Add devel/libsetenv, a library that provides implementations of setenv(3)

and unsetenv(3) for platforms that lack them. This package is modeled after
devel/libgetopt and the intended use within pkgsrc is similar.

7 files changed, 290 insertions, 0 deletions

diff --git a/devel/libsetenv/DESCR b/devel/libsetenv/DESCR
new file mode 100644
index 00000000000..787b34caea0
--- /dev/null
+++ b/devel/libsetenv/DESCR
@@ -0,0 +1,2 @@
+libsetenv provides implementations of setenv(3) and unsetenv(3) for
+platforms that lack them.
diff --git a/devel/libsetenv/Makefile b/devel/libsetenv/Makefile
new file mode 100644
index 00000000000..420ecf46100
--- /dev/null
+++ b/devel/libsetenv/Makefile
@@ -0,0 +1,29 @@
+# $NetBSD: Makefile,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $
+#
+
+DISTNAME=	libsetenv-0.1
+CATEGORIES=	devel
+MASTER_SITES=	# empty
+DISTFILES=	# empty
+
+MAINTAINER=	tnn@NetBSD.org
+HOMEPAGE=	http://www.pkgsrc.org/
+COMMENT=	Library that provides setenv(3) and unsetenv(3) implementations
+
+NO_CHECKSUM=	yes
+NO_CONFIGURE=	yes
+USE_LIBTOOL=	yes
+
+do-extract:
+	cp -R ${FILESDIR} ${WRKSRC}
+
+do-build:
+	cd ${WRKSRC} && ${LIBTOOL} --mode=compile ${COMPILE.c} libsetenv.c
+	cd ${WRKSRC} && ${LIBTOOL} --mode=link ${LINK.c} -o libsetenv.la \
+		libsetenv.lo -rpath ${PREFIX}/lib
+
+do-install:
+	${INSTALL_DATA} ${WRKSRC}/libsetenv.h ${PREFIX}/include/
+	${LIBTOOL} --mode=install ${INSTALL_LIB} ${WRKSRC}/libsetenv.la ${PREFIX}/lib/
+
+.include "../../mk/bsd.pkg.mk"
diff --git a/devel/libsetenv/PLIST b/devel/libsetenv/PLIST
new file mode 100644
index 00000000000..ace33bc4c36
--- /dev/null
+++ b/devel/libsetenv/PLIST
@@ -0,0 +1,3 @@
+@comment $NetBSD: PLIST,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $
+include/libsetenv.h
+lib/libsetenv.la
diff --git a/devel/libsetenv/buildlink3.mk b/devel/libsetenv/buildlink3.mk
new file mode 100644
index 00000000000..b76eb935195
--- /dev/null
+++ b/devel/libsetenv/buildlink3.mk
@@ -0,0 +1,19 @@
+# $NetBSD: buildlink3.mk,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $
+
+BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH}+
+LIBSETENV_BUILDLINK3_MK:=	${LIBSETENV_BUILDLINK3_MK}+
+
+.if ${BUILDLINK_DEPTH} == "+"
+BUILDLINK_DEPENDS+=	libsetenv
+.endif
+
+BUILDLINK_PACKAGES:=	${BUILDLINK_PACKAGES:Nlibsetenv}
+BUILDLINK_PACKAGES+=	libsetenv
+BUILDLINK_ORDER:=	${BUILDLINK_ORDER} ${BUILDLINK_DEPTH}libsetenv
+
+.if ${LIBSETENV_BUILDLINK3_MK} == "+"
+BUILDLINK_API_DEPENDS.libsetenv+=	libsetenv>=0.1
+BUILDLINK_PKGSRCDIR.libsetenv?=		../../devel/libsetenv
+.endif	# LIBSETENV_BUILDLINK3_MK
+
+BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH:S/+$//}
diff --git a/devel/libsetenv/builtin.mk b/devel/libsetenv/builtin.mk
new file mode 100644
index 00000000000..c830eddb0bd
--- /dev/null
+++ b/devel/libsetenv/builtin.mk
@@ -0,0 +1,79 @@
+# $NetBSD: builtin.mk,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $
+#
+
+BUILTIN_PKG:=	libsetenv
+
+BUILTIN_FIND_FILES_VAR:=        H_STDLIB
+BUILTIN_FIND_FILES.H_STDLIB=    /usr/include/stdlib.h
+BUILTIN_FIND_GREP.H_STDLIB=     setenv
+
+.include "../../mk/buildlink3/bsd.builtin.mk"
+
+#
+###
+### Determine if there is a built-in implementation of the package and
+### set IS_BUILTIN.<pkg> appropriately ("yes" or "no").
