#ifndef UTIL_H
#define UTIL_H
+#ifndef CONFIG_H
+# include "config.h"
+#endif
+
+#include <sys/types.h>
+
#ifdef __cplusplus
extern "C" {
#endif
+/*----- Macros ------------------------------------------------------------*/
+
+/* --- @IGNORE@ --- *
+ *
+ * Arguments: @expr@ = an expression whose value is to be ignored
+ *
+ * Use: Ignores the value of an expression, even if compilers want
+ * us not to.
+ */
+
+#define IGNORE(expr) do { if (expr) ; } while (0)
+
/*----- Functions provided ------------------------------------------------*/
/* --- @u_quotify@ --- *
extern void u_quotify(dstr */*d*/, const char */*p*/);
+/* --- @u_getuser@ --- *
+ *
+ * Arguments: @const char *name@ = user name or id requested
+ * @gid_t *gg@ = where to store corresponding gid
+ *
+ * Returns: Corresponding uid.
+ *
+ * Use: Resolves a user name into a uid. Dies on failure; suitable
+ * for use in argument parsing.
+ */
+
+extern uid_t u_getuser(const char */*name*/, gid_t */*gg*/);
+
+/* --- @u_getgroup@ --- *
+ *
+ * Arguments: @const char *name@ = user name or id requested
+ *
+ * Returns: Corresponding gid.
+ *
+ * Use: Resolves a group name into a gid. Dies on failure; suitable
+ * for use in argument parsing.
+ */
+
+extern gid_t u_getgroup(const char */*name*/);
+
+/* --- @u_setugid@ --- *
+ *
+ * Arguments: @uid_t u@ = user to set
+ * @gid_t g@ = group to set
+ *
+ * Returns: ---
+ *
+ * Use: Sets user and group to the given values; aborts on failure.
+ */
+
+extern void u_setugid(uid_t /*u*/, gid_t /*g*/);
+
/*----- That's all, folks -------------------------------------------------*/
#ifdef __cplusplus