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RTail
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| #!/usr/bin/env python | |
| """ | |
| Usage: | |
| ./rtail.py user@host:port:path/foo.log bar.log host2:port:/path/baz.log | |
| """ | |
| import optparse | |
| import os | |
| import re | |
| import select | |
| import subprocess | |
| import sys | |
| import time | |
| def main(): | |
| op = optparse.OptionParser() | |
| options, args = op.parse_args() | |
| streams = list() | |
| for arg in args: | |
| if re.match(r"^(.+@)?[a-zA-Z0-9.-]+:.+", arg): | |
| # this is a remote location | |
| hostname, port, path = arg.split(":", 2) | |
| s = subprocess.Popen(["ssh", "-v", "-p", port, hostname, "tail -f " + path], stdout=subprocess.PIPE) | |
| s.name = arg | |
| streams.append(s) | |
| else: | |
| s = subprocess.Popen(["tail", "-f", arg], stdout=subprocess.PIPE) | |
| s.name = arg | |
| streams.append(s) | |
| lastName = None | |
| while True: | |
| r, _, _ = select.select( | |
| [stream.stdout.fileno() for stream in streams], [], []) | |
| for fileno in r: | |
| for stream in streams: | |
| if stream.stdout.fileno() != fileno: | |
| continue | |
| data = os.read(fileno, 4096) | |
| if not data: | |
| streams.remove(stream) | |
| break | |
| if stream.name != lastName: | |
| print "%s:" % stream.name | |
| lastName = stream.name | |
| sys.stdout.write(data) | |
| break | |
| if __name__ == "__main__": | |
| main() |
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