Strings (Unix) - Factbites

Strings (Unix) - Factbites
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Topic: Strings (Unix)

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	Ben's Beta Blog
		GNU dc is packaged along with bc; the current versions of each are 1.06 for bc and 1.3 for dc, according to bc-1.06/configure.in.
		According to Ken Thompson, as quoted in The Art of Unix Programming, "dc is the oldest language on Unix; it was written on the PDP-7 and ported to the PDP-11 before Unix [itself] was ported." According to A Quarter Century of Unix, "That was actually the first program that ran on the PDP-11.
		In fact, there was so much dc code that I naively thought "why not just get rid of Perl entirely and implement the whole thing in dc?" I later discovered that dc can't easily convert from character strings to numeric strings, and that the vestigial Perl code wrapping the dc engine does little else.
	cpe000103c34069-cm014300001653.cpe.net.cable.rogers.com /weblogs/ben/programming/dc/Prime-Sieve-in-DC.writeback (2140 words)

	COTSE-Perl-split
		Splits a string into an array of strings, and returns it.
		split() on /\s+/ is like a split(' ') except that any leading whitespace produces a null first field.
		Thus, split(' ') can be used to emulate awk's default behavior, whereas split(/ /) will give you as many null initial fields as there are leading spaces.
	www.cotse.com /perl/split.html (2140 words)

	Cal Poly Central UNIX man pages : tr (1)
		For example: tr -s '[:upper:]' '[:lower:]' The following abbreviation conventions can be used to introduce ranges of characters, repeated characters or single-character collating elements into the strings: c1-c2 or Stands for the range of collating elements c1 [c1-c2] through c2, inclusive, as defined by the current setting of the LC_COLLATE locale category.
		tr "[:lower:]" "[:upper:]" file2 Translate each digit in file1 to a # (number sign), and write the result to file2.
		For example: tr -s '[:space:]' In a case conversion, however, the string2 array contains only those characters defined as the second characters in each of the toupper or tolower character pairs, as appropriate.
	www.calpoly.edu /cgi-bin/man-cgi?tr+1 (2140 words)

	WDVL: Date and Time in PHP
		This article guides you through the functions, explaining the concept of a Unix timestamp, which is at the heart of most of the functions, and shows you how easy it is to master these often-misused functions.
		You can also pass it a timestamp (often called a Unix timestamp, since it developed on Unix machines), which is the number of seconds since January 1, 1970 (starting with 1 second after midnight).
		Be careful though with trying to use one of the reserved format strings as your own format string.
	www.wdvl.com /Authoring/Languages/PHP/Date_Time (2140 words)

	UNIX man pages : FN_search_filter_t ()
		The string contains the filter expression with substitution tokens for the attributes, attribute values, strings, and identifiers that are part of the expression.
		BNF of Filter Expression ::= [ ] ::= "or" "and"
		FN_E_SEARCH_INVALID_OP An operator in the filter expression is not supported or, if the operator is an extended operator, the number of types of arguments supplied does not match the signature of the operation.
	www.cs.umbc.edu /cgi-bin/man-cgi?FN_search_filter_t (1402 words)

	UNIX Shell Script Tutorials & Reference
		UNIX will attempt to execute the file in the current shell, and try to process the included command strings within the file using the syntax rules of the current shell.
		The UNIX man pages contain almost twice as much information for the C Shell as the pages for the Bourne shell, leading most users to believe that it is twice as good.
		By default the UNIX system will attempt to execute an ASCII text file if the files name is supplied as the first argument on the command line.
	www.injunea.demon.co.uk /pages/page203.htm (1402 words)

	ISDweb Documentation Operating Systems Unix Commands and Utilities
		Filtering Text Files can be used to retrieve, replace or remove certain text strings in a UNIX file or group of files.
		Tar is a file archiving command that allows you to bundle a number of files and/or directories together into a single file that can be easily transferred between computers.
		Grep commands allow you to search text files for a particular expression (text string).
	www.usc.edu /isd/doc/os/unix/commands (314 words)

	Oracle tip: How to use UNIX to display row information
		Once we run the dd command to read the Oracle data block, we can filter the output by piping it to the UNIX strings command to only show printable information.
		The UNIX operating system can be used to probe into the Oracle data blocks.
		Here is the UNIX command and the output showing the displayable data inside the data block:
	www.remote-dba.cc /oracle_tips_unix_row.htm (331 words)

