Return to scandir.c CVS log

Up to [CSRG BSD Unix] / 43BSD / contrib / jove

Annotation of 43BSD/contrib/jove/scandir.c, revision 1.1

1.1     ! root        1: /*************************************************************************
        !             2:  * This program is copyright (C) 1985, 1986 by Jonathan Payne.  It is    *
        !             3:  * provided to you without charge for use only on a licensed Unix        *
        !             4:  * system.  You may copy JOVE provided that this notice is included with *
        !             5:  * the copy.  You may not sell copies of this program or versions        *
        !             6:  * modified for use on microcomputer systems, unless the copies are      *
        !             7:  * included with a Unix system distribution and the source is provided.  *
        !             8:  *************************************************************************/
        !             9: 
        !            10: #include "jove.h"
        !            11: #include <sys/stat.h>
        !            12: #include <sys/dir.h>
        !            13: 
        !            14: #ifdef F_COMPLETION
        !            15: 
        !            16: #ifdef BSD4_2
        !            17: 
        !            18: #define DIRSIZE(entry) DIRSIZ(entry)
        !            19: 
        !            20: #else
        !            21: 
        !            22: #define DIRSIZE(entry) (min(strlen(entry->d_name), DIRSIZ))
        !            23: 
        !            24: typedef struct {
        !            25:        int     d_fd;           /* File descriptor for this directory */
        !            26: } DIR;
        !            27: 
        !            28: DIR *
        !            29: opendir(dir)
        !            30: char   *dir;
        !            31: {
        !            32:        DIR     *dp = (DIR *) malloc(sizeof *dp);
        !            33:        struct stat     stbuf;
        !            34: 
        !            35:        if ((dp->d_fd = open(dir, 0)) == -1)
        !            36:                return 0;
        !            37:        if ((fstat(dp->d_fd, &stbuf) == -1) || !(stbuf.st_mode & S_IFDIR)) {
        !            38:                closedir(dp);
        !            39:                return 0;       /* this isn't a directory! */
        !            40:        }
        !            41:        return dp;
        !            42: }
        !            43: 
        !            44: closedir(dp)
        !            45: DIR    *dp;
        !            46: {
        !            47:        (void) close(dp->d_fd);
        !            48:        free((char *) dp);
        !            49: }
        !            50: 
        !            51: struct direct *
        !            52: readdir(dp)
        !            53: DIR    *dp;
        !            54: {
        !            55:        static struct direct    dir;
        !            56: 
        !            57:        do
        !            58:                if (read(dp->d_fd, &dir, sizeof dir) != sizeof dir)
        !            59:                        return 0;
        !            60:        while (dir.d_ino == 0);
        !            61: 
        !            62:        return &dir;
        !            63: }
        !            64: 
        !            65: #endif BSD4_2
        !            66: 
        !            67: /* Scandir returns the number of entries or -1 if the directory cannoot
        !            68:    be opened or malloc fails. */
        !            69: 
        !            70: scandir(dir, nmptr, qualify, sorter)
        !            71: char   *dir;
        !            72: char   ***nmptr;
        !            73: int    (*qualify)();
        !            74: int    (*sorter)();
        !            75: {
        !            76:        DIR     *dirp;
        !            77:        struct direct   *entry;
        !            78:        char    **ourarray;
        !            79:        unsigned int    nalloc = 10,
        !            80:                        nentries = 0;
        !            81: 
        !            82:        if ((dirp = opendir(dir)) == 0)
        !            83:                return -1;
        !            84:        if ((ourarray = (char **) malloc(nalloc * sizeof (char *))) == 0)
        !            85: memfail:       complain("[Malloc failed: cannot scandir]");
        !            86:        while ((entry = readdir(dirp)) != 0) {
        !            87:                if (qualify != 0 && (*qualify)(entry->d_name) == 0)
        !            88:                        continue;
        !            89:                if (nentries == nalloc) {
        !            90:                        ourarray = (char **) realloc((char *) ourarray, (nalloc += 10) * sizeof (char *));
        !            91:                        if (ourarray == 0)
        !            92:                                goto memfail;
        !            93:                }
        !            94:                ourarray[nentries] = (char *) malloc(DIRSIZE(entry) + 1);
        !            95:                null_ncpy(ourarray[nentries], entry->d_name, (int) DIRSIZE(entry));
        !            96:                nentries++;
        !            97:        }
        !            98:        closedir(dirp);
        !            99:        if ((nentries + 1) != nalloc)
        !           100:                ourarray = (char **) realloc((char *) ourarray,
        !           101:                                        ((nentries + 1) * sizeof (char *)));
        !           102:        if (sorter != 0)
        !           103:                qsort((char *) ourarray, nentries, sizeof (char **), sorter);
        !           104:        *nmptr = ourarray;
        !           105:        ourarray[nentries] = 0;         /* guaranteed 0 pointer */
        !           106: 
        !           107:        return nentries;
        !           108: }
        !           109: 
        !           110: freedir(nmptr, nentries)
        !           111: char   ***nmptr;
        !           112: {
        !           113:        char    **ourarray = *nmptr;
        !           114: 
        !           115:        while (--nentries >= 0)
        !           116:                free(*ourarray++);
        !           117:        free((char *) *nmptr);
        !           118:        *nmptr = 0;
        !           119: }
        !           120: 
        !           121: alphacomp(a, b)
        !           122: char   **a,
        !           123:        **b;
        !           124: {
        !           125:        return strcmp(*a, *b);
        !           126: }
        !           127: 
        !           128: #endif

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.