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![Ævar Arnfjörð Bjarmason](/assets/img/avatar_default.png)
Change the skeleton implementation of i18n in Git to one that can show localized strings to users for our C, Shell and Perl programs using either GNU libintl or the Solaris gettext implementation. This new internationalization support is enabled by default. If gettext isn't available, or if Git is compiled with NO_GETTEXT=YesPlease, Git falls back on its current behavior of showing interface messages in English. When using the autoconf script we'll auto-detect if the gettext libraries are installed and act appropriately. This change is somewhat large because as well as adding a C, Shell and Perl i18n interface we're adding a lot of tests for them, and for those tests to work we need a skeleton PO file to actually test translations. A minimal Icelandic translation is included for this purpose. Icelandic includes multi-byte characters which makes it easy to test various edge cases, and it's a language I happen to understand. The rest of the commit message goes into detail about various sub-parts of this commit. = Installation Gettext .mo files will be installed and looked for in the standard $(prefix)/share/locale path. GIT_TEXTDOMAINDIR can also be set to override that, but that's only intended to be used to test Git itself. = Perl Perl code that's to be localized should use the new Git::I18n module. It imports a __ function into the caller's package by default. Instead of using the high level Locale::TextDomain interface I've opted to use the low-level (equivalent to the C interface) Locale::Messages module, which Locale::TextDomain itself uses. Locale::TextDomain does a lot of redundant work we don't need, and some of it would potentially introduce bugs. It tries to set the $TEXTDOMAIN based on package of the caller, and has its own hardcoded paths where it'll search for messages. I found it easier just to completely avoid it rather than try to circumvent its behavior. In any case, this is an issue wholly internal Git::I18N. Its guts can be changed later if that's deemed necessary. See <AANLkTilYD_NyIZMyj9dHtVk-ylVBfvyxpCC7982LWnVd@mail.gmail.com> for a further elaboration on this topic. = Shell Shell code that's to be localized should use the git-sh-i18n library. It's basically just a wrapper for the system's gettext.sh. If gettext.sh isn't available we'll fall back on gettext(1) if it's available. The latter is available without the former on Solaris, which has its own non-GNU gettext implementation. We also need to emulate eval_gettext() there. If neither are present we'll use a dumb printf(1) fall-through wrapper. = About libcharset.h and langinfo.h We use libcharset to query the character set of the current locale if it's available. I.e. we'll use it instead of nl_langinfo if HAVE_LIBCHARSET_H is set. The GNU gettext manual recommends using langinfo.h's nl_langinfo(CODESET) to acquire the current character set, but on systems that have libcharset.h's locale_charset() using the latter is either saner, or the only option on those systems. GNU and Solaris have a nl_langinfo(CODESET), FreeBSD can use either, but MinGW and some others need to use libcharset.h's locale_charset() instead. =Credits This patch is based on work by Jeff Epler <jepler@unpythonic.net> who did the initial Makefile / C work, and a lot of comments from the Git mailing list, including Jonathan Nieder, Jakub Narebski, Johannes Sixt, Erik Faye-Lund, Peter Krefting, Junio C Hamano, Thomas Rast and others. [jc: squashed a small Makefile fix from Ramsay] Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1293 lines
29 KiB
C
1293 lines
29 KiB
C
#include "cache.h"
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#include "pkt-line.h"
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#include "exec_cmd.h"
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#include "run-command.h"
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#include "strbuf.h"
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#include "string-list.h"
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#ifndef HOST_NAME_MAX
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#define HOST_NAME_MAX 256
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#endif
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#ifndef NI_MAXSERV
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#define NI_MAXSERV 32
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#endif
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#ifdef NO_INITGROUPS
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#define initgroups(x, y) (0) /* nothing */
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#endif
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static int log_syslog;
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static int verbose;
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static int reuseaddr;
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static int informative_errors;
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static const char daemon_usage[] =
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"git daemon [--verbose] [--syslog] [--export-all]\n"
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" [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>]\n"
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" [--strict-paths] [--base-path=<path>] [--base-path-relaxed]\n"
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" [--user-path | --user-path=<path>]\n"
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" [--interpolated-path=<path>]\n"
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" [--reuseaddr] [--pid-file=<file>]\n"
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" [--(enable|disable|allow-override|forbid-override)=<service>]\n"
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" [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
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" [--detach] [--user=<user> [--group=<group>]]\n"
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" [<directory>...]";
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/* List of acceptable pathname prefixes */
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static char **ok_paths;
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static int strict_paths;
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/* If this is set, git-daemon-export-ok is not required */
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static int export_all_trees;
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/* Take all paths relative to this one if non-NULL */
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static char *base_path;
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static char *interpolated_path;
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static int base_path_relaxed;
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/* Flag indicating client sent extra args. */
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static int saw_extended_args;
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/* If defined, ~user notation is allowed and the string is inserted
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* after ~user/. E.g. a request to git://host/~alice/frotz would
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* go to /home/alice/pub_git/frotz with --user-path=pub_git.