	VISI.com UNIX man pages: od (1)
		od [-abcdfhiloxv] [-s[bytes]] [-w[bytes]] [-A radix] [-j bytes] [-N bytes] [-t type] [--skip-bytes=bytes] [--address-radix=radix] [--read-bytes=bytes] [--format=type] [--output-duplicates] [--strings[=bytes]] [--width[=bytes]] [--traditional] [--help] [--version] [file...]
		od writes to the standard output the contents of the given files, or of the standard input if the name `-' is given.
		If you include more than one type indicator character in a single type string or use this option more than once, od writes one copy of each out- put line using each of the data types that you speci- fied, in the order that you specified.
	www.visi.com /cgi-bin/man?od+1 (331 words)

	UNIX man pages : od ()
		The output format can be specified with one or more type strings ( type _ str) and/or with format options.
		od -c 0000000 h e l l o w o r l d \n 0000014 Page 1 od(1) od(1) -D Interpret long words in unsigned decimal.
		od displays a list of file s in one or more formats, as selected by user supplied arguments.
	www.mcsr.olemiss.edu /cgi-bin/man-cgi?od (331 words)

	saf.9203
		One simple way of spotting suspicious binaries in a case like this is to run the unix "strings" command on the file.
		On UNIX systems, it is quite easy for a program to, e.g., mail a copy of /etc/passwd to the person who wrote the program, who can then try to find passwords that encrypt to the values for the root password and a non-privileged user's password.
		This is not true of a UNIX system unless the sysadmin has done some remarkably stupid things to it.
	fits.cv.nrao.edu /traffic/sciastrofits/saf.92/saf.9203 (331 words)

	dc.sed.txt
		For details on operating dc, see the dc manual page on any UNIX system or on the web (one URL you can use is http://www.delorie.com/gnu/docs/bc/dc.1.html).
		As far as I know, dc.sed is actually less buggy than the UNIX and GNU versions, barring the memory and speed limitations.
		Besides supporting calculations on very long numbers, it also handles non-decimal input and output bases (even negative and fractional bases), and has a set of stackable registers in which can be stored numbers, strings, or executable macros.
	www.dbnet.ece.ntua.gr /~adamo/sed/OLD/dc.sed.txt (871 words)

	March 1999
		For example, you might recall that you saw a handy snippet of code that strips the leading and trailing spaces off of a string, and look for it under the "Strings" chapter.
		Having spent much of my professional life coding medical information systems in MUMPS (Massachusetts general hospital Utility Multi Programming System) which had such an inferiority complex that they actually changed the name of the language to M, I'm used to taking it on the chin for my choice of programming environment.
		Since the behavior knows the position of the highlight sprite it is attached to, it can use the coordinates of the highlight sprite to position the popup menu so that it is left-aligned with the highlight sprite and about 20 pixels from its top edge, which makes it appear underneath the highlight sprite.
	www.updatestage.com /previous/990301.html (3212 words)

	Examples and Usages of Unix Commands
		A command in alias form allows the entering of shorter or easy-to-remember names to execute longer or hard-to-remember command strings and eases the transition to Unix for the MS-DOS users.
		The following is a brief description of commonly used Unix commands.
		History of the unix commands used in the window
	www.math.utep.edu /Mathematica/unixlist.html (126 words)

	freshmeat.net announcements (Global)
		Objects can be automatically converted to strings for integration with the conventional Unix environment.
		Object Shell (osh) is the interpreter for a Python-like language that supports the composition of commands through piping, similar to pipes in a Unix shell.
		They are portable and enhanced versions of the respective OpenSolaris utilities, which descend from ditroff and the historical Unix troff.
	images.feedstermedia.com /feedcache/ostg/freshmeat/fm-releases-global.xml (7163 words)

	regex_proposal
		Regular expressions should be familiar to many programmers; a regular expression is a string used as a pattern to select specific strings from a set of character strings.
		Regular expressions are used by many familiar Unix utilities, including egrep, grep, lex, and sed[1], and are supported directly in many programming languages including awk[1], perl[2], C#[3], and ECMAScript[4] (also known as JavaScript), and indeed are often used ubiquitously wherever text processing occurs.
		The extended POSIX regular expression syntax is used by the Unix utilities egrep and awk[1].
	anubis.dkuug.dk /jtc1/sc22/wg21/docs/papers/2003/n1429.htm (11024 words)

	apop.html
		I decided that I'd take this solution to the next level and build a set of APOP management utilities to let a user manage his own APOP password strings, and build added security so that a unix password cracker would be useless in attacking a captured APOP password string to get the real password.
		After I spent all this time digging in the cucipop code and reading RFC1939 I figured out why APOP didn't work well on a UNIX machine, I was bummed and still needed a solution.
		The major problem with APOP is that it is sparcly supported in the UNIX world.
	www.mycal.net /old/network/apop.html (801 words)

