Add a "fork" of musl as //fusl.

fusl/include/sys/procfs.h

Index: fusl/include/sys/procfs.h
diff --git a/fusl/include/sys/procfs.h b/fusl/include/sys/procfs.h
new file mode 100644
index 0000000000000000000000000000000000000000..f7936c43233ee9424c654f29add003a1167dd386
--- /dev/null
+++ b/fusl/include/sys/procfs.h
@@ -0,0 +1,65 @@
+#ifndef _SYS_PROCFS_H
+#define _SYS_PROCFS_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/user.h>
+
+struct elf_siginfo {
+	int si_signo;
+	int si_code;
+	int si_errno;
+};
+
+struct elf_prstatus {
+	struct elf_siginfo pr_info;
+	short int pr_cursig;
+	unsigned long int pr_sigpend;
+	unsigned long int pr_sighold;
+	pid_t pr_pid;
+	pid_t pr_ppid;
+	pid_t pr_pgrp;
+	pid_t pr_sid;
+	struct timeval pr_utime;
+	struct timeval pr_stime;
+	struct timeval pr_cutime;
+	struct timeval pr_cstime;
+	elf_gregset_t pr_reg;
+	int pr_fpvalid;
+};
+
+#define ELF_PRARGSZ 80
+
+struct elf_prpsinfo
+	{
+	char pr_state;
+	char pr_sname;
+	char pr_zomb;
+	char pr_nice;
+	unsigned long int pr_flag;
+#if UINTPTR_MAX == 0xffffffff
+	unsigned short int pr_uid;
+	unsigned short int pr_gid;
+#else
+	unsigned int pr_uid;
+	unsigned int pr_gid;
+#endif
+	int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+	char pr_fname[16];
+	char pr_psargs[ELF_PRARGSZ];
+};
+
+typedef void *psaddr_t;
+typedef elf_gregset_t prgregset_t;
+typedef elf_fpregset_t prfpregset_t;
+typedef pid_t lwpid_t;
+typedef struct elf_prstatus prstatus_t;
+typedef struct elf_prpsinfo prpsinfo_t;
+
+#ifdef __cplusplus
+}
+#endif
+#endif