. To keep the same accuracy * for the soft limit check as before, spacecheck checks for space * remaining IGNORE_SIZE bytes. This reduces the number of statvfs() * calls and related math. * * globals - * minfree - the soft limit, i.e., the % of filesystem to reserve */ static int spacecheck(dirlist_t *thisdir, int test_limit, size_t next_buf_size) { struct statvfs sb; static int ignore_size = 0; ignore_size += next_buf_size; if ((test_limit == PLENTY_SPACE) && (ignore_size < IGNORE_SIZE)) return (1); assert(thisdir != NULL); if (statvfs(thisdir->dl_dirname, &sb) < 0) { thisdir->dl_space = SPACE_FULL; minfreeblocks = AVAIL_MIN; return (-1); } else { minfreeblocks = ((minfree * sb.f_blocks) / 100) + AVAIL_MIN; if (sb.f_bavail < AVAIL_MIN) thisdir->dl_space = SPACE_FULL; else if (sb.f_bavail > minfreeblocks) { thisdir->dl_space = fullness_state = PLENTY_SPACE; ignore_size = 0; } else thisdir->dl_space = SOFT_SPACE; } if (thisdir->dl_space == PLENTY_SPACE) return (1); return (thisdir->dl_space == test_limit); } /* * Parses p_fsize value and contains it within the range FSIZE_MIN and * INT_MAX so using uints won't cause an undetected overflow of * INT_MAX. Defaults to 0 if the value is invalid or is missing. */ static void save_maxsize(char *maxsize) { /* * strtol() returns a long which could be larger than int so * store here for sanity checking first */ long proposed_maxsize; if (maxsize != NULL) { /* * There is no explicit error return from strtol() so * we may need to depend on the value of errno. */ errno = 0; proposed_maxsize = strtol(maxsize, (char **)NULL, 10); /* * If sizeof(long) is greater than sizeof(int) on this * platform, proposed_maxsize might be greater than * INT_MAX without it being reported as ERANGE. */ if ((errno == ERANGE) || ((proposed_maxsize != 0) && (proposed_maxsize < FSIZE_MIN)) || (proposed_maxsize > INT_MAX)) { binfile_maxsize = 0; DPRINT((dbfp, "binfile: p_fsize parameter out of " "range: %s\n", maxsize)); /* * Inform administrator of the error via * syslog */ __audit_syslog("audit_binfile.so", LOG_CONS | LOG_NDELAY, LOG_DAEMON, LOG_ERR, gettext("p_fsize parameter out of range\n")); } else { binfile_maxsize = proposed_maxsize; } } else { /* p_fsize string was not present */ binfile_maxsize = 0; } DPRINT((dbfp, "binfile: set maxsize to %d\n", binfile_maxsize)); } /* * auditd_plugin() writes a buffer to the currently open file. The * global "openNewFile" is used to force a new log file for cases such * as the initial open, when minfree is reached, the p_fsize value is * exceeded or the current file system fills up, and "audit -s" with * changed parameters. For "audit -n" a new log file is opened * immediately in auditd_plugin_open(). * * This function manages one or more audit directories as follows: * * If the current open file is in a directory that has not * reached the soft limit, write the input data and return. * * Scan the list of directories for one which has not reached * the soft limit; if one is found, write and return. Such * a writable directory is in "PLENTY_SPACE" state. * * Scan the list of directories for one which has not reached * the hard limit; if one is found, write and return. This * directory in in "SOFT_SPACE" state. * * Oh, and if a write fails, handle it like a hard space limit. * * audit_warn (via __audit_dowarn()) is