lib/bsdutil: add library for common utility functions

5 files changed, 565 insertions, 0 deletions

diff --git a/lib/bsdutil/bsdutil.gpr b/lib/bsdutil/bsdutil.gpr
new file mode 100644
index 0000000..bf60c4a
--- /dev/null
+++ b/lib/bsdutil/bsdutil.gpr
@@ -0,0 +1,19 @@
+library project bsdutil extends "template/base.gpr" is
+  
+  BuildRoot  := External ("BUILDROOT");
+  IncludeDir := External ("PROJ_INCLUDE");
+  HeaderFile := project'Name & ".h";
+  
+  for Library_Name use "bsdutil";
+  for Object_Dir use BuildRoot & "/" & project'Name;
+  for Library_Dir use BuildRoot & "/lib";
+  for Library_Standalone use "no";
+  for Library_Kind use "dynamic";
+  for Library_Version use "libbsdutil.so.1";
+  for Symbolic_Link_Supported use "true";
+  for Library_Partial_Linker use ("");
+
+  for Source_Dirs use ("./**", IncludeDir);
+  for Interfaces use (HeaderFile);
+
+end bsdutil;
diff --git a/lib/bsdutil/close_fd.h b/lib/bsdutil/close_fd.h
new file mode 100644
index 0000000..68ba6c9
--- /dev/null
+++ b/lib/bsdutil/close_fd.h
@@ -0,0 +1,54 @@
+#ifndef _PATH_DEV
+/*
+ * The tailing '/' in _PATH_DEV is there for compatibility with libc.
+ */
+# define _PATH_DEV"/dev/"
+#endif
+
+////////////////////////////////////////////////
+/// Cargo culted from util-linux include/c.h ///
+////////////////////////////////////////////////
+#include <err.h>
+
+/*
+ * Force a compilation error if condition is true, but also produce a
+ * result (of value 0 and type size_t), so the expression can be used
+ * e.g. in a structure initializer (or wherever else comma expressions
+ * aren't permitted).
+ */
+#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); }))
+#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
+
+#ifdef __GNUC__
+/* &a[0] degrades to a pointer: a different type from an array */
+# define __must_be_array(a) \
+	UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
+
+# define ignore_result(x) __extension__ ({ \
+	__typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
+		})
+#else /* !__GNUC__ */
+# define __must_be_array(a)     0
+# define __attribute__(_arg_)
+# define ignore_result(x) ((void) (x))
+#endif /* !__GNUC__ */
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
+#endif
+
+//////////////////////////////////////////////////////////
+/// Cargo culted from util-linux include/closestream.h ///
+//////////////////////////////////////////////////////////
+static inline int
+close_fd(int fd)
+{
+	const int fsync_fail = (fsync(fd) != 0);
+	const int close_fail = (close(fd) != 0);
+
+	if (fsync_fail || close_fail)
+		return EOF;
+	return 0;
+}
+
+
diff --git a/lib/bsdutil/efun.c b/lib/bsdutil/efun.c
new file mode 100644
index 0000000..cf46124
--- /dev/null
+++ b/lib/bsdutil/efun.c
@@ -0,0 +1,150 @@
+/*	$NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil Exp $	*/
+
+/*-
+ * Copyright (c) 2006 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <bsd/err.h>
+#include <errno.h>
+#include <bsd/inttypes.h>
+#include <bsd/string.h>
