Initial FTS support (#522)

Close #520

Add FTS implementation derived from musl-fts with a few modifications.
The compiled fts.o is included in the libc.a archive, and the fts.h
header is installed in the sysroot (`include/fts.h`).

* fts/musl-fts: Add a copy of the musl-fts sources with modifications.
* fts/patches: A set of patches to apply to the musl-fts sources.
* Upstream pull request: void-linux/musl-fts#14
* fts/update-musl-fts.sh: A script to update the musl-fts sources with
the patches applied.
* fts/config.h: A configuration header included by the musl-fts sources.
* test/smoke: Add a test suite for wasi-libc specific features that
libc-test does not cover.

Author: kateinoigakukun

LICENSE

@@ -10,6 +10,7 @@ dlmalloc/                     - CC0; see the notice in malloc.c for details
 emmalloc/                     - MIT; see the notice in emmalloc.c for details
 libc-bottom-half/cloudlibc/   - BSD-2-Clause; see the LICENSE file for details
 libc-top-half/musl/           - MIT; see the COPYRIGHT file for details
+fts/musl-fts/                 - BSD-3-Clause; see the COPYING file for details
 
 wasi-libc's changes to these files are multi-licensed under the
 Apache License v2.0 with LLVM Exceptions, the Apache License v2.0,

Makefile

@@ -384,6 +384,10 @@ LIBC_TOP_HALF_ALL_SOURCES = \
     $(LIBC_TOP_HALF_MUSL_SOURCES) \
     $(sort $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.[cs]))
 
+FTS_SRC_DIR = fts
+MUSL_FTS_SRC_DIR = $(FTS_SRC_DIR)/musl-fts
+FTS_SOURCES = $(MUSL_FTS_SRC_DIR)/fts.c
+
 # Add any extra flags
 CFLAGS = $(EXTRA_CFLAGS)
 # Set the target.
@@ -457,6 +461,7 @@ DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES))
 EMMALLOC_OBJS = $(call objs,$(EMMALLOC_SOURCES))
 LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES))
 LIBC_TOP_HALF_ALL_OBJS = $(call asmobjs,$(call objs,$(LIBC_TOP_HALF_ALL_SOURCES)))
+FTS_OBJS = $(call objs,$(FTS_SOURCES))
 ifeq ($(WASI_SNAPSHOT), p2)
 LIBC_OBJS += $(OBJDIR)/wasip2_component_type.o
 endif
@@ -475,6 +480,7 @@ ifeq ($(BUILD_LIBC_TOP_HALF),yes)
 # libc-top-half is musl.
 LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS)
 endif
+LIBC_OBJS += $(FTS_OBJS)
 MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
 MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
 MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
@@ -756,6 +762,10 @@ $(LIBC_TOP_HALF_ALL_OBJS) $(LIBC_TOP_HALF_ALL_SO_OBJS) $(MUSL_PRINTSCAN_LONG_DOU
     -Wno-dangling-else \
     -Wno-unknown-pragmas
 
+$(FTS_OBJS): CFLAGS += \
+    -I$(MUSL_FTS_SRC_DIR) \
+    -I$(FTS_SRC_DIR) # for config.h
+
 $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS) $(LIBWASI_EMULATED_PROCESS_CLOCKS_SO_OBJS): CFLAGS += \
     -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)
 
@@ -784,6 +794,8 @@ include_dirs:
 	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits"
 	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits"
 
+	cp "$(MUSL_FTS_SRC_DIR)/fts.h" "$(SYSROOT_INC)/fts.h"
+
 	# Remove selected header files.
 	$(RM) $(patsubst %,$(SYSROOT_INC)/%,$(MUSL_OMIT_HEADERS))
 ifeq ($(WASI_SNAPSHOT), p2)

expected/wasm32-wasip1-threads/defined-symbols.txt

@@ -714,6 +714,11 @@ ftello64
 ftime
 ftruncate
 ftrylockfile
+fts_children
+fts_close
+fts_open
+fts_read
+fts_set
 funlockfile
 futimens
 futimesat

expected/wasm32-wasip1-threads/include-all.c

@@ -86,6 +86,7 @@
 #include <float.h>
 #include <fmtmsg.h>
 #include <fnmatch.h>
+#include <fts.h>
 #include <ftw.h>
 #include <getopt.h>
 #include <glob.h>

