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Top Forums Shell Programming and Scripting Using sed to insert text file at first line Post 302508631 by alister on Monday 28th of March 2011 03:06:19 PM
Old 03-28-2011
I completely missed page 2 of this thread when I wrote the following Smilie

Quote:
Originally Posted by psve
Code:
sed '1r file.txt' <source.txt >desti.txt

This example will insert 'file.txt' between line 1 and 2 of source.txt.
Code:
sed '0r file.txt' <source.txt >desti.txt

gives an error message.

Does anyone know how 'sed' can insert 'file.txt' before the first line of source.txt?

I like ctsgnb's cat suggestion. However, if your life depends on using sed, you could swap the order of files:
Code:
sed '$r source.txt' < file.txt > desti.txt

If this is part of a larger sed task and swapping the order is not palatable, and if you are certain that there's more than one line in source.txt, you could use the following in a sed script:
Code:
1 {
    r file.txt
    h
    d
}

2 {
    H
    g
}

Regards,
Alister
 

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FPRINTF(3)								 1								FPRINTF(3)

fprintf - Write a formatted string to a stream

SYNOPSIS
int fprintf (resource $handle, string $format, [mixed $args], [mixed $...]) DESCRIPTION
Write a string produced according to $format to the stream resource specified by $handle. PARAMETERS
o $handle -A file system pointer resource that is typically created using fopen(3). o $format - See sprintf(3) for a description of $format. o $args - o $... - RETURN VALUES
Returns the length of the string written. EXAMPLES
Example #1 fprintf(3): zero-padded integers <?php if (!($fp = fopen('date.txt', 'w'))) { return; } fprintf($fp, "%04d-%02d-%02d", $year, $month, $day); // will write the formatted ISO date to date.txt ?> Example #2 fprintf(3): formatting currency <?php if (!($fp = fopen('currency.txt', 'w'))) { return; } $money1 = 68.75; $money2 = 54.35; $money = $money1 + $money2; // echo $money will output "123.1"; $len = fprintf($fp, '%01.2f', $money); // will write "123.10" to currency.txt echo "wrote $len bytes to currency.txt"; // use the return value of fprintf to determine how many bytes we wrote ?> SEE ALSO
printf(3), sprintf(3), sscanf(3), fscanf(3), vsprintf(3), number_format(3). PHP Documentation Group FPRINTF(3)
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