1 files changed, 306 insertions, 0 deletions
diff --git a/lib/sgroupio.c b/lib/sgroupio.c
new file mode 100644
index 0000000..871749b
--- /dev/null
+++ b/lib/sgroupio.c
@@ -0,0 +1,306 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001       , Michał Moskal
+ * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2013, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifdef SHADOWGRP
+
+#ident "$Id$"
+
+#include "prototypes.h"
+#include "defines.h"
+#include "commonio.h"
+#include "getdef.h"
+#include "sgroupio.h"
+
+/*@null@*/ /*@only@*/struct sgrp *__sgr_dup (const struct sgrp *sgent)
+{
+	struct sgrp *sg;
+	int i;
+
+	sg = (struct sgrp *) malloc (sizeof *sg);
+	if (NULL == sg) {
+		return NULL;
+	}
+	/* Do the same as the other _dup function, even if we know the
+	 * structure. */
+	memset (sg, 0, sizeof *sg);
+	/*@-mustfreeonly@*/
+	sg->sg_name = strdup (sgent->sg_name);
+	/*@=mustfreeonly@*/
+	if (NULL == sg->sg_name) {
+		free (sg);
+		return NULL;
+	}
+	/*@-mustfreeonly@*/
+	sg->sg_passwd = strdup (sgent->sg_passwd);
+	/*@=mustfreeonly@*/
+	if (NULL == sg->sg_passwd) {
+		free (sg->sg_name);
+		free (sg);
+		return NULL;
+	}
+
+	for (i = 0; NULL != sgent->sg_adm[i]; i++);
+	/*@-mustfreeonly@*/
+	sg->sg_adm = (char **) malloc ((i + 1) * sizeof (char *));
+	/*@=mustfreeonly@*/
+	if (NULL == sg->sg_adm) {
+		free (sg->sg_passwd);
+		free (sg->sg_name);
+		free (sg);
+		return NULL;
+	}
+	for (i = 0; NULL != sgent->sg_adm[i]; i++) {
+		sg->sg_adm[i] = strdup (sgent->sg_adm[i]);
+		if (NULL == sg->sg_adm[i]) {
+			for (i = 0; NULL != sg->sg_adm[i]; i++) {
+				free (sg->sg_adm[i]);
+			}
+			free (sg->sg_adm);
+			free (sg->sg_passwd);
+			free (sg->sg_name);
+			free (sg);
+			return NULL;
+		}
+	}
+	sg->sg_adm[i] = NULL;
+
+	for (i = 0; NULL != sgent->sg_mem[i]; i++);
+	/*@-mustfreeonly@*/
+	sg->sg_mem = (char **) malloc ((i + 1) * sizeof (char *));
+	/*@=mustfreeonly@*/
+	if (NULL == sg->sg_mem) {
+		for (i = 0; NULL != sg->sg_adm[i]; i++) {
+			free (sg->sg_adm[i]);
+		}
+		free (sg->sg_adm);
+		free (sg->sg_passwd);
+		free (sg->sg_name);
+		free (sg);
+		return NULL;
+	}
+	for (i = 0; NULL != sgent->sg_mem[i]; i++) {
+		sg->sg_mem[i] = strdup (sgent->sg_mem[i]);
+		if (NULL == sg->sg_mem[i]) {
+			for (i = 0; NULL != sg->sg_mem[i]; i++) {
+				free (sg->sg_mem[i]);
+			}
+			free (sg->sg_mem);
+			for (i = 0; NULL != sg->sg_adm[i]; i++) {
+				free (sg->sg_adm[i]);
+			}
+			free (sg->sg_adm);
+			free (sg->sg_passwd);
+			free (sg->sg_name);
+			free (sg);
+			return NULL;
+		}
+	}
+	sg->sg_mem[i] = NULL;
+
+	return sg;
+}
+
+static /*@null@*/ /*@only@*/void *gshadow_dup (const void *ent)
+{
+	const struct sgrp *sg = ent;
+
+	return __sgr_dup (sg);
+}
+
+static void gshadow_free (/*@out@*/ /*@only@*/void *ent)
+{
+	struct sgrp *sg = ent;
+
+	sgr_free (sg);
+}
+
+void sgr_free (/*@out@*/ /*@only@*/struct sgrp *sgent)
+{
+	size_t i;
+	free (sgent->sg_name);
+	if (NULL != sgent->sg_passwd) {
+		strzero (sgent->sg_passwd);
+		free (sgent->sg_passwd);
+	}
+	for (i = 0; NULL != sgent->sg_adm[i]; i++) {
+		free (sgent->sg_adm[i]);
+	}
+	free (sgent->sg_adm);
+	for (i = 0; NULL != sgent->sg_mem[i]; i++) {
