Hello All,
I have a .csv file and I have to delete the selcted records stored in a vairable
e.g
echo $lname
7 88 91 94 97 100 103 106
I dont know how to pass the variable name to "sed" for deleting the $lname from a file
can any one help as this is very urgent.
$lname is changing the... (3 Replies)
Hi
I have a file & always I need to remove or delete last 2 lines from that file. So in a file if I have 10 lines then it should return me first 8 lines.
Can someone help me? (4 Replies)
I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about... (3 Replies)
We have a server that logs transactions to a file. I want to write a script that will delete the first 50 lines of the file daily without renameing the file or moving the file. (8 Replies)
I am trying to print 1st, 2nd, 13th and 14th fields of a file of line numbers from 29 to 10029. I dont know how to put this in one code. Currently I am removing the selected lines by
awk 'NR==29,NR==10029' File1 > File2
and then doing
awk '{print $1, $2, $13, $14}' File2 > File3
Can... (3 Replies)
I need to extract selected lines from a log file, I can use grep to pull one line matching 'x' or matching 'y', how can I run through the log printing both matching lines in order top to bottom.
i.e
line 1 xyz - not needed
line 2 User01 - needed
line 3 123 - not needed
line 4 Info - needed... (2 Replies)
Hi all,
I have a question for the Gurus. I apologize if this has bee shared before but I couldn't find the link.
I am trying to read parameters from an external parameter file. What I m trying to achieve is read selected lines from an external parameter file into the script. for eg my param... (4 Replies)
Hello,
I am using Awk in Ubuntu 12.04
First file: I have a file like this:
SNP1 1 198.2
SNP2 1 124.5
SNP3 1 124.4
.
.
.
Second file: I have another file like this:
SNP2
SNP5
SNP10
.
.
.
I want to create a third file like my first file but keeping ONLY the SNPs that... (8 Replies)
Discussion started by: Homa
8 Replies
LEARN ABOUT MINIX
tmpfile
TMPFILE(3) Linux Programmer's Manual TMPFILE(3)NAME
tmpfile - create a temporary file
SYNOPSIS
#include <stdio.h>
FILE *tmpfile(void);
DESCRIPTION
The tmpfile() function opens a unique temporary file in binary read/write (w+b) mode. The file will be automatically deleted when it is
closed or the program terminates.
RETURN VALUE
The tmpfile() function returns a stream descriptor, or NULL if a unique filename cannot be generated or the unique file cannot be opened.
In the latter case, errno is set to indicate the error.
ERRORS
EACCES Search permission denied for directory in file's path prefix.
EEXIST Unable to generate a unique filename.
EINTR The call was interrupted by a signal; see signal(7).
EMFILE The per-process limit on the number of open file descriptors has been reached.
ENFILE The system-wide limit on the total number of open files has been reached.
ENOSPC There was no room in the directory to add the new filename.
EROFS Read-only filesystem.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+----------+---------------+---------+
|Interface | Attribute | Value |
+----------+---------------+---------+
|tmpfile() | Thread safety | MT-Safe |
+----------+---------------+---------+
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2.
NOTES
POSIX.1-2001 specifies: an error message may be written to stdout if the stream cannot be opened.
The standard does not specify the directory that tmpfile() will use. Glibc will try the path prefix P_tmpdir defined in <stdio.h>, and if
that fails the directory /tmp.
SEE ALSO exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
2016-03-15 TMPFILE(3)