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Annotation of researchv10no/cmd/netnews/src/readdir.c, revision 1.1.1.1

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

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