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 #ifndef lint
13 static const char sccsid[] = "@(#)ex_source.c 10.12 (Berkeley) 8/10/96";
14 #endif /* not lint */
15
16 #include <sys/types.h>
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19
20 #include <bitstring.h>
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <limits.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <unistd.h>
28
29 #include "../common/common.h"
30
31 /*
32 * ex_source -- :source file
33 * Execute ex commands from a file.
34 *
35 * PUBLIC: int ex_source __P((SCR *, EXCMD *));
36 */
37 int
ex_source(sp,cmdp)38 ex_source(sp, cmdp)
39 SCR *sp;
40 EXCMD *cmdp;
41 {
42 struct stat sb;
43 int fd, len;
44 char *bp, *name;
45
46 name = cmdp->argv[0]->bp;
47 if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb))
48 goto err;
49
50 /*
51 * XXX
52 * I'd like to test to see if the file is too large to malloc. Since
53 * we don't know what size or type off_t's or size_t's are, what the
54 * largest unsigned integral type is, or what random insanity the local
55 * C compiler will perpetrate, doing the comparison in a portable way
56 * is flatly impossible. So, put an fairly unreasonable limit on it,
57 * I don't want to be dropping core here.
58 */
59 #define MEGABYTE 1048576
60 if (sb.st_size > MEGABYTE) {
61 errno = ENOMEM;
62 goto err;
63 }
64
65 MALLOC(sp, bp, char *, (size_t)sb.st_size + 1);
66 if (bp == NULL) {
67 (void)close(fd);
68 return (1);
69 }
70 bp[sb.st_size] = '\0';
71
72 /* Read the file into memory. */
73 len = read(fd, bp, (int)sb.st_size);
74 (void)close(fd);
75 if (len == -1 || len != sb.st_size) {
76 if (len != sb.st_size)
77 errno = EIO;
78 free(bp);
79 err: msgq_str(sp, M_SYSERR, name, "%s");
80 return (1);
81 }
82
83 /* Put it on the ex queue. */
84 return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1));
85 }
86