1/*	$NetBSD: ex_source.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
2/*-
3 * Copyright (c) 1992, 1993, 1994
4 *	The Regents of the University of California.  All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 *	Keith Bostic.  All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11#include "config.h"
12
13#include <sys/cdefs.h>
14#if 0
15#ifndef lint
16static 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 ";
17#endif /* not lint */
18#else
19__RCSID("$NetBSD: ex_source.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20#endif
21
22#include <sys/types.h>
23#include <sys/queue.h>
24#include <sys/stat.h>
25
26#include <bitstring.h>
27#include <errno.h>
28#include <fcntl.h>
29#include <limits.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <unistd.h>
34
35#include "../common/common.h"
36
37/*
38 * ex_source -- :source file
39 *	Execute ex commands from a file.
40 *
41 * PUBLIC: int ex_source __P((SCR *, EXCMD *));
42 */
43int
44ex_source(SCR *sp, EXCMD *cmdp)
45{
46	struct stat sb;
47	int fd, len;
48	char *bp;
49	const char *name;
50	size_t nlen;
51	const CHAR_T *wp;
52	CHAR_T *dp;
53	size_t wlen;
54
55	INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
56	if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb))
57		goto err;
58
59	/*
60	 * XXX
61	 * I'd like to test to see if the file is too large to malloc.  Since
62	 * we don't know what size or type off_t's or size_t's are, what the
63	 * largest unsigned integral type is, or what random insanity the local
64	 * C compiler will perpetrate, doing the comparison in a portable way
65	 * is flatly impossible.  So, put an fairly unreasonable limit on it,
66	 * I don't want to be dropping core here.
67	 */
68#define	MEGABYTE	1048576
69	if (sb.st_size > MEGABYTE) {
70		errno = ENOMEM;
71		goto err;
72	}
73
74	MALLOC(sp, bp, char *, (size_t)sb.st_size + 1);
75	if (bp == NULL) {
76		(void)close(fd);
77		return (1);
78	}
79	bp[sb.st_size] = '\0';
80
81	/* Read the file into memory. */
82	len = read(fd, bp, (int)sb.st_size);
83	(void)close(fd);
84	if (len == -1 || len != sb.st_size) {
85		if (len != sb.st_size)
86			errno = EIO;
87		free(bp);
88err:		msgq_str(sp, M_SYSERR, name, "%s");
89		return (1);
90	}
91
92	if (CHAR2INT(sp, bp, (size_t)sb.st_size + 1, wp, wlen))
93		msgq(sp, M_ERR, "323|Invalid input. Truncated.");
94	dp = v_wstrdup(sp, wp, wlen - 1);
95	free(bp);
96	/* Put it on the ex queue. */
97	INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
98	return (ex_run_str(sp, name, dp, wlen - 1, 1, 1));
99}
100