ncurses 6.3 - patch 20220724

[ncurses.git] / ncurses / trace / lib_trace.c

diff --git a/ncurses/trace/lib_trace.c b/ncurses/trace/lib_trace.c
index 717c7da1608701b5bd431f3dfed1c45933c6feb0..b6f2a75e5ed3ee0a821a8bde2768f81261b6cc79 100644 (file)
--- a/ncurses/trace/lib_trace.c
+++ b/ncurses/trace/lib_trace.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2018,2019 Free Software Foundation, Inc.              *
+ * Copyright 2018-2021,2022 Thomas E. Dickey                                *
+ * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -36,7 +37,7 @@
 /*
  *     lib_trace.c - Tracing/Debugging routines
  *
- * The _tracef() function is originally from pcurses (by Pavel Curtis) in 1982. 
+ * The _tracef() function is originally from pcurses (by Pavel Curtis) in 1982.
  * pcurses allowed one to enable/disable tracing using traceon() and traceoff()
  * functions.  ncurses provides a trace() function which allows one to
  * selectively enable or disable several tracing features.
@@ -47,7 +48,7 @@
 
 #include <ctype.h>
 
-MODULE_ID("$Id: lib_trace.c,v 1.92 2019/03/23 23:47:16 tom Exp $")
+MODULE_ID("$Id: lib_trace.c,v 1.100 2022/07/23 20:08:45 tom Exp $")
 
 NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */
 
@@ -91,10 +92,24 @@ NCURSES_EXPORT_VAR(long) _nc_outchars = 0;
 #define MyPath         _nc_globals.trace_fname
 #define MyLevel                _nc_globals.trace_level
 #define MyNested       _nc_globals.nested_tracef
+#endif /* TRACE */
 
-NCURSES_EXPORT(void)
-trace(const unsigned int tracelevel)
+#if USE_REENTRANT
+#define Locked(statement) { \
+       _nc_lock_global(tst_tracef); \
+       statement; \
+       _nc_unlock_global(tst_tracef); \
+    }
+#else
+#define Locked(statement) statement
+#endif
+
+NCURSES_EXPORT(unsigned)
+curses_trace(unsigned tracelevel)
 {
+    unsigned result;
+#if defined(TRACE)
+    Locked(result = _nc_tracing);
     if ((MyFP == 0) && tracelevel) {
        MyInit = TRUE;
        if (MyFD >= 0) {
@@ -113,16 +128,17 @@ trace(const unsigned int tracelevel)
                    _nc_STRCAT(MyPath, ".log", sizeof(MyPath));
                }
            }
+#define SAFE_MODE (O_CREAT | O_EXCL | O_RDWR)
            if (_nc_access(MyPath, W_OK) < 0
-               || (MyFD = open(MyPath, O_CREAT | O_EXCL | O_RDWR, 0600)) < 0
+               || (MyFD = safe_open3(MyPath, SAFE_MODE, 0600)) < 0
                || (MyFP = fdopen(MyFD, BIN_W)) == 0) {
                ;               /* EMPTY */
            }
        }
-       _nc_tracing = tracelevel;
+       Locked(_nc_tracing = tracelevel);
        /* Try to set line-buffered mode, or (failing that) unbuffered,
         * so that the trace-output gets flushed automatically at the
-        * end of each line.  This is useful in case the program dies. 
+        * end of each line.  This is useful in case the program dies.
         */
        if (MyFP != 0) {
 #if HAVE_SETVBUF               /* ANSI */
@@ -141,11 +157,23 @@ trace(const unsigned int tracelevel)
            fclose(MyFP);
            MyFP = 0;
        }
-       _nc_tracing = tracelevel;
+       Locked(_nc_tracing = tracelevel);
     } else if (_nc_tracing != tracelevel) {
-       _nc_tracing = tracelevel;
+       Locked(_nc_tracing = tracelevel);
        _tracef("tracelevel=%#x", tracelevel);
     }
+#else
+    (void) tracelevel;
+    result = 0;
+#endif
+    return result;
+}
+
+#if defined(TRACE)
+NCURSES_EXPORT(void)
+trace(const unsigned int tracelevel)
+{
+    curses_trace(tracelevel);
 }
 
 static void
@@ -196,7 +224,7 @@ _nc_va_tracef(const char *fmt, va_list ap)
 # if USE_WEAK_SYMBOLS
        if ((pthread_self))
 # endif
-#ifdef _WIN32
+#ifdef _NC_WINDOWS
            fprintf(fp, "%#lx:", (long) (intptr_t) pthread_self().p);
 #else
            fprintf(fp, "%#lx:", (long) (intptr_t) pthread_self());
@@ -332,7 +360,7 @@ _nc_fmt_funcptr(char *target, const char *source, size_t size)
        if (ch != 0 || (n + 1) >= size)
            leading = FALSE;
        if (!leading) {
-           _nc_SPRINTF(dst, _nc_SLIMIT(TR_FUNC_LEN - (dst - target))
+           _nc_SPRINTF(dst, _nc_SLIMIT(TR_FUNC_LEN - (size_t) (dst - target))
                        "%02x", ch & 0xff);
            dst += 2;
        }