Commit | Line | Data |
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d633e577 JA |
1 | /* |
2 | * A tee implementation using sys_tee. Sends out the data received over | |
3 | * stdin to the given host:port and over stdout. | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <unistd.h> | |
8 | #include <string.h> | |
9 | #include <fcntl.h> | |
d633e577 JA |
10 | #include <netinet/in.h> |
11 | #include <arpa/inet.h> | |
12 | #include <netdb.h> | |
d633e577 JA |
13 | #include <sys/types.h> |
14 | #include <errno.h> | |
15 | #include <limits.h> | |
16 | ||
17 | #include "splice.h" | |
18 | ||
19 | static int do_splice(int infd, int outfd, unsigned int len, char *msg) | |
20 | { | |
21 | while (len) { | |
13b72067 | 22 | int written = ssplice(infd, NULL, outfd, NULL, len, 0); |
d633e577 JA |
23 | |
24 | if (written <= 0) | |
25 | return error(msg); | |
26 | ||
27 | len -= written; | |
28 | } | |
29 | ||
30 | return 0; | |
31 | } | |
32 | ||
33 | static int usage(char *name) | |
34 | { | |
f91353a3 | 35 | fprintf(stderr, "... | %s: hostname:port\n", name); |
d633e577 JA |
36 | return 1; |
37 | } | |
38 | ||
39 | int main(int argc, char *argv[]) | |
40 | { | |
41 | struct sockaddr_in addr; | |
42 | char *p, *hname; | |
d633e577 JA |
43 | int fd; |
44 | ||
45 | if (argc < 2) | |
46 | return usage(argv[0]); | |
47 | ||
76797253 | 48 | if (check_input_pipe()) |
f91353a3 | 49 | return usage(argv[0]); |
d633e577 JA |
50 | |
51 | hname = strdup(argv[1]); | |
52 | p = strstr(hname, ":"); | |
53 | if (!p) | |
54 | return usage(argv[0]); | |
55 | ||
56 | memset(&addr, 0, sizeof(addr)); | |
57 | addr.sin_family = AF_INET; | |
58 | addr.sin_port = htons(atoi(p + 1)); | |
59 | *p = '\0'; | |
60 | ||
61 | if (inet_aton(hname, &addr.sin_addr) != 1) { | |
62 | struct hostent *hent = gethostbyname(hname); | |
63 | ||
64 | if (!hent) | |
65 | return error("gethostbyname"); | |
66 | ||
67 | memcpy(&addr.sin_addr, hent->h_addr, 4); | |
68 | } | |
69 | ||
70 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
71 | if (fd < 0) | |
72 | return error("socket"); | |
73 | ||
d633e577 JA |
74 | if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) |
75 | return error("connect"); | |
76 | ||
77 | do { | |
13b72067 | 78 | int tee_len = stee(STDIN_FILENO, STDOUT_FILENO, INT_MAX, 0); |
d633e577 JA |
79 | |
80 | if (tee_len < 0) { | |
81 | if (errno == EAGAIN) { | |
82 | usleep(1000); | |
83 | continue; | |
84 | } | |
85 | return error("tee"); | |
86 | } else if (!tee_len) | |
87 | break; | |
88 | ||
89 | /* | |
90 | * Send output to file, also consumes input pipe. | |
91 | */ | |
92 | if (do_splice(STDIN_FILENO, fd, tee_len, "splice-net")) | |
93 | break; | |
94 | } while (1); | |
95 | ||
96 | close(fd); | |
97 | return 0; | |
98 | } |