1 /* $OpenBSD: ex_source.c,v 1.10 2015/12/07 20:39:19 mmcc 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_sourcefd -- :source already opened file 31 * Execute ex commands from the given file descriptor 32 * 33 * PUBLIC: int ex_sourcefd(SCR *, EXCMD *, int); 34 */ 35 int 36 ex_sourcefd(SCR *sp, EXCMD *cmdp, int fd) 37 { 38 struct stat sb; 39 int len; 40 char *bp, *name; 41 42 name = cmdp->argv[0]->bp; 43 if (fstat(fd, &sb)) 44 goto err; 45 46 /* 47 * XXX 48 * I'd like to test to see if the file is too large to malloc. Since 49 * we don't know what size or type off_t's or size_t's are, what the 50 * largest unsigned integral type is, or what random insanity the local 51 * C compiler will perpetrate, doing the comparison in a portable way 52 * is flatly impossible. So, put an fairly unreasonable limit on it, 53 * I don't want to be dropping core here. 54 */ 55 #define MEGABYTE 1048576 56 if (sb.st_size > MEGABYTE) { 57 errno = ENOMEM; 58 goto err; 59 } 60 61 MALLOC(sp, bp, (size_t)sb.st_size + 1); 62 if (bp == NULL) { 63 (void)close(fd); 64 return (1); 65 } 66 bp[sb.st_size] = '\0'; 67 68 /* Read the file into memory. */ 69 len = read(fd, bp, (int)sb.st_size); 70 (void)close(fd); 71 if (len == -1 || len != sb.st_size) { 72 if (len != sb.st_size) 73 errno = EIO; 74 free(bp); 75 err: msgq_str(sp, M_SYSERR, name, "%s"); 76 return (1); 77 } 78 79 /* Put it on the ex queue. */ 80 return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1)); 81 } 82 83 /* 84 * ex_source -- :source file 85 * Execute ex commands from a file. 86 * 87 * PUBLIC: int ex_source(SCR *, EXCMD *); 88 */ 89 int 90 ex_source(SCR *sp, EXCMD *cmdp) 91 { 92 char *name; 93 int fd; 94 95 name = cmdp->argv[0]->bp; 96 if ((fd = open(name, O_RDONLY, 0)) >= 0) 97 return (ex_sourcefd(sp, cmdp, fd)); 98 99 msgq_str(sp, M_SYSERR, name, "%s"); 100 return (1); 101 } 102