+		free (sgent->sg_mem[i]);
+	}
+	free (sgent->sg_mem);
+	free (sgent);
+}
+
+static const char *gshadow_getname (const void *ent)
+{
+	const struct sgrp *gr = ent;
+
+	return gr->sg_name;
+}
+
+static void *gshadow_parse (const char *line)
+{
+	return (void *) sgetsgent (line);
+}
+
+static int gshadow_put (const void *ent, FILE * file)
+{
+	const struct sgrp *sg = ent;
+
+	if (   (NULL == sg)
+	    || (valid_field (sg->sg_name, ":\n") == -1)
+	    || (valid_field (sg->sg_passwd, ":\n") == -1)) {
+		return -1;
+	}
+
+	/* FIXME: fail also if sg->sg_adm == NULL ?*/
+	if (NULL != sg->sg_adm) {
+		size_t i;
+		for (i = 0; NULL != sg->sg_adm[i]; i++) {
+			if (valid_field (sg->sg_adm[i], ",:\n") == -1) {
+				return -1;
+			}
+		}
+	}
+
+	/* FIXME: fail also if sg->sg_mem == NULL ?*/
+	if (NULL != sg->sg_mem) {
+		size_t i;
+		for (i = 0; NULL != sg->sg_mem[i]; i++) {
+			if (valid_field (sg->sg_mem[i], ",:\n") == -1) {
+				return -1;
+			}
+		}
+	}
+
+	return (putsgent (sg, file) == -1) ? -1 : 0;
+}
+
+static struct commonio_ops gshadow_ops = {
+	gshadow_dup,
+	gshadow_free,
+	gshadow_getname,
+	gshadow_parse,
+	gshadow_put,
+	fgetsx,
+	fputsx,
+	NULL,			/* open_hook */
+	NULL			/* close_hook */
+};
+
+static struct commonio_db gshadow_db = {
+	SGROUP_FILE,		/* filename */
+	&gshadow_ops,		/* ops */
+	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
+	0400,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
+	NULL,			/* head */
+	NULL,			/* tail */
+	NULL,			/* cursor */
+	false,			/* changed */
+	false,			/* isopen */
+	false,			/* locked */
+	false,			/* readonly */
+	false			/* setname */
+};
+
+int sgr_setdbname (const char *filename)
+{
+	return commonio_setname (&gshadow_db, filename);
+}
+
+/*@observer@*/const char *sgr_dbname (void)
+{
+	return gshadow_db.filename;
+}
+
+bool sgr_file_present (void)
+{
+	if (getdef_bool ("FORCE_SHADOW"))
+		return true;
+	return commonio_present (&gshadow_db);
+}
+
+int sgr_lock (void)
+{
+	return commonio_lock (&gshadow_db);
+}
+
+int sgr_open (int mode)
+{
+	return commonio_open (&gshadow_db, mode);
+}
+
+/*@observer@*/ /*@null@*/const struct sgrp *sgr_locate (const char *name)
+{
+	return commonio_locate (&gshadow_db, name);
+}
+
+int sgr_update (const struct sgrp *sg)
+{
+	return commonio_update (&gshadow_db, (const void *) sg);
+}
+
+int sgr_remove (const char *name)
+{
+	return commonio_remove (&gshadow_db, name);
+}
+
+int sgr_rewind (void)
+{
+	return commonio_rewind (&gshadow_db);
+}
+
+/*@null@*/const struct sgrp *sgr_next (void)
+{
+	return commonio_next (&gshadow_db);
+}
+
+int sgr_close (void)
+{
+	return commonio_close (&gshadow_db);
+}
+
+int sgr_unlock (void)
+{
+	return commonio_unlock (&gshadow_db);
+}
+
+void __sgr_set_changed (void)
+{
+	gshadow_db.changed = true;
+}
+
+/*@dependent@*/ /*@null@*/struct commonio_entry *__sgr_get_head (void)
+{
+	return gshadow_db.head;
+}
+
+void __sgr_del_entry (const struct commonio_entry *ent)
+{
+	commonio_del_entry (&gshadow_db, ent);
+}
+
+/* Sort with respect to group ordering. */
+int sgr_sort ()
+{
+	return commonio_sort_wrt (&gshadow_db, __gr_get_db ());
+}
+#else
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif