Implement POSIX support for Linux for the following facilities:

- fnmatch
- grp
- langinfo
- locale

5 files changed, 260 insertions, 5 deletions

diff --git a/core/sys/posix/fnmatch.odin b/core/sys/posix/fnmatch.odin
index 9e54972e7..1326ce9e4 100644
--- a/core/sys/posix/fnmatch.odin
+++ b/core/sys/posix/fnmatch.odin
@@ -53,6 +53,14 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 	FNM_PERIOD   :: 0x04
 	FNM_NOESCAPE :: 0x01
 
+} else when ODIN_OS == .Linux {
+
+	FNM_NOMATCH  :: 1
+
+	FNM_PATHNAME :: 0x01
+	FNM_NOESCAPE :: 0x02
+	FNM_PERIOD   :: 0x04
+
 } else {
 	#panic("posix is unimplemented for the current target")
 }
diff --git a/core/sys/posix/glob.odin b/core/sys/posix/glob.odin
index 4f41d83db..b09104900 100644
--- a/core/sys/posix/glob.odin
+++ b/core/sys/posix/glob.odin
@@ -112,7 +112,7 @@ when ODIN_OS == .Darwin {
 
 	glob_t :: struct {
 		gl_pathc:  c.size_t,                      /* [PSX] count of paths matched by pattern */
-		gl_matchc: c.size_t,                         /* count of paths matching pattern */
+		gl_matchc: c.size_t,                      /* count of paths matching pattern */
 		gl_offs:   c.size_t,                      /* [PSX] slots to reserve at the beginning of gl_pathv */
 		gl_flags:  Glob_Flags,                    /* copy of flags parameter to glob */
 		gl_pathv:  [^]cstring `fmt:"v,gl_pathc"`, /* [PSX] pointer to list of matched pathnames */
@@ -144,7 +144,7 @@ when ODIN_OS == .Darwin {
 
 	glob_t :: struct {
 		gl_pathc:  c.size_t,                      /* [PSX] count of paths matched by pattern */
-		gl_matchc: c.size_t,                         /* count of paths matching pattern */
+		gl_matchc: c.size_t,                      /* count of paths matching pattern */
 		gl_offs:   c.size_t,                      /* [PSX] slots to reserve at the beginning of gl_pathv */
 		gl_flags:  Glob_Flags,                    /* copy of flags parameter to glob */
 		gl_pathv:  [^]cstring `fmt:"v,gl_pathc"`, /* [PSX] pointer to list of matched pathnames */
@@ -174,6 +174,38 @@ when ODIN_OS == .Darwin {
 	GLOB_NOMATCH :: -3
 	GLOB_NOSPACE :: -1
 
+} else when ODIN_OS == .Linux {
+
+	glob_t :: struct {
+		gl_pathc:  c.size_t,                      /* [PSX] count of paths matched by pattern */
+		gl_matchc: c.size_t,                      /* count of paths matching pattern */
+		gl_offs:   c.size_t,                      /* [PSX] slots to reserve at the beginning of gl_pathv */
+		gl_flags:  Glob_Flags,                    /* copy of flags parameter to glob */
+		gl_pathv:  [^]cstring `fmt:"v,gl_pathc"`, /* [PSX] pointer to list of matched pathnames */
+
+		// Non-standard alternate file system access functions:
+
+		gl_errfunc:  proc "c" (cstring, c.int) -> c.int,
+
+		gl_closedir: proc "c" (dirp: DIR),
+		gl_readdir:  proc "c" (dirp: DIR) -> ^dirent,
+		gl_opendir:  proc "c" (path: cstring) -> DIR,
+		gl_lstat:    proc "c" (path: cstring, buf: ^stat_t) -> result,
+		gl_stat:     proc "c" (path: cstring, buf: ^stat_t) -> result,
+	}
+
+	GLOB_ERR      :: 1 << 0
+	GLOB_MARK     :: 1 << 1
+	GLOB_NOSORT   :: 1 << 2
+	GLOB_DOOFFS   :: 1 << 3
+	GLOB_NOCHECK  :: 1 << 4
+	GLOB_APPEND   :: 1 << 5
+	GLOB_NOESCAPE :: 1 << 6
+
+	GLOB_NOSPACE :: 1
+	GLOB_ABORTED :: 2
+	GLOB_NOMATCH :: 3
+
 } else {
 	#panic("posix is unimplemented for the current target")
 }
diff --git a/core/sys/posix/grp.odin b/core/sys/posix/grp.odin
index c8a39de6a..3a78e2c4c 100644
--- a/core/sys/posix/grp.odin
+++ b/core/sys/posix/grp.odin
@@ -114,7 +114,7 @@ foreign lib {
 	getgrnam_r :: proc(name: cstring, grp: ^group, buffer: [^]byte, bufsize: c.size_t, result: ^^group) -> Errno ---
 }
 
