diff options
Diffstat (limited to 'manual/pattern.texi')
| -rw-r--r-- | manual/pattern.texi | 219 |
1 files changed, 73 insertions, 146 deletions
diff --git a/manual/pattern.texi b/manual/pattern.texi index 069a6a2..39ae97a 100644 --- a/manual/pattern.texi +++ b/manual/pattern.texi @@ -25,9 +25,8 @@ particular string. The result is a yes or no answer: does the string fit the pattern or not. The symbols described here are all declared in @file{fnmatch.h}. -@comment fnmatch.h -@comment POSIX.2 @deftypefun int fnmatch (const char *@var{pattern}, const char *@var{string}, int @var{flags}) +@standards{POSIX.2, fnmatch.h} @safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} @c fnmatch @mtsenv @mtslocale @ascuheap @acsmem @c strnlen dup ok @@ -75,24 +74,21 @@ returning nonzero values that are not equal to @code{FNM_NOMATCH}. These are the available flags for the @var{flags} argument: @vtable @code -@comment fnmatch.h -@comment GNU @item FNM_FILE_NAME +@standards{GNU, fnmatch.h} Treat the @samp{/} character specially, for matching file names. If this flag is set, wildcard constructs in @var{pattern} cannot match @samp{/} in @var{string}. Thus, the only way to match @samp{/} is with an explicit @samp{/} in @var{pattern}. -@comment fnmatch.h -@comment POSIX.2 @item FNM_PATHNAME +@standards{POSIX.2, fnmatch.h} This is an alias for @code{FNM_FILE_NAME}; it comes from POSIX.2. We don't recommend this name because we don't use the term ``pathname'' for file names. -@comment fnmatch.h -@comment POSIX.2 @item FNM_PERIOD +@standards{POSIX.2, fnmatch.h} Treat the @samp{.} character specially if it appears at the beginning of @var{string}. If this flag is set, wildcard constructs in @var{pattern} cannot match @samp{.} as the first character of @var{string}. @@ -103,9 +99,8 @@ special treatment applies to @samp{.} following @samp{/} as well as to @code{FNM_PERIOD} and @code{FNM_FILE_NAME} flags together for matching file names.) -@comment fnmatch.h -@comment POSIX.2 @item FNM_NOESCAPE +@standards{POSIX.2, fnmatch.h} Don't treat the @samp{\} character specially in patterns. Normally, @samp{\} quotes the following character, turning off its special meaning (if any) so that it matches only itself. When quoting is enabled, the @@ -114,9 +109,8 @@ mark in the pattern acts like an ordinary character. If you use @code{FNM_NOESCAPE}, then @samp{\} is an ordinary character. -@comment fnmatch.h -@comment GNU @item FNM_LEADING_DIR +@standards{GNU, fnmatch.h} Ignore a trailing sequence of characters starting with a @samp{/} in @var{string}; that is to say, test whether @var{string} starts with a directory name that @var{pattern} matches. @@ -124,14 +118,12 @@ directory name that @var{pattern} matches. If this flag is set, either @samp{foo*} or @samp{foobar} as a pattern would match the string @samp{foobar/frobozz}. -@comment fnmatch.h -@comment GNU @item FNM_CASEFOLD +@standards{GNU, fnmatch.h} Ignore case in comparing @var{string} to @var{pattern}. -@comment fnmatch.h -@comment GNU @item FNM_EXTMATCH +@standards{GNU, fnmatch.h} @cindex Korn Shell @pindex ksh Besides the normal patterns, also recognize the extended patterns @@ -193,9 +185,8 @@ this vector, @code{glob} uses a special data type, @code{glob_t}, which is a structure. You pass @code{glob} the address of the structure, and it fills in the structure's fields to tell you about the results. -@comment glob.h -@comment POSIX.2 @deftp {Data Type} glob_t +@standards{POSIX.2, glob.h} This data type holds a pointer to a word vector. More precisely, it records both the address of the word vector and its size. The GNU implementation contains some more fields which