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*/
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static const char *user_path;
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/* Timeout, and initial timeout */
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static unsigned int timeout;
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static unsigned int init_timeout;
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static char *hostname;
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static char *canon_hostname;
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static char *ip_address;
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static char *tcp_port;
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static void logreport(int priority, const char *err, va_list params)
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{
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if (log_syslog) {
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char buf[1024];
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vsnprintf(buf, sizeof(buf), err, params);
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syslog(priority, "%s", buf);
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} else {
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/*
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* Since stderr is set to buffered mode, the
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* logging of different processes will not overlap
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* unless they overflow the (rather big) buffers.
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*/
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fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
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vfprintf(stderr, err, params);
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fputc('\n', stderr);
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fflush(stderr);
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}
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}
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__attribute__((format (printf, 1, 2)))
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static void logerror(const char *err, ...)
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{
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va_list params;
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va_start(params, err);
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logreport(LOG_ERR, err, params);
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va_end(params);
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}
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__attribute__((format (printf, 1, 2)))
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static void loginfo(const char *err, ...)
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{
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va_list params;
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if (!verbose)
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return;
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va_start(params, err);
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logreport(LOG_INFO, err, params);
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va_end(params);
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}
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static void NORETURN daemon_die(const char *err, va_list params)
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{
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logreport(LOG_ERR, err, params);
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exit(1);
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}
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static const char *path_ok(char *directory)
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{
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static char rpath[PATH_MAX];
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static char interp_path[PATH_MAX];
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const char *path;
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char *dir;
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dir = directory;
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if (daemon_avoid_alias(dir)) {
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logerror("'%s': aliased", dir);
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return NULL;
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}
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if (*dir == '~') {
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if (!user_path) {
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logerror("'%s': User-path not allowed", dir);
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return NULL;
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}
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if (*user_path) {
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/* Got either "~alice" or "~alice/foo";
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* rewrite them to "~alice/%s" or
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* "~alice/%s/foo".
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*/
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int namlen, restlen = strlen(dir);
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char *slash = strchr(dir, '/');
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if (!slash)
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slash = dir + restlen;
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namlen = slash - dir;
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restlen -= namlen;
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loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
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snprintf(rpath, PATH_MAX, "%.*s/%s%.*s",
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namlen, dir, user_path, restlen, slash);
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dir = rpath;
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}
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}
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else if (interpolated_path && saw_extended_args) {
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struct strbuf expanded_path = STRBUF_INIT;
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struct strbuf_expand_dict_entry dict[6];
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dict[0].placeholder = "H"; dict[0].value = hostname;
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dict[1].placeholder = "CH"; dict[1].value = canon_hostname;
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dict[2].placeholder = "IP"; dict[2].value = ip_address;
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dict[3].placeholder = "P"; dict[3].value = tcp_port;
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dict[4].placeholder = "D"; dict[4].value = directory;
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dict[5].placeholder = NULL; dict[5].value = NULL;
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if (*dir != '/') {
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/* Allow only absolute */
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logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
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return NULL;
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}
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strbuf_expand(&expanded_path, interpolated_path,
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strbuf_expand_dict_cb, &dict);
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strlcpy(interp_path, expanded_path.buf, PATH_MAX);
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strbuf_release(&expanded_path);
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loginfo("Interpolated dir '%s'", interp_path);
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dir = interp_path;
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}
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else if (base_path) {
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if (*dir != '/') {
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/* Allow only absolute */
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logerror("'%s': Non-absolute path denied (base-path active)", dir);
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return NULL;
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}
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snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
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dir = rpath;
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}
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path = enter_repo(dir, strict_paths);
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if (!path && base_path && base_path_relaxed) {
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/*
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* if we fail and base_path_relaxed is enabled, try without
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* prefixing the base path
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*/
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dir = directory;
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path = enter_repo(dir, strict_paths);
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}
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if (!path) {
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logerror("'%s' does not appear to be a git repository", dir);
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return NULL;
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}
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if ( ok_paths && *ok_paths ) {
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char **pp;
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int pathlen = strlen(path);
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/* The validation is done on the paths after enter_repo
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* appends optional {.git,.git/.git} and friends, but
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* it does not use getcwd(). So if your /pub is
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* a symlink to /mnt/pub, you can whitelist /pub and
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* do not have to say /mnt/pub.
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* Do not say /pub/.
