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-rw-r--r--libmisc/getgr_nam_gid.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/libmisc/getgr_nam_gid.c b/libmisc/getgr_nam_gid.c
new file mode 100644
index 0000000..027280a
--- /dev/null
+++ b/libmisc/getgr_nam_gid.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 1991 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2000 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2009, Nicolas François
+ * 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. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ * HOLDERS 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 <config.h>
+
+#ident "$Id$"
+
+#include <stdlib.h>
+#include <errno.h>
+#include <grp.h>
+#include "prototypes.h"
+
+/*
+ * getgr_nam_gid - Return a pointer to the group specified by a string.
+ * The string may be a valid GID or a valid groupname.
+ * If the group does not exist on the system, NULL is returned.
+ */
+extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname)
+{
+ long long int gid;
+ char *endptr;
+
+ if (NULL == grname) {
+ return NULL;
+ }
+
+ errno = 0;
+ gid = strtoll (grname, &endptr, 10);
+ if ( ('\0' != *grname)
+ && ('\0' == *endptr)
+ && (ERANGE != errno)
+ && (/*@+longintegral@*/gid == (gid_t)gid)/*@=longintegral@*/) {
+ return xgetgrgid ((gid_t) gid);
+ }
+ return xgetgrnam (grname);
+}
+