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+rm(P) rm(P)
+
+
+
+
+
+NAME
+ rm - remove directory entries
+
+SYNOPSIS
+ rm [-fiRr] file...
+
+DESCRIPTION
+ The rm utility shall remove the directory entry speci-
+ fied by each file argument.
+
+ If either of the files dot or dot-dot are specified as
+ the basename portion of an operand (that is, the final
+ pathname component), rm shall write a diagnostic message
+ to standard error and do nothing more with such oper-
+ ands.
+
+ For each file the following steps shall be taken:
+
+ If the file does not exist: <ol type="a">
+
+ If the -f option is not specified, rm shall write a
+ diagnostic message to standard error.
+
+ Go on to any remaining files.
+
+ If file is of type directory, the following steps shall
+ be taken: <ol type="a">
+
+ If neither the -R option nor the -r option is specified,
+ rm shall write a diagnostic message to standard error,
+ do nothing more with file, and go on to any remaining
+ files.
+
+ If the -f option is not specified, and either the per-
+ missions of file do not permit writing and the standard
+ input is a terminal or the -i option is specified, rm
+ shall write a prompt to standard error and read a line
+ from the standard input. If the response is not affirma-
+ tive, rm shall do nothing more with the current file and
+ go on to any remaining files.
+
+ For each entry contained in file, other than dot or dot-
+ dot, the four steps listed here (1 to 4) shall be taken
+ with the entry as if it were a file operand. The rm
+ utility shall not traverse directories by following sym-
+ bolic links into other parts of the hierarchy, but shall
+ remove the links themselves.
+
+ If the -i option is specified, rm shall write a prompt
+ to standard error and read a line from the standard
+ input. If the response is not affirmative, rm shall do
+ nothing more with the current file, and go on to any
+ remaining files.
+
+ If file is not of type directory, the -f option is not
+ specified, and either the permissions of file do not
+ permit writing and the standard input is a terminal or
+ the -i option is specified, rm shall write a prompt to
+ the standard error and read a line from the standard
+ input. If the response is not affirmative, rm shall do
+ nothing more with the current file and go on to any
+ remaining files.
+
+ If the current file is a directory, rm shall perform
+ actions equivalent to the rmdir() function defined in
+ the System Interfaces volume of IEEE Std 1003.1-2001
+ called with a pathname of the current file used as the
+ path argument. If the current file is not a directory,
+ rm shall perform actions equivalent to the unlink()
+ function defined in the System Interfaces volume of
+ IEEE Std 1003.1-2001 called with a pathname of the cur-
+ rent file used as the path argument.
+
+ If this fails for any reason, rm shall write a diagnos-
+ tic message to standard error, do nothing more with the
+ current file, and go on to any remaining files.
+
+ The rm utility shall be able to descend to arbitrary
+ depths in a file hierarchy, and shall not fail due to
+ path length limitations (unless an operand specified by
+ the user exceeds system limitations).
+
+OPTIONS
+ The rm utility shall conform to the Base Definitions
+ volume of IEEE Std 1003.1-2001, Section 12.2, Utility
+ Syntax Guidelines.
+
+ The following options shall be supported:
+
+ -f Do not prompt for confirmation. Do not write
+ diagnostic messages or modify the exit status in
+ the case of nonexistent operands. Any previous
+ occurrences of the -i option shall be ignored.
+
+ -i Prompt for confirmation as described previously.
+ Any previous occurrences of the -f option shall
+ be ignored.
+
+ -R Remove file hierarchies. See the DESCRIPTION.
+
+ -r Equivalent to -R.
+
+
+OPERANDS
+ The following operand shall be supported:
+
+ file A pathname of a directory entry to be removed.
+
+
+STDIN
+ The standard input shall be used to read an input line
+ in response to each prompt specified in the STDOUT sec-
+ tion. Otherwise, the standard input shall not be used.
+
+INPUT FILES
+ None.
+
+ENVIRONMENT VARIABLES
+ The following environment variables shall affect the
+ execution of rm:
+
+ LANG Provide a default value for the internationaliza-
+ tion variables that are unset or null. (See the
+ Base Definitions volume of IEEE Std 1003.1-2001,
+ Section 8.2, Internationalization Variables for
+ the precedence of internationalization variables
+ used to determine the values of locale cate-
+ gories.)
+
+ LC_ALL If set to a non-empty string value, override the
+ values of all the other internationalization
+ variables.
+
+ LC_COLLATE
+
+ Determine the locale for the behavior of ranges,
+ equivalence classes, and multi-character collat-
+ ing elements used in the extended regular expres-
+ sion defined for the yesexpr locale keyword in
+ the LC_MESSAGES category.
+
+ LC_CTYPE
+ Determine the locale for the interpretation of
+ sequences of bytes of text data as characters
+ (for example, single-byte as opposed to multi-
+ byte characters in arguments) and the behavior of
+ character classes within regular expressions used
+ in the extended regular expression defined for
+ the yesexpr locale keyword in the LC_MESSAGES
+ category.
+
+ LC_MESSAGES
+ Determine the locale for the processing of affir-
+ mative responses that should be used to affect
+ the format and contents of diagnostic messages
+ written to standard error.
+
+ NLSPATH
+ Determine the location of message catalogs for
+ the processing of LC_MESSAGES .
+
+
+ASYNCHRONOUS EVENTS
+ Default.
+
+STDOUT
+ Not used.
+
+STDERR
+ Prompts shall be written to standard error under the
+ conditions specified in the DESCRIPTION and OPTIONS sec-
+ tions. The prompts shall contain the file pathname, but
+ their format is otherwise unspecified. The standard
+ error also shall be used for diagnostic messages.