+#include <bsd/stdlib.h>
+#include <bsd/stdio.h>
+#include <stdarg.h>
+#include <bsdutil.h>
+
+static void (*efunc)(int, const char *, ...) = err;
+
+void (*
+esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
+{
+	void (*of)(int, const char *, ...) = efunc;
+	efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef;
+	return of;
+}
+
+size_t
+estrlcpy(char *dst, const char *src, size_t len)
+{
+	size_t rv;
+	if ((rv = strlcpy(dst, src, len)) >= len) {
+		errno = ENAMETOOLONG;
+		(*efunc)(1,
+		    "Cannot copy string; %zu chars needed %zu provided",
+		    rv, len);
+	}
+	return rv;
+}
+
+size_t
+estrlcat(char *dst, const char *src, size_t len)
+{
+	size_t rv;
+	if ((rv = strlcat(dst, src, len)) >= len) {
+		errno = ENAMETOOLONG;
+		(*efunc)(1,
+		    "Cannot append to string; %zu chars needed %zu provided",
+		    rv, len);
+	}
+	return rv;
+}
+
+char *
+estrdup(const char *s)
+{
+	char *d = strdup(s);
+	if (d == NULL)
+		(*efunc)(1, "Cannot copy string");
+	return d;
+}
+
+char *
+estrndup(const char *s, size_t len)
+{
+	char *d = strndup(s, len);
+	if (d == NULL)
+		(*efunc)(1, "Cannot copy string");
+	return d;
+}
+
+void *
+emalloc(size_t n)
+{
+	void *p = malloc(n);
+	if (p == NULL && n != 0)
+		(*efunc)(1, "Cannot allocate %zu bytes", n);
+	return p;
+}
+
+void *
+ecalloc(size_t n, size_t s)
+{
+	void *p = calloc(n, s);
+	if (p == NULL && n != 0 && s != 0)
+		(*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s);
+	return p;
+}
+
+void *
+erealloc(void *p, size_t n)
+{
+	void *q = realloc(p, n);
+	if (q == NULL && n != 0)
+		(*efunc)(1, "Cannot re-allocate %zu bytes", n);
+	return q;
+}
+
+FILE *
+efopen(const char *p, const char *m)
+{
+	FILE *fp = fopen(p, m);
+	if (fp == NULL)
+		(*efunc)(1, "Cannot open `%s'", p);
+	return fp;
+}
+
+int
+easprintf(char ** __restrict ret, const char * __restrict format, ...)
+{
+	int rv;
+	va_list ap;
+	va_start(ap, format);
+	if ((rv = vasprintf(ret, format, ap)) == -1)
+		(*efunc)(1, "Cannot format string");
+	va_end(ap);
+	return rv;
+}
+
+int
+evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
+{
+	int rv;
+	if ((rv = vasprintf(ret, format, ap)) == -1)
+		(*efunc)(1, "Cannot format string");
+	return rv;
+}
diff --git a/lib/bsdutil/nls.h b/lib/bsdutil/nls.h
new file mode 100644
index 0000000..5566908
--- /dev/null
+++ b/lib/bsdutil/nls.h
@@ -0,0 +1,153 @@
+#ifndef UTIL_LINUX_NLS_H
+#define UTIL_LINUX_NLS_H
+
+#ifndef LOCALEDIR
+#define LOCALEDIR "/usr/share/locale"
+#endif
+
+#ifdef HAVE_LOCALE_H
+# include <locale.h>
+#else
+# undef setlocale
+# define setlocale(Category, Locale) /* empty */
+struct lconv
+{
+	char *decimal_point;
+};
+# undef localeconv
+# define localeconv() NULL
+#endif
+
+
+#ifdef ENABLE_NLS
+# include <libintl.h>
+/*
+ * For NLS support in the public shared libraries we have to specify text
+ * domain name to be independent on the main program. For this purpose define
+ * UL_TEXTDOMAIN_EXPLICIT before you include nls.h to your shared library code.
