libc: Add POSIX headers & stubs

lib/net/netinet/in.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the BSD netinet/in.h include path expected by Unix-oriented
+ * third-party libraries while reusing nxdk's lwIP socket compatibility layer.
+ */
+
+#include <sys/socket.h>

lib/net/netinet/tcp.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the BSD netinet/tcp.h include path expected by Unix-oriented
+ * third-party libraries while reusing nxdk's lwIP socket compatibility layer.
+ */
+
+#include <sys/socket.h>

lib/xboxrt/libc_extensions/conio.h

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the tiny conio.h subset that some cross-built utility code expects.
+ * The Xbox runtime does not provide a console keyboard in these call sites, so
+ * the helpers intentionally report no pending input.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static inline int _kbhit(void)
+{
+    return 0;
+}
+
+static inline int _getch(void)
+{
+    return -1;
+}
+
+static inline int kbhit(void)
+{
+    return _kbhit();
+}
+
+static inline int getch(void)
+{
+    return _getch();
+}
+
+#ifdef __cplusplus
+}
+#endif

lib/xboxrt/libc_extensions/dirent.h

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide a minimal dirent surface for code that is compiled as part of a
+ * third-party build but does not enumerate Xbox directories at runtime.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct dirent {
+    char d_name[256];
+};
+
+typedef struct nxdk_dir_stub DIR;
+
+static inline DIR *opendir(const char *path)
+{
+    (void) path;
+    return 0;
+}
+
+static inline int closedir(DIR *directory)
+{
+    (void) directory;
+    return -1;
+}
+
+static inline struct dirent *readdir(DIR *directory)
+{
+    (void) directory;
+    return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif

lib/xboxrt/libc_extensions/errno_ext_.h

@@ -8,3 +8,7 @@
 #define _PDCLIB_ERRNO_T_DEFINED _PDCLIB_ERRNO_T_DEFINED
 typedef int errno_t;
 #endif
+
+#ifndef EHOSTDOWN
+#define EHOSTDOWN EHOSTUNREACH
+#endif

lib/xboxrt/libc_extensions/fcntl.h

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the subset of fcntl.h constants that nxdk consumers currently need.
+ *
+ * Some libraries only need this header to exist, while others also depend on
+ * the open mode constants below.
+ */
+
+#ifndef O_RDONLY
+#define O_RDONLY 0x0000
+#endif
+#ifndef O_WRONLY
+#define O_WRONLY 0x0001
+#endif
+#ifndef O_RDWR
+#define O_RDWR 0x0002
+#endif
+#ifndef O_ACCMODE
+#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
+#endif
+#ifndef O_CREAT
+#define O_CREAT 0x0100
+#endif
+#ifndef O_EXCL
+#define O_EXCL 0x0200
+#endif
+#ifndef O_TRUNC
+#define O_TRUNC 0x0400
+#endif
+#ifndef O_APPEND
+#define O_APPEND 0x0800
+#endif
+#ifndef O_BINARY
+#define O_BINARY 0x0000
+#endif
+#ifndef O_TEXT
+#define O_TEXT 0x0000
+#endif

lib/xboxrt/libc_extensions/memory.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Older third-party sources may still include memory.h for the standard string
+ * and memory routines. Route that legacy include to string.h.
+ */
+
+#include <string.h>

lib/xboxrt/libc_extensions/poll.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the POSIX poll.h include path expected by Unix-oriented third-party
+ * libraries while reusing nxdk's socket compatibility layer.
+ */
+
+#include <sys/socket.h>

lib/xboxrt/libc_extensions/string_ext_.c

@@ -22,6 +22,37 @@ char *strdup (const char *s)
     return new_s;
 }
 
+char *strtok_r(char *str, const char *delim, char **saveptr)
+{
+    char *token;
+    char *end;
+
+    if (str != NULL) {
+        *saveptr = str;
+    }
+
+    if (*saveptr == NULL) {
+        return NULL;
+    }
+
+    *saveptr += strspn(*saveptr, delim);
+    if (**saveptr == '\0') {
+        *saveptr = NULL;
+        return NULL;
+    }
+
+    token = *saveptr;
+    end = token + strcspn(token, delim);
+    if (*end == '\0') {
+        *saveptr = NULL;
+    } else {
+        *end = '\0';
+        *saveptr = end + 1;
+    }
+
+    return token;
+}
+
 int _strnicmp (const char *s1, const char *s2, size_t n)
 {
     assert(s1);

