Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Mini logger implementation for busybox |
| 3 | * |
| 4 | * Copyright (C) 1999 by Lineo, inc. |
| 5 | * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include "internal.h" |
| 24 | #include <stdio.h> |
| 25 | #include <sys/socket.h> |
| 26 | #include <sys/un.h> |
| 27 | #include <unistd.h> |
| 28 | #include <time.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | #include <fcntl.h> |
| 32 | #include <signal.h> |
| 33 | #include <ctype.h> |
| 34 | #include <netdb.h> |
| 35 | |
| 36 | #if !defined BB_SYSLOGD |
| 37 | |
| 38 | #define SYSLOG_NAMES |
| 39 | #include <sys/syslog.h> |
| 40 | |
| 41 | #else |
| 42 | /* We have to do this since the header file defines static |
| 43 | * structues. Argh.... bad libc, bad, bad... |
| 44 | */ |
| 45 | #include <sys/syslog.h> |
| 46 | typedef struct _code { |
| 47 | char *c_name; |
| 48 | int c_val; |
| 49 | } CODE; |
| 50 | extern CODE prioritynames[]; |
| 51 | extern CODE facilitynames[]; |
| 52 | #endif |
| 53 | |
| 54 | static const char logger_usage[] = |
| 55 | "logger [OPTION]... [MESSAGE]\n\n" |
| 56 | "Write MESSAGE to the system log. If MESSAGE is '-', log stdin.\n\n" |
| 57 | "Options:\n" |
| 58 | "\t-s\tLog to stderr as well as the system log.\n" |
| 59 | "\t-p\tEnter the message with the specified priority.\n" |
| 60 | "\t\tThis may be numerical or a ``facility.level'' pair.\n"; |
| 61 | |
| 62 | |
| 63 | /* Decode a symbolic name to a numeric value |
| 64 | * this function is based on code |
| 65 | * Copyright (c) 1983, 1993 |
| 66 | * The Regents of the University of California. All rights reserved. |
| 67 | */ |
| 68 | static int |
| 69 | decode(char* name, CODE* codetab) |
| 70 | { |
| 71 | CODE *c; |
| 72 | |
| 73 | if (isdigit(*name)) |
| 74 | return (atoi(name)); |
| 75 | for (c = codetab; c->c_name; c++) { |
| 76 | if (!strcasecmp(name, c->c_name)) { |
| 77 | return (c->c_val); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | return (-1); |
| 82 | } |
| 83 | |
| 84 | /* Decode a symbolic name to a numeric value |
| 85 | * this function is based on code |
| 86 | * Copyright (c) 1983, 1993 |
| 87 | * The Regents of the University of California. All rights reserved. |
| 88 | */ |
| 89 | static int |
| 90 | pencode(char* s) |
| 91 | { |
| 92 | char *save; |
| 93 | int lev, fac=LOG_USER; |
| 94 | |
| 95 | for (save = s; *s && *s != '.'; ++s); |
| 96 | if (*s) { |
| 97 | *s = '\0'; |
| 98 | fac = decode(save, facilitynames); |
| 99 | if (fac < 0) { |
| 100 | fprintf(stderr, "unknown facility name: %s\n", save); |
| 101 | exit( FALSE); |
| 102 | } |
| 103 | *s++ = '.'; |
| 104 | } |
| 105 | else { |
| 106 | s = save; |
| 107 | } |
| 108 | lev = decode(s, prioritynames); |
| 109 | if (lev < 0) { |
| 110 | fprintf(stderr, "unknown priority name: %s\n", save); |
| 111 | exit( FALSE); |
| 112 | } |
| 113 | return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | extern int logger_main(int argc, char **argv) |
| 118 | { |
| 119 | struct sockaddr_un sunx; |
| 120 | int fd, pri = LOG_USER|LOG_NOTICE; |
