119304Speter/*- 219304Speter * Copyright (c) 1992, 1993, 1994 319304Speter * The Regents of the University of California. All rights reserved. 419304Speter * Copyright (c) 1992, 1993, 1994, 1995, 1996 519304Speter * Keith Bostic. All rights reserved. 619304Speter * 719304Speter * See the LICENSE file for redistribution information. 819304Speter */ 919304Speter 1019304Speter#include "config.h" 1119304Speter 1219304Speter#ifndef lint 1319304Speterstatic const char sccsid[] = "@(#)ex_source.c 10.12 (Berkeley) 8/10/96"; 1419304Speter#endif /* not lint */ 1519304Speter 1619304Speter#include <sys/types.h> 1719304Speter#include <sys/queue.h> 1819304Speter#include <sys/stat.h> 1919304Speter 2019304Speter#include <bitstring.h> 2119304Speter#include <errno.h> 2219304Speter#include <fcntl.h> 2319304Speter#include <limits.h> 2419304Speter#include <stdio.h> 2519304Speter#include <stdlib.h> 2619304Speter#include <string.h> 2719304Speter#include <unistd.h> 2819304Speter 2919304Speter#include "../common/common.h" 3019304Speter 3119304Speter/* 3219304Speter * ex_source -- :source file 3319304Speter * Execute ex commands from a file. 3419304Speter * 3519304Speter * PUBLIC: int ex_source __P((SCR *, EXCMD *)); 3619304Speter */ 3719304Speterint 3819304Speterex_source(sp, cmdp) 3919304Speter SCR *sp; 4019304Speter EXCMD *cmdp; 4119304Speter{ 4219304Speter struct stat sb; 4319304Speter int fd, len; 4419304Speter char *bp, *name; 4519304Speter 4619304Speter name = cmdp->argv[0]->bp; 4719304Speter if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb)) 4819304Speter goto err; 4919304Speter 5019304Speter /* 5119304Speter * XXX 5219304Speter * I'd like to test to see if the file is too large to malloc. Since 5319304Speter * we don't know what size or type off_t's or size_t's are, what the 5419304Speter * largest unsigned integral type is, or what random insanity the local 5519304Speter * C compiler will perpetrate, doing the comparison in a portable way 5619304Speter * is flatly impossible. So, put an fairly unreasonable limit on it, 5719304Speter * I don't want to be dropping core here. 5819304Speter */ 5919304Speter#define MEGABYTE 1048576 6019304Speter if (sb.st_size > MEGABYTE) { 6119304Speter errno = ENOMEM; 6219304Speter goto err; 6319304Speter } 6419304Speter 6519304Speter MALLOC(sp, bp, char *, (size_t)sb.st_size + 1); 6619304Speter if (bp == NULL) { 6719304Speter (void)close(fd); 6819304Speter return (1); 6919304Speter } 7019304Speter bp[sb.st_size] = '\0'; 7119304Speter 7219304Speter /* Read the file into memory. */ 7319304Speter len = read(fd, bp, (int)sb.st_size); 7419304Speter (void)close(fd); 7519304Speter if (len == -1 || len != sb.st_size) { 7619304Speter if (len != sb.st_size) 7719304Speter errno = EIO; 7819304Speter free(bp); 7919304Spetererr: msgq_str(sp, M_SYSERR, name, "%s"); 8019304Speter return (1); 8119304Speter } 8219304Speter 8319304Speter /* Put it on the ex queue. */ 8419304Speter return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1)); 8519304Speter} 86