dist/nvi/ex/ex_source.c

   1 /*      $NetBSD: ex_source.c,v 1.1.1.2 2008/05/18 14:31:18 aymeric Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 static const char sccsid[] = "Id: ex_source.c,v 10.16 2001/08/18 21:49:58 skimo Exp (Berkeley) Date: 2001/08/18 21:49:58";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20 #include <sys/stat.h>
  21
  22 #include <bitstring.h>
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <limits.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 #include "../common/common.h"
  32
  33 /*
  34  * ex_source -- :source file
  35  *      Execute ex commands from a file.
  36  *
  37  * PUBLIC: int ex_source __P((SCR *, EXCMD *));
  38  */
  39 int
  40 ex_source(SCR *sp, EXCMD *cmdp)
  41 {
  42         struct stat sb;
  43         int fd, len;
  44         char *bp;
  45         const char *name;
  46         size_t nlen;
  47         const CHAR_T *wp;
  48         CHAR_T *dp;
  49         size_t wlen;
  50
  51         INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
  52         if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb))
  53                 goto err;
  54
  55         /*
  56          * XXX
  57          * I'd like to test to see if the file is too large to malloc.  Since
  58          * we don't know what size or type off_t's or size_t's are, what the
  59          * largest unsigned integral type is, or what random insanity the local
  60          * C compiler will perpetrate, doing the comparison in a portable way
  61          * is flatly impossible.  So, put an fairly unreasonable limit on it,
  62          * I don't want to be dropping core here.
  63          */
  64 #define MEGABYTE        1048576
  65         if (sb.st_size > MEGABYTE) {
  66                 errno = ENOMEM;
  67                 goto err;
  68         }
  69
  70         MALLOC(sp, bp, char *, (size_t)sb.st_size + 1);
  71         if (bp == NULL) {
  72                 (void)close(fd);
  73                 return (1);
  74         }
  75         bp[sb.st_size] = '\0';
  76
  77         /* Read the file into memory. */
  78         len = read(fd, bp, (int)sb.st_size);
  79         (void)close(fd);
  80         if (len == -1 || len != sb.st_size) {
  81                 if (len != sb.st_size)
  82                         errno = EIO;
  83                 free(bp);
  84 err:            msgq_str(sp, M_SYSERR, name, "%s");
  85                 return (1);
  86         }
  87
  88         if (CHAR2INT(sp, bp, (size_t)sb.st_size + 1, wp, wlen))
  89                 msgq(sp, M_ERR, "323|Invalid input. Truncated.");
  90         dp = v_wstrdup(sp, wp, wlen - 1);
  91         free(bp);
  92         /* Put it on the ex queue. */
  93         INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
  94         return (ex_run_str(sp, name, dp, wlen - 1, 1, 1));
  95 }