update date; copy current manpage to readme

[forkaftergrep.git] / README.md

diff --git a/README.md b/README.md
index afb351adf75f8f28c9609eb008d30cc8eae2b069..9791ba5fee8233e2b73cdec139940a05f9a954e2 100644 (file)
--- a/README.md
+++ b/README.md
@@ -10,11 +10,9 @@ SYNOPSIS
        fag [OPTIONS] PATTERN PROGRAM [ARGUMENTS...]
 
 DESCRIPTION
        fag [OPTIONS] PATTERN PROGRAM [ARGUMENTS...]
 
 DESCRIPTION

-       fag  searches  the PROGRAM for the string PATTERN.  This is useful if a
-       program takes a while to initialize and prints a message to  stdout  or
-       stderr  when ready. When placed in a script, fag blocks execution until
-       the pattern was found, then daemonizes the child process,  returns  the
-       PID on stdout and exits.
+       fag  uses  grep  to  search  the  output  of  PROGRAM  for  the regular
+       expression PATTERN and daemonizes it when a match is found. The PID  is
+       then returned on stdout.

 
 OPTIONS
    Behaviour Changing Options
 
 OPTIONS
    Behaviour Changing Options


@@ -27,6 +25,9 @@ OPTIONS
 
        -e     Search PATTERN on stderr instead of stdout.
 
 
        -e     Search PATTERN on stderr instead of stdout.
 

+       -V     Be verbose; print program's stdout (or stderr if -e is  set)  to
+              stderr.
+

    Generic Program Information
        -h     Output a short usage message and exit.
 
    Generic Program Information
        -h     Output a short usage message and exit.
 


@@ -34,20 +35,15 @@ OPTIONS
 
 EXIT STATUS
        If PATTERN was found, 0 is returned. Otherwise, the exit status follows
 
 EXIT STATUS
        If PATTERN was found, 0 is returned. Otherwise, the exit status follows

-       the  BSD  guideline  outlined  in  #include  <sysexits.h>  if the error
-       occured from within fag or in case the chid process exits  prematurely,
+       the BSD guideline  outlined  in  #include  <sysexits.h>  if  the  error
+       occured  from within fag or in case the chid process exits prematurely,

        its exit code is inherited. Notably, 69 is returned when the timeout is
        reached.
 
 BUGS
    Known Bugs
        its exit code is inherited. Notably, 69 is returned when the timeout is
        reached.
 
 BUGS
    Known Bugs

-       Only a simple string search is performed on PATTERN in this version.
-
-       If a PROGRAM like cat opens stdout/stderr, but never writes to it,  the
-       timeout isn't triggered.
-
-       SIGNAL needs to be given as an integer; mnemonic should be supported in
-       the future.
+       if  grep  exits  with a code > 0, fag should terminate with grep's exit
+       code and an error message. instead, fag exits as if a match was found.

 
        Sometimes, stdin behaves strange after the program terminates.
 
 
        Sometimes, stdin behaves strange after the program terminates.
 


@@ -56,15 +52,19 @@ BUGS
        https://github.com/girst/forkaftergrep/.
 
 NOTES
        https://github.com/girst/forkaftergrep/.
 
 NOTES

-       Some might find the name of this program offensive. Feel free to create
-       a symlink or alias on your system.
+       SIGNAL needs to be given as an integer. implementing mnemonics is dirty
+       and not very portable; maybe support in the future.

 
 COPYRIGHT
 
 COPYRIGHT

-       Copyright   2017   Tobias   Girstmair.   This  is  free  software;  see
+       Copyright  2017  Tobias  Girstmair.  This   is   free   software;   see

        https://www.gnu.org/licenses/gpl-3.0.html for conditions.
 
 AUTHOR
        Tobias Girstmair (http://isticktoit.net)
 
        https://www.gnu.org/licenses/gpl-3.0.html for conditions.
 
 AUTHOR
        Tobias Girstmair (http://isticktoit.net)
 

-1.0                            07 February 2017                         fag(1)
+1.0                             12 August 2017                          fag(1)

 ```
 ```

+
+## Notes
+
+I've written this program for the [`tzap`/`szap`](https://linuxtv.org/wiki/index.php/Zap) utilities. They take a few seconds until the TV card/stick is tuned, and won't fork off when they are ready (If you terminate them, the tuning will end). Instead of waiting a few seconds, and hoping for the best, this does the exactly right thing.