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Annotation of researchv10dc/cmd/asd/readdir.c, revision 1.1

1.1     ! root        1: /* Copyright (c) 1982 Regents of the University of California */
        !             2: 
        !             3: #include "config.h"
        !             4: #ifdef LOCALDIR
        !             5: #include <sys/types.h>
        !             6: #include "ndir.h"
        !             7: 
        !             8: static char sccsid[] = "@(#)readdir.c 4.2 3/12/82";
        !             9: 
        !            10: /*
        !            11:  * read an old stlye directory entry and present it as a new one
        !            12:  */
        !            13: #define        ODIRSIZ 14
        !            14: 
        !            15: struct olddirect {
        !            16:        ino_t   d_ino;
        !            17:        char    d_name[ODIRSIZ];
        !            18: };
        !            19: 
        !            20: /*
        !            21:  * get next entry in a directory.
        !            22:  */
        !            23: struct direct *
        !            24: readdir(dirp)
        !            25:        register DIR *dirp;
        !            26: {
        !            27:        register struct olddirect *dp;
        !            28:        static struct direct dir;
        !            29: 
        !            30:        for (;;) {
        !            31:                if (dirp->dd_loc == 0) {
        !            32:                        dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, 
        !            33:                            DIRBLKSIZ);
        !            34:                        if (dirp->dd_size <= 0)
        !            35:                                return NULL;
        !            36:                }
        !            37:                if (dirp->dd_loc >= dirp->dd_size) {
        !            38:                        dirp->dd_loc = 0;
        !            39:                        continue;
        !            40:                }
        !            41:                dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
        !            42:                dirp->dd_loc += sizeof(struct olddirect);
        !            43:                if (dp->d_ino == 0)
        !            44:                        continue;
        !            45:                dir.d_ino = dp->d_ino;
        !            46:                strncpy(dir.d_name, dp->d_name, ODIRSIZ);
        !            47:                dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
        !            48:                dir.d_namlen = strlen(dir.d_name);
        !            49:                dir.d_reclen = DIRSIZ(&dir);
        !            50:                return (&dir);
        !            51:        }
        !            52: }
        !            53: #endif

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