+
+OUTPUT FILES
+ None.
+
+EXTENDED DESCRIPTION
+ None.
+
+EXIT STATUS
+ The following exit values shall be returned:
+
+ 0 All of the named directory entries for which rm
+ performed actions equivalent to the rmdir() or
+ unlink() functions were removed.
+
+ >0 An error occurred.
+
+
+CONSEQUENCES OF ERRORS
+ Default.
+
+ The following sections are informative.
+
+APPLICATION USAGE
+ The rm utility is forbidden to remove the names dot and
+ dot-dot in order to avoid the consequences of inadver-
+ tently doing something like:
+
+
+ rm -r .*
+
+ Some implementations do not permit the removal of the
+ last link to an executable binary file that is being
+ executed; see the [EBUSY] error in the unlink() function
+ defined in the System Interfaces volume of
+ IEEE Std 1003.1-2001. Thus, the rm utility can fail to
+ remove such files.
+
+ The -i option causes rm to prompt and read the standard
+ input even if the standard input is not a terminal, but
+ in the absence of -i the mode prompting is not done when
+ the standard input is not a terminal.
+
+EXAMPLES
+ The following command:
+
+
+ rm a.out core
+
+ removes the directory entries: a.out and core.
+
+ The following command:
+
+
+ rm -Rf junk
+
+ removes the directory junk and all its contents, without
+ prompting.
+
+RATIONALE
+ For absolute clarity, paragraphs (2b) and (3) in the
+ DESCRIPTION of rm describing the behavior when prompting
+ for confirmation, should be interpreted in the following
+ manner:
+
+
+ if ((NOT f_option) AND
+ ((not_writable AND input_is_terminal) OR i_option))
+
+ The exact format of the interactive prompts is unspeci-
+ fied. Only the general nature of the contents of prompts
+ are specified because implementations may desire more
+ descriptive prompts than those used on historical imple-
+ mentations. Therefore, an application not using the -f
+ option, or using the -i option, relies on the system to
+ provide the most suitable dialog directly with the user,
+ based on the behavior specified.
+
+ The -r option is historical practice on all known sys-
+ tems. The synonym -R option is provided for consistency
+ with the other utilities in this volume of
+ IEEE Std 1003.1-2001 that provide options requesting
+ recursive descent through the file hierarchy.
+
+ The behavior of the -f option in historical versions of
+ rm is inconsistent. In general, along with "forcing" the
+ unlink without prompting for permission, it always
+ causes diagnostic messages to be suppressed and the exit
+ status to be unmodified for nonexistent operands and
+ files that cannot be unlinked. In some versions, how-
+ ever, the -f option suppresses usage messages and system
+ errors as well. Suppressing such messages is not a ser-
+ vice to either shell scripts or users.
+
+ It is less clear that error messages regarding files
+ that cannot be unlinked (removed) should be suppressed.
+ Although this is historical practice, this volume of
+ IEEE Std 1003.1-2001 does not permit the -f option to
+ suppress such messages.
+
+ When given the -r and -i options, historical versions of
+ rm prompt the user twice for each directory, once before
+ removing its contents and once before actually attempt-
+ ing to delete the directory entry that names it. This
+ allows the user to "prune" the file hierarchy walk. His-
+ torical versions of rm were inconsistent in that some
+ did not do the former prompt for directories named on
+ the command line and others had obscure prompting behav-
+ ior when the -i option was specified and the permissions
+ of the file did not permit writing. The POSIX Shell and
+ Utilities rm differs little from historic practice, but
+ does require that prompts be consistent. Historical ver-
+ sions of rm were also inconsistent in that prompts were
+ done to both standard output and standard error. This
+ volume of IEEE Std 1003.1-2001 requires that prompts be
+ done to standard error, for consistency with cp and mv,
+ and to allow historical extensions to rm that provide an
+ option to list deleted files on standard output.
+
+ The rm utility is required to descend to arbitrary
+ depths so that any file hierarchy may be deleted. This
+ means, for example, that the rm utility cannot run out
+ of file descriptors during its descent (that is, if the
+ number of file descriptors is limited, rm cannot be
+ implemented in the historical fashion where one file
+ descriptor is used per directory level). Also, rm is not
+ permitted to fail because of path length restrictions,
+ unless an operand specified by the user is longer than
+ {PATH_MAX}.
+
+ The rm utility removes symbolic links themselves, not
+ the files they refer to, as a consequence of the depen-
+ dence on the unlink() functionality, per the DESCRIP-
+ TION. When removing hierarchies with -r or -R, the pro-
+ hibition on following symbolic links has to be made
+ explicit.
+
+FUTURE DIRECTIONS
+ None.
+
+SEE ALSO
+ rmdir() , the System Interfaces volume of
+ IEEE Std 1003.1-2001, remove(), rmdir(), unlink()
+
+COPYRIGHT
+ Portions of this text are reprinted and reproduced in
+ electronic form from IEEE Std 1003.1, 2003 Edition,
+ Standard for Information Technology -- Portable Operat-
+ ing System Interface (POSIX), The Open Group Base Speci-
+ fications Issue 6, Copyright (C) 2001-2003 by the Insti-
+ tute of Electrical and Electronics Engineers, Inc and
+ The Open Group. In the event of any discrepancy between
+ this version and the original IEEE and The Open Group
+ Standard, the original IEEE and The Open Group Standard
+ is the referee document. The original Standard can be
+ obtained online at http://www.open-
+ group.org/unix/online.html .
+
+
+
+POSIX 2003 rm(P)