f4609b896f
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because there is some breakage in the git build related to the netrc credentials helper which someone has taken care of in nixpkgs. The stable channel is not used for anything other than git, so this should be fine. Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
133 lines
3.1 KiB
C
133 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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