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Diffstat (limited to 'src/libposixplz/getpeereid.c')
-rw-r--r--src/libposixplz/getpeereid.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/libposixplz/getpeereid.c b/src/libposixplz/getpeereid.c
new file mode 100644
index 0000000..ae1142f
--- /dev/null
+++ b/src/libposixplz/getpeereid.c
@@ -0,0 +1,66 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+
+#ifdef SKALIBS_HASGETPEEREID
+/* syscall exists - do nothing */
+
+#else
+
+#ifdef SKALIBS_HASSOPEERCRED
+/* implementation with SO_PEERCRED */
+
+#include <skalibs/nonposix.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <skalibs/posixplz.h>
+
+int getpeereid (int s, uid_t *u, gid_t *g)
+{
+ struct ucred blah ;
+ socklen_t len = sizeof(blah) ;
+
+ if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &blah, &len) == -1)
+ return -1 ;
+ *u = blah.uid ;
+ *g = blah.gid ;
+ return 0 ;
+}
+
+#else
+
+#ifdef SKALIBS_HASGETPEERUCRED
+/* implementation with getpeerucred() */
+
+#include <skalibs/nonposix.h>
+#include <ucred.h>
+#include <skalibs/posixplz.h>
+
+int getpeereid (int s, uid_t *u, gid_t *g)
+{
+ ucred_t *cred ;
+ if (getpeerucred(s, &cred) == -1) return -1 ;
+ *u = ucred_geteuid(cred) ;
+ *g = ucred_getegid(cred) ;
+ ucred_free(cred) ;
+ return 0 ;
+}
+
+#else
+
+/* can't find a real implementation, make a stub */
+
+#include <errno.h>
+#include <skalibs/posixplz.h>
+
+int getpeereid (int s, uid_t *uid, gid_t *gid)
+{
+ (void)s ;
+ *uid = *gid = -1 ;
+ errno = ENOSYS ;
+ return -1 ;
+}
+
+#endif
+#endif
+#endif