1 | /*
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2 | Copyright (c) 2001-2006, Gerrit Pape
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3 | All rights reserved.
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4 |
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5 | Redistribution and use in source and binary forms, with or without
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6 | modification, are permitted provided that the following conditions are met:
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7 |
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8 | 1. Redistributions of source code must retain the above copyright notice,
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9 | this list of conditions and the following disclaimer.
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10 | 2. Redistributions in binary form must reproduce the above copyright
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11 | notice, this list of conditions and the following disclaimer in the
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12 | documentation and/or other materials provided with the distribution.
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13 | 3. The name of the author may not be used to endorse or promote products
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14 | derived from this software without specific prior written permission.
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15 |
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16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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19 | EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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20 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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22 | OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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23 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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24 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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25 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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26 | */
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27 |
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28 | /* Busyboxed by Denis Vlasenko <vda.linux@googlemail.com> */
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29 | /* TODO: depends on runit_lib.c - review and reduce/eliminate */
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30 |
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31 | #include <sys/poll.h>
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32 | #include <sys/file.h>
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33 | #include "libbb.h"
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34 | #include "runit_lib.h"
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35 |
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36 | #define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
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37 |
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38 | #define FMT_PTIME 30
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39 |
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40 | static unsigned verbose;
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41 | static int linemax = 1000;
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42 | ////static int buflen = 1024;
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43 | static int linelen;
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44 |
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45 | static char **fndir;
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46 | static int fdwdir;
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47 | static int wstat;
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48 | static unsigned nearest_rotate;
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49 |
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50 | static char *line;
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51 | static smallint exitasap;
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52 | static smallint rotateasap;
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53 | static smallint reopenasap;
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54 | static smallint linecomplete = 1;
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55 |
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56 | static smallint tmaxflag;
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57 |
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58 | static char repl;
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59 | static const char *replace = "";
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60 |
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61 | static sigset_t *blocked_sigset;
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62 | static int fl_flag_0;
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63 |
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64 | static struct logdir {
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65 | ////char *btmp;
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66 | /* pattern list to match, in "aa\0bb\0\cc\0\0" form */
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67 | char *inst;
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68 | char *processor;
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69 | char *name;
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70 | unsigned size;
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71 | unsigned sizemax;
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72 | unsigned nmax;
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73 | unsigned nmin;
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74 | unsigned rotate_period;
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75 | int ppid;
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76 | int fddir;
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77 | int fdcur;
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78 | FILE* filecur; ////
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79 | int fdlock;
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80 | unsigned next_rotate;
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81 | char fnsave[FMT_PTIME];
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82 | char match;
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83 | char matcherr;
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84 | } *dir;
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85 | static unsigned dirn;
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86 |
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87 | #define FATAL "fatal: "
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88 | #define WARNING "warning: "
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89 | #define PAUSE "pausing: "
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90 | #define INFO "info: "
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91 |
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92 | #define usage() bb_show_usage()
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93 | static void fatalx(const char *m0)
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94 | {
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95 | bb_error_msg_and_die(FATAL"%s", m0);
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96 | }
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97 | static void warn(const char *m0)
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98 | {
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99 | bb_perror_msg(WARNING"%s", m0);
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100 | }
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101 | static void warn2(const char *m0, const char *m1)
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102 | {
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103 | bb_perror_msg(WARNING"%s: %s", m0, m1);
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104 | }
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105 | static void warnx(const char *m0, const char *m1)
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106 | {
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107 | bb_error_msg(WARNING"%s: %s", m0, m1);
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108 | }
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109 | static void pause_nomem(void)
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110 | {
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111 | bb_error_msg(PAUSE"out of memory");
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112 | sleep(3);
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113 | }
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114 | static void pause1cannot(const char *m0)
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115 | {
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116 | bb_perror_msg(PAUSE"cannot %s", m0);
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117 | sleep(3);
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118 | }
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119 | static void pause2cannot(const char *m0, const char *m1)
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120 | {
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121 | bb_perror_msg(PAUSE"cannot %s %s", m0, m1);
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122 | sleep(3);
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123 | }
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124 |
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125 | static char* wstrdup(const char *str)
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126 | {
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127 | char *s;
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128 | while (!(s = strdup(str)))
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129 | pause_nomem();
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130 | return s;
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131 | }
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132 |
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133 | /*** ex fmt_ptime.[ch] ***/
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134 |
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135 | /* NUL terminated */
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136 | static void fmt_time_human_30nul(char *s)
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137 | {
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138 | struct tm *t;
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139 | struct timeval tv;
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140 |
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141 | gettimeofday(&tv, NULL);
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142 | t = gmtime(&(tv.tv_sec));
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143 | sprintf(s, "%04u-%02u-%02u_%02u:%02u:%02u.%06u000",
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144 | (unsigned)(1900 + t->tm_year),
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145 | (unsigned)(t->tm_mon + 1),
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146 | (unsigned)(t->tm_mday),
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147 | (unsigned)(t->tm_hour),
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148 | (unsigned)(t->tm_min),
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149 | (unsigned)(t->tm_sec),
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150 | (unsigned)(tv.tv_usec)
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151 | );
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152 | /* 4+1 + 2+1 + 2+1 + 2+1 + 2+1 + 2+1 + 9 = */
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153 | /* 5 + 3 + 3 + 3 + 3 + 3 + 9 = */
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154 | /* 20 (up to '.' inclusive) + 9 (not including '\0') */
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155 | }
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156 |
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157 | /* NOT terminated! */
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158 | static void fmt_time_bernstein_25(char *s)
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159 | {
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160 | uint32_t pack[3];
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161 | struct timeval tv;
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162 | unsigned sec_hi;
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163 |
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164 | gettimeofday(&tv, NULL);
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165 | sec_hi = (0x400000000000000aULL + tv.tv_sec) >> 32;
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166 | tv.tv_sec = (time_t)(0x400000000000000aULL) + tv.tv_sec;
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167 | tv.tv_usec *= 1000;
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168 | /* Network order is big-endian: most significant byte first.
