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