lib/xboxrt/libc_extensions/string_ext_.h

@@ -7,6 +7,7 @@ extern "C" {
 #endif
 
 char *strdup (const char *s);
+char *strtok_r(char *str, const char *delim, char **saveptr);
 
 static char *_strdup (const char *s)
 {

lib/xboxrt/libc_extensions/sys/ioctl.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the POSIX sys/ioctl.h include path expected by Unix-oriented
+ * third-party libraries while reusing nxdk's socket compatibility layer.
+ */
+
+#include <sys/socket.h>

lib/xboxrt/libc_extensions/sys/resource.h

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the small sys/resource.h subset required by libraries that probe for
+ * process usage statistics during build-time utility code paths.
+ */
+
+#include <stddef.h>
+#include <sys/time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RUSAGE_SELF 0
+
+struct rusage {
+    struct timeval ru_utime;
+    struct timeval ru_stime;
+};
+
+static inline int getrusage(int who, struct rusage *usage)
+{
+    (void) who;
+    if (usage != NULL) {
+        usage->ru_utime.tv_sec = 0;
+        usage->ru_utime.tv_usec = 0;
+        usage->ru_stime.tv_sec = 0;
+        usage->ru_stime.tv_usec = 0;
+    }
+    return -1;
+}
+
+#ifdef __cplusplus
+}
+#endif

lib/xboxrt/libc_extensions/sys/select.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the POSIX sys/select.h include path expected by Unix-oriented
+ * third-party libraries while reusing nxdk's socket compatibility layer.
+ */
+
+#include <sys/socket.h>

lib/xboxrt/libc_extensions/sys/stat.h

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+/*
+ * Provide the limited sys/stat.h surface currently needed by nxdk consumers.
+ *
+ * This keeps the declarations close to the rest of nxdk's libc extension layer
+ * while the underlying file metadata support remains intentionally small.
+ */
+
+#include <sys/types.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef NXDK_DEV_T_DEFINED
+#define NXDK_DEV_T_DEFINED
+typedef unsigned int dev_t;
+#endif
+
+#ifndef NXDK_INO_T_DEFINED
+#define NXDK_INO_T_DEFINED
+typedef unsigned int ino_t;
+#endif
+
+#ifndef NXDK_NLINK_T_DEFINED
+#define NXDK_NLINK_T_DEFINED
+typedef unsigned int nlink_t;
+#endif
+
+#ifndef S_IFMT
+#define S_IFMT 0170000
+#endif
+#ifndef S_IFDIR
+#define S_IFDIR 0040000
+#endif
+#ifndef S_IFCHR
+#define S_IFCHR 0020000
+#endif
+#ifndef S_IFBLK
+#define S_IFBLK 0060000
+#endif
+#ifndef S_IFREG
+#define S_IFREG 0100000
+#endif
+#ifndef S_ISDIR
+#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
+#endif
+#ifndef S_ISREG
+#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
+#endif
+
+struct stat {
+    dev_t st_dev;
+    mode_t st_mode;
+    ino_t st_ino;
+    nlink_t st_nlink;
+    uid_t st_uid;
+    gid_t st_gid;
+    dev_t st_rdev;
+    unsigned int st_size;
+    time_t st_atime;
+    time_t st_mtime;
+    time_t st_ctime;
+};
+
+int fstat(int fd, struct stat *status);
+int stat(const char *path, struct stat *status);
+int _fstat(int fd, struct stat *status);
+int _stat(const char *path, struct stat *status);
+
+#ifdef __cplusplus
+}
+#endif