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169 | * This is exactly what we want here */
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170 | pack[0] = htonl(sec_hi);
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171 | pack[1] = htonl(tv.tv_sec);
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172 | pack[2] = htonl(tv.tv_usec);
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173 | *s++ = '@';
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174 | bin2hex(s, (char*)pack, 12);
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175 | }
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176 |
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177 | static unsigned processorstart(struct logdir *ld)
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178 | {
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179 | int pid;
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180 |
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181 | if (!ld->processor) return 0;
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182 | if (ld->ppid) {
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183 | warnx("processor already running", ld->name);
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184 | return 0;
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185 | }
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186 | while ((pid = fork()) == -1)
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187 | pause2cannot("fork for processor", ld->name);
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188 | if (!pid) {
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189 | char *prog[4];
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190 | int fd;
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191 |
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192 | /* child */
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193 | signal(SIGTERM, SIG_DFL);
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194 | signal(SIGALRM, SIG_DFL);
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195 | signal(SIGHUP, SIG_DFL);
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196 | sig_unblock(SIGTERM);
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197 | sig_unblock(SIGALRM);
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198 | sig_unblock(SIGHUP);
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199 |
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200 | if (verbose)
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201 | bb_error_msg(INFO"processing: %s/%s", ld->name, ld->fnsave);
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202 | fd = xopen(ld->fnsave, O_RDONLY|O_NDELAY);
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203 | xmove_fd(fd, 0);
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204 | ld->fnsave[26] = 't';
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205 | fd = xopen(ld->fnsave, O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT);
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206 | xmove_fd(fd, 1);
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207 | fd = open_read("state");
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208 | if (fd == -1) {
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209 | if (errno != ENOENT)
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210 | bb_perror_msg_and_die(FATAL"cannot %s processor %s", "open state for", ld->name);
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211 | close(xopen("state", O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT));
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212 | fd = xopen("state", O_RDONLY|O_NDELAY);
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213 | }
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214 | xmove_fd(fd, 4);
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215 | fd = xopen("newstate", O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT);
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216 | xmove_fd(fd, 5);
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217 |
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218 | // getenv("SHELL")?
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219 | prog[0] = (char*)"sh";
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220 | prog[1] = (char*)"-c";
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221 | prog[2] = ld->processor;
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222 | prog[3] = NULL;
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223 | execve("/bin/sh", prog, environ);
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224 | bb_perror_msg_and_die(FATAL"cannot %s processor %s", "run", ld->name);
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225 | }
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226 | ld->ppid = pid;
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227 | return 1;
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228 | }
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229 |
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230 | static unsigned processorstop(struct logdir *ld)
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231 | {
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232 | char f[28];
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233 |
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234 | if (ld->ppid) {
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235 | sig_unblock(SIGHUP);
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236 | while (wait_pid(&wstat, ld->ppid) == -1)
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237 | pause2cannot("wait for processor", ld->name);
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238 | sig_block(SIGHUP);
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239 | ld->ppid = 0;
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240 | }
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241 | if (ld->fddir == -1) return 1;
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242 | while (fchdir(ld->fddir) == -1)
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243 | pause2cannot("change directory, want processor", ld->name);
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244 | if (wait_exitcode(wstat) != 0) {
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245 | warnx("processor failed, restart", ld->name);
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246 | ld->fnsave[26] = 't';
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247 | unlink(ld->fnsave);
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248 | ld->fnsave[26] = 'u';
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249 | processorstart(ld);
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250 | while (fchdir(fdwdir) == -1)
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251 | pause1cannot("change to initial working directory");
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252 | return ld->processor ? 0 : 1;
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253 | }
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254 | ld->fnsave[26] = 't';
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255 | memcpy(f, ld->fnsave, 26);
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256 | f[26] = 's';
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257 | f[27] = '\0';
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258 | while (rename(ld->fnsave, f) == -1)
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259 | pause2cannot("rename processed", ld->name);
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260 | while (chmod(f, 0744) == -1)
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261 | pause2cannot("set mode of processed", ld->name);
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262 | ld->fnsave[26] = 'u';
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263 | if (unlink(ld->fnsave) == -1)
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264 | bb_error_msg(WARNING"cannot unlink: %s/%s", ld->name, ld->fnsave);
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265 | while (rename("newstate", "state") == -1)
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266 | pause2cannot("rename state", ld->name);
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267 | if (verbose)
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268 | bb_error_msg(INFO"processed: %s/%s", ld->name, f);
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269 | while (fchdir(fdwdir) == -1)
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270 | pause1cannot("change to initial working directory");
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271 | return 1;
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272 | }
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273 |
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274 | static void rmoldest(struct logdir *ld)
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275 | {
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276 | DIR *d;
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277 | struct dirent *f;
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278 | char oldest[FMT_PTIME];
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279 | int n = 0;
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280 |
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281 | oldest[0] = 'A'; oldest[1] = oldest[27] = 0;
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282 | while (!(d = opendir(".")))
