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/* $OpenBSD: ex_source.c,v 1.10 2015/12/07 20:39:19 mmcc Exp $ */ |
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/*- |
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* Copyright (c) 1992, 1993, 1994 |
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* The Regents of the University of California. All rights reserved. |
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* Copyright (c) 1992, 1993, 1994, 1995, 1996 |
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* Keith Bostic. All rights reserved. |
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* |
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* See the LICENSE file for redistribution information. |
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*/ |
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#include "config.h" |
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#include <sys/types.h> |
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#include <sys/queue.h> |
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#include <sys/stat.h> |
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#include <bitstring.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <limits.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "../common/common.h" |
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/* |
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* ex_sourcefd -- :source already opened file |
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* Execute ex commands from the given file descriptor |
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* |
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* PUBLIC: int ex_sourcefd(SCR *, EXCMD *, int); |
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*/ |
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int |
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ex_sourcefd(SCR *sp, EXCMD *cmdp, int fd) |
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{ |
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struct stat sb; |
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int len; |
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char *bp, *name; |
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name = cmdp->argv[0]->bp; |
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if (fstat(fd, &sb)) |
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goto err; |
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/* |
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* XXX |
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* I'd like to test to see if the file is too large to malloc. Since |
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* we don't know what size or type off_t's or size_t's are, what the |
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* largest unsigned integral type is, or what random insanity the local |
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* C compiler will perpetrate, doing the comparison in a portable way |
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* is flatly impossible. So, put an fairly unreasonable limit on it, |
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* I don't want to be dropping core here. |
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*/ |
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#define MEGABYTE 1048576 |
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if (sb.st_size > MEGABYTE) { |
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errno = ENOMEM; |
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goto err; |
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} |
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MALLOC(sp, bp, (size_t)sb.st_size + 1); |
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if (bp == NULL) { |
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(void)close(fd); |
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return (1); |
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} |
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bp[sb.st_size] = '\0'; |
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/* Read the file into memory. */ |
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len = read(fd, bp, (int)sb.st_size); |
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(void)close(fd); |
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if (len == -1 || len != sb.st_size) { |
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if (len != sb.st_size) |
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errno = EIO; |
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free(bp); |
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err: msgq_str(sp, M_SYSERR, name, "%s"); |
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return (1); |
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} |
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/* Put it on the ex queue. */ |
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return (ex_run_str(sp, name, bp, (size_t)sb.st_size, 1, 1)); |
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} |
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/* |
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* ex_source -- :source file |
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* Execute ex commands from a file. |
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* |
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* PUBLIC: int ex_source(SCR *, EXCMD *); |
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*/ |
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int |
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ex_source(SCR *sp, EXCMD *cmdp) |
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{ |
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char *name; |
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int fd; |
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name = cmdp->argv[0]->bp; |
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if ((fd = open(name, O_RDONLY, 0)) >= 0) |
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return (ex_sourcefd(sp, cmdp, fd)); |
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msgq_str(sp, M_SYSERR, name, "%s"); |
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return (1); |
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} |