-when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD {
+when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD || ODIN_OS == .Linux {
 
 	gid_t :: distinct c.uint32_t
 
diff --git a/core/sys/posix/langinfo.odin b/core/sys/posix/langinfo.odin
index 24ecc917a..ffb83730c 100644
--- a/core/sys/posix/langinfo.odin
+++ b/core/sys/posix/langinfo.odin
@@ -238,7 +238,7 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD {
 	ABDAY_4 :: 16
 	ABDAY_5 :: 17
 	ABDAY_6 :: 18
-	ABDAY_7 :: 19
+	ABDAY_7 :: 19	
 
 	MON_1  :: 20
 	MON_2  :: 21
@@ -278,7 +278,184 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD {
 	YESEXPR :: 47
 	NOEXPR  :: 49
 
-	CRNCYSTR :: 50
+	CRNCYSTR :: 50	
+
+} else when ODIN_OS == .Linux {
+
+	@(private="file")
+	nl_item :: proc(flag: int) -> int {
+		return flag << 16
+	}
+
+	@(private="file")
+	_langinfo_values :: enum {
+		ABDAY_1 = nl_item(LC_TIME),
+		ABDAY_2,
+		ABDAY_3,
+		ABDAY_4,
+		ABDAY_5,
+		ABDAY_6,
+		ABDAY_7,
+
+		DAY_1,
+		DAY_2,
+		DAY_3,
+		DAY_4,
+		DAY_5,
+		DAY_6,
+		DAY_7,
+
+		ABMON_1,
+		ABMON_2,
+		ABMON_3,
+		ABMON_4,
+		ABMON_5,
+		ABMON_6,
+		ABMON_7,
+		ABMON_8,
+		ABMON_9,
+		ABMON_10,
+		ABMON_11,
+		ABMON_12,
+
+		MON_1,
+		MON_2,
+		MON_3,
+		MON_4,
+		MON_5,
+		MON_6,
+		MON_7,
+		MON_8,
+		MON_9,
+		MON_10,
+		MON_11,
+		MON_12,
+
+		AM_STR,
+		PM_STR,
+
+		D_T_FMT,
+		D_FMT,
+		T_FMT,
+		T_FMT_AMPM,
+
+		ERA,
+		_,
+		ERA_D_FMT,
+		ALT_DIGITS,
+		ERA_D_T_FMT,
+		ERA_T_FMT,
+
+		// These values are defined only to make sure CODESET below gets the correct value.
+		_NL_CTYPE_CLASS = nl_item(LC_CTYPE),
+		_NL_CTYPE_TOUPPER,
+		_NL_CTYPE_GAP1,
+		_NL_CTYPE_TOLOWER,
+		_NL_CTYPE_GAP2,
+		_NL_CTYPE_CLASS32,
+		_NL_CTYPE_GAP3,
+		_NL_CTYPE_GAP4,
+		_NL_CTYPE_GAP5,
+		_NL_CTYPE_GAP6,
+		_NL_CTYPE_CLASS_NAMES,
+		_NL_CTYPE_MAP_NAMES,
+		_NL_CTYPE_WIDTH,
+		_NL_CTYPE_MB_CUR_MAX,
+		CODESET,
+
+		// These values are defined only to make sure CRNCYSTR below gets the correct value.
+		__INT_CURR_SYMBOL = nl_item(LC_MONETARY),
+		__CURRENCY_SYMBOL,
+		__MON_DECIMAL_POINT,
+		__MON_THOUSANDS_SEP,
+		__MON_GROUPING,
+		__POSITIVE_SIGN,
+		__NEGATIVE_SIGN,
+		__INT_FRAC_DIGITS,
+		__FRAC_DIGITS,
+		__P_CS_PRECEDES,
+		__P_SEP_BY_SPACE,
+		__N_CS_PRECEDES,
+		__N_SEP_BY_SPACE,
+		__P_SIGN_POSN,
+		__N_SIGN_POSN,
+		CRNCYSTR,
+
+		RADIXCHAR = nl_item(LC_NUMERIC),
+		THOUSEP,
+
+		YESEXPR = nl_item(LC_MESSAGES),
+		NOEXPR,
+	}
+
+// NOTE: declared with `_t` so we can enumerate the real `nl_info`.
+	nl_item_t :: distinct c.int
+
+	ABDAY_1 :: _langinfo_values.ABDAY_1
+	ABDAY_2 :: _langinfo_values.ABDAY_2
+	ABDAY_3 :: _langinfo_values.ABDAY_3
+	ABDAY_4 :: _langinfo_values.ABDAY_4
+	ABDAY_5 :: _langinfo_values.ABDAY_5
+	ABDAY_6 :: _langinfo_values.ABDAY_6
+	ABDAY_7 :: _langinfo_values.ABDAY_7
+
+	DAY_1 :: _langinfo_values.DAY_1
+	DAY_2 :: _langinfo_values.DAY_2
+	DAY_3 :: _langinfo_values.DAY_3
+	DAY_4 :: _langinfo_values.DAY_4
+	DAY_5 :: _langinfo_values.DAY_5
+	DAY_6 :: _langinfo_values.DAY_6
+	DAY_7 :: _langinfo_values.DAY_7
+
+	ABMON_1 :: _langinfo_values.ABMON_1
+	ABMON_2 :: _langinfo_values.ABMON_2
+	ABMON_3 :: _langinfo_values.ABMON_3
+	ABMON_4 :: _langinfo_values.ABMON_4
+	ABMON_5 :: _langinfo_values.ABMON_5
+	ABMON_6 :: _langinfo_values.ABMON_6
+	ABMON_7 :: _langinfo_values.ABMON_7
+	ABMON_8 :: _langinfo_values.ABMON_8
+	ABMON_9 :: _langinfo_values.ABMON_9
+	ABMON_10 :: _langinfo_values.ABMON_10
+	ABMON_11 :: _langinfo_values.ABMON_11
+	ABMON_12 :: _langinfo_values.ABMON_12
+
+	MON_1 :: _langinfo_values.MON_1
+	MON_2 :: _langinfo_values.MON_2
+	MON_3 :: _langinfo_values.MON_3
+	MON_4 :: _langinfo_values.MON_4
+	MON_5 :: _langinfo_values.MON_5
+	MON_6 :: _langinfo_values.MON_6
+	MON_7 :: _langinfo_values.MON_7
+	MON_8 :: _langinfo_values.MON_8
+	MON_9 :: _langinfo_values.MON_9
+	MON_10 :: _langinfo_values.MON_10
+	MON_11 :: _langinfo_values.MON_11
+	MON_12 :: _langinfo_values.MON_12
+
+	AM_STR :: _langinfo_values.AM_STR
+	PM_STR :: _langinfo_values.PM_STR
+
+	D_T_FMT :: _langinfo_values.D_T_FMT
+	D_FMT :: _langinfo_values.D_FMT
+	T_FMT :: _langinfo_values.T_FMT
+	T_FMT_AMPM :: _langinfo_values.T_FMT_AMPM
+
+	ERA :: _langinfo_values.ERA
+	ERA_D_FMT :: _langinfo_values.ERA_D_FMT
+	ALT_DIGITS :: _langinfo_values.ALT_DIGITS
+	ERA_D_T_FMT :: _langinfo_values.ERA_D_T_FMT
+	ERA_T_FMT :: _langinfo_values.ERA_T_FMT
+
+	CODESET :: _langinfo_values.CODESET
+
+	CRNCYSTR :: _langinfo_values.CRNCYSTR
+
+	RADIXCHAR :: _langinfo_values.RADIXCHAR
+	THOUSEP :: _langinfo_values.THOUSEP
+
+	YESEXP :: _langinfo_values.YESEXP
+	NOEXPR :: _langinfo_values.NOEXPR
 
