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- SCANDIR C Library Procedures SCANDIR
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- NNAAMMEE
- scandir, alphasort - scan a directory
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- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ssyyss//ttyyppeess..hh>>
- ##iinncclluuddee <<ssyyss//ddiirr..hh>>
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- ssccaannddiirr((ddiirrnnaammee,, nnaammeelliisstt,, sseelleecctt,, ccoommppaarr))
- cchhaarr **ddiirrnnaammee;;
- ssttrruucctt ddiirreecctt **((**nnaammeelliisstt[[]]));;
- iinntt ((**sseelleecctt))(());;
- iinntt ((**ccoommppaarr))(());;
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- aallpphhaassoorrtt((dd11,, dd22))
- ssttrruucctt ddiirreecctt ****dd11,, ****dd22;;
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- DDEESSCCRRIIPPTTIIOONN
- _S_c_a_n_d_i_r reads the directory _d_i_r_n_a_m_e and builds an array of
- pointers to directory entries using _m_a_l_l_o_c(3). It returns
- the number of entries in the array and a pointer to the
- array through _n_a_m_e_l_i_s_t.
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- The _s_e_l_e_c_t parameter is a pointer to a user supplied subrou-
- tine which is called by _s_c_a_n_d_i_r to select which entries are
- to be included in the array. The select routine is passed a
- pointer to a directory entry and should return a non-zero
- value if the directory entry is to be included in the array.
- If _s_e_l_e_c_t is null, then all the directory entries will be
- included.
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- The _c_o_m_p_a_r parameter is a pointer to a user supplied subrou-
- tine which is passed to _q_s_o_r_t(3) to sort the completed
- array. If this pointer is null, the array is not sorted.
- _A_l_p_h_a_s_o_r_t is a routine which can be used for the _c_o_m_p_a_r
- parameter to sort the array alphabetically.
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- The memory allocated for the array can be deallocated with
- _f_r_e_e (see _m_a_l_l_o_c(3)) by freeing each pointer in the array
- and the array itself.
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- SSEEEE AALLSSOO
- directory(3), malloc(3), qsort(3), dir(5)
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- DDIIAAGGNNOOSSTTIICCSS
- Returns -1 if the directory cannot be opened for reading or
- if _m_a_l_l_o_c(3) cannot allocate enough memory to hold all the
- data structures.
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- Sprite v1.0 September 17, 1985 1
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