expected/wasm32-wasip1-threads/predefined-macros.txt

@@ -384,6 +384,40 @@
 #define FSETLOCKING_BYCALLER 2
 #define FSETLOCKING_INTERNAL 1
 #define FSETLOCKING_QUERY 0
+#define FTS_AGAIN 1
+#define FTS_COMFOLLOW 0x001
+#define FTS_D 1
+#define FTS_DC 2
+#define FTS_DEFAULT 3
+#define FTS_DNR 4
+#define FTS_DONTCHDIR 0x01
+#define FTS_DOT 5
+#define FTS_DP 6
+#define FTS_ERR 7
+#define FTS_F 8
+#define FTS_FOLLOW 2
+#define FTS_INIT 9
+#define FTS_ISW 0x04
+#define FTS_LOGICAL 0x002
+#define FTS_NAMEONLY 0x100
+#define FTS_NOCHDIR 0x004
+#define FTS_NOINSTR 3
+#define FTS_NOSTAT 0x008
+#define FTS_NS 10
+#define FTS_NSOK 11
+#define FTS_OPTIONMASK 0x0ff
+#define FTS_PHYSICAL 0x010
+#define FTS_ROOTLEVEL 0
+#define FTS_ROOTPARENTLEVEL -1
+#define FTS_SEEDOT 0x020
+#define FTS_SKIP 4
+#define FTS_SL 12
+#define FTS_SLNONE 13
+#define FTS_STOP 0x200
+#define FTS_SYMFOLLOW 0x02
+#define FTS_W 14
+#define FTS_WHITEOUT 0x080
+#define FTS_XDEV 0x040
 #define FTW_CHDIR 4
 #define FTW_D 2
 #define FTW_DEPTH 8
@@ -2075,6 +2109,7 @@
 #define _FLOAT_H 
 #define _FMTMSG_H 
 #define _FNMATCH_H 
+#define _FTS_H_ 
 #define _FTW_H 
 #define _GETOPT_H 
 #define _GLOB_H 
@@ -3031,6 +3066,13 @@
 #define __alignof_is_defined 1
 #define __bitop(x,i,o) ((x)[(i)/8] o (1<<(i)%8))
 #define __bool_true_false_are_defined 1
+#define __fts_dev_t dev_t
+#define __fts_ino_t ino_t
+#define __fts_length_t unsigned int
+#define __fts_level_t int
+#define __fts_nlink_t nlink_t
+#define __fts_number_t int64_t
+#define __fts_stat_t struct stat
 #define __inline inline
 #define __restrict restrict
 #define __tg_complex(fun,x) (__RETCAST_CX(x)( __FLTCX((x)+I) && __IS_FP(x) ? fun ## f (x) : __LDBLCX((x)+I) ? fun ## l (x) : fun(x) ))

expected/wasm32-wasip1/defined-symbols.txt

@@ -648,6 +648,11 @@ ftello
 ftello64
 ftime
 ftruncate
+fts_children
+fts_close
+fts_open
+fts_read
+fts_set
 futimens
 futimesat
 fwide

expected/wasm32-wasip1/include-all.c

@@ -86,6 +86,7 @@
 #include <float.h>
 #include <fmtmsg.h>
 #include <fnmatch.h>
+#include <fts.h>
 #include <ftw.h>
 #include <getopt.h>
 #include <glob.h>

expected/wasm32-wasip1/predefined-macros.txt

@@ -384,6 +384,40 @@
 #define FSETLOCKING_BYCALLER 2
 #define FSETLOCKING_INTERNAL 1
 #define FSETLOCKING_QUERY 0
+#define FTS_AGAIN 1
+#define FTS_COMFOLLOW 0x001
+#define FTS_D 1
+#define FTS_DC 2
+#define FTS_DEFAULT 3
+#define FTS_DNR 4
+#define FTS_DONTCHDIR 0x01
+#define FTS_DOT 5
+#define FTS_DP 6
+#define FTS_ERR 7
+#define FTS_F 8
+#define FTS_FOLLOW 2
+#define FTS_INIT 9
+#define FTS_ISW 0x04
+#define FTS_LOGICAL 0x002
+#define FTS_NAMEONLY 0x100
+#define FTS_NOCHDIR 0x004
+#define FTS_NOINSTR 3
+#define FTS_NOSTAT 0x008
+#define FTS_NS 10
+#define FTS_NSOK 11
+#define FTS_OPTIONMASK 0x0ff
+#define FTS_PHYSICAL 0x010
+#define FTS_ROOTLEVEL 0
+#define FTS_ROOTPARENTLEVEL -1
+#define FTS_SEEDOT 0x020
+#define FTS_SKIP 4
+#define FTS_SL 12
+#define FTS_SLNONE 13
+#define FTS_STOP 0x200
+#define FTS_SYMFOLLOW 0x02
+#define FTS_W 14
+#define FTS_WHITEOUT 0x080
+#define FTS_XDEV 0x040
 #define FTW_CHDIR 4
 #define FTW_D 2
 #define FTW_DEPTH 8
@@ -2070,6 +2104,7 @@
 #define _FLOAT_H 
 #define _FMTMSG_H 
 #define _FNMATCH_H 
+#define _FTS_H_ 
 #define _FTW_H 
 #define _GETOPT_H 
 #define _GLOB_H 
@@ -3021,6 +3056,13 @@
 #define __alignof_is_defined 1
 #define __bitop(x,i,o) ((x)[(i)/8] o (1<<(i)%8))
 #define __bool_true_false_are_defined 1
+#define __fts_dev_t dev_t
+#define __fts_ino_t ino_t
+#define __fts_length_t unsigned int
+#define __fts_level_t int
+#define __fts_nlink_t nlink_t
+#define __fts_number_t int64_t
+#define __fts_stat_t struct stat
 #define __inline inline
 #define __restrict restrict
 #define __tg_complex(fun,x) (__RETCAST_CX(x)( __FLTCX((x)+I) && __IS_FP(x) ? fun ## f (x) : __LDBLCX((x)+I) ? fun ## l (x) : fun(x) ))

expected/wasm32-wasip2/defined-symbols.txt

@@ -736,6 +736,11 @@ ftello
 ftello64
 ftime
 ftruncate
+fts_children
+fts_close
+fts_open
+fts_read
+fts_set
 futimens
 futimesat
 fwide

expected/wasm32-wasip2/include-all.c

@@ -86,6 +86,7 @@
 #include <float.h>
 #include <fmtmsg.h>
 #include <fnmatch.h>
+#include <fts.h>
 #include <ftw.h>
 #include <getopt.h>
 #include <glob.h>