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*/
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for ( pp = ok_paths ; *pp ; pp++ ) {
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int len = strlen(*pp);
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if (len <= pathlen &&
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!memcmp(*pp, path, len) &&
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(path[len] == '\0' ||
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(!strict_paths && path[len] == '/')))
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return path;
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}
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}
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else {
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/* be backwards compatible */
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if (!strict_paths)
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return path;
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}
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logerror("'%s': not in whitelist", path);
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return NULL; /* Fallthrough. Deny by default */
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}
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typedef int (*daemon_service_fn)(void);
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struct daemon_service {
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const char *name;
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const char *config_name;
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daemon_service_fn fn;
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int enabled;
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int overridable;
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};
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static struct daemon_service *service_looking_at;
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static int service_enabled;
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static int git_daemon_config(const char *var, const char *value, void *cb)
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{
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if (!prefixcmp(var, "daemon.") &&
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!strcmp(var + 7, service_looking_at->config_name)) {
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service_enabled = git_config_bool(var, value);
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return 0;
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}
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/* we are not interested in parsing any other configuration here */
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return 0;
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}
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static int daemon_error(const char *dir, const char *msg)
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{
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if (!informative_errors)
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msg = "access denied or repository not exported";
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packet_write(1, "ERR %s: %s", msg, dir);
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return -1;
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}
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static int run_service(char *dir, struct daemon_service *service)
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{
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const char *path;
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int enabled = service->enabled;
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loginfo("Request %s for '%s'", service->name, dir);
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if (!enabled && !service->overridable) {
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logerror("'%s': service not enabled.", service->name);
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errno = EACCES;
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return daemon_error(dir, "service not enabled");
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}
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if (!(path = path_ok(dir)))
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return daemon_error(dir, "no such repository");
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/*
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* Security on the cheap.
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*
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* We want a readable HEAD, usable "objects" directory, and
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* a "git-daemon-export-ok" flag that says that the other side
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* is ok with us doing this.
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*
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* path_ok() uses enter_repo() and does whitelist checking.
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* We only need to make sure the repository is exported.
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*/
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if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
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logerror("'%s': repository not exported.", path);
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errno = EACCES;
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return daemon_error(dir, "repository not exported");
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}
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if (service->overridable) {
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service_looking_at = service;
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service_enabled = -1;
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git_config(git_daemon_config, NULL);
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if (0 <= service_enabled)
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enabled = service_enabled;
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}
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if (!enabled) {
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logerror("'%s': service not enabled for '%s'",
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service->name, path);
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errno = EACCES;
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return daemon_error(dir, "service not enabled");
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}
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/*
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* We'll ignore SIGTERM from now on, we have a
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* good client.
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*/
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signal(SIGTERM, SIG_IGN);
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return service->fn();
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}
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static void copy_to_log(int fd)
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{
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struct strbuf line = STRBUF_INIT;
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FILE *fp;
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fp = fdopen(fd, "r");
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if (fp == NULL) {
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logerror("fdopen of error channel failed");
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close(fd);
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return;
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}
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while (strbuf_getline(&line, fp, '\n') != EOF) {
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logerror("%s", line.buf);
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strbuf_setlen(&line, 0);
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}
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strbuf_release(&line);
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fclose(fp);
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}
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static int run_service_command(const char **argv)
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{
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struct child_process cld;
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memset(&cld, 0, sizeof(cld));
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cld.argv = argv;
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cld.git_cmd = 1;
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cld.err = -1;
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if (start_command(&cld))
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return -1;
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close(0);
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close(1);
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copy_to_log(cld.err);
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return finish_command(&cld);
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}
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static int upload_pack(void)
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{
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/* Timeout as string */
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char timeout_buf[64];
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const char *argv[] = { "upload-pack", "--strict", NULL, ".", NULL };
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argv[2] = timeout_buf;
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snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
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return run_service_command(argv);
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}
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static int upload_archive(void)
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{
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static const char *argv[] = { "upload-archive", ".", NULL };
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return run_service_command(argv);
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}
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static int receive_pack(void)
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{
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static const char *argv[] = { "receive-pack", ".", NULL };
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return run_service_command(argv);
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}
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static struct daemon_service daemon_service[] = {
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{ "upload-archive", "uploadarch", upload_archive, 0, 1 },
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{ "upload-pack", "uploadpack", upload_pack, 1, 1 },
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{ "receive-pack", "receivepack", receive_pack, 0, 1 },
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};
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static void enable_service(const char *name, int ena)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
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if (!strcmp(daemon_service[i].name, name)) {
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daemon_service[i].enabled = ena;
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return;
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}
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}
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die("No such service %s", name);
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}
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static void make_service_overridable(const char *name, int ena)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
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if (!strcmp(daemon_service[i].name, name)) {
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daemon_service[i].overridable = ena;
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return;
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}
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}
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die("No such service %s", name);
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}
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static char *xstrdup_tolower(const char *str)
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{
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char *p, *dup = xstrdup(str);
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for (p = dup; *p; p++)
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*p = tolower(*p);
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return dup;
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}
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static void parse_host_and_port(char *hostport, char **host,
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char **port)
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{
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if (*hostport == '[') {
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char *end;
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end = strchr(hostport, ']');
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if (!end)
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die("Invalid request ('[' without ']')");
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*end = '\0';
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*host = hostport + 1;
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if (!end[1])
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*port = NULL;
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else if (end[1] == ':')
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*port = end + 2;
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else
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die("Garbage after end of host part");
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} else {
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*host = hostport;
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*port = strrchr(hostport, ':');
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if (*port) {
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**port = '\0';
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++*port;
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}
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}
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}
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/*
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* Read the host as supplied by the client connection.
