add 'git credential' plumbing command
[git/git.git] / builtin / remote-fd.c
CommitLineData
c2e86add 1#include "builtin.h"
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2#include "transport.h"
3
4/*
5 * URL syntax:
6 * 'fd::<inoutfd>[/<anything>]' Read/write socket pair
7 * <inoutfd>.
8 * 'fd::<infd>,<outfd>[/<anything>]' Read pipe <infd> and write
9 * pipe <outfd>.
10 * [foo] indicates 'foo' is optional. <anything> is any string.
11 *
12 * The data output to <outfd>/<inoutfd> should be passed unmolested to
13 * git-receive-pack/git-upload-pack/git-upload-archive and output of
14 * git-receive-pack/git-upload-pack/git-upload-archive should be passed
15 * unmolested to <infd>/<inoutfd>.
16 *
17 */
18
19#define MAXCOMMAND 4096
20
21static void command_loop(int input_fd, int output_fd)
22{
23 char buffer[MAXCOMMAND];
24
25 while (1) {
26 size_t i;
27 if (!fgets(buffer, MAXCOMMAND - 1, stdin)) {
28 if (ferror(stdin))
29 die("Input error");
30 return;
31 }
32 /* Strip end of line characters. */
33 i = strlen(buffer);
7851b1e6 34 while (i > 0 && isspace(buffer[i - 1]))
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35 buffer[--i] = 0;
36
37 if (!strcmp(buffer, "capabilities")) {
38 printf("*connect\n\n");
39 fflush(stdout);
40 } else if (!strncmp(buffer, "connect ", 8)) {
41 printf("\n");
42 fflush(stdout);
43 if (bidirectional_transfer_loop(input_fd,
44 output_fd))
45 die("Copying data between file descriptors failed");
46 return;
47 } else {
48 die("Bad command: %s", buffer);
49 }
50 }
51}
52
53int cmd_remote_fd(int argc, const char **argv, const char *prefix)
54{
55 int input_fd = -1;
56 int output_fd = -1;
57 char *end;
58
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59 if (argc != 3)
60 die("Expected two arguments");
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61
62 input_fd = (int)strtoul(argv[2], &end, 10);
63
64 if ((end == argv[2]) || (*end != ',' && *end != '/' && *end))
65 die("Bad URL syntax");
66
67 if (*end == '/' || !*end) {
68 output_fd = input_fd;
69 } else {
70 char *end2;
71 output_fd = (int)strtoul(end + 1, &end2, 10);
72
73 if ((end2 == end + 1) || (*end2 != '/' && *end2))
74 die("Bad URL syntax");
75 }
76
77 command_loop(input_fd, output_fd);
78 return 0;
79}