+ */
+# ifdef UL_TEXTDOMAIN_EXPLICIT
+#  define _(Text) dgettext (UL_TEXTDOMAIN_EXPLICIT, Text)
+# else
+#  define _(Text) gettext (Text)
+# endif
+# ifdef gettext_noop
+#  define N_(String) gettext_noop (String)
+# else
+#  define N_(String) (String)
+# endif
+# define P_(Singular, Plural, n) ngettext (Singular, Plural, n)
+#else
+# undef bindtextdomain
+# define bindtextdomain(Domain, Directory) /* empty */
+# undef textdomain
+# define textdomain(Domain) /* empty */
+# define _(Text) (Text)
+# define N_(Text) (Text)
+# define P_(Singular, Plural, n) ((n) == 1 ? (Singular) : (Plural))
+#endif /* ENABLE_NLS */
+
+#ifdef HAVE_LANGINFO_H
+# include <langinfo.h>
+#else
+
+typedef int nl_item;
+extern char *langinfo_fallback(nl_item item);
+
+# define nl_langinfo	langinfo_fallback
+
+enum {
+	CODESET = 1,
+	RADIXCHAR,
+	THOUSEP,
+	D_T_FMT,
+	D_FMT,
+	T_FMT,
+	T_FMT_AMPM,
+	AM_STR,
+	PM_STR,
+
+	DAY_1,
+	DAY_2,
+	DAY_3,
+	DAY_4,
+	DAY_5,
+	DAY_6,
+	DAY_7,
+
+	ABDAY_1,
+	ABDAY_2,
+	ABDAY_3,
+	ABDAY_4,
+	ABDAY_5,
+	ABDAY_6,
+	ABDAY_7,
+
+	MON_1,
+	MON_2,
+	MON_3,
+	MON_4,
+	MON_5,
+	MON_6,
+	MON_7,
+	MON_8,
+	MON_9,
+	MON_10,
+	MON_11,
+	MON_12,
+
+	ABMON_1,
+	ABMON_2,
+	ABMON_3,
+	ABMON_4,
+	ABMON_5,
+	ABMON_6,
+	ABMON_7,
+	ABMON_8,
+	ABMON_9,
+	ABMON_10,
+	ABMON_11,
+	ABMON_12,
+
+	ERA_D_FMT,
+	ERA_D_T_FMT,
+	ERA_T_FMT,
+	ALT_DIGITS,
+	CRNCYSTR,
+	YESEXPR,
+	NOEXPR
+};
+
+#endif /* !HAVE_LANGINFO_H */
+
+#ifndef HAVE_LANGINFO_ALTMON
+# define ALTMON_1 MON_1
+# define ALTMON_2 MON_2
+# define ALTMON_3 MON_3
+# define ALTMON_4 MON_4
+# define ALTMON_5 MON_5
+# define ALTMON_6 MON_6
+# define ALTMON_7 MON_7
+# define ALTMON_8 MON_8
+# define ALTMON_9 MON_9
+# define ALTMON_10 MON_10
+# define ALTMON_11 MON_11
+# define ALTMON_12 MON_12
+#endif /* !HAVE_LANGINFO_ALTMON */
+
+#ifndef HAVE_LANGINFO_NL_ABALTMON
+# define _NL_ABALTMON_1 ABMON_1
+# define _NL_ABALTMON_2 ABMON_2
+# define _NL_ABALTMON_3 ABMON_3
+# define _NL_ABALTMON_4 ABMON_4
+# define _NL_ABALTMON_5 ABMON_5
+# define _NL_ABALTMON_6 ABMON_6
+# define _NL_ABALTMON_7 ABMON_7
+# define _NL_ABALTMON_8 ABMON_8
+# define _NL_ABALTMON_9 ABMON_9
+# define _NL_ABALTMON_10 ABMON_10
+# define _NL_ABALTMON_11 ABMON_11
+# define _NL_ABALTMON_12 ABMON_12
+#endif /* !HAVE_LANGINFO_NL_ABALTMON */
+
+#endif /* UTIL_LINUX_NLS_H */
diff --git a/lib/bsdutil/ttymsg.c b/lib/bsdutil/ttymsg.c
new file mode 100644
index 0000000..9afa7ea
--- /dev/null
+++ b/lib/bsdutil/ttymsg.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Modified Sun Mar 12 10:39:22 1995, faith@cs.unc.edu for Linux
+ *
+ */
+
+ /* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+  * - added Native Language Support
+  * Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+  * - fixed strerr(errno) in gettext calls
+  */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/uio.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <errno.h>
+#include <paths.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <bsdutil.h>
+#include "nls.h"
+#include "close_fd.h"
+
+#define ERR_BUFLEN	(MAXNAMLEN + 1024)
+
+/*
+ * Display the contents of a uio structure on a terminal.  Used by wall(1),
+ * syslogd(8), and talkd(8).  Forks and finishes in child if write would block,
+ * waiting up to tmout seconds.  Returns pointer to error string on unexpected
+ * error; string is not newline-terminated.  Various "normal" errors are
+ * ignored (exclusive-use, lack of permission, etc.).