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|
*/
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static void parse_host_arg(char *extra_args, int buflen)
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|
{
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|
char *val;
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|
int vallen;
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|
char *end = extra_args + buflen;
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|
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if (extra_args < end && *extra_args) {
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saw_extended_args = 1;
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if (strncasecmp("host=", extra_args, 5) == 0) {
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val = extra_args + 5;
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vallen = strlen(val) + 1;
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if (*val) {
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/* Split <host>:<port> at colon. */
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char *host;
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char *port;
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parse_host_and_port(val, &host, &port);
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if (port) {
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free(tcp_port);
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tcp_port = xstrdup(port);
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}
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|
free(hostname);
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hostname = xstrdup_tolower(host);
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}
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|
|
/* On to the next one */
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|
extra_args = val + vallen;
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|
}
|
|
if (extra_args < end && *extra_args)
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|
die("Invalid request");
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|
}
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|
|
/*
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|
* Locate canonical hostname and its IP address.
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|
*/
|
|
if (hostname) {
|
|
#ifndef NO_IPV6
|
|
struct addrinfo hints;
|
|
struct addrinfo *ai;
|
|
int gai;
|
|
static char addrbuf[HOST_NAME_MAX + 1];
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_CANONNAME;
|
|
|
|
gai = getaddrinfo(hostname, NULL, &hints, &ai);
|
|
if (!gai) {
|
|
struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
|
|
|
|
inet_ntop(AF_INET, &sin_addr->sin_addr,
|
|
addrbuf, sizeof(addrbuf));
|
|
free(ip_address);
|
|
ip_address = xstrdup(addrbuf);
|
|
|
|
free(canon_hostname);
|
|
canon_hostname = xstrdup(ai->ai_canonname ?
|
|
ai->ai_canonname : ip_address);
|
|
|
|
freeaddrinfo(ai);
|
|
}
|
|
#else
|
|
struct hostent *hent;
|
|
struct sockaddr_in sa;
|
|
char **ap;
|
|
static char addrbuf[HOST_NAME_MAX + 1];
|
|
|
|
hent = gethostbyname(hostname);
|
|
|
|
ap = hent->h_addr_list;
|
|
memset(&sa, 0, sizeof sa);
|
|
sa.sin_family = hent->h_addrtype;
|
|
sa.sin_port = htons(0);
|
|
memcpy(&sa.sin_addr, *ap, hent->h_length);
|
|
|
|
inet_ntop(hent->h_addrtype, &sa.sin_addr,
|
|
addrbuf, sizeof(addrbuf));
|
|
|
|
free(canon_hostname);
|
|
canon_hostname = xstrdup(hent->h_name);
|
|
free(ip_address);
|
|
ip_address = xstrdup(addrbuf);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
static int execute(void)
|
|
{
|
|
static char line[1000];
|
|
int pktlen, len, i;
|
|
char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
|
|
|
|
if (addr)
|
|
loginfo("Connection from %s:%s", addr, port);
|
|
|
|
alarm(init_timeout ? init_timeout : timeout);
|
|
pktlen = packet_read_line(0, line, sizeof(line));
|
|
alarm(0);
|
|
|
|
len = strlen(line);
|
|
if (pktlen != len)
|
|
loginfo("Extended attributes (%d bytes) exist <%.*s>",
|
|
(int) pktlen - len,
|
|
(int) pktlen - len, line + len + 1);
|
|
if (len && line[len-1] == '\n') {
|
|
line[--len] = 0;
|
|
pktlen--;
|
|
}
|
|
|
|
free(hostname);
|
|
free(canon_hostname);
|
|
free(ip_address);
|
|
free(tcp_port);
|
|
hostname = canon_hostname = ip_address = tcp_port = NULL;
|
|
|
|
if (len != pktlen)
|
|
parse_host_arg(line + len + 1, pktlen - len - 1);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
|
|
struct daemon_service *s = &(daemon_service[i]);
|
|
int namelen = strlen(s->name);
|
|
if (!prefixcmp(line, "git-") &&
|
|
!strncmp(s->name, line + 4, namelen) &&
|
|
line[namelen + 4] == ' ') {
|
|
/*
|
|
* Note: The directory here is probably context sensitive,
|
|
* and might depend on the actual service being performed.