are non-standard @@ -314,9 +305,8 @@ definition for a very similar type. @code{glob64_t} differs from @code{glob_t} only in the types of the members @code{gl_readdir}, @code{gl_stat}, and @code{gl_lstat}. -@comment glob.h -@comment GNU @deftp {Data Type} glob64_t +@standards{GNU, glob.h} This data type holds a pointer to a word vector. More precisely, it records both the address of the word vector and its size. The GNU implementation contains some more fields which are non-standard @@ -393,9 +383,8 @@ This is a GNU extension. @end table @end deftp -@comment glob.h -@comment POSIX.2 @deftypefun int glob (const char *@var{pattern}, int @var{flags}, int (*@var{errfunc}) (const char *@var{filename}, int @var{error-code}), glob_t *@var{vector-ptr}) +@standards{POSIX.2, glob.h} @safety{@prelim{}@mtunsafe{@mtasurace{:utent} @mtsenv{} @mtascusig{:ALRM} @mtascutimer{} @mtslocale{}}@asunsafe{@ascudlopen{} @ascuplugin{} @asucorrupt{} @ascuheap{} @asulock{}}@acunsafe{@acucorrupt{} @aculock{} @acsfd{} @acsmem{}}} @c glob @mtasurace:utent @mtsenv @mtascusig:ALRM @mtascutimer @mtslocale @ascudlopen @ascuplugin @asucorrupt @ascuheap @asulock @acucorrupt @aculock @acsfd @acsmem @c strlen dup ok @@ -480,9 +469,8 @@ If @code{glob} succeeds, it returns 0. Otherwise, it returns one of these error codes: @vtable @code -@comment glob.h -@comment POSIX.2 @item GLOB_ABORTED +@standards{POSIX.2, glob.h} There was an error opening a directory, and you used the flag @code{GLOB_ERR} or your specified @var{errfunc} returned a nonzero value. @@ -494,17 +482,15 @@ See below @end ifinfo for an explanation of the @code{GLOB_ERR} flag and @var{errfunc}. -@comment glob.h -@comment POSIX.2 @item GLOB_NOMATCH +@standards{POSIX.2, glob.h} The pattern didn't match any existing files. If you use the @code{GLOB_NOCHECK} flag, then you never get this error code, because that flag tells @code{glob} to @emph{pretend} that the pattern matched at least one file. -@comment glob.h -@comment POSIX.2 @item GLOB_NOSPACE +@standards{POSIX.2, glob.h} It was impossible to allocate memory to hold the result. @end vtable @@ -521,9 +507,8 @@ bit. If these callback functions are used and a large file or directory is encountered @code{glob} @emph{can} fail. @end deftypefun -@comment glob.h -@comment GNU @deftypefun int glob64 (const char *@var{pattern}, int @var{flags}, int (*@var{errfunc}) (const char *@var{filename}, int @var{error-code}), glob64_t *@var{vector-ptr}) +@standards{GNU, glob.h} @safety{@prelim{}@mtunsafe{@mtasurace{:utent} @mtsenv{} @mtascusig{:ALRM} @mtascutimer{} @mtslocale{}}@asunsafe{@ascudlopen{} @asucorrupt{} @ascuheap{} @asulock{}}@acunsafe{@acucorrupt{} @aculock{} @acsfd{} @acsmem{}}} @c Same code as glob, but with glob64_t #defined as glob_t. The @code{glob64} function was added as part of the Large File Summit @@ -552,9 +537,8 @@ and combine them with the C bitwise OR operator @code{|}. Note that there are @ref{More Flags for Globbing} available as GNU extensions. @vtable @code -@comment glob.h -@comment POSIX.2 @item GLOB_APPEND +@standards{POSIX.2, glob.h} Append the words from this expansion to the vector of words produced by previous calls to @code{glob}. This way you can effectively expand several words as if they were concatenated with spaces between them. @@ -570,16 +554,14 @@ have relocated the vector. So always fetch @code{gl_pathv} from the @code{glob_t} structure after each @code{glob} call; @strong{never} save the pointer across calls. -@comment glob.h -@comment POSIX.2 @item GLOB_DOOFFS +@standards{POSIX.2, glob.h} Leave blank slots at the beginning of the vector of words. The @code{gl_offs} field says how many