May 26, 2018

Small STDIN-to-file logger with support for log rotation

flog file logger is a small C program that reads input from STDIN and writes to a file, optionally adding timestamps. If SIGHUP is received, the file will be reopened, allowing for log rotation see newsyslog8. The log file will only be reopened if flog detects that rotation has occurred i.e., the old file is gone or the inode has changed. flog is extremely small a memory footprint of less than 500 bytes. It also protects you from running out of disk space; if that happens, the logfile will be truncated and a warning generated. This could save you from waking up to pager beeps in the middle of the night.

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