|
|
*/
|
|
return run_service(line + namelen + 5, s);
|
|
}
|
|
}
|
|
|
|
logerror("Protocol error: '%s'", line);
|
|
return -1;
|
|
}
|
|
|
|
static int addrcmp(const struct sockaddr_storage *s1,
|
|
const struct sockaddr_storage *s2)
|
|
{
|
|
const struct sockaddr *sa1 = (const struct sockaddr*) s1;
|
|
const struct sockaddr *sa2 = (const struct sockaddr*) s2;
|
|
|
|
if (sa1->sa_family != sa2->sa_family)
|
|
return sa1->sa_family - sa2->sa_family;
|
|
if (sa1->sa_family == AF_INET)
|
|
return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
|
|
&((struct sockaddr_in *)s2)->sin_addr,
|
|
sizeof(struct in_addr));
|
|
#ifndef NO_IPV6
|
|
if (sa1->sa_family == AF_INET6)
|
|
return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
|
|
&((struct sockaddr_in6 *)s2)->sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int max_connections = 32;
|
|
|
|
static unsigned int live_children;
|
|
|
|
static struct child {
|
|
struct child *next;
|
|
struct child_process cld;
|
|
struct sockaddr_storage address;
|
|
} *firstborn;
|
|
|
|
static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
|
|
{
|
|
struct child *newborn, **cradle;
|
|
|
|
newborn = xcalloc(1, sizeof(*newborn));
|
|
live_children++;
|
|
memcpy(&newborn->cld, cld, sizeof(*cld));
|
|
memcpy(&newborn->address, addr, addrlen);
|
|
for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
|
|
if (!addrcmp(&(*cradle)->address, &newborn->address))
|
|
break;
|
|
newborn->next = *cradle;
|
|
*cradle = newborn;
|
|
}
|
|
|
|
/*
|
|
* This gets called if the number of connections grows
|
|
* past "max_connections".
|
|
*
|
|
* We kill the newest connection from a duplicate IP.
|
|
*/
|
|
static void kill_some_child(void)
|
|
{
|
|
const struct child *blanket, *next;
|
|
|
|
if (!(blanket = firstborn))
|
|
return;
|
|
|
|
for (; (next = blanket->next); blanket = next)
|
|
if (!addrcmp(&blanket->address, &next->address)) {
|
|
kill(blanket->cld.pid, SIGTERM);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void check_dead_children(void)
|
|
{
|
|
int status;
|
|
pid_t pid;
|
|
|
|
struct child **cradle, *blanket;
|
|
for (cradle = &firstborn; (blanket = *cradle);)
|
|
if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
|
|
const char *dead = "";
|
|
if (status)
|
|
dead = " (with error)";
|
|
loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
|
|
|
|
/* remove the child */
|
|
*cradle = blanket->next;
|
|
live_children--;
|
|
free(blanket);
|
|
} else
|
|
cradle = &blanket->next;
|
|
}
|
|
|
|
static char **cld_argv;
|
|
static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
|
|
{
|
|
struct child_process cld = { NULL };
|
|
char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
|
|
char *env[] = { addrbuf, portbuf, NULL };
|
|
|
|
if (max_connections && live_children >= max_connections) {
|
|
kill_some_child();
|
|
sleep(1); /* give it some time to die */
|
|
check_dead_children();
|
|
if (live_children >= max_connections) {
|
|
close(incoming);
|
|
logerror("Too many children, dropping connection");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (addr->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin_addr = (void *) addr;
|
|
inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
|
|
sizeof(addrbuf) - 12);
|
|
snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
|
|
ntohs(sin_addr->sin_port));
|
|
#ifndef NO_IPV6
|
|
} else if (addr && addr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6_addr = (void *) addr;
|
|
|
|
char *buf = addrbuf + 12;
|
|
*buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
|
|
inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
|
|
sizeof(addrbuf) - 13);
|
|
strcat(buf, "]");
|
|
|
|
snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
|
|
ntohs(sin6_addr->sin6_port));
|
|
#endif
|
|
}
|
|
|
|
cld.env = (const char **)env;
|
|
cld.argv = (const char **)cld_argv;
|
|
cld.in = incoming;
|
|
cld.out = dup(incoming);
|
|
|
|
if (start_command(&cld))
|
|
logerror("unable to fork");
|
|
else
|
|
add_child(&cld, addr, addrlen);
|
|
close(incoming);
|
|
}
|
|
|
|
static void child_handler(int signo)
|
|
{
|
|
/*
|
|
* Otherwise empty handler because systemcalls will get interrupted
|
|
* upon signal receipt
|
|
* SysV needs the handler to be rearmed
|
|
*/
|
|
signal(SIGCHLD, child_handler);
|
|
}
|
|
|
|
static int set_reuse_addr(int sockfd)
|
|
{
|
|
int on = 1;
|
|
|
|
if (!reuseaddr)
|
|
return 0;
