31 lines
707 B
Groff
31 lines
707 B
Groff
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.TH TRUNCATE 2 "Feb 13, 2006"
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.UC 4
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.SH NAME
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truncate, ftruncate \- truncate a file to a specified length (may extend)
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.SH SYNOPSIS
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.ft B
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.nf
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#include <unistd.h>
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int truncate(char *filename, off_t length);
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int ftruncate(int fd, off_t length);
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.fi
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.ft R
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.SH DESCRIPTION
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.B Truncate
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causes the file
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.B filename
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to be set to the length
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.B length
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causing data after that size to be lost. If the file is set to a
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length larger than the current file size, the new region can be
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written to but reads as zeroes. There will be no disk blocks reserved
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for it. This is a hole.
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.PP
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.B Ftruncate
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does the same thing as
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.B truncate
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but operates on a file descriptor instead of a filename.
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.SH "SEE ALSO
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.BR fcntl (2)
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