IMK

Simple file watcher similar to fswatch or inotify-wait that works both in linux and *BSD.

Install

make release && sudo make install clean

to build and install a statically linked version:

make static && sudo make install clean

To build a small static binary, the musl libc can be used as follows:

$ make static CC=musl-gcc && sudo make install clean
rm -f *.core
rm -f build_host.h
rm -f imk
rm -rf ./obj
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/files.o -c files.c
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/log.o -c log.c
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/main.o -c main.c
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/cmd.o -c cmd.c
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/cfg.o -c cfg.c
musl-gcc -D_DEFAULT_SOURCE -Werror -Wall  -std=c99 -pedantic -static -O3 -o obj/poll_linux.o -c compat/poll_linux.c
musl-gcc -static -o imk obj/files.o obj/log.o obj/main.o obj/cmd.o obj/cfg.o obj/poll_linux.o
strip imk
install -o root -g root -m 755 imk /usr/local/bin/
rm -f *.core
rm -f build_host.h
rm -f imk
rm -rf ./obj

$ ls -alh /usr/local/bin/imk
-rwxr-xr-x 1 root root 70K May 18 16:49 /usr/local/bin/imk

$ file /usr/local/bin/imk
/usr/local/bin/imk: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped

Usage

$ ./imk -h
usage: ./imk -c <command> [options] <file/dir ...>

   The options are as follows:
      -c <cmd>   - command to execute when event is triggered
      -d <cmd>   - teardown command to execute when -k timeout occurs (assumes -w). The PID is available in CMD_PID environment variable.
      -i         - run the command immediately before waiting for changes
      -h         - display this text and exit
      -k <ms>    - timeout after which to kill the command subproces (default - do not kill. Assumes -w.)
      -o         - exit after the first iteration
      -r         - if a directory is supplied, add all its sub-directories as well
      -s         - do not wrap the command in a shell (assumes -w)
      -S <ms>    - number of ms to sleep before reattaching in case of DELETE event (default 300)
      -t <sec>   - number of seconds to skip after the last executed command (default 0)
      -v         - display the version [<version>]
      -w         - spawn a subprocess for command (if not specified imk runs the command in a libc system() which wraps the command in a shell like: sh -c 'cmd')
      <file/dir ...> - list of files or folders to monitor

   Please use quotes around the command and teardown command if it is composed of multiple words

To monitor all .c files and run make run the following:

$ ./imk -c 'make release' *.c
:: [20:00:00] start monitoring: cmd[make release] files[log.c main.c]

If any of the monitored files are modified, the command will be executed.

Known Issues:

• when monitoring a directory, the command may be triggered more then once for every change of the contained files.
• imk may not detect a change if the monitored file was edited with VIM with swapfiles enabled.