|
|
return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
|
|
&on, sizeof(on));
|
|
}
|
|
|
|
struct socketlist {
|
|
int *list;
|
|
size_t nr;
|
|
size_t alloc;
|
|
};
|
|
|
|
static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
|
|
{
|
|
#ifdef NO_IPV6
|
|
static char ip[INET_ADDRSTRLEN];
|
|
#else
|
|
static char ip[INET6_ADDRSTRLEN];
|
|
#endif
|
|
|
|
switch (family) {
|
|
#ifndef NO_IPV6
|
|
case AF_INET6:
|
|
inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
|
|
break;
|
|
#endif
|
|
case AF_INET:
|
|
inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
|
|
break;
|
|
default:
|
|
strcpy(ip, "<unknown>");
|
|
}
|
|
return ip;
|
|
}
|
|
|
|
#ifndef NO_IPV6
|
|
|
|
static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
|
|
{
|
|
int socknum = 0;
|
|
int maxfd = -1;
|
|
char pbuf[NI_MAXSERV];
|
|
struct addrinfo hints, *ai0, *ai;
|
|
int gai;
|
|
long flags;
|
|
|
|
sprintf(pbuf, "%d", listen_port);
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
hints.ai_flags = AI_PASSIVE;
|
|
|
|
gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
|
|
if (gai) {
|
|
logerror("getaddrinfo() for %s failed: %s", listen_addr, gai_strerror(gai));
|
|
return 0;
|
|
}
|
|
|
|
for (ai = ai0; ai; ai = ai->ai_next) {
|
|
int sockfd;
|
|
|
|
sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
|
|
if (sockfd < 0)
|
|
continue;
|
|
if (sockfd >= FD_SETSIZE) {
|
|
logerror("Socket descriptor too large");
|
|
close(sockfd);
|
|
continue;
|
|
}
|
|
|
|
#ifdef IPV6_V6ONLY
|
|
if (ai->ai_family == AF_INET6) {
|
|
int on = 1;
|
|
setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
&on, sizeof(on));
|
|
/* Note: error is not fatal */
|
|
}
|
|
#endif
|
|
|
|
if (set_reuse_addr(sockfd)) {
|
|
logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
|
|
close(sockfd);
|
|
continue;
|
|
}
|
|
|
|
if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
|
|
logerror("Could not bind to %s: %s",
|
|
ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
|
|
strerror(errno));
|
|
close(sockfd);
|
|
continue; /* not fatal */
|
|
}
|
|
if (listen(sockfd, 5) < 0) {
|
|
logerror("Could not listen to %s: %s",
|
|
ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
|
|
strerror(errno));
|
|
close(sockfd);
|
|
continue; /* not fatal */
|
|
}
|
|
|
|
flags = fcntl(sockfd, F_GETFD, 0);
|
|
if (flags >= 0)
|
|
fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
|
|
|
|
ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
|
|
socklist->list[socklist->nr++] = sockfd;
|
|
socknum++;
|
|
|
|
if (maxfd < sockfd)
|
|
maxfd = sockfd;
|
|
}
|
|
|
|
freeaddrinfo(ai0);
|
|
|
|
return socknum;
|
|
}
|
|
|
|
#else /* NO_IPV6 */
|
|
|
|
static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
|
|
{
|
|
struct sockaddr_in sin;
|
|
int sockfd;
|
|
long flags;
|
|
|
|
memset(&sin, 0, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_port = htons(listen_port);
|
|
|
|
if (listen_addr) {
|
|
/* Well, host better be an IP address here. */
|
|
if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
|
|
return 0;
|
|
} else {
|
|
sin.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
}
|
|
|
|
sockfd = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (sockfd < 0)
|
|
return 0;
|
|
|
|
if (set_reuse_addr(sockfd)) {
|
|
logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
|
|
close(sockfd);
|
|
return 0;
|
|
}
|
|
|
|
if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
|
|
logerror("Could not listen to %s: %s",
|
|
ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
|
|
strerror(errno));
|
|
close(sockfd);
|
|
return 0;
|
|
}
|
|
|
|
if (listen(sockfd, 5) < 0) {
|
|
logerror("Could not listen to %s: %s",
|
|
ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
|
|
strerror(errno));
|
|
close(sockfd);
|
|
return 0;
|
|
}
|
|
|
|
flags = fcntl(sockfd, F_GETFD, 0);
|
|
if (flags >= 0)
|
|
fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
|
|
|
|
ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
|
|
socklist->list[socklist->nr++] = sockfd;
|
|
return 1;
|
|
}
|
|
|
|
#endif
|
|
|
|
static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
|
|
{
|
|
if (!listen_addr->nr)
|
|
setup_named_sock(NULL, listen_port, socklist);
|
|
else {
|
|
int i, socknum;
|
|
for (i = 0; i < listen_addr->nr; i++) {
|
|
socknum = setup_named_sock(listen_addr->items[i].string,
|
|
listen_port, socklist);
|
|
|
|
if (socknum == 0)
|
|