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283 | pause2cannot("open directory, want rotate", ld->name);
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284 | errno = 0;
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285 | while ((f = readdir(d))) {
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286 | if ((f->d_name[0] == '@') && (strlen(f->d_name) == 27)) {
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287 | if (f->d_name[26] == 't') {
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288 | if (unlink(f->d_name) == -1)
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289 | warn2("cannot unlink processor leftover", f->d_name);
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290 | } else {
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291 | ++n;
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292 | if (strcmp(f->d_name, oldest) < 0)
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293 | memcpy(oldest, f->d_name, 27);
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294 | }
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295 | errno = 0;
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296 | }
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297 | }
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298 | if (errno)
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299 | warn2("cannot read directory", ld->name);
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300 | closedir(d);
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301 |
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302 | if (ld->nmax && (n > ld->nmax)) {
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303 | if (verbose)
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304 | bb_error_msg(INFO"delete: %s/%s", ld->name, oldest);
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305 | if ((*oldest == '@') && (unlink(oldest) == -1))
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306 | warn2("cannot unlink oldest logfile", ld->name);
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307 | }
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308 | }
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309 |
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310 | static unsigned rotate(struct logdir *ld)
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311 | {
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312 | struct stat st;
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313 | unsigned now;
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314 |
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315 | if (ld->fddir == -1) {
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316 | ld->rotate_period = 0;
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317 | return 0;
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318 | }
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319 | if (ld->ppid)
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320 | while (!processorstop(ld))
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321 | continue;
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322 |
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323 | while (fchdir(ld->fddir) == -1)
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324 | pause2cannot("change directory, want rotate", ld->name);
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325 |
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326 | /* create new filename */
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327 | ld->fnsave[25] = '.';
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328 | ld->fnsave[26] = 's';
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329 | if (ld->processor)
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330 | ld->fnsave[26] = 'u';
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331 | ld->fnsave[27] = '\0';
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332 | do {
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333 | fmt_time_bernstein_25(ld->fnsave);
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334 | errno = 0;
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335 | stat(ld->fnsave, &st);
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336 | } while (errno != ENOENT);
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337 |
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338 | now = monotonic_sec();
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339 | if (ld->rotate_period && LESS(ld->next_rotate, now)) {
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340 | ld->next_rotate = now + ld->rotate_period;
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341 | if (LESS(ld->next_rotate, nearest_rotate))
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342 | nearest_rotate = ld->next_rotate;
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343 | }
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344 |
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345 | if (ld->size > 0) {
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346 | while (fflush(ld->filecur) || fsync(ld->fdcur) == -1)
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347 | pause2cannot("fsync current logfile", ld->name);
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348 | while (fchmod(ld->fdcur, 0744) == -1)
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349 | pause2cannot("set mode of current", ld->name);
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350 | ////close(ld->fdcur);
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351 | fclose(ld->filecur);
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352 |
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353 | if (verbose) {
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354 | bb_error_msg(INFO"rename: %s/current %s %u", ld->name,
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355 | ld->fnsave, ld->size);
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356 | }
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357 | while (rename("current", ld->fnsave) == -1)
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358 | pause2cannot("rename current", ld->name);
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359 | while ((ld->fdcur = open("current", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600)) == -1)
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360 | pause2cannot("create new current", ld->name);
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361 | /* we presume this cannot fail */
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362 | ld->filecur = fdopen(ld->fdcur, "a"); ////
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363 | setvbuf(ld->filecur, NULL, _IOFBF, linelen); ////
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364 | coe(ld->fdcur);
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365 | ld->size = 0;
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366 | while (fchmod(ld->fdcur, 0644) == -1)
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367 | pause2cannot("set mode of current", ld->name);
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368 | rmoldest(ld);
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369 | processorstart(ld);
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370 | }
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371 |
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372 | while (fchdir(fdwdir) == -1)
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373 | pause1cannot("change to initial working directory");
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374 | return 1;
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375 | }
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376 |
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377 | static int buffer_pwrite(int n, char *s, unsigned len)
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378 | {
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379 | int i;
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380 | struct logdir *ld = &dir[n];
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381 |
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382 | if (ld->sizemax) {
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383 | if (ld->size >= ld->sizemax)
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384 | rotate(ld);
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385 | if (len > (ld->sizemax - ld->size))
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386 | len = ld->sizemax - ld->size;
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387 | }
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388 | while (1) {
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389 | ////i = full_write(ld->fdcur, s, len);
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390 | ////if (i != -1) break;
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391 | i = fwrite(s, 1, len, ld->filecur);
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392 | if (i == len) break;
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393 |
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394 | if ((errno == ENOSPC) && (ld->nmin < ld->nmax)) {
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395 | DIR *d;
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396 | struct dirent *f;
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397 | char oldest[FMT_PTIME];
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398 | int j = 0;
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399 |
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400 | while (fchdir(ld->fddir) == -1)
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401 | pause2cannot("change directory, want remove old logfile",
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402 | ld->name);
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403 | oldest[0] = 'A';
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404 | oldest[1] = oldest[27] = '\0';
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405 | while (!(d = opendir(".")))