slots to leave. The blank slots contain null pointers. -@comment glob.h -@comment POSIX.2 @item GLOB_ERR +@standards{POSIX.2, glob.h} Give up right away and report an error if there is any difficulty reading the directories that must be read in order to expand @var{pattern} fully. Such difficulties might include a directory in which you don't @@ -604,23 +586,20 @@ The argument @var{filename} is the name of the directory that If the error handler function returns nonzero, then @code{glob} gives up right away. Otherwise, it continues. -@comment glob.h -@comment POSIX.2 @item GLOB_MARK +@standards{POSIX.2, glob.h} If the pattern matches the name of a directory, append @samp{/} to the directory's name when returning it. -@comment glob.h -@comment POSIX.2 @item GLOB_NOCHECK +@standards{POSIX.2, glob.h} If the pattern doesn't match any file names, return the pattern itself as if it were a file name that had been matched. (Normally, when the pattern doesn't match anything, @code{glob} returns that there were no matches.) -@comment glob.h -@comment POSIX.2 @item GLOB_NOESCAPE +@standards{POSIX.2, glob.h} Don't treat the @samp{\} character specially in patterns. Normally, @samp{\} quotes the following character, turning off its special meaning (if any) so that it matches only itself. When quoting is enabled, the @@ -633,9 +612,8 @@ If you use @code{GLOB_NOESCAPE}, then @samp{\} is an ordinary character. repeatedly. It handles the flag @code{GLOB_NOESCAPE} by turning on the @code{FNM_NOESCAPE} flag in calls to @code{fnmatch}. -@comment glob.h -@comment POSIX.2 @item GLOB_NOSORT +@standards{POSIX.2, glob.h} Don't sort the file names; return them in no particular order. (In practice, the order will depend on the order of the entries in the directory.) The only reason @emph{not} to sort is to save time. @@ -650,23 +628,20 @@ Beside the flags described in the last section, the GNU implementation of which is available in modern shell implementations. @vtable @code -@comment glob.h -@comment GNU @item GLOB_PERIOD +@standards{GNU, glob.h} The @code{.} character (period) is treated special. It cannot be matched by wildcards. @xref{Wildcard Matching}, @code{FNM_PERIOD}. -@comment glob.h -@comment GNU @item GLOB_MAGCHAR +@standards{GNU, glob.h} The @code{GLOB_MAGCHAR} value is not to be given to @code{glob} in the @var{flags} parameter. Instead, @code{glob} sets this bit in the @var{gl_flags} element of the @var{glob_t} structure provided as the result if the pattern used for matching contains any wildcard character. -@comment glob.h -@comment GNU @item GLOB_ALTDIRFUNC +@standards{GNU, glob.h} Instead of using the normal functions for accessing the filesystem the @code{glob} implementation uses the user-supplied functions specified in the structure pointed to by @var{pglob} @@ -674,9 +649,8 @@ parameter. For more information about the functions refer to the sections about directory handling see @ref{Accessing Directories}, and @ref{Reading Attributes}. -@comment glob.h -@comment GNU @item GLOB_BRACE +@standards{GNU, glob.h} If this flag is given, the handling of braces in the pattern is changed. It is now required that braces appear correctly grouped. I.e., for each opening brace there must be a closing one. Braces can be used @@ -710,15 +684,13 @@ glob ("baz", GLOB_BRACE|GLOB_APPEND, NULL, &result) @noindent if we leave aside error handling. -@comment glob.h -@comment GNU @item GLOB_NOMAGIC +@standards{GNU, glob.h} If the pattern contains no wildcard constructs (it is a literal file name), return it as the sole ``matching'' word, even if no file exists by that name. -@comment glob.h -@comment GNU @item