6 accesslog - Access logger for ashd(7)
10 *accesslog* [*-hFa*] [*-f* 'FORMAT'] [*-p* 'PIDFILE'] 'OUTFILE' 'CHILD' ['ARGS'...]
15 The *accesslog* handler starts a single child handler which it passes
16 all requests it receives, but also logs information about every such
17 request to 'OUTFILE'. As for the format of the log records, see the
18 FORMAT section, below.
20 *accesslog* is a persistent handler, as defined in *ashd*(7), and the
21 specified child handler must also be a persistent handler.
23 If 'OUTFILE' is `-`, log records will be written on standard
24 output. Otherwise, the specified filename is opened in append mode and
25 kept open for as long as *accesslog* runs. SIGHUP can be sent to
26 *accesslog* in order to get it to reopen the log file, which can be
27 useful e.g. for log rotation.
29 If the child handler exits, *accesslog* exits as well.
36 Print a brief help message to standard output and exit.
40 Do not flush the log file buffers for each log record. (This
41 refers to the internal buffers, not the filesystem buffers.)
45 Use the specified 'FORMAT' string instead of the default log
46 record format. See the FORMAT section, below, for a
47 description of the 'FORMAT' string.
51 Write the PID of the *accesslog* to 'PIDFILE'. 'PIDFILE' may
52 be `-`, in which case the string "`.pid`" is appended to the
53 log file name and used instead.
57 Try to emulate the Apache "combined" log format as closely as
58 possible. Currently, the remote user, identd user, status code
59 and number of sent bytes in Apache's combined format are
60 replaced with dashes. Effectively, the following format string
64 %A - - [%{%d/%b/%Y:%H:%M:%S %z}t] "%m %u %v" - - "%R" "%G"
70 The log record format is specified with the *-f* option described
71 above. The format string is used as a template and certain fields are
72 expanded. Characters in the format string not matching such fields are
73 output as they are. A field is specified as a percent sign, followed
74 by an optional argument enclosed in braces, followed by a single
75 character specifying the item to log.
77 By default, the following format string is used:
80 %{%Y-%m-%d %H:%M:%S}t %m %u %A "%G"
83 The following log items are currently specified:
87 Expands into the HTTP header named by 'HEADER'. If the
88 specified header does not exist in the request, *%h* expands
93 Expands into the entire raw URL part of the request.
97 Expands into the raw URL part of the request, with any query
98 string removed if present.
102 Expands into the HTTP method.
106 Expands into the HTTP version string.
110 Expands into the current rest string.
114 Expands into the current time, in RFC822 format, unless there
115 is an argument present, in which case the argument is used as
116 a format string to *strftime*(3). The time is expressed in the
121 As for *%t*, but UTC time is used instead.
125 Expands into the non-integral fraction of the second of the
126 current time, expressed in microseconds and padded with zeroes
127 to 6 digits. For example, *%{%H:%M:%S}t.%s* can be used to log
132 Expands into the `X-Ash-Address` header.
136 Expands into the `Host` header.
140 Expands into the `Referer` header.
144 Expands into the `User-Agent` header.
146 In any expanded field, any "unsafe" characters are escaped. Currently,
147 this means that double-quotes and backslashes are prepended with a
148 backslash, newlines and tabs are expressed as, respectively, `\n` and
149 `\t`, and any other byte less than 32 or greater than 127 is expressed
150 as `\xAA`, where `AA` is the hexadecimal representation of the byte.
157 Reopen the log file by name. If the log file name cannot be
158 re-opened, the old log file stream continues in use.
162 Fredrik Tolf <fredrik@dolda2000.com>