10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
i was tried using the awk command for replacing '-' in the second column. but the below command replacing the entire file.
cat 1.txt |awk '{gsub(/-/,"")}1'
Input file
1,2,3,-4,5,6
1,-2,3,4,5,-6
1,2,3,4,5,6
1,-2,3,4,-5,6
Output file
1,2,3,-4,5,6
1,2,3,4,5,-6
1,2,3,4,5,6... (3 Replies)
Discussion started by: onesuri
3 Replies
2. Shell Programming and Scripting
Hello,
I'm strugling with some redirecting and all help is apreciated.
The following program is working as expected, but the result of the AT command doesn't go to any file.
Thanks in advance for the help.
#!/bin/bash
modem=/dev/ttyUSB1
file=/root/imsi.txt
# print error to stderr and exit... (4 Replies)
Discussion started by: cleitao
4 Replies
3. Shell Programming and Scripting
Hi,
Please help with this.
I have several excel files (with and .xlsx format) with 10-15 columns each.
They all have the same type of data but the columns are not ordered in the same way.
Here is a 3 column example. What I want to do add the alphabet
from column 2 to column 3, provided... (9 Replies)
Discussion started by: newbie83
9 Replies
4. Shell Programming and Scripting
Hello,
I have some tab delimited data and I need to move the last col. I could hard code it,
awk '{ print $1,$NF,$2,$3,$4,etc }' infile > outfile
but it would be nice to know the syntax to print a range cols.
I know in cut you can do,
cut -f 1,4-8,11-
to print fields 1,... (8 Replies)
Discussion started by: LMHmedchem
8 Replies
5. UNIX for Advanced & Expert Users
Hello everyone,
I am writing a script to process data from the ATP world tour.
I have a file which contains:
t=540 y=2011 r=1 p=N409
t=540 y=2011 r=2 p=N409
t=540 y=2011 r=3 p=N409
t=540 y=2011 r=4 p=N409
t=520 y=2011 r=1 p=N409
t=520 y=2011 r=2 p=N409
t=520 y=2011 r=3 p=N409
The... (4 Replies)
Discussion started by: imahmoud
4 Replies
6. Shell Programming and Scripting
can anyone help me in making singleline command for
Capital Letters are folders ,small letter are files
X,Y,Z are subfolders of A
as shown below
A - X,Y,Z
Folder X has three files a.txt,b.txt,c.txt similarly Y,Z.
as shown below
X- a.txt,b.txt,c.txt
Y- a.txt,b.txt,c.txt
Z-... (4 Replies)
Discussion started by: phoenix_nebula
4 Replies
7. Programming
Hi,
Currently my STDOUT is configured as tty0,
Is there a way to change it during runtime?
I need to use this serial for other external device
Thanks,
Alex (2 Replies)
Discussion started by: alex889
2 Replies
8. UNIX for Dummies Questions & Answers
Hello every1.
Can any1 help me with the col command.
Wat is a reverse line feed.
Which kind of files u need to use the col command. (2 Replies)
Discussion started by: rahulrathod
2 Replies
9. UNIX for Advanced & Expert Users
Hi All,
I am talking about unix col(1) command used for some reverse line filtering etc.
And I notice that the stdout of this command is line buffered i.e. the stdout will flush the data in its buffer line by line. So the number of writes performed by stdout are more.
So now if I make stdout... (0 Replies)
Discussion started by: sunilsbjoshi
0 Replies
10. UNIX for Advanced & Expert Users
Hello Can Any1 tell me the difference between the col command and the col command with the -f option.
I tried running both of them but i can't see any difference.
Please guide me. (1 Reply)
Discussion started by: rahulrathod
1 Replies
setbuf(3s) setbuf(3s)
Name
setbuf, setbuffer, setlinebuf, setvbuf - assign buffering to a stream
Syntax
#include <stdio.h>
void setbuf(stream, buf)
FILE *stream;
char *buf;
void setbuffer(stream, buf, size)
FILE *stream;
char *buf;
int size;
void setlinebuf(stream)
FILE *stream;
int setvbuf(stream, buf, type, size)
FILE *stream;
char *buf;
int type; size_t size;
Description
The three types of buffering available are unbuffered, block buffered, and line buffered. When an output stream is unbuffered, information
appears on the destination file or terminal as soon as written; when it is block buffered many characters are saved up and written as a
block; when it is line buffered characters are saved up until a new line is encountered or input is read from stdin. The routine may be
used to force the block out early. Normally all files are block buffered. For further information, see A buffer is obtained from upon the
first or on the file. If the standard stream stdout refers to a terminal it is line buffered. The standard stream stderr is always
unbuffered.
The routine is used after a stream has been opened but before it is read or written. The character array buf is used instead of an auto-
matically allocated buffer. If buf is the constant pointer NULL, input/output will be completely unbuffered. A manifest constant BUFSIZ
tells how big an array is needed:
char buf[BUFSIZ];
The routine, an alternate form of is used after a stream has been opened but before it is read or written. The character array buf whose
size is determined by the size argument is used instead of an automatically allocated buffer. If buf is the constant pointer NULL,
input/output will be completely unbuffered.
The routine is used to change stdout or stderr from block buffered or unbuffered to line buffered. Unlike and it can be used at any time
that the file descriptor is active.
The routine may be used after a stream has been opened but before it is read or written. Type determines how stream will be buffered.
Legal values for type, defined in stdio.h are:
_IOFBF causes input/output to be fully buffered.
_IOLBF causes output to be line buffered; the buffer will be flushed when a new line is written, the buffer is full, or input is
requested.
_IONBF causes input/output to be completely unbuffered.
If buf is not the NULL pointer, the array it points to will be used for buffering, instead of an automatically allocated buffer. The size
specifies the size of the buffer to be used. The constant BUFSIZ in <stdio.h> is suggested as a good buffer size. If input/output is
unbuffered, buf and size are ignored.
By default, output to a terminal is line buffered and all other input/output is fully buffered.
A file can be changed from unbuffered or line buffered to block buffered by using For further information, see A file can be changed from
block buffered or line buffered to unbuffered by using followed by with a buffer argument of NULL.
Restrictions
The standard error stream should be line buffered by default.
The and functions are not portable to non 4.2 BSD versions of UNIX.
See Also
malloc(3), fclose(3s), fopen(3s), fread(3s), getc(3s), printf(3s), putc(3s), puts(3s).
setbuf(3s)