GLOB_TILDE +@standards{GNU, glob.h} If this flag is used the character @code{~} (tilde) is handled specially if it appears at the beginning of the pattern. Instead of being taken verbatim it is used to represent the home directory of a known user. @@ -753,9 +725,8 @@ looking for a directory named @code{~homer}. This functionality is equivalent to what is available in C-shells if the @code{nonomatch} flag is set. -@comment glob.h -@comment GNU @item GLOB_TILDE_CHECK +@standards{GNU, glob.h} If this flag is used @code{glob} behaves as if @code{GLOB_TILDE} is given. The only difference is that if the user name is not available or the home directory cannot be determined for other reasons this leads to @@ -765,9 +736,8 @@ the pattern itself as the name. This functionality is equivalent to what is available in C-shells if the @code{nonomatch} flag is not set. -@comment glob.h -@comment GNU @item GLOB_ONLYDIR +@standards{GNU, glob.h} If this flag is used the globbing function takes this as a @strong{hint} that the caller is only interested in directories matching the pattern. If the information about the type of the file @@ -787,9 +757,8 @@ type @code{glob_t} is used in multiple call to @code{glob} the resources are freed or reused so that no leaks appear. But this does not include the time when all @code{glob} calls are done. -@comment glob.h -@comment POSIX.2 @deftypefun void globfree (glob_t *@var{pglob}) +@standards{POSIX.2, glob.h} @safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{} @ascuheap{}}@acunsafe{@acucorrupt{} @acsmem{}}} @c globfree dup @asucorrupt @ascuheap @acucorrupt @acsmem @c free dup @ascuheap @acsmem @@ -799,9 +768,8 @@ calls to @code{glob} associated with the object pointed to by @code{glob_t} typed object isn't used anymore. @end deftypefun -@comment glob.h -@comment GNU @deftypefun void globfree64 (glob64_t *@var{pglob}) +@standards{GNU, glob.h} @safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{} @asulock{}}@acunsafe{@acucorrupt{} @aculock{} @acsfd{} @acsmem{}}} This function is equivalent to @code{globfree} but it frees records of type @code{glob64_t} which were allocated by @code{glob64}. @@ -842,9 +810,8 @@ compiled regular expression for matching.) There is a special data type for compiled regular expressions: -@comment regex.h -@comment POSIX.2 @deftp {Data Type} regex_t +@standards{POSIX.2, regex.h} This type of object holds a compiled regular expression. It is actually a structure. It has just one field that your programs should look at: @@ -862,9 +829,8 @@ only the functions in the library should use them. After you create a @code{regex_t} object, you can compile a regular expression into it by calling @code{regcomp}. -@comment regex.h -@comment POSIX.2 @deftypefun int regcomp (regex_t *restrict @var{compiled}, const char *restrict @var{pattern}, int @var{cflags}) +@standards{POSIX.2, regex.h} @safety{@prelim{}@mtsafe{@mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsmem{} @acsfd{}}} @c All of the issues have to do with memory allocation and multi-byte @c character handling present in the input string, or implied by ranges @@ -1144,71 +1110,59 @@ describing the reason for a nonzero value; see @ref{Regexp Cleanup}. Here are the possible nonzero values that @code{regcomp} can return: @vtable @code -@comment regex.h -@comment POSIX.2 @item REG_BADBR +@standards{POSIX.2, regex.h} There was an invalid @samp{\@{@dots{}\@}} construct in the regular expression. A valid @samp{\@{@dots{}\@}} construct must contain either a single number, or two numbers in increasing order separated by a comma. -@comment regex.h -@comment POSIX.2 @item REG_BADPAT +@standards{POSIX.2, regex.h} There was a syntax error in the regular expression. -@comment regex.h -@comment POSIX.2 @item REG_BADRPT +@standards{POSIX.2, regex.h} A repetition operator such as @samp{?