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Annotation of 43BSD/usr.lib/sendmail/lib/libndir/readdir.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1982 Regents of the University of California */
                      2: 
                      3: static char sccsid[] = "@(#)readdir.c 4.3 8/8/82";
                      4: 
                      5: #include <sys/types.h>
                      6: #include <dir.h>
                      7: 
                      8: /*
                      9:  * read an old stlye directory entry and present it as a new one
                     10:  */
                     11: #define        ODIRSIZ 14
                     12: 
                     13: struct olddirect {
                     14:        ino_t   od_ino;
                     15:        char    od_name[ODIRSIZ];
                     16: };
                     17: 
                     18: /*
                     19:  * get next entry in a directory.
                     20:  */
                     21: struct direct *
                     22: readdir(dirp)
                     23:        register DIR *dirp;
                     24: {
                     25:        register struct olddirect *dp;
                     26:        static struct direct dir;
                     27: 
                     28:        for (;;) {
                     29:                if (dirp->dd_loc == 0) {
                     30:                        dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, 
                     31:                            DIRBLKSIZ);
                     32:                        if (dirp->dd_size <= 0)
                     33:                                return NULL;
                     34:                }
                     35:                if (dirp->dd_loc >= dirp->dd_size) {
                     36:                        dirp->dd_loc = 0;
                     37:                        continue;
                     38:                }
                     39:                dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
                     40:                dirp->dd_loc += sizeof(struct olddirect);
                     41:                if (dp->od_ino == 0)
                     42:                        continue;
                     43:                dir.d_ino = dp->od_ino;
                     44:                strncpy(dir.d_name, dp->od_name, ODIRSIZ);
                     45:                dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
                     46:                dir.d_namlen = strlen(dir.d_name);
                     47:                dir.d_reclen = DIRBLKSIZ;
                     48:                return (&dir);
                     49:        }
                     50: }

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