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406 | pause2cannot("open directory, want remove old logfile",
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407 | ld->name);
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408 | errno = 0;
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409 | while ((f = readdir(d)))
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410 | if ((f->d_name[0] == '@') && (strlen(f->d_name) == 27)) {
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411 | ++j;
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412 | if (strcmp(f->d_name, oldest) < 0)
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413 | memcpy(oldest, f->d_name, 27);
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414 | }
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415 | if (errno) warn2("cannot read directory, want remove old logfile",
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416 | ld->name);
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417 | closedir(d);
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418 | errno = ENOSPC;
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419 | if (j > ld->nmin) {
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420 | if (*oldest == '@') {
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421 | bb_error_msg(WARNING"out of disk space, delete: %s/%s",
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422 | ld->name, oldest);
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423 | errno = 0;
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424 | if (unlink(oldest) == -1) {
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425 | warn2("cannot unlink oldest logfile", ld->name);
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426 | errno = ENOSPC;
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427 | }
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428 | while (fchdir(fdwdir) == -1)
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429 | pause1cannot("change to initial working directory");
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430 | }
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431 | }
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432 | }
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433 | if (errno)
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434 | pause2cannot("write to current", ld->name);
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435 | }
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436 |
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437 | ld->size += i;
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438 | if (ld->sizemax)
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439 | if (s[i-1] == '\n')
|
---|
440 | if (ld->size >= (ld->sizemax - linemax))
|
---|
441 | rotate(ld);
|
---|
442 | return i;
|
---|
443 | }
|
---|
444 |
|
---|
445 | static void logdir_close(struct logdir *ld)
|
---|
446 | {
|
---|
447 | if (ld->fddir == -1)
|
---|
448 | return;
|
---|
449 | if (verbose)
|
---|
450 | bb_error_msg(INFO"close: %s", ld->name);
|
---|
451 | close(ld->fddir);
|
---|
452 | ld->fddir = -1;
|
---|
453 | if (ld->fdcur == -1)
|
---|
454 | return; /* impossible */
|
---|
455 | while (fflush(ld->filecur) || fsync(ld->fdcur) == -1)
|
---|
456 | pause2cannot("fsync current logfile", ld->name);
|
---|
457 | while (fchmod(ld->fdcur, 0744) == -1)
|
---|
458 | pause2cannot("set mode of current", ld->name);
|
---|
459 | ////close(ld->fdcur);
|
---|
460 | fclose(ld->filecur);
|
---|
461 | ld->fdcur = -1;
|
---|
462 | if (ld->fdlock == -1)
|
---|
463 | return; /* impossible */
|
---|
464 | close(ld->fdlock);
|
---|
465 | ld->fdlock = -1;
|
---|
466 | free(ld->processor);
|
---|
467 | ld->processor = NULL;
|
---|
468 | }
|
---|
469 |
|
---|
470 | static unsigned logdir_open(struct logdir *ld, const char *fn)
|
---|
471 | {
|
---|
472 | char buf[128];
|
---|
473 | unsigned now;
|
---|
474 | char *new, *s, *np;
|
---|
475 | int i;
|
---|
476 | struct stat st;
|
---|
477 |
|
---|
478 | now = monotonic_sec();
|
---|
479 |
|
---|
480 | ld->fddir = open(fn, O_RDONLY|O_NDELAY);
|
---|
481 | if (ld->fddir == -1) {
|
---|
482 | warn2("cannot open log directory", (char*)fn);
|
---|
483 | return 0;
|
---|
484 | }
|
---|
485 | coe(ld->fddir);
|
---|
486 | if (fchdir(ld->fddir) == -1) {
|
---|
487 | logdir_close(ld);
|
---|
488 | warn2("cannot change directory", (char*)fn);
|
---|
489 | return 0;
|
---|
490 | }
|
---|
491 | ld->fdlock = open("lock", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
|
---|
492 | if ((ld->fdlock == -1)
|
---|
493 | || (lock_exnb(ld->fdlock) == -1)
|
---|
494 | ) {
|
---|
495 | logdir_close(ld);
|
---|
496 | warn2("cannot lock directory", (char*)fn);
|
---|
497 | while (fchdir(fdwdir) == -1)
|
---|
498 | pause1cannot("change to initial working directory");
