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/stat.h>
15
16#include <bitstring.h>
17#include <errno.h>
18#include <fcntl.h>
19#include <limits.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <unistd.h>
24
25#include "../common/common.h"
26
27/*
28 * ex_source -- :source file
29 *	Execute ex commands from a file.
30 *
31 * PUBLIC: int ex_source(SCR *, EXCMD *);
32 */
33int
34ex_source(SCR *sp, EXCMD *cmdp)
35{
36	struct stat sb;
37	int fd, len;
38	char *bp;
39	char *name, *np;
40	size_t nlen;
41	CHAR_T *wp;
42	size_t wlen;
43	int rc;
44
45	INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
46	if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb))
47		goto err;
48
49	/*
50	 * XXX
51	 * I'd like to test to see if the file is too large to malloc.  Since
52	 * we don't know what size or type off_t's or size_t's are, what the
53	 * largest unsigned integral type is, or what random insanity the local
54	 * C compiler will perpetrate, doing the comparison in a portable way
55	 * is flatly impossible.  So, put an fairly unreasonable limit on it,
56	 * I don't want to be dropping core here.
57	 */
58#define	MEGABYTE	1048576
59	if (sb.st_size > MEGABYTE) {
60		errno = ENOMEM;
61		goto err;
62	}
63
64	MALLOC(sp, bp, (size_t)sb.st_size + 1);
65	if (bp == NULL) {
66		(void)close(fd);
67		return (1);
68	}
69	bp[sb.st_size] = '\0';
70
71	/* Read the file into memory. */
72	len = read(fd, bp, (int)sb.st_size);
73	(void)close(fd);
74	if (len == -1 || len != sb.st_size) {
75		if (len != sb.st_size)
76			errno = EIO;
77		free(bp);
78err:		msgq_str(sp, M_SYSERR, name, "%s");
79		return (1);
80	}
81
82	np = strdup(name);
83	if (CHAR2INT(sp, bp, (size_t)sb.st_size + 1, wp, wlen))
84		msgq(sp, M_ERR, "323|Invalid input. Truncated.");
85	/* Put it on the ex queue. */
86	rc = ex_run_str(sp, np, wp, wlen - 1, 1, 0);
87	free(np);
88	free(bp);
89	return (rc);
90}
91