X-Reportbug-Version: 4.2
X-Debbugs-Cc: philipp.ma...@emerion.com
Package: strace
Version: 4.5.18-1
Severity: normal
I'm sometimes using strace to debug long-running processes, by looking into
the log files from time to time.
When they grow, I'd like to truncate them, so that effectively a new logfile
(for the same process) is started.
But that doesn't really work, because strace opens the output file without
O_APPEND:
# strace -e open strace -o /tmp/log true
open(/etc/ld.so.cache, O_RDONLY) = 3
open(/lib/libc.so.6, O_RDONLY)= 3
open(/dev/urandom, O_RDONLY) = 3
open(/tmp/log, O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
So when I truncate the logfile, the file position is the same, and everything
before the next write is filled with \0.
As for all log files the correct way would be to use O_APPEND (at least IMO).
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.29-1-amd64 (SMP w/1 CPU core)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages strace depends on:
ii libc6 2.9-12 GNU C Library: Shared libraries
strace recommends no packages.
strace suggests no packages.
-- no debconf information
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