Fixed error handling. Set serrno in all cases

mediachanger/castorrmc/common/Cgrp.c

@@ -14,6 +14,7 @@
 #include <grp.h>
 
 #include <Cglobals.h>
+#include <errno.h>
 #include <serrno.h>
 #include <Cgrp.h>
 #include <osdep.h>
@@ -49,7 +50,9 @@ CONST char *name;
         serrno = SEINTERNAL;
         return(NULL);
     }
+    errno = 0;
     rc = getgrnam_r(name,grp,grpbuf,grpbuflen,&result);
+    serrno = ENOENT==errno?SEGROUPUNKN:SEINTERNAL;
     return(result);
 #endif
 }
@@ -85,7 +88,9 @@ gid_t gid;
         serrno = SEINTERNAL;
         return(NULL);
     }
+    errno = 0;
     rc = getgrgid_r(gid,grp,grpbuf,grpbuflen,&result);
+    serrno = ENOENT==errno?SEGROUPUNKN:SEINTERNAL;
     return(result);
 #endif
 }

mediachanger/castorrmc/common/Cgrp.man

@@ -10,16 +10,26 @@
 .P
 .BI "struct group *Cgetgrgid(gid_t " gid ");"
 
-.SH ERRORS
-If the \fBCthread\fP interface is chosen and activated, the errors value are in the \fBserrno\fP variable.
-
 .SH DESCRIPTION
 
-\fBCgrp\fP is a common Thread-Safe API interface to get entries in the group file vs.
+\fBCgrp\fP is a common Thread-Safe API interface to get entries in the group file by
 .BI name
 or
 .BI gid.
 
+.SH RETURN VALUE
+These routines return a group struct for the given name/gid.
+In case of error, 0 is returned and the \fBserrno\fP variable is set.
+
+.SH ERRORS
+possible values for serrno and their meaning :
+.TP 1.2i
+.B SEGROUPUNKN
+the requested group/gid was not found
+.TP
+.B SEINTERNAL
+an error occured while attempting to retrieve the group structure. More details are given in the errno variable.
+
 .SH SEE ALSO
 \fBserrno\fP, \fBgetgrnam\fP, \fBgetgrgid\fP
 

mediachanger/castorrmc/common/Cpwd.man

@@ -10,16 +10,26 @@
 .P
 .BI "struct passwd *Cgetpwuid(uid_t " uid ");"
 
-.SH ERRORS
-If the \fBCthread\fP interface is chosen and activated, the errors value are in the \fBserrno\fP variable.
-
 .SH DESCRIPTION
 
-\fBCpwd\fP is a common Thread-Safe API interface to get entries in the password file vs.
+\fBCpwd\fP is a common Thread-Safe API interface to get entries in the password file by
 .BI name
 or
 .BI uid.
 
+.SH RETURN VALUE
+These routines return a passwd struct for the given name/uid.
+In case of error, 0 is returned and the \fBserrno\fP variable is set.
+
+.SH ERRORS
+possible values for serrno and their meaning :
+.TP 1.2i
+.B SEUSERUNKN
+the requested user/uid was not found
+.TP
+.B SEINTERNAL
+an error occured while attempting to retrieve the passwd structure. More details are given in the errno variable.
+
 .SH SEE ALSO
 \fBserrno\fP, \fBgetpwnam\fP, \fBgetpwuid\fP