Manual Pages for UNIX Operating System command usage for man alphasort

Standard C Library Functions                          scandir(3C)



NAME
     scandir, alphasort - scan a directory

SYNOPSIS
     #include 
     #include 

     int scandir(const char *dirname, struct dirent *(*namelist[]),
          int (*select)(const struct dirent *),
          int (*dcomp)(const struct dirent  **,
          const struct dirent **));


     int alphasort(const struct dirent **d1,
          const struct dirent **d2);


DESCRIPTION
     The scandir() function reads  the  directory  dirname  using
     readdir(3C)  and  builds  an  array of pointers to directory
     entries using malloc(3C). The namelist argument is a pointer
     to  an array of structure pointers. The select argument is a
     pointer to a routine that is called  with  a  pointer  to  a
     directory  entry  and returns a non-zero value if the direc-
     tory entry is included in the  array.  If  this  pointer  is
     NULL, then all the directory entries are included. The dcomp
     argument is a  pointer  to  a  routine  that  is  passed  to
     qsort(3C),  which sorts the completed array. If this pointer
     is NULL, the array is not sorted.


     The alphasort() function can be used as the dcomp() function
     parameter  for  the scandir() function to sort the directory
     entries into alphabetical order, as if  by  the  strcoll(3C)
     function.  Its  arguments  are  the two directory entries to
     compare.

RETURN VALUES
     The scandir() function returns the number of entries in  the
     array  and a pointer to the array through the namelist argu-
     ment. When an error is encountered, scandir() returns -1 and
     errno is set to indicate the error.


     The alphasort() function returns an  integer  greater  than,
     equal to, or less than 0 if the directory entry name pointed
     to by d1 is greater than, equal to, or less than the  direc-
     tory  entry  name pointed to by d2 when both are interpreted
     as appropriate to the current locale.  There  is  no  return
     value reserved to indicate an error.





SunOS 5.11           Last change: 4 May 2004                    1






Standard C Library Functions                          scandir(3C)



ERRORS
     The scandir() function will fail if:

     EOVERFLOW    The number of  directory  entries  exceeds  the
                  number that can be represented by an int.


USAGE
     The scandir() and alphasort()  functions  have  transitional
     interfaces for 64-bit file offsets. See lf64(5).

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | See below.                  |
    |_____________________________|_____________________________|



     The scandir() function is Unsafe. The  alphasort()  function
     is Safe.

SEE ALSO
     malloc(3C),  qsort(3C),  readdir(3C),  strcoll(3C),   attri-
     butes(5), lf64(5)






















SunOS 5.11           Last change: 4 May 2004                    2