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git/builtin/upload-archive.c

133 lines
3.1 KiB

/*
* Copyright (c) 2006 Franck Bui-Huu
*/
#include "cache.h"
#include "builtin.h"
#include "archive.h"
#include "pkt-line.h"
#include "sideband.h"
#include "run-command.h"
#include "strvec.h"
static const char upload_archive_usage[] =
"git upload-archive <repo>";
static const char deadchild[] =
"git upload-archive: archiver died with error";
#define MAX_ARGS (64)
int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix)
{
struct strvec sent_argv = STRVEC_INIT;
const char *arg_cmd = "argument ";
if (argc != 2 || !strcmp(argv[1], "-h"))
usage(upload_archive_usage);
if (!enter_repo(argv[1], 0))
die("'%s' does not appear to be a git repository", argv[1]);
init_archivers();
/* put received options in sent_argv[] */
strvec_push(&sent_argv, "git-upload-archive");
for (;;) {
char *buf = packet_read_line(0, NULL);
if (!buf)
break; /* got a flush */
if (sent_argv.nr > MAX_ARGS)
die("Too many options (>%d)", MAX_ARGS - 1);
if (!starts_with(buf, arg_cmd))
die("'argument' token or flush expected");
strvec_push(&sent_argv, buf + strlen(arg_cmd));
}
/* parse all options sent by the client */
return write_archive(sent_argv.nr, sent_argv.v, prefix,
the_repository, NULL, 1);
}
__attribute__((format (printf, 1, 2)))
static void error_clnt(const char *fmt, ...)
{
struct strbuf buf = STRBUF_INIT;
va_list params;
va_start(params, fmt);
strbuf_vaddf(&buf, fmt, params);
va_end(params);
send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX);
die("sent error to the client: %s", buf.buf);
}
static ssize_t process_input(int child_fd, int band)
{
char buf[16384];
ssize_t sz = read(child_fd, buf, sizeof(buf));
if (sz < 0) {
if (errno != EAGAIN && errno != EINTR)
error_clnt("read error: %s\n", strerror(errno));
return sz;
}
send_sideband(1, band, buf, sz, LARGE_PACKET_MAX);
return sz;
}
int cmd_upload_archive(int argc, const char **argv, const char *prefix)
{
struct child_process writer = { argv };
if (argc == 2 && !strcmp(argv[1], "-h"))
usage(upload_archive_usage);
/*
* Set up sideband subprocess.
*
* We (parent) monitor and read from child, sending its fd#1 and fd#2
* multiplexed out to our fd#1. If the child dies, we tell the other
* end over channel #3.
*/
argv[0] = "upload-archive--writer";
writer.out = writer.err = -1;
writer.git_cmd = 1;
if (start_command(&writer)) {
int err = errno;
packet_write_fmt(1, "NACK unable to spawn subprocess\n");
die("upload-archive: %s", strerror(err));
}
packet_write_fmt(1, "ACK\n");
packet_flush(1);
while (1) {
struct pollfd pfd[2];
pfd[0].fd = writer.out;
pfd[0].events = POLLIN;
pfd[1].fd = writer.err;
pfd[1].events = POLLIN;
if (poll(pfd, 2, -1) < 0) {
if (errno != EINTR) {
error_errno("poll failed resuming");
sleep(1);
}
continue;
}
if (pfd[1].revents & POLLIN)
/* Status stream ready */
if (process_input(pfd[1].fd, 2))
continue;
if (pfd[0].revents & POLLIN)
/* Data stream ready */
if (process_input(pfd[0].fd, 1))
continue;
if (finish_command(&writer))
error_clnt("%s", deadchild);
packet_flush(1);
break;
}
return 0;
}