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 #include <sys/types.h>
  13 #include <sys/queue.h>
  14 #include <sys/time.h>
  15
  16 #include <bitstring.h>
  17 #include <errno.h>
  18 #include <limits.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "../common/common.h"
  24
  25 /*
  26  * ex_file -- :f[ile] [name]
  27  *      Change the file's name and display the status line.
  28  *
  29  * PUBLIC: int ex_file(SCR *, EXCMD *);
  30  */
  31 int
  32 ex_file(SCR *sp, EXCMD *cmdp)
  33 {
  34         char *p;
  35         FREF *frp;
  36         char *np;
  37         size_t nlen;
  38
  39         NEEDFILE(sp, cmdp);
  40
  41         switch (cmdp->argc) {
  42         case 0:
  43                 break;
  44         case 1:
  45                 frp = sp->frp;
  46
  47                 /* Make sure can allocate enough space. */
  48                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  49                             np, nlen);
  50                 if ((p = v_strdup(sp, np, nlen - 1)) == NULL)
  51                         return (1);
  52
  53                 /* If already have a file name, it becomes the alternate. */
  54                 if (!F_ISSET(frp, FR_TMPFILE))
  55                         set_alt_name(sp, frp->name);
  56
  57                 /* Free the previous name. */
  58                 free(frp->name);
  59                 frp->name = p;
  60
  61                 /*
  62                  * The file has a real name, it's no longer a temporary,
  63                  * clear the temporary file flags.
  64                  */
  65                 F_CLR(frp, FR_TMPEXIT | FR_TMPFILE);
  66
  67                 /* Have to force a write if the file exists, next time. */
  68                 F_SET(frp, FR_NAMECHANGE);
  69
  70                 /* Notify the screen. */
  71                 (void)sp->gp->scr_rename(sp, sp->frp->name, 1);
  72                 break;
  73         default:
  74                 abort();
  75         }
  76         msgq_status(sp, sp->lno, MSTAT_SHOWLAST);
  77         return (0);
  78 }