Return to ndir.c CVS log

Up to [CSRG BSD Unix] / 43BSD / contrib / news / src

Annotation of 43BSD/contrib/news/src/ndir.c, revision 1.1

1.1     ! root        1: #include "defs.h"
        !             2: #if !defined(BSD4_2) && !defined(BSD4_1C)
        !             3: #include <sys/param.h>
        !             4: #include "ndir.h"
        !             5: 
        !             6: #ifdef SCCSID
        !             7: static char    *SccsId = "@(#)ndir.c   1.8     4/26/85";
        !             8: #endif /* SCCSID */
        !             9: 
        !            10: /*
        !            11:  * support for Berkeley directory reading routine on a V7 file system
        !            12:  */
        !            13: 
        !            14: extern char *malloc();
        !            15: 
        !            16: /*
        !            17:  * open a directory.
        !            18:  */
        !            19: DIR *
        !            20: opendir(name)
        !            21: char *name;
        !            22: {
        !            23:        register DIR *dirp;
        !            24:        register int fd;
        !            25: 
        !            26:        if ((fd = open(name, 0)) == -1)
        !            27:                return NULL;
        !            28:        if ((dirp = (DIR *)malloc(sizeof(DIR))) == NULL) {
        !            29:                close (fd);
        !            30:                return NULL;
        !            31:        }
        !            32:        dirp->dd_fd = fd;
        !            33:        dirp->dd_loc = 0;
        !            34:        return dirp;
        !            35: }
        !            36: 
        !            37: /*
        !            38:  * read an old style directory entry and present it as a new one
        !            39:  */
        !            40: #ifdef pyr
        !            41: /* Pyramid in the AT&T universe */
        !            42: #define ODIRSIZ 248
        !            43: struct olddirect {
        !            44:        long    od_ino;
        !            45:        short   od_fill1, od_fill2;
        !            46:        char od_name[ODIRSIZ];
        !            47: };
        !            48: #else /* V7 file system */
        !            49: #define        ODIRSIZ 14
        !            50: 
        !            51: struct olddirect {
        !            52:        short   od_ino;
        !            53:        char    od_name[ODIRSIZ];
        !            54: };
        !            55: #endif /* V7 */
        !            56: 
        !            57: /*
        !            58:  * get next entry in a directory.
        !            59:  */
        !            60: struct direct *
        !            61: readdir(dirp)
        !            62: register DIR *dirp;
        !            63: {
        !            64:        register struct olddirect *dp;
        !            65:        static struct direct dir;
        !            66: 
        !            67:        for (;;) {
        !            68:                if (dirp->dd_loc == 0) {
        !            69:                        dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, 
        !            70:                            DIRBLKSIZ);
        !            71:                        if (dirp->dd_size <= 0)
        !            72:                                return NULL;
        !            73:                }
        !            74:                if (dirp->dd_loc >= dirp->dd_size) {
        !            75:                        dirp->dd_loc = 0;
        !            76:                        continue;
        !            77:                }
        !            78:                dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
        !            79:                dirp->dd_loc += sizeof(struct olddirect);
        !            80:                if (dp->od_ino == 0)
        !            81:                        continue;
        !            82:                dir.d_ino = dp->od_ino;
        !            83:                strncpy(dir.d_name, dp->od_name, ODIRSIZ);
        !            84:                dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
        !            85:                dir.d_namlen = strlen(dir.d_name);
        !            86:                dir.d_reclen = DIRSIZ(&dir);
        !            87:                return (&dir);
        !            88:        }
        !            89: }
        !            90: 
        !            91: /*
        !            92:  * close a directory.
        !            93:  */
        !            94: void
        !            95: closedir(dirp)
        !            96: register DIR *dirp;
        !            97: {
        !            98:        close(dirp->dd_fd);
        !            99:        dirp->dd_fd = -1;
        !           100:        dirp->dd_loc = 0;
        !           101:        free((char *)dirp);
        !           102: }
        !           103: #endif /* !BSD4_2 && !BSD4_1C */

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