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authorAlan Coopersmith <alan.coopersmith@oracle.com>2019-08-03 16:05:21 -0700
committerAlan Coopersmith <alan.coopersmith@oracle.com>2019-08-03 17:12:12 -0700
commitd4c941ea8b1dc07a14efce656bff58d31a14c985 (patch)
treeaf8719ef39f2dd8da39c55a84f628c186416c97a
parentc4ed2e069dc8aa5b8b7ef2fc926ae8584ff2a67b (diff)
Add strlcat & strlcpy fallbacks if not provided by libc nor libbsd
Implementations copied from the Xserver Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
-rw-r--r--Makefile.am2
-rw-r--r--configure.ac3
-rw-r--r--src/util/replace.h47
-rw-r--r--src/util/strlcat.c58
-rw-r--r--src/util/strlcpy.c53
5 files changed, 162 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am
index a4a8009..393d09e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -65,7 +65,7 @@ libXfont2_la_SOURCES = \
libXfont2_la_LDFLAGS = -version-number 2:0:0 -no-undefined
-libXfont2_la_LIBADD = $(Z_LIBS) $(MATH_LIBS) $(XFONT_LIBS)
+libXfont2_la_LIBADD = $(Z_LIBS) $(MATH_LIBS) $(XFONT_LIBS) $(LTLIBOBJS)
if XFONT_FONTFILE
libXfont2_la_SOURCES += \
diff --git a/configure.ac b/configure.ac
index 9df20cb..970d9a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,6 +52,9 @@ AC_CHECK_HEADERS([endian.h poll.h sys/poll.h])
# Checks for library functions.
AC_CHECK_FUNCS([poll readlink])
+AC_SEARCH_LIBS([strlcat], [bsd])
+AC_CONFIG_LIBOBJ_DIR([src/util])
+AC_REPLACE_FUNCS([strlcat strlcpy])
# If the first PKG_CHECK_MODULES appears inside a conditional, pkg-config
# must first be located explicitly.
diff --git a/src/util/replace.h b/src/util/replace.h
new file mode 100644
index 0000000..96ad001
--- /dev/null
+++ b/src/util/replace.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/* Local replacements for functions found in some, but not all, libc's */
+#ifndef XFONT_REPLACE_H
+#define XFONT_REPLACE_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <X11/Xfuncproto.h>
+
+#include <string.h>
+#if defined(HAVE_LIBBSD) && defined(HAVE_STRLCPY)
+#include <bsd/string.h> /* for strlcpy, strlcat */
+#endif
+
+#ifndef HAVE_STRLCPY
+extern _X_HIDDEN size_t
+strlcpy(char *dst, const char *src, size_t siz);
+extern _X_HIDDEN size_t
+strlcat(char *dst, const char *src, size_t siz);
+#endif
+
+
+#endif /* XFONT_REPLACE_H */
diff --git a/src/util/strlcat.c b/src/util/strlcat.c
new file mode 100644
index 0000000..daa43c9
--- /dev/null
+++ b/src/util/strlcat.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
+ * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <string.h>
+#include "src/util/replace.h"
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left). At most siz-1 characters
+ * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+ register char *d = dst;
+ register const char *s = src;
+ register size_t n = siz;
+ size_t dlen;
+
+ /* Find the end of dst and adjust bytes left but don't go past end */
+ while (n-- != 0 && *d != '\0')
+ d++;
+ dlen = d - dst;
+ n = siz - dlen;
+
+ if (n == 0)
+ return (dlen + strlen(s));
+ while (*s != '\0') {
+ if (n != 1) {
+ *d++ = *s;
+ n--;
+ }
+ s++;
+ }
+ *d = '\0';
+
+ return (dlen + (s - src)); /* count does not include NUL */
+}
diff --git a/src/util/strlcpy.c b/src/util/strlcpy.c
new file mode 100644
index 0000000..ec7dd40
--- /dev/null
+++ b/src/util/strlcpy.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
+ * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <string.h>
+#include "src/util/replace.h"
+
+/*
+ * Copy src to string dst of size siz. At most siz-1 characters
+ * will be copied. Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+ register char *d = dst;
+ register const char *s = src;
+ register size_t n = siz;
+
+ /* Copy as many bytes as will fit */
+ if (n != 0 && --n != 0) {
+ do {
+ if ((*d++ = *s++) == 0)
+ break;
+ } while (--n != 0);
+ }
+
+ /* Not enough room in dst, add NUL and traverse rest of src */
+ if (n == 0) {
+ if (siz != 0)
+ *d = '\0'; /* NUL-terminate dst */
+ while (*s++);
+ }
+
+ return s - src - 1; /* count does not include NUL */
+}