Sponsored Content
Full Discussion: append character to a file
Top Forums Programming append character to a file Post 302120978 by enuenu on Monday 11th of June 2007 04:53:41 AM
Old 06-11-2007
Quote:
Originally Posted by porter
either

Code:
FILE *fp=fopen(filename,"a");
fputc('q',fp);
fclose(fp);

So it seems it is the way you open the file that determines whether the new stuff will overwrite what is there or be appended to it.
I have been using;
Code:
FILE *fp=fopen(filename,"w");
fputc('q',fp);
fclose(fp);

I should use;
Code:
FILE *fp=fopen(filename,"a");
fputc('q',fp);
fclose(fp);

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Using SED to append character to each line

Hey - my first post here, and I'm a total SED newb. I've looked around for previous help on this, but have so far been unsuccessful. I have a program (AMStracker for OS X) that outputs data in the terminal. Output is in this form: . . . 3 0 -75 3 0 -76 3 0 -77 ... (4 Replies)
Discussion started by: c0nn0r
4 Replies

2. UNIX for Dummies Questions & Answers

How to Replace,Sort,and Append Character one script

Hi all i am very new to shell scripting,hope u guys can help i need to replace,sort and append character for the file that look like this: 1007032811010001000100000001X700026930409 1007032811010001000200000002X700026930409 1007032711020001000300000003X700026930409... (2 Replies)
Discussion started by: ashikin_8119
2 Replies

3. Shell Programming and Scripting

append a character at end of each line of a file

Hi, i want to append a character '|' at end of each line of a file abc.txt. for example if the file abc.txt conatins: a|b|c 1|2|33 w|2|11 i want result file xyz.txt a|b|c| 1|2|33| w|2|11| I know this is simple but sumhow i am not able to reach end of line. its urgent, thanks for... (4 Replies)
Discussion started by: muaz
4 Replies

4. Shell Programming and Scripting

Sed append newline character

Hi All, I am new to Shell scripting.. I have a task to parse the text file into csv format. more then half the things has done. But the problem is when I use the sed command in shell script. it appends newline character at the end of the line. and so when I open the file in CSV it's format... (3 Replies)
Discussion started by: Gaurang033
3 Replies

5. Shell Programming and Scripting

How do I append a ^M to the end of each 129 character string

Hello all, I have a stumper of a problem. I am trying to append a ^M or "newline" to the end of each 129 character string in a huge file in unix. Each string starts with A00. I am trying to get the file to go from... A00vswjdv1 Test Junk Junk A00vswjdv2 Test Junk Junk ... (6 Replies)
Discussion started by: Captain
6 Replies

6. HP-UX

How to remove new line character and append new line character in a file?

Hi Experts, I have data coming in 4 columns and there are new line characters \n in between the data. I need to remove the new line characters in the middle of the row and keep the \n character at the end of the line. File is comma (,) seperated. Eg: ID,Client ,SNo,Rank 37,Airtel \n... (8 Replies)
Discussion started by: sasikari
8 Replies

7. Shell Programming and Scripting

Find string in a file and append character

Hi Experts, Is there a way to find a string in a file then append a character to that string then save the file or save to another file. Here is an example. >cat test.txt NULL NULL NULL 9,800.00 NULL 1,234,567.01 I want to find all NON NULL String and add a dollar sign to those... (9 Replies)
Discussion started by: brichigo
9 Replies

8. Shell Programming and Scripting

To append Character in file

hi, i am having a file which is comma seperated , i need to append a char in particular column for eg: infile aa,bb,c,dd,ee zz,yy,sss,ddd,ff . . i need to append for eg 4th column with a char like 'LQ' output: aa,bb,c,LQdd,ee zz,yy,sss,LQddd,ff (12 Replies)
Discussion started by: rohit_shinez
12 Replies

9. UNIX for Beginners Questions & Answers

Append each line based upon the character size

I have a huge file which contains multiple lines. It need to check whether character length is not more than 255 each line. If its not then it should remove the character up to column. I have described in the output below. If its more than that the next line should start with call but if the... (1 Reply)
Discussion started by: JoshvaPeter
1 Replies

10. Shell Programming and Scripting

Adding character and append last element of second column

Hi, could you help me in processing this file under bash? I need to add some text to the first line and then append the last element of the second columns. The input file is tab separated while the output should be space separated. input file is 1.00E-02 2.00E-02 4.465E+17 2.00E-02 3.00E-02... (4 Replies)
Discussion started by: f_o_555
4 Replies
puts(3C)						   Standard C Library Functions 						  puts(3C)

NAME
puts, fputs - put a string on a stream SYNOPSIS
#include <stdio.h> int puts(const char *s); int fputs(const char *s, FILE *stream); DESCRIPTION
The puts() function writes the string pointed to by s, followed by a NEWLINE character, to the standard output stream stdout (see intro(3)). The terminating null byte is not written. The fputs() function writes the null-terminated string pointed to by s to the named output stream. The terminating null byte is not writ- ten. The st_ctime and st_mtime fields of the file will be marked for update between the successful execution of fputs() and the next successful completion of a call to fflush(3C) or fclose(3C) on the same stream or a call to exit(2) or abort(3C). RETURN VALUES
On successful completion, both functions return the number of bytes written; otherwise they return EOF and set errno to indicate the error. ERRORS
Refer to fputc(3C). USAGE
Unlike puts(), the fputs() function does not write a NEWLINE character at the end of the string. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
exit(2), write(2), intro(3), abort(3C), fclose(3C), ferror(3C), fflush(3C), fopen(3C), fputc(3C), printf(3C), stdio(3C), attributes(5), standards(5) SunOS 5.10 18 Jun 2003 puts(3C)
All times are GMT -4. The time now is 11:08 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy