8 files changed, 263 insertions, 0 deletions

diff --git a/lib/libc/include/ctype.h b/lib/libc/include/ctype.h
index 0ff9a43..2a827e3 100644
--- a/lib/libc/include/ctype.h
+++ b/lib/libc/include/ctype.h
@@ -36,6 +36,12 @@
 __BEGIN_DECLS
 
 __always_inline static inline int
+__isascii(int c)
+{
+    return c >= 0 && c <= 127;
+}
+
+__always_inline static inline int
 __tolower(int c)
 {
     return c | 0x20;
@@ -92,4 +98,7 @@ __END_DECLS
 /* Is a space? */
 #define isspace(C) __isspace((C))
 
+/* Is ascii? */
+#define isascii(C) __isascii((C))
+
 #endif  /* _CTYPE_H */
diff --git a/lib/libc/include/unistd.h b/lib/libc/include/unistd.h
index 21206ad..40ebee2 100644
--- a/lib/libc/include/unistd.h
+++ b/lib/libc/include/unistd.h
@@ -53,15 +53,28 @@ int sethostname(const char *name, size_t size);
 uid_t getuid(void);
 char *getlogin(void);
 
+char *getcwd(char *buf, size_t size);
+char *getwd(char *pathname);
+
+int symlink(const char *target, const char *linkpath);
+int synlinkat(const char *target, int newdirfd, const char *linkpath);
+
 ssize_t read(int fd, void *buf, size_t count);
 ssize_t write(int fd, const void *buf, size_t count);
 
 int close(int fd);
 int access(const char *path, int mode);
+
 off_t lseek(int fildes, off_t offset, int whence);
+int unlinkat(int dirfd, const char *pathname, int flags);
+int unlink(const char *path);
+
+int dup(int fd);
+int dup2(int fd, int fd1);
 
 pid_t getpid(void);
 pid_t getppid(void);
+pid_t fork(void);
 
 extern char *optarg;
 extern int optind, opterr, optopt;
diff --git a/lib/libc/src/stdio/fopen.c b/lib/libc/src/stdio/fopen.c
index c15dace..efeb577 100644
--- a/lib/libc/src/stdio/fopen.c
+++ b/lib/libc/src/stdio/fopen.c
@@ -51,6 +51,8 @@ fopen(const char *__restrict path, const char *__restrict mode)
         seal |= (O_WRONLY | O_CREAT);
     } else if (strcmp(mode, "r+") == 0) {
         seal |= O_RDWR;
+    } else if (strcmp(mode, "rb") == 0) {
+        seal |= O_RDONLY;
     } else {
         return NULL;
     }
diff --git a/lib/libc/src/unistd/dup.c b/lib/libc/src/unistd/dup.c
new file mode 100644
index 0000000..887fdc6
--- /dev/null
+++ b/lib/libc/src/unistd/dup.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+
+int
+dup(int fd)
+{
+    /* TODO: STUB */
+    return -1;
+}
+
+int
+dup2(int fd, int fd1)
+{
+    /* TODO: STUB */
+    return -1;
+}
diff --git a/lib/libc/src/unistd/fork.c b/lib/libc/src/unistd/fork.c
new file mode 100644
index 0000000..970072e
--- /dev/null
+++ b/lib/libc/src/unistd/fork.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+
+pid_t
+fork(void)
+{
+    /* TODO */
+    return -1;
+}
diff --git a/lib/libc/src/unistd/getcwd.c b/lib/libc/src/unistd/getcwd.c
new file mode 100644
index 0000000..641a49b
--- /dev/null
+++ b/lib/libc/src/unistd/getcwd.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+
+char *
+getcwd(char *buf, size_t size)
+{
+    if (buf == NULL) {
+        return NULL;
+    }
+
+    /* TODO: STUB */
+    return NULL;
+}
+
+char *
+getwd(char *pathname)
+{
+    if (pathname == NULL) {
+        return NULL;
+    }
+
+    /* TODO: STUB */
+    return NULL;
+}
diff --git a/lib/libc/src/unistd/symlink.c b/lib/libc/src/unistd/symlink.c
new file mode 100644
index 0000000..2ad24ca
--- /dev/null
+++ b/lib/libc/src/unistd/symlink.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/errno.h>
+#include <unistd.h>
+
+int
+symlink(const char *target, const char *linkpath)
+{
+    if (target == NULL || linkpath == NULL) {
+        return -EINVAL;
+    }
+
+    /* TODO: STUB */
+    return -1;
+}
+
+int
+synlinkat(const char *target, int newdirfd, const char *linkpath)
+{
+    if (target == NULL || linkpath == NULL) {
+        return -EINVAL;
+    }
+
+    /* TODO: STUB */
+    return -1;
+}
diff --git a/lib/libc/src/unistd/unlink.c b/lib/libc/src/unistd/unlink.c
new file mode 100644
index 0000000..3de0796
--- /dev/null
+++ b/lib/libc/src/unistd/unlink.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/errno.h>
+#include <unistd.h>
+
+int
+unlink(const char *path)
+{
+    if (path == NULL) {
+        return -EINVAL;
+    }
+
+    /* TODO: STUB */
+    return -1;
+}
+
+int
+unlinkat(int dirfd, const char *pathname, int flags)
+{
+    if (pathname == NULL || dirfd < 0) {
+        return -EINVAL;
+    }
+
+    /* TODO: STUB */
+    return -1;
+}