 } else {
 	#panic("posix is unimplemented for the current target")
diff --git a/core/sys/posix/locale.odin b/core/sys/posix/locale.odin
index 1f2a336b5..fae692bcb 100644
--- a/core/sys/posix/locale.odin
+++ b/core/sys/posix/locale.odin
@@ -88,6 +88,44 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD  || ODIN_OS
 	LC_NUMERIC  :: 4
 	LC_TIME     :: 5
 
+} else when ODIN_OS == .Linux {
+
+	// NOTE: All of these fields are standard ([PSX]).
+	lconv :: struct {
+		decimal_point:      cstring,
+		thousand_sep:       cstring,
+		grouping:           cstring,
+		int_curr_symbol:    cstring,
+		currency_symbol:    cstring,
+		mon_decimal_points: cstring,
+		mon_thousands_sep:  cstring,
+		mon_grouping:       cstring,
+		positive_sign:      cstring,
+		negative_sign:      cstring,
+		int_frac_digits:    c.char,
+		frac_digits:        c.char,
+		p_cs_precedes:      c.char,
+		p_sep_by_space:     c.char,
+		n_cs_precedes:      c.char,
+		n_sep_by_space:     c.char,
+		p_sign_posn:        c.char,
+		n_sign_posn:        c.char,
+		int_p_cs_precedes:  c.char,
+		int_n_cs_precedes:  c.char,
+		int_p_sep_by_space: c.char,
+		int_n_sep_by_space: c.char,
+		int_p_sign_posn:    c.char,
+		int_n_sign_posn:    c.char,
+	}
+
+	LC_CTYPE    :: 0
+	LC_NUMERIC  :: 1
+	LC_TIME     :: 2
+	LC_COLLATE  :: 3
+	LC_MONETARY :: 4
+	LC_MESSAGES :: 5
+	LC_ALL      :: 6
+
 } else {
 	#panic("posix is unimplemented for the current target")
 }