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Truncate a file: Difference between revisions
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→{{header|UNIX Shell}}
Line 715:
# 4. trunc(): trunc file size # truncate at length
-bash-4.2$ trunc() { IFS= read -N $2 b<"$1"; echo -n "$b">"$1"; }
-bash-4.2$ echo "abcdef">bad; ls -l bad; cat bad; trunc bad 3; ls -l bad; cat bad; echo "_EOF_"
+ echo abcdef
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_EOF_
</lang>
# NOTE: Designed for regular text files. Does not work when files contain: chars 0x00 and 0xFF as of bash 4.2 - these chars are treated differently in read -N. For this reason use of method#4 is not prefer over dd(1) or truncate(1) when using binary files, or large files.
=={{header|ZX Spectrum Basic}}==
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