	Glossary Search Results
		XOR returns true, or "1", if only one of the two strings contains a 1 at a particular bit position, and a false, or "0", if both strings contain 0s or 1s at both positions.
		X Window System (X Windows) - A consortium-developed, open-standard, device-independent GUI system that is most commonly found on UNIX and Linux operating systems and invoked with the "startx" command.
		X-Windows (X Window System) - A consortium-developed, open-standard, device-independent GUI system that is most commonly found on UNIX and Linux operating systems and invoked with the "startx" command.
	www.geek.com /glossary/glossary_search.cgi?x (809 words)

	Let Windows Grep do the searching - Printer friendly - ZDNet UK Insight
		With Windows Grep, you can search for text strings in binary files, such as word processor documents, databases, spreadsheets, and executables, and you can use it to search for and replace specific text strings in ASCII text files, such as program source, HTML, RTF, and batch files.
		Windows Grep is a text-search utility that works like the UNIX/Linux grep utility but runs on Windows machines.
		You don't need to know anything about the UNIX grep utility to begin searching with Windows Grep.
	www.zdnet.co.uk /print?TYPE=story&AT=2109128-39020469t-20000006c (809 words)

	Perl - Wikipedia, the free encyclopedia
		A hash, or associative array, is a map from strings to scalars; the strings are called keys and the scalars are called values.
		Importantly, sigils allow variables to be interpolated directly into strings.
		Like the Unix shells, Perl has many built-in functions for common tasks, like sorting, and for accessing system facilities.
	en.wikipedia.org /wiki/Perl (4979 words)

	More Info on Bin File - bon voyage midi file, write hex to 3m bin file
		In others, file names are simple strings, and per-file metadata is stored elsewhere.The hierarchical filesystem was an early research interest of Dennis Ritchie of Unix fame; previous implementations were restricted to only a few levels, notably the IBM implementations, even of their early databases like IMS.
		Plan 9 was originally designed to extend some of Unix's good points, and to introduce some new ideas of its own.
		With respect to file systems, the Unix system of treating things as files was continued, but in Plan 9, everything is treated as a file, and accessed as a file would be.
	www.explainplease.com /bin-file.htm (1875 words)

	newline - definition by dict.die.net
		The encoding of line feed as "\n" in C and Unix strings comes from this name.
		Unix uses line feed as its text line terminator - a Bell-Labs-ism rather than a Berkeleyism.
		Interestingly (and unusually for Unix jargon), it is said to have originally been an IBM usage.
	dict.die.net /newline (1875 words)

	comp.compression Frequently Asked Questions (part 1/3)
		A common flaw in the algorithms claimed to compress all files is to assume that arbitrary bit strings can be sent to the decompressor without actually transmitting their bit length.
		(LZW algorithm) ftp://ftp.simtel.net/pub/simtelnet/msdos/arcers/pk361.exe ftp://garbo.uwasa.fi/pc/arcers/ arc for Unix ftp://ftp.ddj.com/packages/arc521e.tar.Z ftp://garbo.uwasa.fi/unix/arcers/ Contact: Howard Chu arc for VMS ftp://wuarchive.wustl.edu/packages/compression/vax-vms/arc.exe for Mac ftp://wuarchive.wustl.edu/systems/mac/info-mac/cmp/ arc for Amiga ftp://ftp.funet.fi/pub/amiga/fish/001-100/ff070/arc.lha.arj: arj for MSDOS (LZ77 with hashing, plus secondary static Huffman encoding on a block basis) Contact: Robert K Jung http://www.arjsoft.com ftp://ftp.simtel.net/pub/simtelnet/msdos/arcers/arj250a.exe ftp://garbo.uwasa.fi/pc/arcers/ unarj for Unix.
		Such algorithms are claimed to compress random data and to be applicable recursively, that is, applying the compressor to the compressed output of the previous run, possibly multiple times.
	www.faqs.org /faqs/compression-faq/part1 (13631 words)