} or @samp{*} appeared in a bad position (with no preceding subexpression to act on). -@comment regex.h -@comment POSIX.2 @item REG_ECOLLATE +@standards{POSIX.2, regex.h} The regular expression referred to an invalid collating element (one not defined in the current locale for string collation). @xref{Locale Categories}. -@comment regex.h -@comment POSIX.2 @item REG_ECTYPE +@standards{POSIX.2, regex.h} The regular expression referred to an invalid character class name. -@comment regex.h -@comment POSIX.2 @item REG_EESCAPE +@standards{POSIX.2, regex.h} The regular expression ended with @samp{\}. -@comment regex.h -@comment POSIX.2 @item REG_ESUBREG +@standards{POSIX.2, regex.h} There was an invalid number in the @samp{\@var{digit}} construct. -@comment regex.h -@comment POSIX.2 @item REG_EBRACK +@standards{POSIX.2, regex.h} There were unbalanced square brackets in the regular expression. -@comment regex.h -@comment POSIX.2 @item REG_EPAREN +@standards{POSIX.2, regex.h} An extended regular expression had unbalanced parentheses, or a basic regular expression had unbalanced @samp{\(} and @samp{\)}. -@comment regex.h -@comment POSIX.2 @item REG_EBRACE +@standards{POSIX.2, regex.h} The regular expression had unbalanced @samp{\@{} and @samp{\@}}. -@comment regex.h -@comment POSIX.2 @item REG_ERANGE +@standards{POSIX.2, regex.h} One of the endpoints in a range expression was invalid. -@comment regex.h -@comment POSIX.2 @item REG_ESPACE +@standards{POSIX.2, regex.h} @code{regcomp} ran out of memory. @end vtable @@ -1219,25 +1173,21 @@ These are the bit flags that you can use in the @var{cflags} operand when compiling a regular expression with @code{regcomp}. @vtable @code -@comment regex.h -@comment POSIX.2 @item REG_EXTENDED +@standards{POSIX.2, regex.h} Treat the pattern as an extended regular expression, rather than as a basic regular expression. -@comment regex.h -@comment POSIX.2 @item REG_ICASE +@standards{POSIX.2, regex.h} Ignore case when matching letters. -@comment regex.h -@comment POSIX.2 @item REG_NOSUB +@standards{POSIX.2, regex.h} Don't bother storing the contents of the @var{matchptr} array. -@comment regex.h -@comment POSIX.2 @item REG_NEWLINE +@standards{POSIX.2, regex.h} Treat a newline in @var{string} as dividing @var{string} into multiple lines, so that @samp{$} can match before the newline and @samp{^} can match after. Also, don't permit @samp{.} to match a newline, and don't @@ -1255,9 +1205,8 @@ Regexp Compilation}, you can match it against strings using unless the regular expression contains anchor characters (@samp{^} or @samp{$}). -@comment regex.h -@comment POSIX.2 @deftypefun int regexec (const regex_t *restrict @var{compiled}, const char *restrict @var{string}, size_t @var{nmatch}, regmatch_t @var{matchptr}[restrict], int @var{eflags}) +@standards{POSIX.2, regex.h} @safety{@prelim{}@mtsafe{@mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsmem{} @acsfd{}}} @c libc_lock_lock @asulock @aculock @c re_search_internal @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd @@ -1525,16 +1474,14 @@ The function @code{regexec} accepts the following flags in the @var{eflags} argument: @vtable @code -@comment regex.h -@comment POSIX.2 @item REG_NOTBOL +@standards{POSIX.2, regex.h} Do not regard the beginning of the specified string as the beginning of a line; more generally, don't make any assumptions about what text might precede it. -@comment regex.h -@comment POSIX.2 @item REG_NOTEOL +@standards{POSIX.2, regex.h} Do not regard the end of the specified string as the end of a line; more generally, don't make any assumptions about what text might follow it. @end vtable @@ -1542,14 +1489,12 @@ generally, don't make any assumptions about what text might follow it. Here are the possible nonzero values that @code{regexec} can return: @vtable @code -@comment regex.h -@comment POSIX.2 @item REG_NOMATCH +@standards{POSIX.2, regex.h} The pattern didn't match the string. This isn't really an error. -@comment regex.h -@comment POSIX.2 @item REG_ESPACE +@standards{POSIX.2, regex.h} @code{regexec} ran out of memory. @end vtable @@ -1565,9 +1510,8 @@ the entire regular expression. Each other element of the array records the beginning and end of the part that matched a single parenthetical subexpression. -@comment regex.h -@comment POSIX.2 @deftp {Data Type} regmatch_t +@standards{POSIX.2, regex.h} This is the data type of the @var{matchptr} array that you pass to @code{regexec}. It contains two structure fields, as follows: @@ -1581,9 +1525,8 @@ The offset in @var{string} of the end of the substring. @end table @end deftp -@comment regex.h -@comment POSIX.2 @deftp {Data Type} regoff_t +@standards{POSIX.2, regex.h} @code{regoff_t} is an alias for another signed integer type. The fields of @code{regmatch_t} have type @code{regoff_t}. @end deftp @@ -1658,9 +1601,8 @@ reports nonuse of the ``na'' subexpression. When you are finished using a compiled regular expression, you can free the storage it uses by calling @code{regfree}. -@comment regex.h -@comment POSIX.2 @deftypefun void regfree (regex_t *@var{compiled}) +@standards{POSIX.2, regex.h} @safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} @c (re_)free dup @ascuheap @acsmem @c free_dfa_content dup @ascuheap @acsmem @@ -1678,9 +1620,8 @@ expression. When @code{regcomp} or @code{regexec} reports an error, you can use the function @code{regerror} to turn it into an error message string. -@comment regex.h -@comment POSIX.2 @deftypefun size_t regerror (int @var{errcode}, const regex_t *restrict @var{compiled}, char *restrict @var{buffer}, size_t @var{length}) +@standards{POSIX.2, regex.h} @safety{@prelim{}@mtsafe{@mtsenv{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsfd{} @acsmem{}}} @c regerror calls gettext, strcmp and mempcpy or memcpy. This function produces an error message string for the error code @@ -1816,9 +1757,8 @@ vector, @code{wordexp} uses a special data type, @code{wordexp_t}, which is a structure. You pass @code{wordexp} the address of the structure, and it fills in the structure's fields to tell you about the results. -@comment wordexp.h -@comment POSIX.2 @deftp {Data Type} {wordexp_t} +@standards{POSIX.2, wordexp.h} This data type holds a pointer to a word vector. More precisely, it records both the address of the word vector and its size. @@ -1845,9 +1785,8 @@ the beginning of the vector. @end table @end deftp -@comment wordexp.h -@comment POSIX.2 @deftypefun int wordexp (const char *@var{words}, wordexp_t *@var{word-vector-ptr}, int @var{flags}) +@standards{POSIX.2, wordexp.h} @safety{@prelim{}@mtunsafe{@mtasurace{:utent} @mtasuconst{:@mtsenv{}} @mtsenv{} @mtascusig{:ALRM} @mtascutimer{} @mtslocale{}}@asunsafe{@ascudlopen{} @ascuplugin{} @ascuintl{} @ascuheap{} @asucorrupt{} @asulock{}}@acunsafe{@acucorrupt{} @aculock{} @acsfd{} @acsmem{}}} @c wordexp @mtasurace:utent @mtasuconst:@mtsenv @mtsenv @mtascusig:ALRM @mtascutimer @mtslocale @ascudlopen @ascuplugin @ascuintl @ascuheap @asucorrupt @asulock @acucorrupt @aculock @acsfd @acsmem @c w_newword ok @@ -2014,43 +1953,37 @@ If @code{wordexp} succeeds, it