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Top Forums Shell Programming and Scripting echo command and file I/O Redirection Post 302193624 by userix on Saturday 10th of May 2008 05:51:16 AM
Old 05-10-2008
Quote:
Originally Posted by matrixmadhan
Why do you feel creating a temp file is a constraint ?
even sort uses temp files
check out the option -T
Code:
-T, --temporary-directory=DIR
              use DIR for temporaries, not $TMPDIR or /tmp;  multiple  options
              specify multiple directories

I am curious if it is possible to do it without temp file, because I can set the data into a variable, but the only problem is the newlines not being stored as well. Is this a limitation with the 'set' command, or the 'echo' command. This a CS class project I have to complete. So in the end, I have to give read and execute permissions to my professor. If I give him r+x permissions and he runs the script from my personal folder, would it not be able to create a temp file, since he does not have write permissions in my folder?
 

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SORT(1) 							   User Commands							   SORT(1)

NAME
sort - sort lines of text files SYNOPSIS
sort [OPTION]... [FILE]... sort [OPTION]... --files0-from=F DESCRIPTION
Write sorted concatenation of all FILE(s) to standard output. Mandatory arguments to long options are mandatory for short options too. Ordering options: -b, --ignore-leading-blanks ignore leading blanks -d, --dictionary-order consider only blanks and alphanumeric characters -f, --ignore-case fold lower case to upper case characters -g, --general-numeric-sort compare according to general numerical value -i, --ignore-nonprinting consider only printable characters -M, --month-sort compare (unknown) < `JAN' < ... < `DEC' -h, --human-numeric-sort compare human readable numbers (e.g., 2K 1G) -n, --numeric-sort compare according to string numerical value -R, --random-sort sort by random hash of keys --random-source=FILE get random bytes from FILE -r, --reverse reverse the result of comparisons --sort=WORD sort according to WORD: general-numeric -g, human-numeric -h, month -M, numeric -n, random -R, version -V -V, --version-sort natural sort of (version) numbers within text Other options: --batch-size=NMERGE merge at most NMERGE inputs at once; for more use temp files -c, --check, --check=diagnose-first check for sorted input; do not sort -C, --check=quiet, --check=silent like -c, but do not report first bad line --compress-program=PROG compress temporaries with PROG; decompress them with PROG -d --debug annotate the part of the line used to sort, and warn about questionable usage to stderr --files0-from=F read input from the files specified by NUL-terminated names in file F; If F is - then read names from standard input -k, --key=POS1[,POS2] start a key at POS1 (origin 1), end it at POS2 (default end of line). See POS syntax below -m, --merge merge already sorted files; do not sort -o, --output=FILE write result to FILE instead of standard output -s, --stable stabilize sort by disabling last-resort comparison -S, --buffer-size=SIZE use SIZE for main memory buffer -t, --field-separator=SEP use SEP instead of non-blank to blank transition -T, --temporary-directory=DIR use DIR for temporaries, not $TMPDIR or /tmp; multiple options specify multiple directories --parallel=N change the number of sorts run concurrently to N -u, --unique with -c, check for strict ordering; without -c, output only the first of an equal run -z, --zero-terminated end lines with 0 byte, not newline --help display this help and exit --version output version information and exit POS is F[.C][OPTS], where F is the field number and C the character position in the field; both are origin 1. If neither -t nor -b is in effect, characters in a field are counted from the beginning of the preceding whitespace. OPTS is one or more single-letter ordering options, which override global ordering options for that key. If no key is given, use the entire line as the key. SIZE may be followed by the following multiplicative suffixes: % 1% of memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y. With no FILE, or when FILE is -, read standard input. *** WARNING *** The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values. AUTHOR
Written by Mike Haertel and Paul Eggert. REPORTING BUGS
Report sort bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report sort translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for sort is maintained as a Texinfo manual. If the info and sort programs are properly installed at your site, the command info coreutils 'sort invocation' should give you access to the complete manual. GNU coreutils 8.12.197-032bb September 2011 SORT(1)
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