logerror("unable to allocate any listen sockets for host %s on port %u",
|
|
listen_addr->items[i].string, listen_port);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int service_loop(struct socketlist *socklist)
|
|
{
|
|
struct pollfd *pfd;
|
|
int i;
|
|
|
|
pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
|
|
|
|
for (i = 0; i < socklist->nr; i++) {
|
|
pfd[i].fd = socklist->list[i];
|
|
pfd[i].events = POLLIN;
|
|
}
|
|
|
|
signal(SIGCHLD, child_handler);
|
|
|
|
for (;;) {
|
|
int i;
|
|
|
|
check_dead_children();
|
|
|
|
if (poll(pfd, socklist->nr, -1) < 0) {
|
|
if (errno != EINTR) {
|
|
logerror("Poll failed, resuming: %s",
|
|
strerror(errno));
|
|
sleep(1);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < socklist->nr; i++) {
|
|
if (pfd[i].revents & POLLIN) {
|
|
union {
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sai;
|
|
#ifndef NO_IPV6
|
|
struct sockaddr_in6 sai6;
|
|
#endif
|
|
} ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
|
|
if (incoming < 0) {
|
|
switch (errno) {
|
|
case EAGAIN:
|
|
case EINTR:
|
|
case ECONNABORTED:
|
|
continue;
|
|
default:
|
|
die_errno("accept returned");
|
|
}
|
|
}
|
|
handle(incoming, &ss.sa, sslen);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* if any standard file descriptor is missing open it to /dev/null */
|
|
static void sanitize_stdfds(void)
|
|
{
|
|
int fd = open("/dev/null", O_RDWR, 0);
|
|
while (fd != -1 && fd < 2)
|
|
fd = dup(fd);
|
|
if (fd == -1)
|
|
die_errno("open /dev/null or dup failed");
|
|
if (fd > 2)
|
|
close(fd);
|
|
}
|
|
|
|
#ifdef NO_POSIX_GOODIES
|
|
|
|
struct credentials;
|
|
|
|
static void drop_privileges(struct credentials *cred)
|
|
{
|
|
/* nothing */
|
|
}
|
|
|
|
static void daemonize(void)
|
|
{
|
|
die("--detach not supported on this platform");
|
|
}
|
|
|
|
static struct credentials *prepare_credentials(const char *user_name,
|
|
const char *group_name)
|
|
{
|
|
die("--user not supported on this platform");
|
|
}
|
|
|
|
#else
|
|
|
|
struct credentials {
|
|
struct passwd *pass;
|
|
gid_t gid;
|
|
};
|
|
|
|
static void drop_privileges(struct credentials *cred)
|
|
{
|
|
if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
|
|
setgid (cred->gid) || setuid(cred->pass->pw_uid)))
|
|
die("cannot drop privileges");
|
|
}
|
|
|
|
static struct credentials *prepare_credentials(const char *user_name,
|
|
const char *group_name)
|
|
{
|
|
static struct credentials c;
|
|
|
|
c.pass = getpwnam(user_name);
|
|
if (!c.pass)
|
|
die("user not found - %s", user_name);
|
|
|
|
if (!group_name)
|
|
c.gid = c.pass->pw_gid;
|
|
else {
|
|
struct group *group = getgrnam(group_name);
|
|
if (!group)
|
|
die("group not found - %s", group_name);
|
|
|
|
c.gid = group->gr_gid;
|
|
}
|
|
|
|
return &c;
|
|
}
|
|
|
|
static void daemonize(void)
|
|
{
|
|
switch (fork()) {
|
|
case 0:
|
|
break;
|
|
case -1:
|
|
die_errno("fork failed");
|
|
default:
|
|
exit(0);
|
|
}
|
|
if (setsid() == -1)
|
|
die_errno("setsid failed");
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
sanitize_stdfds();
|
|
}
|
|
#endif
|
|
|
|
static void store_pid(const char *path)
|
|
{
|
|
FILE *f = fopen(path, "w");
|
|
if (!f)
|
|
die_errno("cannot open pid file '%s'", path);
|
|
if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
|
|
die_errno("failed to write pid file '%s'", path);
|
|
}
|
|
|
|
static int serve(struct string_list *listen_addr, int listen_port,
|
|
struct credentials *cred)
|
|
{
|
|
struct socketlist socklist = { NULL, 0, 0 };
|
|
|
|
socksetup(listen_addr, listen_port, &socklist);
|
|
if (socklist.nr == 0)
|
|
die("unable to allocate any listen sockets on port %u",
|
|
listen_port);
|
|
|
|
drop_privileges(cred);
|
|
|
|
return service_loop(&socklist);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int listen_port = 0;
|
|
struct string_list listen_addr = STRING_LIST_INIT_NODUP;
|
|
int serve_mode = 0, inetd_mode = 0;
|
|
const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
|
|
int detach = 0;
|
|
struct credentials *cred = NULL;
|
|
int i;
|
|
|
|
git_setup_gettext();
|
|
|
|
git_extract_argv0_path(argv[0]);
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
char *arg = argv[i];
|
|
|
|
if (!prefixcmp(arg, "--listen=")) {
|
|
string_list_append(&listen_addr, xstrdup_tolower(arg + 9));
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--port=")) {
|
|
char *end;
|
|
unsigned long n;
|
|
