loghup version 0.1

Usage: loghup [options] -- <command>

Options:
    -h         Show this help
    -o <path>  Log stdout to <path>
    -e <path>  Log stderr to <path>
    -s <sig#>  Trap <sig#> instead of SIGHUP (1)
    -f         Forward signal to child process

loghup execs <command> and captures its stdout and stderr at the paths specified by -o and -e respectively. When loghup receives a SIGHUP (or other signal specified by -s), it closes and reopens these log handles (useful for log rotation). If -f is specified, the signal is forwarded to the child process.

Note that is mainly useful for legacy apps that don't manage their own logging and/or only write to stdout/stderr. If you are writing something from scratch, consider using something like log4j.

Also note that there is a small overhead for copying log data over pipes that one could avoid entirely by logging directly to disk from your process.

Nevertheless, see the TODO section for some ideas that may make this program useful in other scenarios.

$ make
$ make install # optional

• Ability to open extra file descriptors for child proc to write to, e.g., stddebug, stdlol, etc.
• A read-from-stdin mode
• An option to tee to stdout/stderr in addition to log files
• An option to disable signal trapping
• Try the splice syscall instead of read/write if available