use flock so data base can be updated directly.

SCCS-vsn: lib/libc/gen/getpwnamuid.c 4.2

diff --git a/usr/src/lib/libc/gen/getpwnamuid.c b/usr/src/lib/libc/gen/getpwnamuid.c
index dae0def..17f69dc 100644 (file)
--- a/usr/src/lib/libc/gen/getpwnamuid.c
+++ b/usr/src/lib/libc/gen/getpwnamuid.c
@@ -1,4 +1,4 @@
-/*     getpwnamuid.c   4.1     83/12/02        */
+/*     getpwnamuid.c   4.2     83/12/20        */

 
 #include <stdio.h>
 #include <pwd.h>
 
 #include <stdio.h>
 #include <pwd.h>


@@ -49,6 +49,8 @@ getpwnam(nam)
 
         if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                 return ((struct passwd *)NULL);
 
         if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                 return ((struct passwd *)NULL);

+       if (flock(db->db_dirf, LOCK_SH) < 0)
+                return ((struct passwd *)NULL);

         key.dptr = nam;
         key.dsize = strlen(nam);
        pw = fetchpw(key);
         key.dptr = nam;
         key.dsize = strlen(nam);
        pw = fetchpw(key);


@@ -65,6 +67,8 @@ getpwuid(uid)
 
         if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                 return ((struct passwd *)NULL);
 
         if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                 return ((struct passwd *)NULL);

+       if (flock(db->db_dirf, LOCK_SH) < 0)
+                return ((struct passwd *)NULL);

         key.dptr = (char *) &uid;
         key.dsize = sizeof uid;
        pw = fetchpw(key);
         key.dptr = (char *) &uid;
         key.dsize = sizeof uid;
        pw = fetchpw(key);