1 /* $NetBSD: ex_source.c,v 1.2 2013/11/22 15:52:05 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 #ifndef lint 14 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 "; 15 #endif /* not lint */ 16 17 #include <sys/types.h> 18 #include <sys/queue.h> 19 #include <sys/stat.h> 20 21 #include <bitstring.h> 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <limits.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include <unistd.h> 29 30 #include "../common/common.h" 31 32 /* 33 * ex_source -- :source file 34 * Execute ex commands from a file. 35 * 36 * PUBLIC: int ex_source __P((SCR *, EXCMD *)); 37 */ 38 int 39 ex_source(SCR *sp, EXCMD *cmdp) 40 { 41 struct stat sb; 42 int fd, len; 43 char *bp; 44 const char *name; 45 size_t nlen; 46 const CHAR_T *wp; 47 CHAR_T *dp; 48 size_t wlen; 49 50 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen); 51 if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb)) 52 goto err; 53 54 /* 55 * XXX 56 * I'd like to test to see if the file is too large to malloc. Since 57 * we don't know what size or type off_t's or size_t's are, what the 58 * largest unsigned integral type is, or what random insanity the local 59 * C compiler will perpetrate, doing the comparison in a portable way 60 * is flatly impossible. So, put an fairly unreasonable limit on it, 61 * I don't want to be dropping core here. 62 */ 63 #define MEGABYTE 1048576 64 if (sb.st_size > MEGABYTE) { 65 errno = ENOMEM; 66 goto err; 67 } 68 69 MALLOC(sp, bp, char *, (size_t)sb.st_size + 1); 70 if (bp == NULL) { 71 (void)close(fd); 72 return (1); 73 } 74 bp[sb.st_size] = '\0'; 75 76 /* Read the file into memory. */ 77 len = read(fd, bp, (int)sb.st_size); 78 (void)close(fd); 79 if (len == -1 || len != sb.st_size) { 80 if (len != sb.st_size) 81 errno = EIO; 82 free(bp); 83 err: msgq_str(sp, M_SYSERR, name, "%s"); 84 return (1); 85 } 86 87 if (CHAR2INT(sp, bp, (size_t)sb.st_size + 1, wp, wlen)) 88 msgq(sp, M_ERR, "323|Invalid input. Truncated."); 89 dp = v_wstrdup(sp, wp, wlen - 1); 90 free(bp); 91 /* Put it on the ex queue. */ 92 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen); 93 return (ex_run_str(sp, name, dp, wlen - 1, 1, 1)); 94 } 95