I have a simple script like this:
for file in $dodfiles; do
./rundod $file
done
$dodfiles is an array of file names selected
rundod is a script which invokes a java progrm which process a data file
all the processing message logged into a log file
in order to extract and analyze the... (1 Reply)
Hey all,
My boss tasked me with the job to write a script which would invoke various java programs, the thing is I don't know much about shell scripting so would you experts help me out?
Here is the requirement
- 2 applications written in java: App_A and App_B
-... (0 Replies)
How can i invoke java program from MC1, when I connect remotely to execute can I set classpath etc.
____________ <-------------->____________________
|..................|<-------------->|...............................|
|..................|<-------------->|...............................|... (2 Replies)
Hi,
I am using Send Keys to connect to UNIX server and invoke a script .
Is there an alternate way to connect to UNIX server using Excel macro and invoke a UNIX Shell script?
Anu (2 Replies)
Hi all,
I am using an external binary to view memory starting from a specific address and i want to automate this via PERL however there are problems. Hope you can help me ..thx
The output of the programme is like below:
bash-3.2$ mem_disp 12B21D20 100
Opening RO Data Memory File scp.ro... (4 Replies)
Hi,
I have create a Shell Script, with one function.
I want to call the script file in Java Program.
It working fine. but the problem is the function in the Shell Script is not executed.
Please suggest me,
Regards,
Nanthagopal A (2 Replies)
Discussion started by: nanthagopal
2 Replies
LEARN ABOUT MOJAVE
pclose
POPEN(3) BSD Library Functions Manual POPEN(3)NAME
pclose, popen -- process I/O
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
FILE *
popen(const char *command, const char *mode);
int
pclose(FILE *stream);
DESCRIPTION
The popen() function ``opens'' a process by creating a bidirectional pipe, forking, and invoking the shell. Any streams opened by previous
popen() calls in the parent process are closed in the new child process. Historically, popen() was implemented with a unidirectional pipe;
hence, many implementations of popen() only allow the mode argument to specify reading or writing, not both. Because popen() is now imple-
mented using a bidirectional pipe, the mode argument may request a bidirectional data flow. The mode argument is a pointer to a null-termi-
nated string which must be 'r' for reading, 'w' for writing, or 'r+' for reading and writing.
The command argument is a pointer to a null-terminated string containing a shell command line. This command is passed to /bin/sh, using the
-c flag; interpretation, if any, is performed by the shell.
The return value from popen() is a normal standard I/O stream in all respects, save that it must be closed with pclose() rather than
fclose(). Writing to such a stream writes to the standard input of the command; the command's standard output is the same as that of the
process that called popen(), unless this is altered by the command itself. Conversely, reading from a ``popened'' stream reads the command's
standard output, and the command's standard input is the same as that of the process that called popen().
Note that output popen() streams are fully buffered, by default.
The pclose() function waits for the associated process to terminate; it returns the exit status of the command, as returned by wait4(2).
RETURN VALUES
The popen() function returns NULL if the fork(2) or pipe(2) calls fail, or if it cannot allocate memory.
The pclose() function returns -1 if stream is not associated with a ``popened'' command, if stream already ``pclosed'', or if wait4(2)
returns an error.
ERRORS
The popen() function does not reliably set errno.
SEE ALSO sh(1), fork(2), pipe(2), wait4(2), fclose(3), fflush(3), fopen(3), stdio(3), system(3)BUGS
Since the standard input of a command opened for reading shares its seek offset with the process that called popen(), if the original process
has done a buffered read, the command's input position may not be as expected. Similarly, the output from a command opened for writing may
become intermingled with that of the original process. The latter can be avoided by calling fflush(3) before popen().
Failure to execute the shell is indistinguishable from the shell's failure to execute command, or an immediate exit of the command. The only
hint is an exit status of 127.
The popen() function always calls sh(1), never calls csh(1).
HISTORY
A popen() and a pclose() function appeared in Version 7 AT&T UNIX.
Bidirectional functionality was added in FreeBSD 2.2.6.
BSD May 3, 1995 BSD