1*f58bfe4fSflorian /* $OpenBSD: slowcgi.c,v 1.40 2014/12/05 20:01:39 florian Exp $ */ 27ac15270Sflorian /* 37ac15270Sflorian * Copyright (c) 2013 David Gwynne <dlg@openbsd.org> 47ac15270Sflorian * Copyright (c) 2013 Florian Obser <florian@openbsd.org> 57ac15270Sflorian * 67ac15270Sflorian * Permission to use, copy, modify, and distribute this software for any 77ac15270Sflorian * purpose with or without fee is hereby granted, provided that the above 87ac15270Sflorian * copyright notice and this permission notice appear in all copies. 97ac15270Sflorian * 107ac15270Sflorian * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 117ac15270Sflorian * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 127ac15270Sflorian * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 137ac15270Sflorian * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 147ac15270Sflorian * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 157ac15270Sflorian * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 167ac15270Sflorian * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 177ac15270Sflorian */ 187ac15270Sflorian 197ac15270Sflorian #include <sys/types.h> 207ac15270Sflorian #include <sys/ioctl.h> 217ac15270Sflorian #include <sys/queue.h> 227ac15270Sflorian #include <sys/socket.h> 237ac15270Sflorian #include <sys/socketvar.h> 247ac15270Sflorian #include <sys/stat.h> 257ac15270Sflorian #include <sys/un.h> 267ac15270Sflorian #include <sys/wait.h> 277ac15270Sflorian #include <err.h> 2894ee156dSflorian #include <fcntl.h> 297ac15270Sflorian #include <ctype.h> 307ac15270Sflorian #include <errno.h> 317ac15270Sflorian #include <event.h> 327ac15270Sflorian #include <netdb.h> 337ac15270Sflorian #include <pwd.h> 347ac15270Sflorian #include <signal.h> 357ac15270Sflorian #include <stdio.h> 367ac15270Sflorian #include <stdlib.h> 377ac15270Sflorian #include <string.h> 387ac15270Sflorian #include <syslog.h> 397ac15270Sflorian #include <unistd.h> 407ac15270Sflorian 417ac15270Sflorian #define TIMEOUT_DEFAULT 120 427ac15270Sflorian #define SLOWCGI_USER "www" 430ee0284dSblambert 440ee0284dSblambert #define FCGI_CONTENT_SIZE 65535 450ee0284dSblambert #define FCGI_PADDING_SIZE 255 460ee0284dSblambert #define FCGI_RECORD_SIZE \ 470ee0284dSblambert (sizeof(struct fcgi_record_header) + FCGI_CONTENT_SIZE + FCGI_PADDING_SIZE) 480ee0284dSblambert 497ac15270Sflorian #define STDOUT_DONE 1 507ac15270Sflorian #define STDERR_DONE 2 517ac15270Sflorian #define SCRIPT_DONE 4 527ac15270Sflorian 537ac15270Sflorian #define FCGI_BEGIN_REQUEST 1 547ac15270Sflorian #define FCGI_ABORT_REQUEST 2 557ac15270Sflorian #define FCGI_END_REQUEST 3 567ac15270Sflorian #define FCGI_PARAMS 4 577ac15270Sflorian #define FCGI_STDIN 5 587ac15270Sflorian #define FCGI_STDOUT 6 597ac15270Sflorian #define FCGI_STDERR 7 607ac15270Sflorian #define FCGI_DATA 8 617ac15270Sflorian #define FCGI_GET_VALUES 9 627ac15270Sflorian #define FCGI_GET_VALUES_RESULT 10 637ac15270Sflorian #define FCGI_UNKNOWN_TYPE 11 647ac15270Sflorian #define FCGI_MAXTYPE (FCGI_UNKNOWN_TYPE) 657ac15270Sflorian 667ac15270Sflorian #define FCGI_REQUEST_COMPLETE 0 677ac15270Sflorian #define FCGI_CANT_MPX_CONN 1 687ac15270Sflorian #define FCGI_OVERLOADED 2 697ac15270Sflorian #define FCGI_UNKNOWN_ROLE 3 707ac15270Sflorian 713f9f8982Sbenno #define FD_RESERVE 5 723f9f8982Sbenno #define FD_NEEDED 6 73d2b70008Sflorian int cgi_inflight = 0; 747ac15270Sflorian 757ac15270Sflorian struct listener { 767ac15270Sflorian struct event ev, pause; 