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d70a9eb611
The "argc" and "argv" names made sense when the struct was argv_array, but now they're just confusing. Let's rename them to "nr" (which we use for counts elsewhere) and "v" (which is rather terse, but reads well when combined with typical variable names like "args.v"). Note that we have to update all of the callers immediately. Playing tricks with the preprocessor is hard here, because we wouldn't want to rewrite unrelated tokens. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/*
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* Copyright (c) 2006 Franck Bui-Huu
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "archive.h"
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#include "pkt-line.h"
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#include "sideband.h"
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#include "run-command.h"
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#include "strvec.h"
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static const char upload_archive_usage[] =
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"git upload-archive <repo>";
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static const char deadchild[] =
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"git upload-archive: archiver died with error";
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#define MAX_ARGS (64)
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int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix)
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{
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struct strvec sent_argv = STRVEC_INIT;
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const char *arg_cmd = "argument ";
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if (argc != 2 || !strcmp(argv[1], "-h"))
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usage(upload_archive_usage);
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if (!enter_repo(argv[1], 0))
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die("'%s' does not appear to be a git repository", argv[1]);
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init_archivers();
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/* put received options in sent_argv[] */
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strvec_push(&sent_argv, "git-upload-archive");
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for (;;) {
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char *buf = packet_read_line(0, NULL);
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if (!buf)
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break; /* got a flush */
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if (sent_argv.nr > MAX_ARGS)
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die("Too many options (>%d)", MAX_ARGS - 1);
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if (!starts_with(buf, arg_cmd))
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die("'argument' token or flush expected");
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strvec_push(&sent_argv, buf + strlen(arg_cmd));
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}
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/* parse all options sent by the client */
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return write_archive(sent_argv.nr, sent_argv.v, prefix,
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the_repository, NULL, 1);
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}
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__attribute__((format (printf, 1, 2)))
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static void error_clnt(const char *fmt, ...)
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{
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struct strbuf buf = STRBUF_INIT;
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va_list params;
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va_start(params, fmt);
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strbuf_vaddf(&buf, fmt, params);
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va_end(params);
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send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX);
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die("sent error to the client: %s", buf.buf);
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}
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static ssize_t process_input(int child_fd, int band)
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{
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char buf[16384];
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ssize_t sz = read(child_fd, buf, sizeof(buf));
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if (sz < 0) {
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if (errno != EAGAIN && errno != EINTR)
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error_clnt("read error: %s\n", strerror(errno));
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return sz;
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}
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send_sideband(1, band, buf, sz, LARGE_PACKET_MAX);
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return sz;
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}
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int cmd_upload_archive(int argc, const char **argv, const char *prefix)
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{
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struct child_process writer = { argv };
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if (argc == 2 && !strcmp(argv[1], "-h"))
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usage(upload_archive_usage);
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/*
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* Set up sideband subprocess.
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*
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* We (parent) monitor and read from child, sending its fd#1 and fd#2
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* multiplexed out to our fd#1. If the child dies, we tell the other
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* end over channel #3.
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*/
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argv[0] = "upload-archive--writer";
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writer.out = writer.err = -1;
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writer.git_cmd = 1;
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if (start_command(&writer)) {
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int err = errno;
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packet_write_fmt(1, "NACK unable to spawn subprocess\n");
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die("upload-archive: %s", strerror(err));
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}
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packet_write_fmt(1, "ACK\n");
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packet_flush(1);
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while (1) {
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struct pollfd pfd[2];
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pfd[0].fd = writer.out;
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pfd[0].events = POLLIN;
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pfd[1].fd = writer.err;
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pfd[1].events = POLLIN;
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if (poll(pfd, 2, -1) < 0) {
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if (errno != EINTR) {
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error_errno("poll failed resuming");
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sleep(1);
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}
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continue;
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}
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if (pfd[1].revents & POLLIN)
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/* Status stream ready */
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if (process_input(pfd[1].fd, 2))
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continue;
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if (pfd[0].revents & POLLIN)
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/* Data stream ready */
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if (process_input(pfd[0].fd, 1))
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continue;
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if (finish_command(&writer))
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error_clnt("%s", deadchild);
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packet_flush(1);
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break;
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}
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return 0;
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}
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