n = strtoul(arg+7, &end, 0);
|
|
if (arg[7] && !*end) {
|
|
listen_port = n;
|
|
continue;
|
|
}
|
|
}
|
|
if (!strcmp(arg, "--serve")) {
|
|
serve_mode = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--inetd")) {
|
|
inetd_mode = 1;
|
|
log_syslog = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--verbose")) {
|
|
verbose = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--syslog")) {
|
|
log_syslog = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--export-all")) {
|
|
export_all_trees = 1;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--timeout=")) {
|
|
timeout = atoi(arg+10);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--init-timeout=")) {
|
|
init_timeout = atoi(arg+15);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--max-connections=")) {
|
|
max_connections = atoi(arg+18);
|
|
if (max_connections < 0)
|
|
max_connections = 0; /* unlimited */
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--strict-paths")) {
|
|
strict_paths = 1;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--base-path=")) {
|
|
base_path = arg+12;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--base-path-relaxed")) {
|
|
base_path_relaxed = 1;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--interpolated-path=")) {
|
|
interpolated_path = arg+20;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--reuseaddr")) {
|
|
reuseaddr = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--user-path")) {
|
|
user_path = "";
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--user-path=")) {
|
|
user_path = arg + 12;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--pid-file=")) {
|
|
pid_file = arg + 11;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--detach")) {
|
|
detach = 1;
|
|
log_syslog = 1;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--user=")) {
|
|
user_name = arg + 7;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--group=")) {
|
|
group_name = arg + 8;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--enable=")) {
|
|
enable_service(arg + 9, 1);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--disable=")) {
|
|
enable_service(arg + 10, 0);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--allow-override=")) {
|
|
make_service_overridable(arg + 17, 1);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--forbid-override=")) {
|
|
make_service_overridable(arg + 18, 0);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--informative-errors")) {
|
|
informative_errors = 1;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--no-informative-errors")) {
|
|
informative_errors = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--")) {
|
|
ok_paths = &argv[i+1];
|
|
break;
|
|
} else if (arg[0] != '-') {
|
|
ok_paths = &argv[i];
|
|
break;
|
|
}
|
|
|
|
usage(daemon_usage);
|
|
}
|
|
|
|
if (log_syslog) {
|
|
openlog("git-daemon", LOG_PID, LOG_DAEMON);
|
|
set_die_routine(daemon_die);
|
|
} else
|
|
/* avoid splitting a message in the middle */
|
|
setvbuf(stderr, NULL, _IOFBF, 4096);
|
|
|
|
if (inetd_mode && (detach || group_name || user_name))
|
|
die("--detach, --user and --group are incompatible with --inetd");
|
|
|
|
if (inetd_mode && (listen_port || (listen_addr.nr > 0)))
|
|
die("--listen= and --port= are incompatible with --inetd");
|
|
else if (listen_port == 0)
|
|
listen_port = DEFAULT_GIT_PORT;
|
|
|
|
if (group_name && !user_name)
|
|
die("--group supplied without --user");
|
|
|
|
if (user_name)
|
|
cred = prepare_credentials(user_name, group_name);
|
|
|
|
if (strict_paths && (!ok_paths || !*ok_paths))
|
|
die("option --strict-paths requires a whitelist");
|
|
|
|
if (base_path && !is_directory(base_path))
|
|
die("base-path '%s' does not exist or is not a directory",
|
|
base_path);
|
|
|
|
if (inetd_mode) {
|
|
if (!freopen("/dev/null", "w", stderr))
|
|
die_errno("failed to redirect stderr to /dev/null");
|
|
}
|
|
|
|
if (inetd_mode || serve_mode)
|
|
return execute();
|
|
|
|
if (detach) {
|
|
daemonize();
|
|
loginfo("Ready to rumble");
|
|
}
|
|
else
|
|
sanitize_stdfds();
|
|
|
|
if (pid_file)
|
|
store_pid(pid_file);
|
|
|
|
/* prepare argv for serving-processes */
|
|
cld_argv = xmalloc(sizeof (char *) * (argc + 2));
|
|
cld_argv[0] = argv[0]; /* git-daemon */
|
|
cld_argv[1] = "--serve";
|
|
for (i = 1; i < argc; ++i)
|
|
cld_argv[i+1] = argv[i];
|
|
cld_argv[argc+1] = NULL;
|
|
|
|
return serve(&listen_addr, listen_port, cred);
|
|
}
|