returns 0. Otherwise, it returns one of these error codes: @vtable @code -@comment wordexp.h -@comment POSIX.2 @item WRDE_BADCHAR +@standards{POSIX.2, wordexp.h} The input string @var{words} contains an unquoted invalid character such as @samp{|}. -@comment wordexp.h -@comment POSIX.2 @item WRDE_BADVAL +@standards{POSIX.2, wordexp.h} The input string refers to an undefined shell variable, and you used the flag @code{WRDE_UNDEF} to forbid such references. -@comment wordexp.h -@comment POSIX.2 @item WRDE_CMDSUB +@standards{POSIX.2, wordexp.h} The input string uses command substitution, and you used the flag @code{WRDE_NOCMD} to forbid command substitution. -@comment wordexp.h -@comment POSIX.2 @item WRDE_NOSPACE +@standards{POSIX.2, wordexp.h} It was impossible to allocate memory to hold the result. In this case, @code{wordexp} can store part of the results---as much as it could allocate room for. -@comment wordexp.h -@comment POSIX.2 @item WRDE_SYNTAX +@standards{POSIX.2, wordexp.h} There was a syntax error in the input string. For example, an unmatched quoting character is a syntax error. This error code is also used to signal division by zero and overflow in arithmetic expansion. @end vtable @end deftypefun -@comment wordexp.h -@comment POSIX.2 @deftypefun void wordfree (wordexp_t *@var{word-vector-ptr}) +@standards{POSIX.2, wordexp.h} @safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{} @ascuheap{}}@acunsafe{@acucorrupt{} @acsmem{}}} @c wordfree dup @asucorrupt @ascuheap @acucorrupt @acsmem @c free dup @ascuheap @acsmem @@ -2068,9 +2001,8 @@ This section describes the flags that you can specify in the and combine them with the C operator @code{|}. @vtable @code -@comment wordexp.h -@comment POSIX.2 @item WRDE_APPEND +@standards{POSIX.2, wordexp.h} Append the words from this expansion to the vector of words produced by previous calls to @code{wordexp}. This way you can effectively expand several words as if they were concatenated with spaces between them. @@ -2080,22 +2012,19 @@ word vector structure between calls to @code{wordexp}. And, if you set @code{WRDE_DOOFFS} in the first call to @code{wordexp}, you must also set it when you append to the results. -@comment wordexp.h -@comment POSIX.2 @item WRDE_DOOFFS +@standards{POSIX.2, wordexp.h} Leave blank slots at the beginning of the vector of words. The @code{we_offs} field says how many slots to leave. The blank slots contain null pointers. -@comment wordexp.h -@comment POSIX.2 @item WRDE_NOCMD +@standards{POSIX.2, wordexp.h} Don't do command substitution; if the input requests command substitution, report an error. -@comment wordexp.h -@comment POSIX.2 @item WRDE_REUSE +@standards{POSIX.2, wordexp.h} Reuse a word vector made by a previous call to @code{wordexp}. Instead of allocating a new vector of words, this call to @code{wordexp} will use the vector that already exists (making it larger if necessary). @@ -2104,17 +2033,15 @@ Note that the vector may move, so it is not safe to save an old pointer and use it again after calling @code{wordexp}. You must fetch @code{we_pathv} anew after each call. -@comment wordexp.h -@comment POSIX.2 @item WRDE_SHOWERR +@standards{POSIX.2, wordexp.h} Do show any error messages printed by commands run by command substitution. More precisely, allow these commands to inherit the standard error output stream of the current process. By default, @code{wordexp} gives these commands a standard error stream that discards all output. -@comment wordexp.h -@comment POSIX.2 @item WRDE_UNDEF +@standards{POSIX.2, wordexp.h} If the input refers to a shell variable that is not defined, report an error. @end vtable |