1 files changed, 244 insertions, 0 deletions
diff --git a/libraries/liblber/stdio.c b/libraries/liblber/stdio.c
new file mode 100644
index 0000000..6550690
--- /dev/null
+++ b/libraries/liblber/stdio.c
@@ -0,0 +1,244 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdarg.h>
+#include <ac/string.h>
+#include <ac/ctype.h>
+#include <lutil.h>
+#include <unistd.h>
+
+#if !defined(HAVE_VSNPRINTF) && !defined(HAVE_EBCDIC)
+/* Write at most n characters to the buffer in str, return the
+ * number of chars written or -1 if the buffer would have been
+ * overflowed.
+ *
+ * This is portable to any POSIX-compliant system. We use pipe()
+ * to create a valid file descriptor, and then fdopen() it to get
+ * a valid FILE pointer. The user's buffer and size are assigned
+ * to the FILE pointer using setvbuf. Then we close the read side
+ * of the pipe to invalidate the descriptor.
+ *
+ * If the write arguments all fit into size n, the write will
+ * return successfully. If the write is too large, the stdio
+ * buffer will need to be flushed to the underlying file descriptor.
+ * The flush will fail because it is attempting to write to a
+ * broken pipe, and the write will be terminated.
+ * -- hyc, 2002-07-19
+ */
+/* This emulation uses vfprintf; on OS/390 we're also emulating
+ * that function so it's more efficient just to have a separate
+ * version of vsnprintf there.
+ */
+#include <ac/signal.h>
+int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
+{
+	int fds[2], res;
+	FILE *f;
+	RETSIGTYPE (*sig)();
+
+	if (pipe( fds )) return -1;
+
+	f = fdopen( fds[1], "w" );
+	if ( !f ) {
+		close( fds[1] );
+		close( fds[0] );
+		return -1;
+	}
+	setvbuf( f, str, _IOFBF, n );
+	sig = signal( SIGPIPE, SIG_IGN );
+	close( fds[0] );
+
+	res = vfprintf( f, fmt, ap );
+
+	fclose( f );
+	signal( SIGPIPE, sig );
+	if ( res > 0 && res < n ) {
+		res = vsprintf( str, fmt, ap );
+	}
+	return res;
+}
+#endif
+
+#ifndef HAVE_SNPRINTF
+int ber_pvt_snprintf( char *str, size_t n, const char *fmt, ... )
+{
+	va_list ap;
+	int res;
+
+	va_start( ap, fmt );
+	res = vsnprintf( str, n, fmt, ap );
+	va_end( ap );
+	return res;
+}
+#endif /* !HAVE_SNPRINTF */
+
+#ifdef HAVE_EBCDIC
+/* stdio replacements with ASCII/EBCDIC translation for OS/390.
+ * The OS/390 port depends on the CONVLIT compiler option being
+ * used to force character and string literals to be compiled in
+ * ISO8859-1, and the __LIBASCII cpp symbol to be defined to use the
+ * OS/390 ASCII-compatibility library. This library only supplies
+ * an ASCII version of sprintf, so other needed functions are
+ * provided here.
+ *
+ * All of the internal character manipulation is done in ASCII,
+ * but file I/O is EBCDIC, so we catch any stdio reading/writing
+ * of files here and do the translations.
+ */
+
+#undef fputs
+#undef fgets
+
+char *ber_pvt_fgets( char *s, int n, FILE *fp )
+{
+	s = (char *)fgets( s, n, fp );
+	if ( s ) __etoa( s );
+	return s;
+}
+
+int ber_pvt_fputs( const char *str, FILE *fp )
+{
+	char buf[8192];
+
+	strncpy( buf, str, sizeof(buf) );
+	__atoe( buf );
+	return fputs( buf, fp );
+}
+
+/* The __LIBASCII doesn't include a working vsprintf, so we make do
+ * using just sprintf. This is a very simplistic parser that looks for
+ * format strings and uses sprintf to process them one at a time.
+ * Literal text is just copied straight to the destination.
+ * The result is appended to the destination string. The parser
+ * recognizes field-width specifiers and the 'l' qualifier; it
+ * may need to be extended to recognize other qualifiers but so
+ * far this seems to be enough.
+ */
+int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
+{
+	char *ptr, *pct, *s2, *f2, *end;
+	char fm2[64];
+	int len, rem;
+
+	ptr = (char *)fmt;
+	s2 = str;
+	fm2[0] = '%';
+	if (n) {
+		end = str + n;
+	} else {
+		end = NULL;
+	}
+
+	for (pct = strchr(ptr, '%'); pct; pct = strchr(ptr, '%')) {
+		len = pct-ptr;
+		if (end) {
+			rem = end-s2;
+			if (rem < 1) return -1;
+			if (rem < len) len = rem;
+		}
+		s2 = lutil_strncopy( s2, ptr, len );
+		/* Did we cheat the length above? If so, bail out */
+		if (len < pct-ptr) return -1;
+		for (pct++, f2 = fm2+1; isdigit(*pct);) *f2++ = *pct++;
+		if (*pct == 'l') *f2++ = *pct++;
+		if (*pct == '%') {
+			*s2++ = '%';
+		} else {
+			*f2++ = *pct;
+			*f2 = '\0';
+			if (*pct == 's') {
+				char *ss = va_arg(ap, char *);
+				/* Attempt to limit sprintf output. This
+				 * may be thrown off if field widths were
+				 * specified for this string.
+				 *
+				 * If it looks like the string is too
+				 * long for the remaining buffer, bypass
+				 * sprintf and just copy what fits, then
+				 * quit.
+				 */
+				if (end && strlen(ss) > (rem=end-s2)) {
+					strncpy(s2, ss, rem);
+					return -1;
+				} else {
+					s2 += sprintf(s2, fm2, ss);
+				}
+			} else {
+				s2 += sprintf(s2, fm2, va_arg(ap, int));
+			}
+		}
+		ptr = pct + 1;
+	}
+	if (end) {
+		rem = end-s2;
+		if (rem > 0) {
+			len = strlen(ptr);
+			s2 = lutil_strncopy( s2, ptr, rem );
+			rem -= len;
+		}
+		if (rem < 0) return -1;
+	} else {
+		s2 = lutil_strcopy( s2, ptr );
+	}
+	return s2 - str;
+}
+
+int ber_pvt_vsprintf( char *str, const char *fmt, va_list ap )
+{
+	return vsnprintf( str, 0, fmt, ap );
+}
+
+/* The fixed buffer size here is a problem, we don't know how
+ * to flush the buffer and keep printing if the msg is too big. 
+ * Hopefully we never try to write something bigger than this
+ * in a log msg...
+ */
+int ber_pvt_vfprintf( FILE *fp, const char *fmt, va_list ap )
+{
+	char buf[8192];
+	int res;
+
+	vsnprintf( buf, sizeof(buf), fmt, ap );
+	__atoe( buf );
+	res = fputs( buf, fp );
+	if (res == EOF) res = -1;
+	return res;
+}
+
+int ber_pvt_printf( const char *fmt, ... )
+{
+	va_list ap;
+	int res;
+
+	va_start( ap, fmt );
+	res = ber_pvt_vfprintf( stdout, fmt, ap );
+	va_end( ap );
+	return res;
+}
+
+int ber_pvt_fprintf( FILE *fp, const char *fmt, ... )
+{
+	va_list ap;
+	int res;
+
+	va_start( ap, fmt );
+	res = ber_pvt_vfprintf( fp, fmt, ap );
+	va_end( ap );
+	return res;
+}
+#endif