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 MINIX
fopen
FOPEN(3) Library Functions Manual FOPEN(3)NAME
fopen, freopen, fdopen - open a stream
SYNOPSIS
#include <stdio.h>
FILE *fopen(const char *filename, const char *type)
FILE *freopen(const char *filename, const char *type, FILE *stream)
FILE *fdopen(int fildes, const char *type)
DESCRIPTION
Fopen opens the file named by filename and associates a stream with it. Fopen returns a pointer to be used to identify the stream in sub-
sequent operations.
Type is a character string having one of the following values:
"r" open for reading
"w" create for writing
"a" append: open for writing at end of file, or create for writing
In addition, each type may be followed by a "+" to have the file opened for reading and writing. "r+" positions the stream at the begin-
ning of the file, "w+" creates or truncates it, and "a+" positions it at the end. Both reads and writes may be used on read/write streams,
with the limitation that an fseek, rewind, or reading an end-of-file must be used between a read and a write or vice-versa.
Freopen substitutes the named file in place of the open stream. It returns the original value of stream. The original stream is closed.
Freopen is typically used to attach the preopened constant names, stdin, stdout, stderr, to specified files.
Fdopen associates a stream with a file descriptor obtained from open, dup, creat, or pipe(2). The type of the stream must agree with the
mode of the open file.
SEE ALSO open(2), fclose(3).
DIAGNOSTICS
Fopen and freopen return the pointer NULL if filename cannot be accessed, if too many files are already open, or if other resources needed
cannot be allocated.
BUGS
Fdopen is not portable to systems other than UNIX.
The read/write types do not exist on all systems. Those systems without read/write modes will probably treat the type as if the "+" was
not present. These are unreliable in any event.
4th Berkeley Distribution May 27, 1986 FOPEN(3)