|
---|
499 | return 0;
|
---|
500 | }
|
---|
501 | coe(ld->fdlock);
|
---|
502 |
|
---|
503 | ld->size = 0;
|
---|
504 | ld->sizemax = 1000000;
|
---|
505 | ld->nmax = ld->nmin = 10;
|
---|
506 | ld->rotate_period = 0;
|
---|
507 | ld->name = (char*)fn;
|
---|
508 | ld->ppid = 0;
|
---|
509 | ld->match = '+';
|
---|
510 | free(ld->inst); ld->inst = NULL;
|
---|
511 | free(ld->processor); ld->processor = NULL;
|
---|
512 |
|
---|
513 | /* read config */
|
---|
514 | i = open_read_close("config", buf, sizeof(buf));
|
---|
515 | if (i < 0 && errno != ENOENT)
|
---|
516 | bb_perror_msg(WARNING"%s/config", ld->name);
|
---|
517 | if (i > 0) {
|
---|
518 | if (verbose)
|
---|
519 | bb_error_msg(INFO"read: %s/config", ld->name);
|
---|
520 | s = buf;
|
---|
521 | while (s) {
|
---|
522 | np = strchr(s, '\n');
|
---|
523 | if (np)
|
---|
524 | *np++ = '\0';
|
---|
525 | switch (s[0]) {
|
---|
526 | case '+':
|
---|
527 | case '-':
|
---|
528 | case 'e':
|
---|
529 | case 'E':
|
---|
530 | /* Add '\n'-terminated line to ld->inst */
|
---|
531 | while (1) {
|
---|
532 | int l = asprintf(&new, "%s%s\n", ld->inst ? : "", s);
|
---|
533 | if (l >= 0 && new)
|
---|
534 | break;
|
---|
535 | pause_nomem();
|
---|
536 | }
|
---|
537 | free(ld->inst);
|
---|
538 | ld->inst = new;
|
---|
539 | break;
|
---|
540 | case 's': {
|
---|
541 | static const struct suffix_mult km_suffixes[] = {
|
---|
542 | { "k", 1024 },
|
---|
543 | { "m", 1024*1024 },
|
---|
544 | { }
|
---|
545 | };
|
---|
546 | ld->sizemax = xatou_sfx(&s[1], km_suffixes);
|
---|
547 | break;
|
---|
548 | }
|
---|
549 | case 'n':
|
---|
550 | ld->nmax = xatoi_u(&s[1]);
|
---|
551 | break;
|
---|
552 | case 'N':
|
---|
553 | ld->nmin = xatoi_u(&s[1]);
|
---|
554 | break;
|
---|
555 | case 't': {
|
---|
556 | static const struct suffix_mult mh_suffixes[] = {
|
---|
557 | { "m", 60 },
|
---|
558 | { "h", 60*60 },
|
---|
559 | /*{ "d", 24*60*60 },*/
|
---|
560 | { }
|
---|
561 | };
|
---|
562 | ld->rotate_period = xatou_sfx(&s[1], mh_suffixes);
|
---|
563 | if (ld->rotate_period) {
|
---|
564 | ld->next_rotate = now + ld->rotate_period;
|
---|
565 | if (!tmaxflag || LESS(ld->next_rotate, nearest_rotate))
|
---|
566 | nearest_rotate = ld->next_rotate;
|
---|
567 | tmaxflag = 1;
|
---|
568 | }
|
---|
569 | break;
|
---|
570 | }
|
---|
571 | case '!':
|
---|
572 | if (s[1]) {
|
---|
573 | free(ld->processor);
|
---|
574 | ld->processor = wstrdup(s);
|
---|
575 | }
|
---|
576 | break;
|
---|
577 | }
|
---|
578 | s = np;
|
---|
579 | }
|
---|
580 | /* Convert "aa\nbb\ncc\n\0" to "aa\0bb\0cc\0\0" */
|
---|
581 | s = ld->inst;
|
---|
582 | while (s) {
|
---|
583 | np = strchr(s, '\n');
|
---|
584 | if (np)
|
---|
585 | *np++ = '\0';
|
---|
586 | s = np;
|
---|
587 | }
|
---|
588 | }
|
---|
589 |
|
---|
590 | /* open current */
|
---|
591 | i = stat("current", &st);
|
---|
592 | if (i != -1) {
|
---|
593 | if (st.st_size && !(st.st_mode & S_IXUSR)) {
|
---|
594 | ld->fnsave[25] = '.';
|
---|
595 | ld->fnsave[26] = 'u';
|
---|
596 | ld->fnsave[27] = '\0';
|
---|
597 | do {
|
---|
598 | fmt_time_bernstein_25(ld->fnsave);
|
---|
599 | errno = 0;
|
---|
600 | stat(ld->fnsave, &st);
|
---|
601 | } while (errno != ENOENT);
|
---|
602 | while (rename("current", ld->fnsave) == -1)
|
---|
603 | pause2cannot("rename current", ld->name);
|
---|
604 | rmoldest(ld);
|
---|
605 | i = -1;
|
---|
606 | } else {
|
---|
607 | /* st.st_size can be not just bigger, but WIDER!
|
---|
608 | * This code is safe: if st.st_size > 4GB, we select
|
---|
609 | * ld->sizemax (because it's "unsigned") */
|
---|
610 | ld->size = (st.st_size > ld->sizemax) ? ld->sizemax : st.st_size;
|
---|
611 | }
|
---|
612 | } else {
|
---|
613 | if (errno != ENOENT) {
|
---|
614 | logdir_close(ld);
|
---|
615 | warn2("cannot stat current", ld->name);
|
---|
616 | while (fchdir(fdwdir) == -1)
|
---|
617 | pause1cannot("change to initial working directory");
|
---|
618 | return 0;
|
---|
619 | }
|
---|
620 | }
|
---|
621 | while ((ld->fdcur = open("current", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600)) == -1)
|
---|
622 | pause2cannot("open current", ld->name);
|
---|
623 | /* we presume this cannot fail */
|
---|
624 | ld->filecur = fdopen(ld->fdcur, "a"); ////
|
---|
625 | setvbuf(ld->filecur, NULL, _IOFBF, linelen); ////
|
---|
626 |
|
---|
627 | coe(ld->fdcur);
|
---|
628 | while (fchmod(ld->fdcur, 0644) == -1)
|
---|
629 | pause2cannot("set mode of current", ld->name);
|
---|
630 |
|
---|
631 | if (verbose) {
|
---|
632 | if (i == 0) bb_error_msg(INFO"append: %s/current", ld->name);
|
---|
633 | else bb_error_msg(INFO"new: %s/current", ld->name);
|
---|
634 | }
|
---|
635 |
|
---|
636 | while (fchdir(fdwdir) == -1)
|
---|
637 | pause1cannot("change to initial working directory");
|
---|
638 | return 1;
|
---|
639 | }
|
---|
640 |
|