+ */
+char *
+ttymsg(struct iovec *iov, size_t iovcnt, const char *line, int tmout) {
+	static char device[MAXNAMLEN];
+	static char errbuf[ERR_BUFLEN];
+	size_t cnt, left;
+	ssize_t wret;
+	struct iovec localiov[6];
+	int fd, forked = 0;
+	ssize_t	len = 0;
+
+	if (iovcnt > ARRAY_SIZE(localiov)) {
+		snprintf(errbuf, sizeof(errbuf), _("internal error: too many iov's"));
+		return errbuf;
+	}
+
+	/* The old code here rejected the line argument when it contained a '/',
+	   saying: "A slash may be an attempt to break security...".
+	   However, if a user can control the line argument here
+	   then he can make this routine write to /dev/hda or /dev/sda
+	   already. So, this test was worthless, and these days it is
+	   also wrong since people use /dev/pts/xxx. */
+
+	len = snprintf(device, sizeof(device), "%s%s", _PATH_DEV, line);
+	if (len < 0 || (size_t)len >= sizeof(device)) {
+		snprintf(errbuf, sizeof(errbuf), _("excessively long line arg"));
+		return errbuf;
+	}
+
+	/*
+	 * open will fail on slip lines or exclusive-use lines
+	 * if not running as root; not an error.
+	 */
+	if ((fd = open(device, O_WRONLY|O_NONBLOCK, 0)) < 0) {
+		if (errno == EBUSY || errno == EACCES)
+			return NULL;
+
+		len = snprintf(errbuf, sizeof(errbuf), "%s: %m", device);
+		if (len < 0 || (size_t)len >= sizeof(errbuf))
+			snprintf(errbuf, sizeof(errbuf), _("open failed"));
+		return errbuf;
+	}
+
+	for (cnt = left = 0; cnt < iovcnt; ++cnt)
+		left += iov[cnt].iov_len;
+
+	for (;;) {
+		wret = writev(fd, iov, iovcnt);
+		if (wret >= (ssize_t) left)
+			break;
+		if (wret >= 0) {
+			left -= wret;
+			if (iov != localiov) {
+				memmove(localiov, iov,
+				    iovcnt * sizeof(struct iovec));
+				iov = localiov;
+			}
+			for (cnt = 0; wret >= (ssize_t) iov->iov_len; ++cnt) {
+				wret -= iov->iov_len;
+				++iov;
+				--iovcnt;
+			}
+			if (wret) {
+				iov->iov_base = (char *) iov->iov_base + wret;
+				iov->iov_len -= wret;
+			}
+			continue;
+		}
+		if (errno == EWOULDBLOCK) {
+			int cpid, flags;
+			sigset_t sigmask;
+
+			if (forked) {
+				close(fd);
+				_exit(EXIT_FAILURE);
+			}
+			cpid = fork();
+			if (cpid < 0) {
+				len = snprintf(errbuf, sizeof(errbuf), _("fork: %m"));
+				if (len < 0 || (size_t)len >= sizeof(errbuf))
+					snprintf(errbuf, sizeof(errbuf), _("cannot fork"));
+				close(fd);
+				return errbuf;
+			}
+			if (cpid) {	/* parent */
+				close(fd);
+				return NULL;
+			}
+			forked++;
+			/* wait at most tmout seconds */
+			signal(SIGALRM, SIG_DFL);
+			signal(SIGTERM, SIG_DFL); /* XXX */
+			sigemptyset(&sigmask);
+			sigprocmask (SIG_SETMASK, &sigmask, NULL);
+			alarm((u_int)tmout);
+			flags = fcntl(fd, F_GETFL);
+			fcntl(flags, F_SETFL, (long) (flags & ~O_NONBLOCK));
+			continue;
+		}
+		/*
+		 * We get ENODEV on a slip line if we're running as root,
+		 * and EIO if the line just went away.
+		 */
+		if (errno == ENODEV || errno == EIO)
+			break;
+		if (close_fd(fd) != 0)
+			warn(_("write failed: %s"), device);
+		if (forked)
+			_exit(EXIT_FAILURE);
+
+		len = snprintf(errbuf, sizeof(errbuf), "%s: %m", device);
+		if (len < 0 || (size_t)len >= sizeof(errbuf))
+			snprintf(errbuf, sizeof(errbuf),
+					_("%s: BAD ERROR, message is "
+					  "far too long"), device);
+		return errbuf;
+	}
+
+	if (forked)
+		_exit(EXIT_SUCCESS);
+	return NULL;
+}