Hi,
I have attempted to backup some database files on my company's Solaris machine about 3 times now. Each time that I attempt the backup, about 6 files are evident on the dat tape when I do read of the media and then I see the dreaded "tar: write error unexpected EOF" message. Each time that I... (2 Replies)
I have datafile like
~dta.yunm
shhshsgggssssjsksjs
sggsjshsjsjssss
shshshhshshshs
i wish to take only first line and all other lines in concatenated form in second line what should I do???
output like
~dta.yunm
shhshsgggssssjsksjssggsjshsjsjssssshshshhshshshs
please tell me how... (7 Replies)
Hi Ladies and Gents,
Explanation of my question with an example:
Let's consider the script: backup_every_hour.sh
#!/bin/bash
rsync -auv $dir $backup_dir >> backup_every_hour_script.log
Each time this script is called there will be a new entry at the end of the file... (1 Reply)
Hello Everyone,
I need a help from experts of this community regarding one of the issue that I am facing with shell scripting.
My requirement is to append char's at the end of each line of a file. The char that will be appended is variable and will be passed through command line.
The... (20 Replies)
Hai
#!user/bin/perl
--------
--------
print("$line.......\n");
-------
------
I want to write inside $line into a file like run.log
How i can pleasw tel me
Thanks
kiran (4 Replies)
Hello,
I'm works on Ubuntu server
My goal : I would like to read file line per line, but i want to started at the end of file.
Currently, I use instructions :
while read line;
do
COMMAND
done < /var/log/apache2/access.log
But, the first line, i don't want this. The file is long... (5 Replies)
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
In the below perl I am trying to extract and print the values AF1=, the GT value, and F or QUAL diveded by 33 (rounded to the nearest whole #). The GT value is at the end after the GT:PL so all the possibilities are read into a hash h, then depending on the value that is in the line the... (1 Reply)
Hello all,
How can I find out the start and end of the writing file in the directory or recording time for writing file?
I have a directory where small ~ 1*MB temporary files are written.
After the end of the record, they are retrieved and erased.
I can only find out that the files are... (4 Replies)
Discussion started by: mrAibo
4 Replies
LEARN ABOUT ULTRIX
fopen
fopen(3s)fopen(3s)Name
fopen, freopen, fdopen - open a stream
Syntax
#include <stdio.h>
FILE *fopen (filename, type)
char *filename, *type;
FILE *freopen (filename, type, stream)
char *filename, *type;
FILE *stream;
FILE *fdopen (fildes, type)
int fildes;
char *type;
Description
The routine opens the file named by filename and associates a stream with it. The routine returns a pointer to the FILE structure associ-
ated with the stream.
The filename points to a character string that contains the name of the file to be opened.
The type is a character string having one of the following values:
"r" Open for reading
"w" Truncate or create for writing
"a" Append; open for writing at end of file, or create for writing
"A" Append with no overwrite; open for writing at end-of-file, or create for writing
"r+" Open for reading and writing
"w+" Truncate or create for reading and writing
"a+" Append; open or create for reading and writing at end-of-file
"A+" Append with no overwrite, open or create for update at end-of-file
The letter "b" can also follow r, w, or a. In some C implementations, the "b" is needed to indicate a binary file, however, it is not
needed in ULTRIX. If "+" is used, the "b" may occur on either side, as in "rb+" or "w+b".
The routine substitutes the named file in place of the open stream. The original stream is closed, regardless of whether the open ulti-
mately succeeds. The routine returns a pointer to the FILE structure associated with stream.
The routine is typically used to attach the preopened streams associated with stdin, stdout and stderr to other files.
The routine associates a stream with a file descriptor. File descriptors are obtained from or which open files but do not return pointers
to a FILE structure stream. Streams are necessary input for many of the Section 3s library routines. The type of stream must agree with
the mode of the open file.
When a file is opened for update, both input and output may be done on the resulting stream. However, output may not be directly followed
by input without an intervening or and input may not be directly followed by output without an intervening or an input operation which
encounters end-of-file.
When a file is opened for append with no overwrite (that is when type is "A" or "A+"), it is impossible to overwrite information already in
the file. The routine may be used to reposition the file pointer to any position in the file, but when output is written to the file, the
current file pointer is disregarded. All output is written at the end of the file and causes the file pointer to be repositioned at the
end of the output. If two separate processes open the same file for append, each process may write freely to the file without fear of
destroying output being written by the other. The output from the two processes will be intermixed in the file in the order in which it is
written.
Return Values
The and routines return a NULL pointer on failure.
Environment
SYSTEM_V
When your program is compiled using the System V environment, append with no overwrite is specified by using the "a" or "a+" type string,
and the "A" and "A+" type strings are not allowed.
POSIX
In the POSIX environment, the "a" and "a+" strings, and the "A" and "A+" strings specify append with no overwrite.
See Alsocreat(2), dup(2), open(2), pipe(2), fclose(3s), fseek(3s).
fopen(3s)