Is there a command that sets a variable length?
I have a input of a variable length field but my output for that field needs to be set to 32 char.
Is there such a command?
I am on a sun box running ksh
Thanks (2 Replies)
Hi ,
I have a peculiar case, where my sed command is working on a file which contains lines of small length.
sed "s/XYZ:1/XYZ:3/g" abc.txt > xyz.txt
when abc.txt contains lines of small length(currently around 80 chars) , this sed command is working fine.
when abc.txt contains lines of... (3 Replies)
Hello,
I am checking the length of each line of a fixed length file and making sure all lines are 161 length. My problem is that some files contain null characters which gets stripped out of my echo. How do I have the NULLs included in my check? (and I cannot replace or sub the NULL values with... (10 Replies)
Very, very new to unix scripting and have a unique situation. I have a file of records that contain 3 records types:
(H)eader Records
(D)etail Records
(T)railer Records
The Detail records are 82 bytes in length which is perfect. The Header and Trailer records sometimes are 82 bytes in... (3 Replies)
Hi,
Can anyone help with a effective solution ?
I need to change a variable length text field (between 1 - 18 characters) to a fixed length text of 18 characters with the unused portion, at the end, filled with spaces.
The text field is actually field 10 of a .csv file however I could cut... (7 Replies)
Hello Everyone,
I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table.
Input Data-
------ ------------------------ ---- -----------------
WFI001 Xxxxxx Control Work Item A Number of Records
------ ------------------------... (5 Replies)
Hello All,
I have this script that does stuff like "starting, stopping & restarting" a Daemon Process running on my machine...
My main question is why in part of my code (which you will see below) does the Array Length (i.e. ${#PIDS} )
return "1" when I know the Array is empty..?
Here is... (17 Replies)
Hi Team,
I have an issue to split the file which is having special chracter(German Char) using awk command.
I have a different length records in a file. I am separating the files based on the length using awk command.
The command is working fine if the record is not having any... (7 Replies)
Discussion started by: Anthuvan
7 Replies
LEARN ABOUT SUSE
truncate
TRUNCATE(3P) POSIX Programmer's Manual TRUNCATE(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
truncate - truncate a file to a specified length
SYNOPSIS
#include <unistd.h>
int truncate(const char *path, off_t length);
DESCRIPTION
The truncate() function shall cause the regular file named by path to have a size which shall be equal to length bytes.
If the file previously was larger than length, the extra data is discarded. If the file was previously shorter than length, its size is
increased, and the extended area appears as if it were zero-filled.
The application shall ensure that the process has write permission for the file.
If the request would cause the file size to exceed the soft file size limit for the process, the request shall fail and the implementation
shall generate the SIGXFSZ signal for the process.
This function shall not modify the file offset for any open file descriptions associated with the file. Upon successful completion, if the
file size is changed, this function shall mark for update the st_ctime and st_mtime fields of the file, and the S_ISUID and S_ISGID bits of
the file mode may be cleared.
RETURN VALUE
Upon successful completion, truncate() shall return 0. Otherwise, -1 shall be returned, and errno set to indicate the error.
ERRORS
The truncate() function shall fail if:
EINTR A signal was caught during execution.
EINVAL The length argument was less than 0.
EFBIG or EINVAL
The length argument was greater than the maximum file size.
EIO An I/O error occurred while reading from or writing to a file system.
EACCES A component of the path prefix denies search permission, or write permission is denied on the file.
EISDIR The named file is a directory.
ELOOP A loop exists in symbolic links encountered during resolution of the path argument.
ENAMETOOLONG
The length of the path argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}.
ENOENT A component of path does not name an existing file or path is an empty string.
ENOTDIR
A component of the path prefix of path is not a directory.
EROFS The named file resides on a read-only file system.
The truncate() function may fail if:
ELOOP More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the path argument.
ENAMETOOLONG
Pathname resolution of a symbolic link produced an intermediate result whose length exceeds {PATH_MAX}.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
open(), the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 TRUNCATE(3P)