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    Command:

    glob

    
    
    
    

    SYNOPSIS

           #include <glob.h>
    
           int glob(const char *pattern, int flags,
                    int (*errfunc) (const char *epath, int eerrno),
                    glob_t *pglob);
           void globfree(glob_t *pglob);
    
    
    

    DESCRIPTION

           The glob() function searches for all  the  pathnames  matching  pattern
           according  to  the  rules  used  by  the shell (see glob(7)).  No tilde
           expansion or parameter substitution is done; if  you  want  these,  use
           wordexp(3).
    
           The globfree() function frees the dynamically allocated storage from an
           earlier call to glob().
    
           The results of a glob() call are stored in the structure pointed to  by
           pglob.   This  structure  is  of type glob_t (declared in <glob.h>) and
           includes the following elements defined by POSIX.2 (more may be present
           as an extension):
    
               typedef struct {
                   size_t   gl_pathc;    /* Count of paths matched so far  */
                   char   **gl_pathv;    /* List of matched pathnames.  */
                   size_t   gl_offs;     /* Slots to reserve in gl_pathv.  */
               } glob_t;
    
           Results are stored in dynamically allocated storage.
    
           The  argument  flags  is  made up of the bitwise OR of zero or more the
           following symbolic constants, which modify the behavior of glob():
    
           GLOB_ERR
                  Return upon a read error (because a directory does not have read
                  permission,  for example).  By default, glob() attempts carry on
                  despite errors, reading all of the directories that it can.
    
           GLOB_MARK
                  Append a slash to each path which corresponds to a directory.
    
           GLOB_NOSORT
                  Don't sort the returned pathnames.  The only reason to  do  this
                  is  to save processing time.  By default, the returned pathnames
                  are sorted.
    
           GLOB_DOOFFS
                  Reserve pglob->gl_offs slots at the beginning  of  the  list  of
                  strings in pglob->pathv.  The reserved slots contain null point-
                  ers.
    
    
           flags may also include any of the following, which are  GNU  extensions
           and not defined by POSIX.2:
    
           GLOB_PERIOD
                  Allow  a  leading  period  to  be matched by metacharacters.  By
                  default, metacharacters can't match a leading period.
    
           GLOB_ALTDIRFUNC
                  Use alternative functions pglob->gl_closedir, pglob->gl_readdir,
                  pglob->gl_opendir,   pglob->gl_lstat,   and  pglob->gl_stat  for
                  filesystem access instead of the normal library functions.
    
           GLOB_BRACE
                  Expand csh(1) style brace expressions of the form {a,b}.   Brace
                  expressions  can  be  nested.  Thus, for example, specifying the
                  pattern "{foo/{,cat,dog},bar}" would return the same results  as
                  four separate glob() calls using the strings: "foo/", "foo/cat",
                  "foo/dog", and "bar".
    
           GLOB_NOMAGIC
                  If the pattern contains no  metacharacters  then  it  should  be
                  returned  as  the  sole  matching word, even if there is no file
                  with that name.
    
           GLOB_TILDE
                  Carry out tilde expansion.  If a tilde ('~') is the only charac-
                  ter  in the pattern, or an initial tilde is followed immediately
                  by a slash ('/'), then the home directory of the caller is  sub-
                  stituted  for  the  tilde.  If an initial tilde is followed by a
                  username (e.g., "~andrea/bin"), then the tilde and username  are
                  substituted by the home directory of that user.  If the username
                  is invalid, or the home directory cannot be determined, then  no
                  substitution is performed.
    
           GLOB_TILDE_CHECK
                  This  provides behavior similar to that of GLOB_TILDE.  The dif-
                  ference is that if the username is invalid, or the  home  direc-
                  tory  cannot  be  determined,  then instead of using the pattern
                  itself as the name, glob() returns GLOB_NOMATCH to  indicate  an
                  error.
    
           GLOB_ONLYDIR
                  This  is  a hint to glob() that the caller is interested only in
                  directories that match the pattern.  If the  implementation  can
                  easily  determine file-type information, then nondirectory files
                  are not returned to the caller.  However, the caller must  still
                  check that returned files are directories.  (The purpose of this
                  flag is merely to optimize performance when the caller is inter-
                  ested only in directories.)
    
           If  errfunc is not NULL, it will be called in case of an error with the
           As a GNU extension, pglob->gl_flags is set to the flags specified, ored
           with GLOB_MAGCHAR if any metacharacters were found.
    
    
    

    RETURN VALUE

           On  successful completion, glob() returns zero.  Other possible returns
           are:
    
           GLOB_NOSPACE
                  for running out of memory,
    
           GLOB_ABORTED
                  for a read error, and
    
           GLOB_NOMATCH
                  for no found matches.
    
    
    

    CONFORMING TO

           POSIX.2, POSIX.1-2001.
    
    
    

    NOTES

           The structure elements gl_pathc and gl_offs are declared as  size_t  in
           glibc  2.1, as they should be according to POSIX.2, but are declared as
           int in libc4, libc5 and glibc 2.0.
    
    
    

    BUGS

           The glob() function may fail due  to  failure  of  underlying  function
           calls,  such  as malloc(3) or opendir(3).  These will store their error
           code in errno.
    
    
    

    EXAMPLE

           One example of use is the following code, which simulates typing
    
               ls -l *.c ../*.c
    
           in the shell:
    
               glob_t globbuf;
    
               globbuf.gl_offs = 2;
               glob("*.c", GLOB_DOOFFS, NULL, &globbuf);
               glob("../*.c", GLOB_DOOFFS | GLOB_APPEND, NULL, &globbuf);
               globbuf.gl_pathv[0] = "ls";
               globbuf.gl_pathv[1] = "-l";
               execvp("ls", &globbuf.gl_pathv[0]);
    
    
    

    SEE ALSO

           ls(1), sh(1),  stat(2),  exec(3),  fnmatch(3),  malloc(3),  opendir(3),
           readdir(3), wordexp(3), glob(7)
    
    
    

    GNU 2007-10-10 GLOB(3)

    
    
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