Appending newline character End of File Post: 302881607

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Top Forums Shell Programming and Scripting Appending newline character End of File Post 302881607 by wisecracker on Monday 30th of December 2013 01:21:00 PM

12-30-2013

Registered User

Simplest method use _echo ""_...

Code:

#!/bin/bash --posix
echo "Your example string..."
echo -n "1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#" > /tmp/text
hexdump -C < /tmp/text
cat < /tmp/text
echo "Now add a newline at the end..."
echo "" >> /tmp/text
### OR ###
# echo '\n' >> /tmp/text
hexdump -C < /tmp/text
cat < /tmp/text

Results:-

Code:

Last login: Mon Dec 30 18:15:02 on ttys000
AMIGA:barrywalker~> chmod 755 add_nl.sh
AMIGA:barrywalker~> ./add_nl.sh
Your example string...
00000000  31 7c 4d 61 69 6e 7c 54  65 73 74 7c 7e 23 0a 32  |1|Main|Test|~#.2|
00000010  7c 4d 61 69 6e 7c 48 65  6c 6c 6f 7c 7e 23 0a 33  ||Main|Hello|~#.3|
00000020  7c 4d 61 69 6e 7c 55 6e  69 78 7c 7e 23 0a 34 7c  ||Main|Unix|~#.4||
00000030  4d 61 69 6e 7c 46 69 6c  65 7c 7e 23              |Main|File|~#|
0000003c
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#Now add a newline at the end...
00000000  31 7c 4d 61 69 6e 7c 54  65 73 74 7c 7e 23 0a 32  |1|Main|Test|~#.2|
00000010  7c 4d 61 69 6e 7c 48 65  6c 6c 6f 7c 7e 23 0a 33  ||Main|Hello|~#.3|
00000020  7c 4d 61 69 6e 7c 55 6e  69 78 7c 7e 23 0a 34 7c  ||Main|Unix|~#.4||
00000030  4d 61 69 6e 7c 46 69 6c  65 7c 7e 23 0a           |Main|File|~#.|
0000003d
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#
AMIGA:barrywalker~> _

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LEARN ABOUT MINIX

gets

GETS(3) 						     Library Functions Manual							   GETS(3)

NAME

       gets, fgets - get a string from a stream

SYNOPSIS

       #include <stdio.h>

       char *gets(char *s)
       char *fgets(char *s, int n, FILE *stream)

DESCRIPTION

       Gets  reads  a string into s from the standard input stream stdin.  The string is terminated by a newline character, which is replaced in s
       by a null character.  Gets returns its argument.

       Fgets reads n-1 characters, or up through a newline character, whichever comes first, from the stream into the string s.  The last  charac-
       ter read into s is followed by a null character.  Fgets returns its first argument.

SEE ALSO

       puts(3), getc(3), scanf(3), fread(3), ferror(3).

DIAGNOSTICS

       Gets and fgets return the constant pointer NULL upon end of file or error.

BUGS

       Gets deletes a newline, fgets keeps it, all in the name of backward compatibility.

       Gets is not present in the Minix-vmd C library for reasons that should be obvious.  Use fgets instead.

7th Edition							   May 15, 1985 							   GETS(3)