+###
+.if !defined(IS_BUILTIN.libsetenv)
+IS_BUILTIN.libsetenv=	no
+.  if empty(H_STDLIB:M__nonexistent__)
+IS_BUILTIN.libsetenv=	yes
+.  endif
+.endif
+MAKEVARS+=	IS_BUILTIN.libsetenv
+#
+###
+### If there is a built-in implementation, then set BUILTIN_PKG.<pkg> to
+### a package name to represent the built-in package.
+###
+.if !defined(BUILTIN_PKG.libsetenv) && \
+    !empty(IS_BUILTIN.libsetenv:M[yY][eE][sS])
+BUILTIN_PKG.libsetenv=	libsetenv-0.1
+.endif
+MAKEVARS+=	BUILTIN_PKG.libsetenv
+#
+###
+### Determine whether we should use the built-in implementation if it
+### exists, and set USE_BUILTIN.<pkg> appropriate ("yes" or "no").
+###
+.if !defined(USE_BUILTIN.libsetenv)
+.  if ${PREFER.libsetenv} == "pkgsrc"
+USE_BUILTIN.libsetenv=	no
+.  else
+USE_BUILTIN.libsetenv=	${IS_BUILTIN.libsetenv}
+.    if defined(BUILTIN_PKG.libsetenv) && \
+        !empty(IS_BUILTIN.libsetenv:M[yY][eE][sS])
+USE_BUILTIN.libsetenv=	yes
+.      for _dep_ in ${BUILDLINK_API_DEPENDS.libsetenv}
+.        if !empty(USE_BUILTIN.libsetenv:M[yY][eE][sS])
+USE_BUILTIN.libsetenv!=							\
+if ${PKG_ADMIN} pmatch ${_dep_:Q} ${BUILTIN_PKG.libsetenv:Q}; then	\
+	${ECHO} "yes";						\
+else								\
+	${ECHO} "no";						\
+fi
+.        endif
+.      endfor
+.    endif
+.  endif
+.endif
+MAKEVARS+=	USE_BUILTIN.libsetenv
+#
+###
+### The section below only applies if we are not including this file
+### solely to determine whether a built-in implementation exists.
+###
+CHECK_BUILTIN.libsetenv?=	no
+.if !empty(CHECK_BUILTIN.libsetenv:M[nN][oO])
+
+.  if !empty(USE_BUILTIN.libsetenv:M[nN][oO])
+_BLTN_LIBSETENV=	-lsetenv
+.  else
+_BLTN_LIBSETENV=	# empty
+.  endif
+BUILDLINK_LDADD.libsetenv?=	${_BLTN_LIBSETENV}
+
+CONFIGURE_ENV+=		LIBSETENV=${BUILDLINK_LDADD.libsetenv:Q}
+MAKE_ENV+=		LIBSETENV=${BUILDLINK_LDADD.libsetenv:Q}
+
+.endif  # CHECK_BUILTIN.libsetenv
diff --git a/devel/libsetenv/files/libsetenv.c b/devel/libsetenv/files/libsetenv.c
new file mode 100644
index 00000000000..d6318248668
--- /dev/null
+++ b/devel/libsetenv/files/libsetenv.c
@@ -0,0 +1,154 @@
+/*	$NetBSD: libsetenv.c,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $	*/
+
+/*
+ * Copyright (c) 1987, 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. 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+extern char **environ;
+
+/*
+ * __findenv --
+ *	Returns pointer to value associated with name, if any, else NULL.
