4.3BSD - /usr/src/new/cpm/src/cclose.c

   1: /*	cclose.c	1.10	83/05/13	*/
   2: #include <stdio.h>
   3: #include "cpmio.h"
   4: #include "cpmfio.h"
   5: 
   6: /*
   7:  * Close cp/m file
   8:  * If the file was opened for write, flush
   9:  * buffer to disk and update directory
  10:  */
  11: 
  12: c_close(fptr)
  13:     register C_FILE *fptr;
  14: {
  15:     int scts = 0;
  16: 
  17: #ifdef DEBUG
  18:     printf("c_close: cnt: %d\n", fptr->c_cnt);
  19: #endif
  20:     if (fptr->c_flag & WRITE) {
  21:         scts = (blksiz - fptr->c_cnt)/seclth + 1;
  22:         if (fptr->c_cnt%seclth == 0)
  23:             scts--;
  24:         fptr->c_dirp->blkcnt = scts + fptr->c_seccnt;
  25:         if (fptr->c_cnt < blksiz) {
  26:             /*
  27: 		 	 * zero fill to end, and flush
  28: 		 	 * the block to disk
  29: 		 	 */
  30:             if ((fptr->c_flag&BINARY) == 0) {
  31:                 /*
  32: 			 	 * add cp/m eof mark (ctrl-z) if the file
  33: 			 	 * is not a binary file
  34: 			 	 */
  35:                 *(fptr->c_buf++) = '\032';
  36:                 fptr->c_cnt--;
  37:             }
  38:             while (fptr->c_cnt-- > 0)
  39:                 *(fptr->c_buf++) = '\0';
  40:         }
  41:         if (putblock(0xff&(int)fptr->c_dirp->pointers[fptr->c_blk],
  42:                         fptr->c_base, scts) == EOF)
  43:             return (EOF);
  44:     }
  45:     savedir();
  46: 
  47:     /* deallocate buffer memory and file descriptor */
  48:     fptr->c_flag = 0;
  49:     free(fptr->c_base);
  50:     return (NULL);
  51: }

Defined functions