---|
641 | static void logdirs_reopen(void)
|
---|
642 | {
|
---|
643 | int l;
|
---|
644 | int ok = 0;
|
---|
645 |
|
---|
646 | tmaxflag = 0;
|
---|
647 | for (l = 0; l < dirn; ++l) {
|
---|
648 | logdir_close(&dir[l]);
|
---|
649 | if (logdir_open(&dir[l], fndir[l]))
|
---|
650 | ok = 1;
|
---|
651 | }
|
---|
652 | if (!ok)
|
---|
653 | fatalx("no functional log directories");
|
---|
654 | }
|
---|
655 |
|
---|
656 | /* Will look good in libbb one day */
|
---|
657 | static ssize_t ndelay_read(int fd, void *buf, size_t count)
|
---|
658 | {
|
---|
659 | if (!(fl_flag_0 & O_NONBLOCK))
|
---|
660 | fcntl(fd, F_SETFL, fl_flag_0 | O_NONBLOCK);
|
---|
661 | count = safe_read(fd, buf, count);
|
---|
662 | if (!(fl_flag_0 & O_NONBLOCK))
|
---|
663 | fcntl(fd, F_SETFL, fl_flag_0);
|
---|
664 | return count;
|
---|
665 | }
|
---|
666 |
|
---|
667 | /* Used for reading stdin */
|
---|
668 | static int buffer_pread(int fd, char *s, unsigned len)
|
---|
669 | {
|
---|
670 | unsigned now;
|
---|
671 | struct pollfd input;
|
---|
672 | int i;
|
---|
673 |
|
---|
674 | input.fd = 0;
|
---|
675 | input.events = POLLIN;
|
---|
676 |
|
---|
677 | do {
|
---|
678 | if (rotateasap) {
|
---|
679 | for (i = 0; i < dirn; ++i)
|
---|
680 | rotate(dir + i);
|
---|
681 | rotateasap = 0;
|
---|
682 | }
|
---|
683 | if (exitasap) {
|
---|
684 | if (linecomplete)
|
---|
685 | return 0;
|
---|
686 | len = 1;
|
---|
687 | }
|
---|
688 | if (reopenasap) {
|
---|
689 | logdirs_reopen();
|
---|
690 | reopenasap = 0;
|
---|
691 | }
|
---|
692 | now = monotonic_sec();
|
---|
693 | nearest_rotate = now + (45 * 60 + 45);
|
---|
694 | for (i = 0; i < dirn; ++i) {
|
---|
695 | if (dir[i].rotate_period) {
|
---|
696 | if (LESS(dir[i].next_rotate, now))
|
---|
697 | rotate(dir + i);
|
---|
698 | if (LESS(dir[i].next_rotate, nearest_rotate))
|
---|
699 | nearest_rotate = dir[i].next_rotate;
|
---|
700 | }
|
---|
701 | }
|
---|
702 |
|
---|
703 | sigprocmask(SIG_UNBLOCK, blocked_sigset, NULL);
|
---|
704 | i = nearest_rotate - now;
|
---|
705 | if (i > 1000000)
|
---|
706 | i = 1000000;
|
---|
707 | if (i <= 0)
|
---|
708 | i = 1;
|
---|
709 | poll(&input, 1, i * 1000);
|
---|
710 | sigprocmask(SIG_BLOCK, blocked_sigset, NULL);
|
---|
711 |
|
---|
712 | i = ndelay_read(fd, s, len);
|
---|
713 | if (i >= 0)
|
---|
714 | break;
|
---|
715 | if (errno == EINTR)
|
---|
716 | continue;
|
---|
717 | if (errno != EAGAIN) {
|
---|
718 | warn("cannot read standard input");
|
---|
719 | break;
|
---|
720 | }
|
---|
721 | /* else: EAGAIN - normal, repeat silently */
|
---|
722 | } while (!exitasap);
|
---|
723 |
|
---|
724 | if (i > 0) {
|
---|
725 | int cnt;
|
---|
726 | linecomplete = (s[i-1] == '\n');
|
---|
727 | if (!repl)
|
---|
728 | return i;
|
---|
729 |
|
---|
730 | cnt = i;
|
---|
731 | while (--cnt >= 0) {
|
---|
732 | char ch = *s;
|
---|
733 | if (ch != '\n') {
|
---|
734 | if (ch < 32 || ch > 126)
|
---|
735 | *s = repl;
|
---|
736 | else {
|
---|
737 | int j;
|
---|
738 | for (j = 0; replace[j]; ++j) {
|
---|
739 | if (ch == replace[j]) {
|
---|
740 | *s = repl;
|
---|
741 | break;
|
---|
742 | }
|
---|
743 | }
|
---|
744 | }
|
---|
745 | }
|
---|
746 | s++;
|
---|
747 | }
|
---|
748 | }
|
---|
749 | return i;
|
---|
750 | }
|
---|
751 |
|
---|
752 | static void sig_term_handler(int sig_no)
|
---|
753 | {
|
---|
754 | if (verbose)
|
---|
755 | bb_error_msg(INFO"sig%s received", "term");
|
---|
756 | exitasap = 1;
|
---|
757 | }
|
---|
758 |
|
---|
759 | static void sig_child_handler(int sig_no)
|
---|
760 | {
|
---|
761 | int pid, l;
|
---|
762 |
|
---|
763 | if (verbose)
|
---|
764 | bb_error_msg(INFO"sig%s received", "child");
|
---|
765 | while ((pid = wait_nohang(&wstat)) > 0) {
|
---|
766 | for (l = 0; l < dirn; ++l) {
|
---|
767 | if (dir[l].ppid == pid) {
|
---|
768 | dir[l].ppid = 0;
|
---|
769 | processorstop(&dir[l]);
|
---|
770 | break;
|
---|
771 | }
|
---|
772 | }
|
---|
773 | }
|
---|
774 | }
|
---|
775 |
|
---|
776 | static void sig_alarm_handler(int sig_no)
|
---|
777 | {
|
---|
778 | if (verbose)
|
---|
779 | bb_error_msg(INFO"sig%s received", "alarm");
|
---|
780 | rotateasap = 1;
|
---|
781 | }
|
---|
782 |
|
---|
783 | static void sig_hangup_handler(int sig_no)
|
---|
784 | {
|
---|
785 | if (verbose)
|
---|
786 | bb_error_msg(INFO"sig%s received", "hangup");
|
---|
787 | reopenasap = 1;
|
---|
788 | }
|
---|
789 |
|
---|
790 | static void logmatch(struct logdir *ld)
|
---|
791 | {
|
---|
792 | char *s;
|
---|
793 |
|
---|
794 | ld->match = '+';
|
---|
795 | ld->matcherr = 'E';
|
---|
796 | s = ld->inst;
|
---|
797 | while (s && s[0]) {
|
---|
798 | switch (s[0]) {
|
---|
799 | case '+':
|
---|
800 | case '-':
|
---|
801 | if (pmatch(s+1, line, linelen))
|
---|
802 | ld->match = s[0];
|
---|
803 | break;
|
---|
804 | case 'e':
|
---|
805 | case 'E':
|
---|