777ac15270Sflorian }; 787ac15270Sflorian 797ac15270Sflorian struct env_val { 807ac15270Sflorian SLIST_ENTRY(env_val) entry; 817ac15270Sflorian char *val; 827ac15270Sflorian }; 837ac15270Sflorian SLIST_HEAD(env_head, env_val); 847ac15270Sflorian 857ac15270Sflorian struct fcgi_record_header { 867ac15270Sflorian uint8_t version; 877ac15270Sflorian uint8_t type; 887ac15270Sflorian uint16_t id; 897ac15270Sflorian uint16_t content_len; 907ac15270Sflorian uint8_t padding_len; 917ac15270Sflorian uint8_t reserved; 927ac15270Sflorian }__packed; 937ac15270Sflorian 947ac15270Sflorian struct fcgi_response { 957ac15270Sflorian TAILQ_ENTRY(fcgi_response) entry; 960ee0284dSblambert uint8_t data[FCGI_RECORD_SIZE]; 977ac15270Sflorian size_t data_pos; 987ac15270Sflorian size_t data_len; 997ac15270Sflorian }; 1007ac15270Sflorian TAILQ_HEAD(fcgi_response_head, fcgi_response); 1017ac15270Sflorian 1027ac15270Sflorian struct fcgi_stdin { 1037ac15270Sflorian TAILQ_ENTRY(fcgi_stdin) entry; 1047ac15270Sflorian uint8_t data[FCGI_RECORD_SIZE]; 1057ac15270Sflorian size_t data_pos; 1067ac15270Sflorian size_t data_len; 1077ac15270Sflorian }; 1087ac15270Sflorian TAILQ_HEAD(fcgi_stdin_head, fcgi_stdin); 1097ac15270Sflorian 110c3b13bc8Sblambert struct request { 1117ac15270Sflorian struct event ev; 1127ac15270Sflorian struct event resp_ev; 1137ac15270Sflorian struct event tmo; 1147ac15270Sflorian int fd; 1157ac15270Sflorian uint8_t buf[FCGI_RECORD_SIZE]; 1167ac15270Sflorian size_t buf_pos; 1177ac15270Sflorian size_t buf_len; 1187ac15270Sflorian struct fcgi_response_head response_head; 1197ac15270Sflorian struct fcgi_stdin_head stdin_head; 1207ac15270Sflorian uint16_t id; 1217ac15270Sflorian char script_name[MAXPATHLEN]; 1227ac15270Sflorian struct env_head env; 1237ac15270Sflorian int env_count; 1247ac15270Sflorian pid_t script_pid; 1257ac15270Sflorian int script_status; 1267ac15270Sflorian struct event script_ev; 1277ac15270Sflorian struct event script_err_ev; 1287ac15270Sflorian struct event script_stdin_ev; 1296bdc2311Sflorian int stdin_fd_closed; 1306bdc2311Sflorian int stdout_fd_closed; 1316bdc2311Sflorian int stderr_fd_closed; 1327ac15270Sflorian uint8_t script_flags; 1337ac15270Sflorian uint8_t request_started; 1343f9f8982Sbenno int inflight_fds_accounted; 1357ac15270Sflorian }; 1367ac15270Sflorian 137c3b13bc8Sblambert struct requests { 138c3b13bc8Sblambert SLIST_ENTRY(requests) entry; 139c3b13bc8Sblambert struct request *request; 1407ac15270Sflorian }; 141c3b13bc8Sblambert SLIST_HEAD(requests_head, requests); 1427ac15270Sflorian 1437ac15270Sflorian struct slowcgi_proc { 144c3b13bc8Sblambert struct requests_head requests; 1457ac15270Sflorian struct event ev_sigchld; 1467ac15270Sflorian struct event ev_sigpipe; 1477ac15270Sflorian }; 1487ac15270Sflorian 1497ac15270Sflorian struct fcgi_begin_request_body { 1507ac15270Sflorian uint16_t role; 1517ac15270Sflorian uint8_t flags; 1527ac15270Sflorian uint8_t reserved[5]; 1537ac15270Sflorian }__packed; 1547ac15270Sflorian 15503e61f17Sblambert struct fcgi_end_request_body { 1567ac15270Sflorian uint32_t app_status; 1577ac15270Sflorian uint8_t protocol_status; 1587ac15270Sflorian uint8_t reserved[3]; 1597ac15270Sflorian }__packed; 16003e61f17Sblambert 1617ac15270Sflorian __dead void usage(void); 162f6474c66Sflorian void slowcgi_listen(char *, struct passwd *); 1637ac15270Sflorian void slowcgi_paused(int, short, void *); 1643f9f8982Sbenno int accept_reserve(int, struct sockaddr *, socklen_t *, int, 