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