806 | if (pmatch(s+1, line, linelen))
|
---|
807 | ld->matcherr = s[0];
|
---|
808 | break;
|
---|
809 | }
|
---|
810 | s += strlen(s) + 1;
|
---|
811 | }
|
---|
812 | }
|
---|
813 |
|
---|
814 | int svlogd_main(int argc, char **argv);
|
---|
815 | int svlogd_main(int argc, char **argv)
|
---|
816 | {
|
---|
817 | sigset_t ss;
|
---|
818 | char *r,*l,*b;
|
---|
819 | ssize_t stdin_cnt = 0;
|
---|
820 | int i;
|
---|
821 | unsigned opt;
|
---|
822 | unsigned timestamp = 0;
|
---|
823 | void* (*memRchr)(const void *, int, size_t) = memchr;
|
---|
824 |
|
---|
825 | #define line bb_common_bufsiz1
|
---|
826 |
|
---|
827 | opt_complementary = "tt:vv";
|
---|
828 | opt = getopt32(argv, "r:R:l:b:tv",
|
---|
829 | &r, &replace, &l, &b, ×tamp, &verbose);
|
---|
830 | if (opt & 1) { // -r
|
---|
831 | repl = r[0];
|
---|
832 | if (!repl || r[1]) usage();
|
---|
833 | }
|
---|
834 | if (opt & 2) if (!repl) repl = '_'; // -R
|
---|
835 | if (opt & 4) { // -l
|
---|
836 | linemax = xatou_range(l, 0, BUFSIZ-26);
|
---|
837 | if (linemax == 0) linemax = BUFSIZ-26;
|
---|
838 | if (linemax < 256) linemax = 256;
|
---|
839 | }
|
---|
840 | ////if (opt & 8) { // -b
|
---|
841 | //// buflen = xatoi_u(b);
|
---|
842 | //// if (buflen == 0) buflen = 1024;
|
---|
843 | ////}
|
---|
844 | //if (opt & 0x10) timestamp++; // -t
|
---|
845 | //if (opt & 0x20) verbose++; // -v
|
---|
846 | //if (timestamp > 2) timestamp = 2;
|
---|
847 | argv += optind;
|
---|
848 | argc -= optind;
|
---|
849 |
|
---|
850 | dirn = argc;
|
---|
851 | if (dirn <= 0) usage();
|
---|
852 | ////if (buflen <= linemax) usage();
|
---|
853 | fdwdir = xopen(".", O_RDONLY|O_NDELAY);
|
---|
854 | coe(fdwdir);
|
---|
855 | dir = xzalloc(dirn * sizeof(struct logdir));
|
---|
856 | for (i = 0; i < dirn; ++i) {
|
---|
857 | dir[i].fddir = -1;
|
---|
858 | dir[i].fdcur = -1;
|
---|
859 | ////dir[i].btmp = xmalloc(buflen);
|
---|
860 | /*dir[i].ppid = 0;*/
|
---|
861 | }
|
---|
862 | /* line = xmalloc(linemax + (timestamp ? 26 : 0)); */
|
---|
863 | fndir = argv;
|
---|
864 | /* We cannot set NONBLOCK on fd #0 permanently - this setting
|
---|
865 | * _isn't_ per-process! It is shared among all other processes
|
---|
866 | * with the same stdin */
|
---|
867 | fl_flag_0 = fcntl(0, F_GETFL);
|
---|
868 |
|
---|
869 | blocked_sigset = &ss;
|
---|
870 | sigemptyset(&ss);
|
---|
871 | sigaddset(&ss, SIGTERM);
|
---|
872 | sigaddset(&ss, SIGCHLD);
|
---|
873 | sigaddset(&ss, SIGALRM);
|
---|
874 | sigaddset(&ss, SIGHUP);
|
---|
875 | sigprocmask(SIG_BLOCK, &ss, NULL);
|
---|
876 | sig_catch(SIGTERM, sig_term_handler);
|
---|
877 | sig_catch(SIGCHLD, sig_child_handler);
|
---|
878 | sig_catch(SIGALRM, sig_alarm_handler);
|
---|
879 | sig_catch(SIGHUP, sig_hangup_handler);
|
---|
880 |
|
---|
881 | logdirs_reopen();
|
---|
882 |
|
---|
883 | /* Without timestamps, we don't have to print each line
|
---|
884 | * separately, so we can look for _last_ newline, not first,
|
---|
885 | * thus batching writes */
|
---|
886 | if (!timestamp)
|
---|
887 | memRchr = memrchr;
|
---|
888 |
|
---|
889 | setvbuf(stderr, NULL, _IOFBF, linelen);
|
---|
890 |
|
---|
891 | /* Each iteration processes one or more lines */
|
---|
892 | while (1) {
|
---|
893 | char stamp[FMT_PTIME];
|
---|
894 | char *lineptr;
|
---|
895 | char *printptr;
|
---|
896 | char *np;
|
---|
897 | int printlen;
|
---|
898 | char ch;
|
---|
899 |
|
---|
900 | lineptr = line;
|
---|
901 | if (timestamp)
|
---|
902 | lineptr += 26;
|
---|
903 |
|
---|
904 | /* lineptr[0..linemax-1] - buffer for stdin */
|
---|
905 | /* (possibly has some unprocessed data from prev loop) */
|
---|
906 |
|
---|
907 | /* Refill the buffer if needed */
|
---|
908 | np = memRchr(lineptr, '\n', stdin_cnt);
|
---|
909 | if (!np && !exitasap) {
|
---|
910 | i = linemax - stdin_cnt; /* avail. bytes at tail */
|
---|
911 | if (i >= 128) {
|
---|
912 | i = buffer_pread(0, lineptr + stdin_cnt, i);
|
---|
913 | if (i <= 0) /* EOF or error on stdin */
|
---|
914 | exitasap = 1;
|
---|
915 | else {
|
---|
916 | np = memRchr(lineptr + stdin_cnt, '\n', i);
|
---|
917 | stdin_cnt += i;
|
---|
918 | }
|
---|
919 | }
|
---|
920 | }
|
---|
921 | if (stdin_cnt <= 0 && exitasap)
|
---|
922 | break;
|
---|
923 |
|
---|
924 | /* Search for '\n' (in fact, np already holds the result) */
|
---|
925 | linelen = stdin_cnt;
|
---|
926 | if (np) {
|
---|
927 | print_to_nl: /* NB: starting from here lineptr may point
|
---|
928 | * farther out into line[] */
|
---|
929 | linelen = np - lineptr + 1;
|
---|
930 | }
|
---|
931 | /* linelen == no of chars incl. '\n' (or == stdin_cnt) */
|
---|
932 | ch = lineptr[linelen-1];
|
---|
933 |
|
---|
934 | /* Biggest performance hit was coming from the fact
|
---|
935 | * that we did not buffer writes. We were reading many lines
|
---|
936 | * in one read() above, but wrote one line per write().