Eric Andersen | befda6e | 1999-11-25 08:06:22 +0000 | [diff] [blame] | 121 | int fromStdinFlag=FALSE; |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 122 | int toStdErrFlag=FALSE; |
Erik Andersen | 1c5b258 | 1999-12-16 20:59:36 +0000 | [diff] [blame] | 123 | int stopLookingAtMeLikeThat=FALSE; |
Eric Andersen | befda6e | 1999-11-25 08:06:22 +0000 | [diff] [blame] | 124 | char *message, buf[1024], buf1[1024]; |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 125 | time_t now; |
| 126 | size_t addrLength; |
| 127 | |
| 128 | /* Parse any options */ |
| 129 | while (--argc > 0 && **(++argv) == '-') { |
Eric Andersen | befda6e | 1999-11-25 08:06:22 +0000 | [diff] [blame] | 130 | if (*((*argv)+1) == '\0') { |
| 131 | fromStdinFlag=TRUE; |
| 132 | } |
Erik Andersen | 1c5b258 | 1999-12-16 20:59:36 +0000 | [diff] [blame] | 133 | stopLookingAtMeLikeThat=FALSE; |
| 134 | while (*(++(*argv)) && stopLookingAtMeLikeThat==FALSE) { |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 135 | switch (**argv) { |
| 136 | case 's': |
| 137 | toStdErrFlag = TRUE; |
| 138 | break; |
| 139 | case 'p': |
| 140 | if (--argc == 0) { |
| 141 | usage(logger_usage); |
| 142 | } |
| 143 | pri = pencode(*(++argv)); |
Erik Andersen | 1c5b258 | 1999-12-16 20:59:36 +0000 | [diff] [blame] | 144 | stopLookingAtMeLikeThat=TRUE; |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 145 | break; |
| 146 | default: |
| 147 | usage(logger_usage); |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
Eric Andersen | befda6e | 1999-11-25 08:06:22 +0000 | [diff] [blame] | 152 | if (fromStdinFlag==TRUE) { |
| 153 | /* read from stdin */ |
| 154 | int i=0; |
| 155 | char c; |
| 156 | while ((c = getc(stdin)) != EOF && i<sizeof(buf1)) { |
| 157 | buf1[i++]=c; |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 158 | } |
Eric Andersen | befda6e | 1999-11-25 08:06:22 +0000 | [diff] [blame] | 159 | message=buf1; |
| 160 | } else { |
| 161 | if (argc>=1) { |
| 162 | message=*argv; |
| 163 | } else { |
| 164 | fprintf(stderr, "No message\n"); |
| 165 | exit( FALSE); |
| 166 | } |
Eric Andersen | 3843e96 | 1999-11-25 07:30:46 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | memset(&sunx, 0, sizeof(sunx)); |
| 170 | sunx.sun_family = AF_UNIX; /* Unix domain socket */ |
| 171 | strncpy(sunx.sun_path, _PATH_LOG, sizeof(sunx.sun_path)); |
| 172 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 ) { |
| 173 | perror("Couldn't obtain descriptor for socket " _PATH_LOG); |
| 174 | exit( FALSE); |
| 175 | } |
| 176 | |
| 177 | addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path); |
| 178 | |
| 179 | if (connect(fd, (struct sockaddr *) &sunx, addrLength)) { |
| 180 | perror("Could not connect to socket " _PATH_LOG); |
| 181 | exit( FALSE); |
| 182 | } |
| 183 | |
| 184 | time(&now); |
| 185 | snprintf (buf, sizeof(buf), "<%d>%.15s %s", pri, ctime(&now)+4, message); |
| 186 | |
| 187 | if (toStdErrFlag==TRUE) |
| 188 | fprintf(stderr, "%s\n", buf); |
| 189 | |
| 190 | write( fd, buf, sizeof(buf)); |
| 191 | |
| 192 | close(fd); |
| 193 | exit( TRUE); |
| 194 | } |
| 195 | |