xref: /netbsd-src/external/bsd/nvi/dist/ex/ex_source.c (revision 2f698edb5c1cb2dcd9e762b0abb50c41dde8b6b7)
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
16 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 ";
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  */
43 int
ex_source(SCR * sp,EXCMD * cmdp)44 ex_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);
88 err:		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