Perform action file name written to the pipe Post: 302173862

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Top Forums Shell Programming and Scripting Perform action file name written to the pipe Post 302173862 by fed.linuxgossip on Saturday 8th of March 2008 01:23:59 PM

03-08-2008

Registered User

Perform action file name written to the pipe

Hello,

I have a script that monitors files uploaded via ftp. After a successful upload, the file name is written to the pipe.

There is another program that reads this pipe and allows automatically run any program or script ( say test.sh ) to process the newly uploaded file.

cat test.sh
#############
mail -s mail -s "New upload : $1" test@test.tld

will email the filename to external email address.

now in test.sh I want to perform multiple functions:

1) email the uploaded file name ( which is done above )

2) grep/awk etc, for a string or word in the uploaded file and then

if

the exact word or string is found

then

do

grep -nr "$pattern" $1
echo " Following pattern found in file" $1 at line number >> /root/upload.log
/bin/rm -fr $1

else
echo "File safe: " $1 >> /root/upload.log

Now the pattern or word can be anyone of the following:

porn viagara cannibal maneater herbivore verygood millioniare donkey

so pattern is something like

pattern='porn|viagara|cannibal|maneater|herbivore|verygood|millioniare|donkey'

Please advise.

Thanks

fed.linuxgossip

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LEARN ABOUT OPENDARWIN

pipe

PIPE(2) 						      BSD System Calls Manual							   PIPE(2)

NAME

     pipe -- create descriptor pair for interprocess communication

SYNOPSIS

     #include <unistd.h>

     int
     pipe(int *fildes);

DESCRIPTION

     The pipe() function creates a pipe, which is an object allowing unidirectional data flow, and allocates a pair of file descriptors.  The
     first descriptor connects to the read end of the pipe, and the second connects to the write end, so that data written to fildes[1] appears on
     (i.e., can be read from) fildes[0].  This allows the output of one program to be sent to another program: the source's standard output is set
     up to be the write end of the pipe, and the sink's standard input is set up to be the read end of the pipe.  The pipe itself persists until
     all its associated descriptors are closed.

     A pipe whose read or write end has been closed is considered widowed.  Writing on such a pipe causes the writing process to receive a SIGPIPE
     signal.  Widowing a pipe is the only way to deliver end-of-file to a reader: after the reader consumes any buffered data, reading a widowed
     pipe returns a zero count.

RETURN VALUES

     On successful creation of the pipe, zero is returned. Otherwise, a value of -1 is returned and the variable errno set to indicate the error.

ERRORS

     The pipe() call will fail if:

     [EMFILE]		Too many descriptors are active.

     [ENFILE]		The system file table is full.

     [EFAULT]		The fildes buffer is in an invalid area of the process's address space.

SEE ALSO

     sh(1), read(2), write(2), fork(2), socketpair(2)

HISTORY

     A pipe() function call appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution					   June 4, 1993 					 4th Berkeley Distribution