1 /* $OpenBSD: ex_source.c,v 1.6 2002/02/16 21:27:57 millert Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1992, 1993, 1994, 1995, 1996 7 * Keith Bostic. All rights reserved. 8 * 9 * See the LICENSE file for redistribution information. 10 */ 11 12 #include "config.h" 13 14 #ifndef lint 15 static const char sccsid[] = "@(#)ex_source.c 10.12 (Berkeley) 8/10/96"; 16 #endif /* not lint */ 17 18 #include <sys/types.h> 19 #include <sys/queue.h> 20 #include <sys/stat.h> 21 22 #include <bitstring.h> 23 #include <errno.h> 24 #include <fcntl.h> 25 #include <limits.h> 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <unistd.h> 30 31 #include "../common/common.h" 32 33 /* 34 * ex_source -- :source file 35 * Execute ex commands from a file. 36 * 37 * PUBLIC: int ex_source(SCR *, EXCMD *); 38 */ 39 int 40 ex_source(sp, cmdp) 41 SCR *sp; 42 EXCMD *cmdp; 43 { 44 struct stat sb; 45 int fd, len; 46 char *bp, *name; 47 48 name = cmdp->argv[0]->bp; 49 if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb)) 50 goto err; 51 52 /* 53 * XXX 54 * I'd like to test to see if the file is too large to malloc. Since 55 * we don't know what size or type off_t's or size_t's are, what the 56 * largest unsigned integral type is, or what random insanity the local 57 * C compiler will perpetrate, doing the comparison in a portable way 58 * is flatly impossible. So, put an fairly unreasonable limit on it, 59 * I don't want to be dropping core here. 60 */ 61 #define MEGABYTE 1048576 62 if (sb.st_size > MEGABYTE) { 63 errno = ENOMEM; 64 goto err; 65 } 66 67 MALLOC(sp, bp, char *, (size_t)sb.st_size + 1); 68 if (bp == NULL) { 69 (void)close(fd); 70 return (1); 71 } 72 bp[sb.st_size] = '\0'; 73 74 /* Read the file into memory. */ 75 len = read(fd, bp, (int)sb.st_size); 76 (void)close(fd); 77 if (len == -1 || len != sb.st_size) { 78 if (len != sb.st_size) 79 errno = EIO; 80 free(bp); 81 err: msgq_str(sp, M_SYSERR, name, "%s"); 82 return (1); 83 } 84 85 /* Put it on the ex queue. */ 86 return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1)); 87 } 88