version 1, including all changes.
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perry |
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SCANDIR |
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!!!SCANDIR |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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RETURN VALUE |
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ERRORS |
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CONFORMING TO |
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EXAMPLE |
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SEE ALSO |
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---- |
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!!NAME |
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scandir, alphasort, versionsort - scan a directory for matching entries |
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!!SYNOPSIS |
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__#include |
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__''dir''__, struct dirent ***__''namelist''__, |
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int (*__''select''__)(const struct dirent *), |
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int (*__''compar''__)(const void *, const void *)); |
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int alphasort(const void *__''a''__, const void *__''b''__); |
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int versionsort(const void *__''a''__, const void *__''b''__); |
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__ |
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!!DESCRIPTION |
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The __scandir()__ function scans the directory |
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''dir'', calling __select()__ on each directory entry. |
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Entries for which __select()__ returns non-zero are |
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stored in strings allocated via __malloc()__, sorted |
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using __qsort()__ with the comparison function |
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__compar()__, and collected in array ''namelist'' |
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which is allocated via __malloc()__. |
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The __alphasort()__ and __versionsort()__ functions |
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can be used as the comparison function for the |
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__scandir()__ function to sort the directory entries into |
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alphabetical order. Although they parameters point to void, |
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they are in fact pointers to pointers (__struct |
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dirent**__) to two directory entries, ''a'' and |
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''b'', to compare. |
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__alphasort()__ will order the files with |
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strcoll(3), while __versionsort()__ will use |
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strverscmp(3). |
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!!RETURN VALUE |
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The __scandir()__ function returns the number of |
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directory entries selected or -1 if an error |
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occurs. |
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The __alphasort()__ and __versionsort()__ functions |
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return an integer less than, equal to, or greater than zero |
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if the first argument is considered to be respectively less |
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than, equal to, or greater than the second. |
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!!ERRORS |
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__ENOMEM__ |
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Insufficient memory to complete the operation. |
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!!CONFORMING TO |
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BSD 4.3 |
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!!EXAMPLE |
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/* print files in current directory in reverse order */ |
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#include |
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!!SEE ALSO |
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opendir(3), readdir(3), closedir(3), |
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rewinddir(3), telldir(3), |
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seekdir(3) |
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---- |
