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/*
* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#ifndef __OS_H__
#define __OS_H__
#include <stdarg.h>
#include <irq_user.h>
#include <longjmp.h>
#include <mm_id.h>
#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
#define OS_TYPE_FILE 1
#define OS_TYPE_DIR 2
#define OS_TYPE_SYMLINK 3
#define OS_TYPE_CHARDEV 4
#define OS_TYPE_BLOCKDEV 5
#define OS_TYPE_FIFO 6
#define OS_TYPE_SOCK 7
/* os_access() flags */
#define OS_ACC_F_OK 0 /* Test for existence. */
#define OS_ACC_X_OK 1 /* Test for execute permission. */
#define OS_ACC_W_OK 2 /* Test for write permission. */
#define OS_ACC_R_OK 4 /* Test for read permission. */
#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
#ifdef CONFIG_64BIT
#define OS_LIB_PATH "/usr/lib64/"
#else
#define OS_LIB_PATH "/usr/lib/"
#endif
/*
* types taken from stat_file() in hostfs_user.c
* (if they are wrong here, they are wrong there...).
*/
struct uml_stat {
int ust_dev; /* device */
unsigned long long ust_ino; /* inode */
int ust_mode; /* protection */
int ust_nlink; /* number of hard links */
int ust_uid; /* user ID of owner */
int ust_gid; /* group ID of owner */
unsigned long long ust_size; /* total size, in bytes */
int ust_blksize; /* blocksize for filesystem I/O */
unsigned long long ust_blocks; /* number of blocks allocated */
unsigned long ust_atime; /* time of last access */
unsigned long ust_mtime; /* time of last modification */
unsigned long ust_ctime; /* time of last change */
};
struct openflags {
unsigned int r : 1;
unsigned int w : 1;
unsigned int s : 1; /* O_SYNC */
unsigned int c : 1; /* O_CREAT */
unsigned int t : 1; /* O_TRUNC */
unsigned int a : 1; /* O_APPEND */
unsigned int e : 1; /* O_EXCL */
unsigned int cl : 1; /* FD_CLOEXEC */
};
#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
.t = 0, .a = 0, .e = 0, .cl = 0 })
static inline struct openflags of_read(struct openflags flags)
{
flags.r = 1;
return flags;
}
static inline struct openflags of_write(struct openflags flags)
{
flags.w = 1;
return flags;
}
static inline struct openflags of_rdwr(struct openflags flags)
{
return of_read(of_write(flags));
}
static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
{
flags.r = r;
flags.w = w;
return flags;
}
static inline struct openflags of_sync(struct openflags flags)
{
flags.s = 1;
return flags;
}
static inline struct openflags of_create(struct openflags flags)
{
flags.c = 1;
return flags;
}
static inline struct openflags of_trunc(struct openflags flags)
{
flags.t = 1;
return flags;
}
static inline struct openflags of_append(struct openflags flags)
{
flags.a = 1;
return flags;
}
static inline struct openflags of_excl(struct openflags flags)
{
flags.e = 1;
return flags;
}
static inline struct openflags of_cloexec(struct openflags flags)
{
flags.cl = 1;
return flags;
}
/* file.c */
extern int os_stat_file(const char *file_name, struct uml_stat *buf);
extern int os_stat_fd(const int fd, struct uml_stat *buf);
extern int os_access(const char *file, int mode);
extern int os_set_exec_close(int fd);
extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
extern int os_get_ifname(int fd, char *namebuf);
extern int os_set_slip(int fd);
extern int os_mode_fd(int fd, int mode);
extern int os_fsync_file(int fd);
extern int os_seek_file(int fd, unsigned long long offset);
extern int os_open_file(const char *file, struct openflags flags, int mode);
extern int os_read_file(int fd, void *buf, int len);
extern int os_write_file(int fd, const void *buf, int count);
extern int os_sync_file(int fd);
extern int os_file_size(const char *file, unsigned long long *size_out);
extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
extern int os_file_modtime(const char *file, unsigned long *modtime);
extern int os_pipe(int *fd, int stream, int close_on_exec);
extern int os_set_fd_async(int fd);
extern int os_clear_fd_async(int fd);
extern int os_set_fd_block(int fd, int blocking);
extern int os_accept_connection(int fd);
extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
extern int os_shutdown_socket(int fd, int r, int w);
extern void os_close_file(int fd);
extern int os_rcv_fd(int fd, int *helper_pid_out);
extern int create_unix_socket(char *file, int len, int close_on_exec);
extern int os_connect_socket(const char *name);
extern int os_file_type(char *file);
extern int os_file_mode(const char *file, struct openflags *mode_out);
extern int os_lock_file(int fd, int excl);
extern void os_flush_stdout(void);
extern int os_stat_filesystem(char *path, long *bsize_out,
long long *blocks_out, long long *bfree_out,
long long *bavail_out, long long *files_out,
long long *ffree_out, void *fsid_out,
int fsid_size, long *namelen_out,
long *spare_out);
extern int os_change_dir(char *dir);
extern int os_fchange_dir(int fd);
extern unsigned os_major(unsigned long long dev);
extern unsigned os_minor(unsigned long long dev);
extern unsigned long long os_makedev(unsigned major, unsigned minor);
/* start_up.c */
extern void os_early_checks(void);
extern void os_check_bugs(void);
extern void check_host_supports_tls(int *supports_tls, int *tls_min);
/* mem.c */
extern int create_mem_file(unsigned long long len);
/* process.c */
extern unsigned long os_process_pc(int pid);
extern int os_process_parent(int pid);
extern void os_alarm_process(int pid);
extern void os_stop_process(int pid);
extern void os_kill_process(int pid, int reap_child);
extern void os_kill_ptraced_process(int pid, int reap_child);
extern int os_getpid(void);
extern int os_getpgrp(void);
extern void init_new_thread_signals(void);
extern int os_map_memory(void *virt, int fd, unsigned long long off,
unsigned long len, int r, int w, int x);
extern int os_protect_memory(void *addr, unsigned long len,
int r, int w, int x);
extern int os_unmap_memory(void *addr, int len);
extern int os_drop_memory(void *addr, int length);
extern int can_drop_memory(void);
extern void os_flush_stdout(void);
extern int os_mincore(void *addr, unsigned long len);
/* execvp.c */
extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
/* helper.c */
extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
extern int run_helper_thread(int (*proc
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