contrib/nvi2/ex/ex_file.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "$Id: ex_file.c,v 10.14 2001/06/25 15:19:16 skimo Exp $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/time.h>
  19
  20 #include <bitstring.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "../common/common.h"
  28
  29 /*
  30  * ex_file -- :f[ile] [name]
  31  *      Change the file's name and display the status line.
  32  *
  33  * PUBLIC: int ex_file(SCR *, EXCMD *);
  34  */
  35 int
  36 ex_file(SCR *sp, EXCMD *cmdp)
  37 {
  38         char *p;
  39         FREF *frp;
  40         char *np;
  41         size_t nlen;
  42
  43         NEEDFILE(sp, cmdp);
  44
  45         switch (cmdp->argc) {
  46         case 0:
  47                 break;
  48         case 1:
  49                 frp = sp->frp;
  50
  51                 /* Make sure can allocate enough space. */
  52                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  53                             np, nlen);
  54                 if ((p = v_strdup(sp, np, nlen - 1)) == NULL)
  55                         return (1);
  56
  57                 /* If already have a file name, it becomes the alternate. */
  58                 if (!F_ISSET(frp, FR_TMPFILE))
  59                         set_alt_name(sp, frp->name);
  60
  61                 /* Free the previous name. */
  62                 free(frp->name);
  63                 frp->name = p;
  64
  65                 /*
  66                  * The file has a real name, it's no longer a temporary,
  67                  * clear the temporary file flags.
  68                  */
  69                 F_CLR(frp, FR_TMPEXIT | FR_TMPFILE);
  70
  71                 /* Have to force a write if the file exists, next time. */
  72                 F_SET(frp, FR_NAMECHANGE);
  73
  74                 /* Notify the screen. */
  75                 (void)sp->gp->scr_rename(sp, sp->frp->name, 1);
  76                 break;
  77         default:
  78                 abort();
  79         }
  80         msgq_status(sp, sp->lno, MSTAT_SHOWLAST);
  81         return (0);
  82 }