Use POSIX macros for linux

cde/lib/DtTerm/TermPrim/TermHeader.h

@@ -44,7 +44,7 @@
 #include <Xm/Xm.h>
 #include <X11/Xos.h>
 
-#if defined(linux) || defined(CSRG_BASED)
+#if defined(__linux__) || defined(CSRG_BASED)
 #define _NFILE   FOPEN_MAX
 #endif
 

cde/lib/DtTerm/TermPrim/TermPrim.c

@@ -81,7 +81,7 @@ extern char * _DtTermPrimGetMessage( char *filename, int set, int n, char *s );
 #include <ctype.h>
 #include <nl_types.h>
 #include <wchar.h>
-#if defined(linux) || defined(hpV4)
+#if defined(__linux__) || defined(hpV4)
 # include <sys/types.h> /* For FD_* macros. */
 # include <sys/time.h> /* For select() prototype. */
 #else

cde/lib/DtTerm/TermPrim/TermPrimDebug.c

@@ -39,7 +39,7 @@ static char rcs_id[] = "$XConsortium: TermPrimDebug.c /main/4 1996/11/21 19:58:1
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
-#if defined(linux) || defined(CSRG_BASED) || defined(sun)
+#if defined(__linux__) || defined(CSRG_BASED) || defined(sun)
 # include <stdarg.h>
 #else
 # include <varargs.h>

cde/lib/DtTerm/TermPrim/TermPrimGetPty-clone.c

@@ -49,7 +49,7 @@ static char rcs_id[] = "$TOG: TermPrimGetPty-clone.c /main/7 1998/04/03 17:11:08
 
 #if defined(__AIX)
 # define	PTY_CLONE_DEVICE	"/dev/ptc"
-#elif defined(linux)
+#elif defined(__linux__)
 # define	PTY_CLONE_DEVICE	"/dev/ptyc"
 #endif	/* __AIX */
 
@@ -72,7 +72,7 @@ GetPty(char **ptySlave, char **ptyMaster)
 
     if ((ptyFd = open(*ptyMaster, O_RDWR, 0))) {
         _Xttynameparams tty_buf;
-#if defined(linux)
+#if defined(__linux__)
 	if (c = _XTtyname(ptyFd)) {
 #else
 	if (c = _XTtyname(ptyFd, tty_buf)) {

cde/lib/DtTerm/TermPrim/TermPrimGetPty-svr4.c

@@ -43,14 +43,14 @@ static char rcs_id[] = "$XConsortium: TermPrimGetPty-svr4.c /main/1 1996/04/21 1
 #include "TermPrimOSDepI.h"
 #include "TermPrimDebug.h"
 #include "TermHeader.h"
-#if !defined(linux)
+#if !defined(__linux__)
 #include <stropts.h>
 #include <sys/conf.h>
 #include <sys/stream.h>
 #endif
 #include <sys/termios.h>
 
-#if defined(linux)
+#if defined(__linux__)
 #undef USE_STREAMS_BUFMOD
 #endif
 
@@ -260,7 +260,7 @@ SetupPty(char *ptySlave, int ptyFd)
      * they don't seem to stick after the file is closed on
      * SVR4.2.  Not sure where else this applies.
      */
-#if !defined(linux)
+#if !defined(__linux__)
     if (ioctl(ptyFd, I_PUSH, "ptem") == -1) {
 	    (void) perror("Error pushing ptem");
 	    /* exit the subprocess */

cde/lib/DtTerm/TermPrim/TermPrimSetUtmp.c

@@ -385,7 +385,7 @@ UtmpEntryCreate(Widget w, pid_t pid, char *utmpLine)
 	(void) strncpy(utPtr->ut_id, utmpLine,
 		sizeof(utPtr->ut_id));
 #else	/* __AIX */
-#if defined(linux) || defined(sun)
+#if defined(__linux__) || defined(sun)
 	if (c = strchr(utmpLine, '/')) {
 	    c++;
 	} else {
@@ -401,7 +401,7 @@ UtmpEntryCreate(Widget w, pid_t pid, char *utmpLine)
 
     /* set up the new entry... */
     utPtr->ut_type = USER_PROCESS;
-#if !defined(linux)
+#if !defined(__linux__)
     utPtr->ut_exit.e_termination = 0;
     utPtr->ut_exit.e_exit = 2;
 #endif
@@ -528,7 +528,7 @@ UtmpEntryDestroy(Widget w, char *utmpLine)
     (void) setutent();
     if (utPtr = getutline(&ut)) {
 	utPtr->ut_type = DEAD_PROCESS;
-#if !defined(linux)
+#if !defined(__linux__)
 	utPtr->ut_exit.e_termination = 0;
 	utPtr->ut_exit.e_exit = 0;
 #endif