The first line backs up &0 (=stdin) to &10.
The next line associates &0 with the file (the file is opened for reading).
Then all following stdin/default reading is from the file. Here it is the read command in the loop.
The reading from the file would stop if &0 were restored via exec 0<&10.
Usually, instead of the exec association, you see a temporary association:
After the "redirected" while-do-done block the original stdin is back.
Hi All,
I have been fighting with a syntax error for the last 2 days, still haven't got the solution. Could you please help me, your help will be greatly appreciated.
In my script I am getting a error in a for loop, its similar to the one as is below.
for v_id in v1 v2 v3 v4
do... (8 Replies)
I get this error when I try to run my script
(BTW, this is a simple script I am supposed to write for my class)
$ menuscript
menuscript: syntax error at line 89 : `"' unmatched
$
Here is the code (Any help is greatly appreciated)
(Line numbers included)
1 #!/bin/ksh
2 ... (2 Replies)
I'm trying to write a small utility for syntax checking. I've tried using Flex/Bison, but these seem too advanced for my task. A simpler tool would be appreciated. (1 Reply)
hello everyone
i am beginner on shell scripting .and i am working on my project work on ad hoc network
i wrote a batch (.sh) to do a looping and execute a tcl script i wrote before in each iteration ..but i got this problem "
syntax error near unexpected token `('... (1 Reply)
Hello all!
This is my first post and I'm very new to programming. I would like help creating a simple perl or bash script that I will be using in my work as a junior bioinformatician.
Essentially, I would like to take a tab-delimted or .csv text with 3 columns and write them to a "3D" matrix:
... (16 Replies)
Hi guys i'd like to show you this code of my script, where i couldn't find this error
" #! /bin/bash
#copiabin.sh: copia todos los archivos ejecutables a bin
if
then
mkdir $HOME/bin
fi
# copia de archivos y contador N
N=0
for ARCH in *
do
if # Si el archivo es... (9 Replies)
Hi everyone, i'd like someone chechk this script, i know it's very simple but it doesn't work good, let me tell you this script works over huge directories, maybe that's the problem, if somebody can give me other way to develop, or show me where it's the problem, i'll appreciate it.
... (9 Replies)
I have a list of IP address and want to be assess whether FTP is allowing
FTP access. I don't want to use lousy NT shell, but cannot get the syntax down on this. ftphosts.txt is a simple list of IP adresses.
I want to iterate through the IPS and do a simple
ftp IPadress
user ftp password... (15 Replies)
Hi team,
I have two select statements and need to run them using SYSDBA user
select * from temp_temp_seg_usage;
select segment_name, tablespace_name, bytes/ (1024*1024) UsedMb from
dba_segments where segment_name='TEMP_TEMP_SEG_USAGE';
Need to run this using a shell script say named... (1 Reply)
#!/bin/bash
if ; then
echo "Lipsa IP";
exit;
fi
i=1
ip=$1
while ; do
if ; then
rand=`head -$i pass_file | tail -1`
user=`echo $rand | awk '{print $1}'`
pass=`echo $rand | awk '{print $2}'`
CMD=`ps -eaf | grep -c mysql`
if ; then
./mysql $ip $user $pass &
else
sleep 15... (6 Replies)
Discussion started by: galford
6 Replies
LEARN ABOUT OSX
tcl_getopenfile
Tcl_GetOpenFile(3) Tcl Library Procedures Tcl_GetOpenFile(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_GetOpenFile - Return a FILE* for a channel registered in the given interpreter (Unix only)
SYNOPSIS
#include <tcl.h>
int
Tcl_GetOpenFile(interp, chanID, write, checkUsage, filePtr)
ARGUMENTS
Tcl_Interp *interp (in) Tcl interpreter from which file handle is to be obtained.
const char *chanID (in) String identifying channel, such as stdin or file4.
int write (in) Non-zero means the file will be used for writing, zero means it will be used for reading.
int checkUsage (in) If non-zero, then an error will be generated if the file was not opened for the access indicated by
write.
ClientData *filePtr (out) Points to word in which to store pointer to FILE structure for the file given by chanID.
_________________________________________________________________DESCRIPTION
Tcl_GetOpenFile takes as argument a file identifier of the form returned by the open command and returns at *filePtr a pointer to the FILE
structure for the file. The write argument indicates whether the FILE pointer will be used for reading or writing. In some cases, such as
a channel that connects to a pipeline of subprocesses, different FILE pointers will be returned for reading and writing. Tcl_GetOpenFile
normally returns TCL_OK. If an error occurs in Tcl_GetOpenFile (e.g. chanID did not make any sense or checkUsage was set and the file was
not opened for the access specified by write) then TCL_ERROR is returned and the interpreter's result will contain an error message. In
the current implementation checkUsage is ignored and consistency checks are always performed.
Note that this interface is only supported on the Unix platform.
KEYWORDS
channel, file handle, permissions, pipeline, read, write
Tcl 8.0 Tcl_GetOpenFile(3)