1 /* $OpenBSD: ex_source.c,v 1.7 2009/10/27 23:59:47 deraadt 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 #include <sys/types.h> 15 #include <sys/queue.h> 16 #include <sys/stat.h> 17 18 #include <bitstring.h> 19 #include <errno.h> 20 #include <fcntl.h> 21 #include <limits.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <unistd.h> 26 27 #include "../common/common.h" 28 29 /* 30 * ex_source -- :source file 31 * Execute ex commands from a file. 32 * 33 * PUBLIC: int ex_source(SCR *, EXCMD *); 34 */ 35 int 36 ex_source(sp, cmdp) 37 SCR *sp; 38 EXCMD *cmdp; 39 { 40 struct stat sb; 41 int fd, len; 42 char *bp, *name; 43 44 name = cmdp->argv[0]->bp; 45 if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb)) 46 goto err; 47 48 /* 49 * XXX 50 * I'd like to test to see if the file is too large to malloc. Since 51 * we don't know what size or type off_t's or size_t's are, what the 52 * largest unsigned integral type is, or what random insanity the local 53 * C compiler will perpetrate, doing the comparison in a portable way 54 * is flatly impossible. So, put an fairly unreasonable limit on it, 55 * I don't want to be dropping core here. 56 */ 57 #define MEGABYTE 1048576 58 if (sb.st_size > MEGABYTE) { 59 errno = ENOMEM; 60 goto err; 61 } 62 63 MALLOC(sp, bp, char *, (size_t)sb.st_size + 1); 64 if (bp == NULL) { 65 (void)close(fd); 66 return (1); 67 } 68 bp[sb.st_size] = '\0'; 69 70 /* Read the file into memory. */ 71 len = read(fd, bp, (int)sb.st_size); 72 (void)close(fd); 73 if (len == -1 || len != sb.st_size) { 74 if (len != sb.st_size) 75 errno = EIO; 76 free(bp); 77 err: msgq_str(sp, M_SYSERR, name, "%s"); 78 return (1); 79 } 80 81 /* Put it on the ex queue. */ 82 return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1)); 83 } 84