Rename mm (memory manager) to pm (process manager), involved renaming

dir..
2005-05-03 15:35:52 +00:00
parent 83ef55e301
commit 0e9261ed5a
21 changed files with 3402 additions and 1 deletions
@@ -0,0 +1,78 @@
+/* This file handles the 4 system calls that get and set uids and gids.
+ * It also handles getpid(), setsid(), and getpgrp().  The code for each
+ * one is so tiny that it hardly seemed worthwhile to make each a separate
+ * function.
+ */
+
+#include "mm.h"
+#include <minix/callnr.h>
+#include <signal.h>
+#include "mproc.h"
+#include "param.h"
+
+/*===========================================================================*
+ *				do_getset				     *
+ *===========================================================================*/
+PUBLIC int do_getset()
+{
+/* Handle GETUID, GETGID, GETPID, GETPGRP, SETUID, SETGID, SETSID.  The four
+ * GETs and SETSID return their primary results in 'r'.  GETUID, GETGID, and
+ * GETPID also return secondary results (the effective IDs, or the parent
+ * process ID) in 'reply_res2', which is returned to the user.
+ */
+
+  register struct mproc *rmp = mp;
+  register int r;
+
+  switch(call_nr) {
+	case GETUID:
+		r = rmp->mp_realuid;
+		rmp->mp_reply.reply_res2 = rmp->mp_effuid;
+		break;
+
+	case GETGID:
+		r = rmp->mp_realgid;
+		rmp->mp_reply.reply_res2 = rmp->mp_effgid;
+		break;
+
+	case GETPID:
+		r = mproc[who].mp_pid;
+		rmp->mp_reply.reply_res2 = mproc[rmp->mp_parent].mp_pid;
+		break;
+
+	case SETUID:
+		if (rmp->mp_realuid != (uid_t) m_in.usr_id && 
+				rmp->mp_effuid != SUPER_USER)
+			return(EPERM);
+		rmp->mp_realuid = (uid_t) m_in.usr_id;
+		rmp->mp_effuid = (uid_t) m_in.usr_id;
+		tell_fs(SETUID, who, rmp->mp_realuid, rmp->mp_effuid);
+		r = OK;
+		break;
+
+	case SETGID:
+		if (rmp->mp_realgid != (gid_t) m_in.grp_id && 
+				rmp->mp_effuid != SUPER_USER)
+			return(EPERM);
+		rmp->mp_realgid = (gid_t) m_in.grp_id;
+		rmp->mp_effgid = (gid_t) m_in.grp_id;
+		tell_fs(SETGID, who, rmp->mp_realgid, rmp->mp_effgid);
+		r = OK;
+		break;
+
+	case SETSID:
+		if (rmp->mp_procgrp == rmp->mp_pid) return(EPERM);
+		rmp->mp_procgrp = rmp->mp_pid;
+		tell_fs(SETSID, who, 0, 0);
+		/*FALL THROUGH*/
+
+	case GETPGRP:
+		r = rmp->mp_procgrp;
+		break;
+
+	default:
+		r = EINVAL;
+		break;	
+  }
+  return(r);
+}