7 #include <linux/unistd.h>
10 #define __NR_sys_splice 313
11 #define __NR_sys_tee 315
12 #define __NR_sys_vmsplice 316
13 #elif defined(__x86_64__)
14 #define __NR_sys_splice 275
15 #define __NR_sys_tee 276
16 #define __NR_sys_vmsplice 278
17 #elif defined(__powerpc__) || defined(__powerpc64__)
18 #define __NR_sys_splice 283
19 #define __NR_sys_tee 284
20 #define __NR_sys_vmsplice 285
21 #elif defined(__ia64__)
22 #define __NR_sys_splice 1297
23 #define __NR_sys_tee 1301
24 #define __NR_sys_vmsplice 1302
26 #error unsupported arch
31 #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
32 #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
33 /* we may still block on the fd we splice */
34 /* from/to, of course */
35 #define SPLICE_F_MORE (0x04) /* expect more data */
36 #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
38 #endif /* SPLICE_F_MOVE defined */
41 * SPLICE_F_UNMAP was introduced later, so check for that seperately
43 #ifndef SPLICE_F_UNMAP
44 #define SPLICE_F_UNMAP (0x10) /* undo vmsplice map */
47 static inline int ssplice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
48 size_t len, unsigned int flags)
51 return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
54 static inline int stee(int fdin, int fdout, size_t len, unsigned int flags)
56 return syscall(__NR_sys_tee, fdin, fdout, len, flags);
59 static inline int svmsplice(int fd, const struct iovec *iov,
60 unsigned long nr_segs, unsigned int flags)
62 return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
65 #define SPLICE_SIZE (64*1024)
67 #define BUG_ON(c) assert(!(c))
72 (void) (&_x == &_y); \
78 (void) (&_x == &_y); \
81 static inline int error(const char *n)
87 static int __check_pipe(int pfd)
91 if (fstat(pfd, &sb) < 0)
93 if (!S_ISFIFO(sb.st_mode))
99 static inline int check_input_pipe(void)
101 if (!__check_pipe(STDIN_FILENO))
104 fprintf(stderr, "stdin must be a pipe\n");
108 static inline int check_output_pipe(void)
110 if (!__check_pipe(STDOUT_FILENO))
113 fprintf(stderr, "stdout must be a pipe\n");