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0bb6f3d4 FT |
1 | accesslog(1) |
2 | ============ | |
3 | ||
4 | NAME | |
5 | ---- | |
6 | accesslog - Access logger for ashd(7) | |
7 | ||
8 | SYNOPSIS | |
9 | -------- | |
ca170d77 | 10 | *accesslog* [*-hFaL*] [*-f* 'FORMAT'] [*-p* 'PIDFILE'] 'OUTFILE' 'CHILD' ['ARGS'...] |
602135b0 | 11 | |
ca170d77 | 12 | *accesslog* *-P* 'LOGFILE' |
0bb6f3d4 FT |
13 | |
14 | DESCRIPTION | |
15 | ----------- | |
16 | ||
17 | The *accesslog* handler starts a single child handler which it passes | |
18 | all requests it receives, but also logs information about every such | |
19 | request to 'OUTFILE'. As for the format of the log records, see the | |
20 | FORMAT section, below. | |
21 | ||
22 | *accesslog* is a persistent handler, as defined in *ashd*(7), and the | |
23 | specified child handler must also be a persistent handler. | |
24 | ||
25 | If 'OUTFILE' is `-`, log records will be written on standard | |
26 | output. Otherwise, the specified filename is opened in append mode and | |
27 | kept open for as long as *accesslog* runs. SIGHUP can be sent to | |
28 | *accesslog* in order to get it to reopen the log file, which can be | |
29 | useful e.g. for log rotation. | |
30 | ||
31 | If the child handler exits, *accesslog* exits as well. | |
32 | ||
ca170d77 FT |
33 | Normally, *accesslog* locks the logfile using *fcntl*(2) to ensure |
34 | that only one process writes to a logfile at any time. The *-L* switch | |
35 | can be used to override that behavior to let several processes share a | |
36 | logfile, or to use logfiles that cannot be locked for some reason. | |
37 | ||
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38 | OPTIONS |
39 | ------- | |
40 | ||
41 | *-h*:: | |
42 | ||
43 | Print a brief help message to standard output and exit. | |
44 | ||
45 | *-F*:: | |
46 | ||
47 | Do not flush the log file buffers for each log record. (This | |
48 | refers to the internal buffers, not the filesystem buffers.) | |
49 | ||
50 | *-f* 'FORMAT':: | |
51 | ||
52 | Use the specified 'FORMAT' string instead of the default log | |
53 | record format. See the FORMAT section, below, for a | |
54 | description of the 'FORMAT' string. | |
55 | ||
472abd3c FT |
56 | *-p* 'PIDFILE':: |
57 | ||
58 | Write the PID of the *accesslog* to 'PIDFILE'. 'PIDFILE' may | |
59 | be `-`, in which case the string "`.pid`" is appended to the | |
60 | log file name and used instead. | |
61 | ||
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62 | *-a*:: |
63 | ||
64 | Try to emulate the Apache "combined" log format as closely as | |
65 | possible. Currently, the remote user, identd user, status code | |
66 | and number of sent bytes in Apache's combined format are | |
67 | replaced with dashes. Effectively, the following format string | |
68 | is used: | |
69 | ||
70 | -------- | |
71 | %A - - [%{%d/%b/%Y:%H:%M:%S %z}t] "%m %u %v" - - "%R" "%G" | |
72 | -------- | |
73 | ||
ca170d77 FT |
74 | *-L*:: |
75 | ||
76 | Do not attempt to lock the logfile. Note that this switch | |
77 | conflicts with the use of the *-P* option. | |
78 | ||
79 | *-P* 'LOGFILE':: | |
80 | ||
81 | Makes *accesslog* fetch the PID of the process currently | |
82 | holding the lock on 'LOGFILE', write that to standard output, | |
83 | and then exit. No further command-line arguments are | |
84 | processed. This option is useful for sending SIGHUP to | |
85 | accesslog when rotating logfiles without having to use a PID | |
86 | file. | |
87 | ||
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88 | FORMAT |
89 | ------ | |
90 | ||
91 | The log record format is specified with the *-f* option described | |
92 | above. The format string is used as a template and certain fields are | |
93 | expanded. Characters in the format string not matching such fields are | |
94 | output as they are. A field is specified as a percent sign, followed | |
95 | by an optional argument enclosed in braces, followed by a single | |
96 | character specifying the item to log. | |
97 | ||
98 | By default, the following format string is used: | |
99 | ||
100 | -------- | |
101 | %{%Y-%m-%d %H:%M:%S}t %m %u %A "%G" | |
102 | -------- | |
103 | ||
104 | The following log items are currently specified: | |
105 | ||
106 | *%{*'HEADER'*}h*:: | |
107 | ||
108 | Expands into the HTTP header named by 'HEADER'. If the | |
109 | specified header does not exist in the request, *%h* expands | |
110 | into a dash. | |
111 | ||
112 | *%u*:: | |
113 | ||
114 | Expands into the entire raw URL part of the request. | |
115 | ||
116 | *%U*:: | |
117 | ||
118 | Expands into the raw URL part of the request, with any query | |
119 | string removed if present. | |
120 | ||
121 | *%m*:: | |
122 | ||
123 | Expands into the HTTP method. | |
124 | ||
125 | *%v*:: | |
126 | ||
127 | Expands into the HTTP version string. | |
128 | ||
129 | *%r*:: | |
130 | ||
131 | Expands into the current rest string. | |
132 | ||
133 | *%t*:: | |
134 | ||
135 | Expands into the current time, in RFC822 format, unless there | |
136 | is an argument present, in which case the argument is used as | |
137 | a format string to *strftime*(3). The time is expressed in the | |
138 | local timezone. | |
139 | ||
140 | *%T*:: | |
141 | ||
142 | As for *%t*, but UTC time is used instead. | |
143 | ||
144 | *%s*:: | |
145 | ||
146 | Expands into the non-integral fraction of the second of the | |
147 | current time, expressed in microseconds and padded with zeroes | |
148 | to 6 digits. For example, *%{%H:%M:%S}t.%s* can be used to log | |
149 | fractional time. | |
150 | ||
151 | *%A*:: | |
152 | ||
153 | Expands into the `X-Ash-Address` header. | |
154 | ||
155 | *%H*:: | |
156 | ||
157 | Expands into the `Host` header. | |
158 | ||
159 | *%R*:: | |
160 | ||
161 | Expands into the `Referer` header. | |
162 | ||
163 | *%G*:: | |
164 | ||
165 | Expands into the `User-Agent` header. | |
166 | ||
167 | In any expanded field, any "unsafe" characters are escaped. Currently, | |
168 | this means that double-quotes and backslashes are prepended with a | |
169 | backslash, newlines and tabs are expressed as, respectively, `\n` and | |
170 | `\t`, and any other byte less than 32 or greater than 127 is expressed | |
171 | as `\xAA`, where `AA` is the hexadecimal representation of the byte. | |
172 | ||
173 | SIGNALS | |
174 | ------- | |
175 | ||
176 | SIGHUP:: | |
177 | ||
178 | Reopen the log file by name. If the log file name cannot be | |
179 | re-opened, the old log file stream continues in use. | |
180 | ||
181 | AUTHOR | |
182 | ------ | |
183 | Fredrik Tolf <fredrik@dolda2000.com> | |
184 | ||
185 | SEE ALSO | |
186 | -------- | |
187 | *ashd*(7) |