	Free Nlx Downloads
		NLX handles text files of UNIX or MAC format and automatically converts their new-line sequences over to IBM-PC format in a safe and controlled manner.
		NLX can change text files ordinarily used for UNIX or Apple MAC into MS-DOS usable ones.
		FGREPPE is more simple like FGREP on UNIX systems and does a search and replace based on FIXED patterns.
	www.filesweb.com /n/nlx (13631 words)

	newline from FOLDOC
		The encoding of line feed as "\n" in C and Unix strings comes from this name.
		Though the term "newline" appears in ASCII standards, it never caught on in the general computing world before Unix.
		Interestingly (and unusually for Unix jargon), it is said to have originally been an IBM usage.
	ftp.sunet.se /foldoc/foldoc.cgi?query=newline (139 words)

	Planet AbiSource
		One of the "selling point" of AbiWord was that it was multiplatform, and unlike OpenOffice, it was using the native toolkit of each platform, ie Win32 on Windows, Gtk+ on UNIX and Cocoa on MacOS X. But this advantage is in fact being a real constrain, slowing us down in our developments.
		I personally like the AbiWord model: internally strings are identified by numerical id’s; only one set of strings is built into the software (en_US), and localised strings for a given locale are read from an external file, falling back on the internal stringset.
		Since AbiWord was supposed to be cross-platform, it was decided of a limited set of C++ features allowed to be used: no template, no exceptions, no multiple inheritence.
	planet.abisource.com (9261 words)

	BASIC Programming and Chipmunk Basic Home Page
		Yabasic 2.7 - (Basic interpreter written using flex, bison & C, ports for unix/linux & Win98/NT) (Open Source under Artistic License).
		Bas 1.7 - a Basic interpreter for unix (by Michael Haardt, GPL'd source code)
		interp2num - C language source code for routines that parse and interpret equations in the form of text strings into numbers, e.g.
	www.nicholson.com /rhn/basic (2469 words)

	diskd1
		CONTENTS: binutils bison byacc flex m4 binutils: GNU binutils 2.6.0.14 binutils: binutils: C compiler utilities: binutils: binutils: ar as c++filt gasp gprof encaps ld nm objcopy objdump ranlib size binutils: strings strings-gnu strip ld86 as86 binutils: binutils: These utilities are REQUIRED to compile C, C++, Objective-C, and binutils: many other programming languages.
		m4 has built-in functions for m4: including named files, running Unix commands, doing integer m4: arithmetic, manipulating text in various ways, recursion, etc...
		flex: flex: flex: flex: flex: flex: flex: m4: GNU m4 1.4 m4: m4: This is release 1.4 of GNU m4, a program which copies its input to the m4: output, expanding macros as it goes.
	www.ibiblio.org /pub/historic-linux/distributions/slackware/3.1/slakware/d1/diskd1 (288 words)

	New Version of the Generic Mapping Tools Released
		GMT is written in the C language and has been installed on super-computers, workstations, and MacIntosh and IBM-type personal computers, all running some flavor of UNIX; it will likely run on other UNIX platforms with little or no modification.
		Together these data sets contain about 20 million data points in disjoint strings.
		Most users of GMT are geoscientists, but quite a few are not: we have heard from users in medical research, engineering, physics, mathematics, social and biological sciences, and from geographers, fisheries institutes, oil companies, and a wide range of government agencies.
	www.agu.org /eos_elec/95154e.html (288 words)

	Amazon.com: C for Dummies, Volume 1: Books
		The first volume covers the fundamentals of the language, such as basic language constructs, variable types, functions, program logic, looping, and simple console I/O. The second half presents more ANSI C functions, arrays, and strings.
		Forget about programming in Windows environment, Mac, UNIX and Linux.
		For those learning C on a UNIX or Macintosh platform, there are several examples used in the book that will result in errors if you don't know which header files to use (in place of the ones the book suggest).
	www.amazon.com /exec/obidos/tg/detail/-/1878058789?v=glance (2484 words)

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Topic: Strings (Unix)

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In the News (Sat 26 Dec 09)