used to alert an operator * at various levels of fullness. */ /* ARGSUSED */ auditd_rc_t auditd_plugin(const char *input, size_t in_len, uint64_t sequence, char **error) { auditd_rc_t rc = AUDITD_FAIL; int open_status; size_t out_len; /* avoid excess audit_warnage */ static int allsoftfull_warning = 0; static int allhard_pause = 0; static struct timeval next_allhard; struct timeval now; #if DEBUG int statrc; static char *last_file_written_to = NULL; static uint64_t last_sequence = 0; static uint64_t write_count = 0; if ((last_sequence > 0) && (sequence != last_sequence + 1)) (void) fprintf(dbfp, "binfile: buffer sequence=%llu but prev=%llu=n", sequence, last_sequence); last_sequence = sequence; (void) fprintf(dbfp, "binfile: input seq=%llu, len=%d\n", sequence, in_len); #endif *error = NULL; /* * lock is for activeDir, referenced by open_log() and close_log() */ (void) pthread_mutex_lock(&log_mutex); /* * If this would take us over the maximum size, open a new * file, unless maxsize is 0, in which case growth of the * audit log is unrestricted. */ if ((binfile_maxsize != 0) && ((binfile_cursize + in_len) > binfile_maxsize)) { DPRINT((dbfp, "binfile: maxsize exceeded, opening new audit " "file.\n")); openNewFile = 1; } while (rc == AUDITD_FAIL) { open_status = 1; if (openNewFile) { open_status = open_log(activeDir); if (open_status == 1) /* ok */ openNewFile = 0; } /* * consider "space ok" return and error return the same; * a -1 means spacecheck couldn't check for space. */ #if !DEBUG if ((open_status == 1) && (spacecheck(activeDir, fullness_state, in_len) != 0)) { #else if ((open_status == 1) && (statrc = spacecheck(activeDir, fullness_state, in_len) != 0)) { DPRINT((dbfp, "binfile: returned from spacecheck\n")); /* * The last copy of last_file_written_to is * never free'd, so there will be one open * memory reference on exit. It's debug only. */ if ((last_file_written_to != NULL) && (strcmp(last_file_written_to, activeDir->dl_filename) != 0)) { DPRINT((dbfp, "binfile: now writing to %s\n", activeDir->dl_filename)); free(last_file_written_to); } DPRINT((dbfp, "binfile: finished some debug stuff\n")); last_file_written_to = strdup(activeDir->dl_filename); #endif out_len = write(activeDir->dl_fd, input, in_len); DPRINT((dbfp, "binfile: finished the write\n")); binfile_cursize += out_len; if (out_len == in_len) { DPRINT((dbfp, "binfile: write_count=%llu, sequence=%llu," " l=%u\n", ++write_count, sequence, out_len)); allsoftfull_warning = 0; activeDir->dl_flags = 0; rc = AUDITD_SUCCESS; break; } else if (!(activeDir->dl_flags & HARD_WARNED)) { DPRINT((dbfp, "binfile: write failed, sequence=%llu, " "l=%u\n", sequence, out_len)); DPRINT((dbfp, "hard warning sent.\n")); __audit_dowarn("hard", activeDir->dl_dirname, 0); activeDir->dl_flags |= HARD_WARNED; } } else { DPRINT((dbfp, "binfile: statrc=%d, fullness_state=%d\n", statrc, fullness_state)); if (!(activeDir->dl_flags & SOFT_WARNED) && (activeDir->dl_space == SOFT_SPACE)) { DPRINT((dbfp, "soft warning sent\n")); __audit_dowarn("soft", activeDir->dl_dirname, 0); activeDir->dl_flags |= SOFT_WARNED; } if (!(activeDir->dl_flags & HARD_WARNED) && (activeDir->dl_space == SPACE_FULL)) { DPRINT((dbfp, "hard warning sent.