58 lines
1.2 KiB
Text
58 lines
1.2 KiB
Text
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.TH RATRACE 1
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.SH NAME
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ratrace \- trace process system calls
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.SH SYNOPSIS
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.B ratrace
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[
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.I pid
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] | [
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.I -c command
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]
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.SH DESCRIPTION
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.I Ratrace
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shows the system calls executed by a process,
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either the one with
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.I pid
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or a fresh invocation of
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.IR command .
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.PP
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Trace output is determined by the kernel, not
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.IR ratrace .
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Certain fixed rules apply.
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The first four fields of the output are
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pid, text name, system call name, and the PC of the user program.
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Data is always printed as
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.IB pointer /\c
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"\fIstring\fP",
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where the
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.I string
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is the first 32 bytes of the data, with
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.L \&.
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replacing non-printing ASCII characters
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(printing characters are those between ASCII space (SP) and delete (DEL), exclusive).
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Return values follow an
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.LR = ,
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and include the integer return value,
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the
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.I errstr
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(with "" if there is no
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.IR errstr ),
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and
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the start and stop times for the system call in nanoseconds.
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The times are exclusive of the overhead for tracing.
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.SH FILES
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.BI /proc/ pid /syscalltrace
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.br
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.BI /proc/ pid /ctl
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.SH SOURCE
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.B /sys/src/cmd/ratrace.c
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.SH "SEE ALSO"
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.IR acid (1),
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.IR db (1),
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.IR proc (3)
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.SH BUGS
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The printing of the data is too limited in length;
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printing
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.L \&.
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instead of something more sensible is limiting.
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