GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/bc/../dc/dc.c Lines: 22 54 40.7 %
Date: 2017-11-13 Branches: 9 30 30.0 %

Line Branch Exec Source
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/*	$OpenBSD: dc.c,v 1.18 2016/07/17 17:30:47 otto Exp $	*/
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/*
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 * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.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 "extern.h"
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static __dead void	usage(void);
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extern char		*__progname;
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static __dead void
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usage(void)
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{
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	(void)fprintf(stderr, "usage: %s [-x] [-e expression] [file]\n",
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	    __progname);
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	exit(1);
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}
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int
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dc_main(int argc, char *argv[])
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{
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	int		ch;
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	bool		extended_regs = false;
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	FILE		*file;
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	struct source	src;
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	char		*buf, *p;
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	struct stat	st;
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	if ((buf = strdup("")) == NULL)
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		err(1, NULL);
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	/* accept and ignore a single dash to be 4.4BSD dc(1) compatible */
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	optind = 1;
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	optreset = 1;
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	while ((ch = getopt(argc, argv, "e:x-")) != -1) {
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4152
		switch (ch) {
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		case 'e':
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			p = buf;
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			if (asprintf(&buf, "%s %s", buf, optarg) == -1)
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				err(1, NULL);
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			free(p);
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			break;
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		case 'x':
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			extended_regs = true;
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			break;
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		case '-':
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			break;
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		default:
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			usage();
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	init_bmachine(extended_regs);
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	(void)setvbuf(stdout, NULL, _IOLBF, 0);
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	(void)setvbuf(stderr, NULL, _IOLBF, 0);
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	if (argc > 1)
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		usage();
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	if (buf[0] != '\0') {
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		src_setstring(&src, buf);
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		reset_bmachine(&src);
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		eval();
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		free(buf);
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		if (argc == 0)
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			return (0);
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	}
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	if (argc == 1) {
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		file = fopen(argv[0], "r");
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		if (file == NULL)
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			err(1, "cannot open file %s", argv[0]);
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		if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
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			err(1, "pledge");
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		if (fstat(fileno(file), &st) == -1)
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			err(1, "%s", argv[0]);
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		if (S_ISDIR(st.st_mode))
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			errc(1, EISDIR, "%s", argv[0]);
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		src_setstream(&src, file);
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		reset_bmachine(&src);
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		eval();
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		(void)fclose(file);
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		/*
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		 * BSD and Solaris dc(1) continue with stdin after processing
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		 * the file given as the argument. We follow GNU dc(1).
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		 */
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		 return (0);
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	}
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	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	src_setstream(&src, stdin);
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	reset_bmachine(&src);
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	eval();
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	return (0);
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}