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 */
33 int
ex_source(SCR * sp,EXCMD * cmdp)34 ex_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);
78 err: 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