|
---|
937 | * We are using stdio to fix that */
|
---|
938 |
|
---|
939 | /* write out lineptr[0..linelen-1] to each log destination
|
---|
940 | * (or lineptr[-26..linelen-1] if timestamping) */
|
---|
941 | printlen = linelen;
|
---|
942 | printptr = lineptr;
|
---|
943 | if (timestamp) {
|
---|
944 | if (timestamp == 1)
|
---|
945 | fmt_time_bernstein_25(stamp);
|
---|
946 | else /* 2: */
|
---|
947 | fmt_time_human_30nul(stamp);
|
---|
948 | printlen += 26;
|
---|
949 | printptr -= 26;
|
---|
950 | memcpy(printptr, stamp, 25);
|
---|
951 | printptr[25] = ' ';
|
---|
952 | }
|
---|
953 | for (i = 0; i < dirn; ++i) {
|
---|
954 | struct logdir *ld = &dir[i];
|
---|
955 | if (ld->fddir == -1) continue;
|
---|
956 | if (ld->inst)
|
---|
957 | logmatch(ld);
|
---|
958 | if (ld->matcherr == 'e')
|
---|
959 | ////full_write(2, printptr, printlen);
|
---|
960 | fwrite(lineptr, 1, linelen, stderr);
|
---|
961 | if (ld->match != '+') continue;
|
---|
962 | buffer_pwrite(i, printptr, printlen);
|
---|
963 | }
|
---|
964 |
|
---|
965 | /* If we didn't see '\n' (long input line), */
|
---|
966 | /* read/write repeatedly until we see it */
|
---|
967 | while (ch != '\n') {
|
---|
968 | /* lineptr is emptied now, safe to use as buffer */
|
---|
969 | stdin_cnt = exitasap ? -1 : buffer_pread(0, lineptr, linemax);
|
---|
970 | if (stdin_cnt <= 0) { /* EOF or error on stdin */
|
---|
971 | exitasap = 1;
|
---|
972 | lineptr[0] = ch = '\n';
|
---|
973 | linelen = 1;
|
---|
974 | stdin_cnt = 1;
|
---|
975 | } else {
|
---|
976 | linelen = stdin_cnt;
|
---|
977 | np = memRchr(lineptr, '\n', stdin_cnt);
|
---|
978 | if (np)
|
---|
979 | linelen = np - lineptr + 1;
|
---|
980 | ch = lineptr[linelen-1];
|
---|
981 | }
|
---|
982 | /* linelen == no of chars incl. '\n' (or == stdin_cnt) */
|
---|
983 | for (i = 0; i < dirn; ++i) {
|
---|
984 | if (dir[i].fddir == -1) continue;
|
---|
985 | if (dir[i].matcherr == 'e')
|
---|
986 | ////full_write(2, lineptr, linelen);
|
---|
987 | fwrite(lineptr, 1, linelen, stderr);
|
---|
988 | if (dir[i].match != '+') continue;
|
---|
989 | buffer_pwrite(i, lineptr, linelen);
|
---|
990 | }
|
---|
991 | }
|
---|
992 |
|
---|
993 | stdin_cnt -= linelen;
|
---|
994 | if (stdin_cnt > 0) {
|
---|
995 | lineptr += linelen;
|
---|
996 | /* If we see another '\n', we don't need to read
|
---|
997 | * next piece of input: can print what we have */
|
---|
998 | np = memRchr(lineptr, '\n', stdin_cnt);
|
---|
999 | if (np)
|
---|
1000 | goto print_to_nl;
|
---|
1001 | /* Move unprocessed data to the front of line */
|
---|
1002 | memmove((timestamp ? line+26 : line), lineptr, stdin_cnt);
|
---|
1003 | }
|
---|
1004 | fflush(NULL);////
|
---|
1005 | }
|
---|
1006 |
|
---|
1007 | for (i = 0; i < dirn; ++i) {
|
---|
1008 | if (dir[i].ppid)
|
---|
1009 | while (!processorstop(&dir[i]))
|
---|
1010 | /* repeat */;
|
---|
1011 | logdir_close(&dir[i]);
|
---|
1012 | }
|
---|
1013 | return 0;
|
---|
1014 | }
|
---|