| 1 | /* |
| 2 | * Copyright 2009, Sine Nomine Associates and others. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This software has been released under the terms of the IBM Public |
| 6 | * License. For details, see the LICENSE file in the top-level source |
| 7 | * directory or online at http://www.openafs.org/dl/license10.html |
| 8 | */ |
| 9 | |
| 10 | #include <afsconfig.h> |
| 11 | #include <afs/param.h> |
| 12 | |
| 13 | #include <roken.h> |
| 14 | |
| 15 | /* only build on platforms that have SysV IPC support; i.e., when we |
| 16 | * have sys/ipc.h */ |
| 17 | #ifdef HAVE_SYS_IPC_H |
| 18 | |
| 19 | #include <sys/ipc.h> |
| 20 | #include <sys/msg.h> |
| 21 | |
| 22 | #include "audit-api.h" |
| 23 | |
| 24 | /* solaris default is 2048 */ |
| 25 | #define MAXMSG 2048 |
| 26 | |
| 27 | /* message queue size will be increased to this value |
| 28 | if not already bigger */ |
| 29 | #define MSGMNB (2*1024*1024) |
| 30 | |
| 31 | static struct my_msgbuf { |
| 32 | long mtype; |
| 33 | char mtext[MAXMSG]; |
| 34 | } msgbuffer; |
| 35 | |
| 36 | static int mqid; |
| 37 | |
| 38 | static struct mqaudit_stats { |
| 39 | long all; |
| 40 | long truncated; |
| 41 | long lost; |
| 42 | } myauditstats; |
| 43 | |
| 44 | static int truncated; |
| 45 | |
| 46 | static void |
| 47 | send_msg(void) |
| 48 | { |
| 49 | /* +1 to send the trailing '\0' in the message too so the |
| 50 | receiver doesn't need to bother with it */ |
| 51 | if (msgsnd(mqid, &msgbuffer, strlen(msgbuffer.mtext)+1, IPC_NOWAIT) == -1) { |
| 52 | myauditstats.lost++; |
| 53 | } else if (truncated) { |
| 54 | myauditstats.truncated++; |
| 55 | } |
| 56 | myauditstats.all++; |
| 57 | msgbuffer.mtext[0] = 0; |
| 58 | truncated = 0; |
| 59 | } |
| 60 | |
| 61 | static void |
| 62 | append_msg(const char *format, ...) |
| 63 | { |
| 64 | va_list vaList; |
| 65 | int size, printed; |
| 66 | |
| 67 | size = MAXMSG - strlen(msgbuffer.mtext); |
| 68 | |
| 69 | va_start(vaList, format); |
| 70 | printed = vsnprintf(&msgbuffer.mtext[strlen(msgbuffer.mtext)], size, format, vaList); |
| 71 | va_end(vaList); |
| 72 | |
| 73 | /* A return value of size or more means that the output was truncated. |
| 74 | If an output error is encountered, a negative value is returned. */ |
| 75 | if (size <= printed || printed == -1) { |
| 76 | truncated = 1; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static int |
| 81 | open_file(const char *fileName) |
| 82 | { |
| 83 | int tempfd; |
| 84 | struct msqid_ds msqdesc; |
| 85 | |
| 86 | msgbuffer.mtext[0] = 0; |
| 87 | msgbuffer.mtype = 1; |
| 88 | |
| 89 | truncated = 0; |
| 90 | myauditstats.all = 0; |
| 91 | myauditstats.lost = 0; |
| 92 | myauditstats.truncated = 0; |
| 93 | |
| 94 | /* try to create file for ftok if it doesn't already exist */ |
| 95 | tempfd = open(fileName, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR); |
| 96 | if(tempfd != -1) |
| 97 | close(tempfd); |
| 98 | |
| 99 | mqid = msgget(ftok(fileName, 1), S_IRUSR | S_IWUSR | IPC_CREAT); |
| 100 | if (mqid == -1) { |
| 101 | printf("Warning: auditlog message queue %s cannot be opened.\n", fileName); |
| 102 | return 1; |
| 103 | } |
| 104 | |
| 105 | /* increase message queue size */ |
| 106 | msgctl(mqid, IPC_STAT, &msqdesc); |
| 107 | if (msqdesc.msg_qbytes < MSGMNB) { |
| 108 | msqdesc.msg_qbytes = MSGMNB; |
| 109 | msgctl(mqid, IPC_SET, &msqdesc); |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static void |
| 116 | print_interface_stats(FILE *out) |
| 117 | { |
| 118 | fprintf(out, "audit statistics: %ld messages total, %ld truncated, %ld lost\n", |
| 119 | myauditstats.all, myauditstats.truncated, myauditstats.lost); |
| 120 | } |
| 121 | |
| 122 | const struct osi_audit_ops audit_sysvmq_ops = { |
| 123 | &send_msg, |
| 124 | &append_msg, |
| 125 | &open_file, |
| 126 | &print_interface_stats, |
| 127 | }; |
| 128 | |
| 129 | #endif /* HAVE_SYS_IPC_H */ |