+ *	Sets offset to be the offset of the name/value combination in the
+ *	environmental array, for use by setenv(3) and unsetenv(3).
+ *	Explicitly removes '=' in argument name.
+ *
+ *	This routine *should* be a static; don't use it.
+ */
+static char *
+__findenv(const char *name, int *offset)
+{
+	size_t len;
+	const char *np;
+	char **p, *c;
+
+	if (name == NULL || environ == NULL)
+		return NULL;
+	for (np = name; *np && *np != '='; ++np)
+		continue;
+	len = np - name;
+	for (p = environ; (c = *p) != NULL; ++p)
+		if (strncmp(c, name, len) == 0 && c[len] == '=') {
+			*offset = p - environ;
+			return c + len + 1;
+		}
+	return NULL;
+}
+
+/*
+ * setenv --
+ *	Set the value of the environmental variable "name" to be
+ *	"value".  If rewrite is set, replace any current value.
+ */
+int
+setenv(name, value, rewrite)
+	const char *name;
+	const char *value;
+	int rewrite;
+{
+	static char **saveenv;	/* copy of previously allocated space */
+	char *c, **newenv;
+	const char *cc;
+	size_t l_value, size;
+	int offset;
+
+	if (*value == '=')			/* no `=' in value */
+		++value;
+	l_value = strlen(value);
+	/* find if already exists */
+	if ((c = __findenv(name, &offset)) != NULL) {
+		if (!rewrite)
+			goto good;
+		if (strlen(c) >= l_value)	/* old larger; copy over */
+			goto copy;
+	} else {					/* create new slot */
+		size_t cnt;
+
+		for (cnt = 0; environ[cnt]; ++cnt)
+			continue;
+		size = (size_t)(sizeof(char *) * (cnt + 2));
+		if (saveenv == environ) {		/* just increase size */
+			if ((newenv = realloc(saveenv, size)) == NULL)
+				goto bad;
+			saveenv = newenv;
+		} else {				/* get new space */
+			free(saveenv);
+			if ((saveenv = malloc(size)) == NULL)
+				goto bad;
+			(void)memcpy(saveenv, environ, cnt * sizeof(char *));
+		}
+		environ = saveenv;
+		environ[cnt + 1] = NULL;
+		offset = (int)cnt;
+	}
+	for (cc = name; *cc && *cc != '='; ++cc)	/* no `=' in name */
+		continue;
+	size = cc - name;
+	/* name + `=' + value */
+	if ((environ[offset] = malloc(size + l_value + 2)) == NULL)
+		goto bad;
+	c = environ[offset];
+	(void)memcpy(c, name, size);
+	c += size;
+	*c++ = '=';
+copy:
+	(void)memcpy(c, value, l_value + 1);
+good:
+	return 0;
+bad:
+	return -1;
+}
+
+/*
+ * unsetenv(name) --
+ *	Delete environmental variable "name".
+ */
+int
+unsetenv(name)
+	const char *name;
+{
+	char **p;
+	int offset;
+
+	if (name == NULL || *name == '\0' || strchr(name, '=') != NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	while (__findenv(name, &offset))	/* if set multiple times */
+		for (p = &environ[offset];; ++p)
+			if (!(*p = *(p + 1)))
+				break;
+
+	return 0;
+}
diff --git a/devel/libsetenv/files/libsetenv.h b/devel/libsetenv/files/libsetenv.h
new file mode 100644
index 00000000000..48583b0c628
--- /dev/null
+++ b/devel/libsetenv/files/libsetenv.h
@@ -0,0 +1,4 @@
+/* $NetBSD: libsetenv.h,v 1.1.1.1 2007/08/03 21:30:59 tnn Exp $ */
+
+int	setenv(const char *, const char *, int);
+int	unsetenv(const char *);