\n")); __audit_dowarn("hard", activeDir->dl_dirname, 0); activeDir->dl_flags |= HARD_WARNED; } } DPRINT((dbfp, "binfile: activeDir=%s, next=%s\n", activeDir->dl_dirname, activeDir->dl_next->dl_dirname)); activeDir = activeDir->dl_next; openNewFile = 1; if (activeDir == startdir) { /* full circle */ if (fullness_state == PLENTY_SPACE) { /* once */ fullness_state = SOFT_SPACE; if (allsoftfull_warning == 0) { allsoftfull_warning++; __audit_dowarn("allsoft", "", 0); } } else { /* full circle twice */ if ((hung_count > 0) && !allhard_pause) { allhard_pause = 1; (void) gettimeofday(&next_allhard, NULL); next_allhard.tv_sec += ALLHARD_DELAY; } if (allhard_pause) { (void) gettimeofday(&now, NULL); if (now.tv_sec >= next_allhard.tv_sec) { allhard_pause = 0; __audit_dowarn("allhard", "", ++hung_count); } } else { __audit_dowarn("allhard", "", ++hung_count); } minfreeblocks = AVAIL_MIN; rc = AUDITD_RETRY; *error = strdup(gettext( "all partitions full\n")); (void) __logpost(""); } } } (void) pthread_mutex_unlock(&log_mutex); return (rc); } /* * It may be called multiple times as auditd handles SIGHUP and SIGUSR1 * corresponding to the audit(1M) flags -s and -n * * kvlist is NULL only if auditd caught a SIGUSR1 (audit -n), so after the first * time open is called; the reason is -s if kvlist != NULL and -n otherwise. * */ auditd_rc_t auditd_plugin_open(const kva_t *kvlist, char **ret_list, char **error) { int rc = 0; int status; int reason; char *dirlist; char *minfree; char *maxsize; kva_t *kv; *error = NULL; *ret_list = NULL; kv = (kva_t *)kvlist; if (am_open) { if (kvlist == NULL) reason = 1; /* audit -n */ else reason = 2; /* audit -s */ } else { reason = 0; /* initial open */ #if DEBUG dbfp = __auditd_debug_file_open(); #endif } DPRINT((dbfp, "binfile: am_open=%d, reason=%d\n", am_open, reason)); am_open = 1; if (kvlist == NULL) { dirlist = NULL; minfree = NULL; maxsize = NULL; } else { dirlist = kva_match(kv, "p_dir"); minfree = kva_match(kv, "p_minfree"); maxsize = kva_match(kv, "p_fsize"); } switch (reason) { case 0: /* initial open */ if (!binfile_is_open) (void) pthread_mutex_init(&log_mutex, NULL); binfile_is_open = 1; openNewFile = 1; /* FALLTHRU */ case 2: /* audit -s */ /* handle p_fsize parameter */ save_maxsize(maxsize); fullness_state = PLENTY_SPACE; status = loadauditlist(dirlist, minfree); if (status == -1) { (void) __logpost(""); *error = strdup(gettext("no directories configured")); return (AUDITD_RETRY); } else if (status == AUDITD_NO_MEMORY) { (void) __logpost(""); *error = strdup(gettext("no memory")); return (status); } else { /* status is 0 or -2 (no change or changed) */ hung_count = 0; DPRINT((dbfp, "binfile: loadauditlist returned %d\n", status)); } break; case 1: /* audit -n */ (void) pthread_mutex_lock(&log_mutex); if (open_log(activeDir) == 1) /* ok */ openNewFile = 0; (void) pthread_mutex_unlock(&log_mutex); break; } rc = AUDITD_SUCCESS; *ret_list = NULL; return (rc); } auditd_rc_t auditd_plugin_close(char **error) { *error = NULL; (void) pthread_mutex_lock(&log_mutex); close_log(&lastOpenDir, "", ""); freedirlist(activeDir); activeDir = NULL; (void) pthread_mutex_unlock(&log_mutex); DPRINT((dbfp, "binfile: closed\n")); (void) __logpost(""); if (binfile_is_open) { (void) pthread_mutex_destroy(&log_mutex); binfile_is_open = 0; #if DEBUG } else { (void) fprintf(dbfp, "auditd_plugin_close() called when already closed."); #endif } am_open = 0; return (AUDITD_SUCCESS); }