GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/pw_dup.c Lines: 0 18 0.0 %
Date: 2017-11-07 Branches: 0 26 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: pw_dup.c,v 1.8 2015/09/13 15:33:48 guenther Exp $	*/
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/*
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 * Copyright (c) 2000, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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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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 * Sponsored in part by the Defense Advanced Research Projects
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 * Agency (DARPA) and Air Force Research Laboratory, Air Force
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 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
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 */
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#include <sys/types.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#define PW_SIZE(name, size)				\
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do {							\
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	if (pw->name) {					\
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		size = strlen(pw->name) + 1;		\
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		total += size;				\
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	}						\
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} while (0)
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#define PW_COPY(name, size)				\
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do {							\
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	if (pw->name) {					\
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		(void)memcpy(cp, pw->name, size);	\
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		newpw->name = cp;			\
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		cp += size;				\
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	}						\
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} while (0)
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struct passwd *
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pw_dup(const struct passwd *pw)
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{
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	char		*cp;
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	size_t		 nsize, psize, csize, gsize, dsize, ssize, total;
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	struct passwd	*newpw;
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	/* Allocate in one big chunk for easy freeing */
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	total = sizeof(struct passwd);
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	PW_SIZE(pw_name, nsize);
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	PW_SIZE(pw_passwd, psize);
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	PW_SIZE(pw_class, csize);
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	PW_SIZE(pw_gecos, gsize);
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	PW_SIZE(pw_dir, dsize);
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	PW_SIZE(pw_shell, ssize);
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	if ((cp = malloc(total)) == NULL)
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		return (NULL);
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	newpw = (struct passwd *)cp;
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	/*
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	 * Copy in passwd contents and make strings relative to space
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	 * at the end of the buffer.
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	 */
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	(void)memcpy(newpw, pw, sizeof(struct passwd));
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	cp += sizeof(struct passwd);
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	PW_COPY(pw_name, nsize);
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	PW_COPY(pw_passwd, psize);
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	PW_COPY(pw_class, csize);
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	PW_COPY(pw_gecos, gsize);
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	PW_COPY(pw_dir, dsize);
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	PW_COPY(pw_shell, ssize);
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	return (newpw);
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}
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DEF_WEAK(pw_dup);