Unix Programming - How to read and write of a open file?

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How to read and write of a open file?

Total Answers and Comments: 3

Last Update: November 13, 2009 Asked by: Sivaram

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Best Rated Answer

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Submitted by: sarikamagdum

Read from file:

cat file_name

Or on terminal pagewise read as :

more file_name.

Write to file :

echo "`cmd`" > file_name.

Where cmd= any executable UNIX command.
> = redirect the o/p.
>> = append to file_name.

Above answer was rated as good by the following members:
getpreetam

November 22, 2006 05:32:21

muru

RE: How to read and write of a open file?

To read from a file: exec 5<&0 # standard input (your terminal) is denoted by file descriptor 0. It is assigned to 5 exec 0> samplefile # line is appended to samplefile done

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December 04, 2006 08:55:37

harish

RE: How to read and write of a open file?

we can use the read and write system call for thatread(fd buff BUF_SIZE);write(fd buff strlen(buff));assuming buff is a char string;

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November 12, 2009 10:07:38

sarikamagdum

Member Since: November 2009 Contribution: 1

RE: How to read and write of a open file?

Read from file:

cat file_name

Or on terminal pagewise read as :

more file_name.

Write to file :

echo "`cmd`" > file_name.

Where cmd any executable UNIX command.
> redirect the o/p.
>> append to file_name.

Is this answer useful? Yes | No

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