1653f9f8982Sbenno volatile int *); 1667ac15270Sflorian void slowcgi_accept(int, short, void *); 1677ac15270Sflorian void slowcgi_request(int, short, void *); 1687ac15270Sflorian void slowcgi_response(int, short, void *); 1694404b4d5Sflorian void slowcgi_add_response(struct request *, struct fcgi_response *); 1707ac15270Sflorian void slowcgi_timeout(int, short, void *); 1717ac15270Sflorian void slowcgi_sig_handler(int, short, void *); 172c3b13bc8Sblambert size_t parse_record(uint8_t * , size_t, struct request *); 173c3b13bc8Sblambert void parse_begin_request(uint8_t *, uint16_t, struct request *, 1747ac15270Sflorian uint16_t); 175c3b13bc8Sblambert void parse_params(uint8_t *, uint16_t, struct request *, uint16_t); 176c3b13bc8Sblambert void parse_stdin(uint8_t *, uint16_t, struct request *, uint16_t); 177c3b13bc8Sblambert void exec_cgi(struct request *); 178c3b13bc8Sblambert void script_in(int, struct event *, struct request *, uint8_t); 1797ac15270Sflorian void script_std_in(int, short, void *); 1807ac15270Sflorian void script_err_in(int, short, void *); 1817ac15270Sflorian void script_out(int, short, void *); 182c3b13bc8Sblambert void create_end_record(struct request *); 18303e61f17Sblambert void dump_fcgi_record(const char *, 18403e61f17Sblambert struct fcgi_record_header *); 1857ac15270Sflorian void dump_fcgi_record_header(const char *, 1867ac15270Sflorian struct fcgi_record_header *); 18703e61f17Sblambert void dump_fcgi_begin_request_body(const char *, 18803e61f17Sblambert struct fcgi_begin_request_body *); 18903e61f17Sblambert void dump_fcgi_end_request_body(const char *, 19003e61f17Sblambert struct fcgi_end_request_body *); 191c3b13bc8Sblambert void cleanup_request(struct request *); 19203e61f17Sblambert 1937ac15270Sflorian struct loggers { 194d0a52cffSflorian __dead void (*err)(int, const char *, ...); 195d0a52cffSflorian __dead void (*errx)(int, const char *, ...); 1967ac15270Sflorian void (*warn)(const char *, ...); 1977ac15270Sflorian void (*warnx)(const char *, ...); 1987ac15270Sflorian void (*info)(const char *, ...); 1997ac15270Sflorian void (*debug)(const char *, ...); 2007ac15270Sflorian }; 2017ac15270Sflorian 2027ac15270Sflorian const struct loggers conslogger = { 2037ac15270Sflorian err, 2047ac15270Sflorian errx, 2057ac15270Sflorian warn, 2067ac15270Sflorian warnx, 2077ac15270Sflorian warnx, /* info */ 2087ac15270Sflorian warnx /* debug */ 2097ac15270Sflorian }; 2107ac15270Sflorian 211d0a52cffSflorian __dead void syslog_err(int, const char *, ...); 212d0a52cffSflorian __dead void syslog_errx(int, const char *, ...); 2137ac15270Sflorian void syslog_warn(const char *, ...); 2147ac15270Sflorian void syslog_warnx(const char *, ...); 2157ac15270Sflorian void syslog_info(const char *, ...); 2167ac15270Sflorian void syslog_debug(const char *, ...); 2177ac15270Sflorian void syslog_vstrerror(int, int, const char *, va_list); 2187ac15270Sflorian 2197ac15270Sflorian const struct loggers syslogger = { 2207ac15270Sflorian syslog_err, 2217ac15270Sflorian syslog_errx, 2227ac15270Sflorian syslog_warn, 2237ac15270Sflorian syslog_warnx, 2247ac15270Sflorian syslog_info, 2257ac15270Sflorian syslog_debug 2267ac15270Sflorian }; 2277ac15270Sflorian 2287ac15270Sflorian const struct loggers *logger = &conslogger; 2297ac15270Sflorian 2307ac15270Sflorian #define lerr(_e, _f...) logger->err((_e), _f) 2317ac15270Sflorian #define lerrx(_e, _f...) logger->errx((_e), _f) 2327ac15270Sflorian #define lwarn(_f...) logger->warn(_f) 2337ac15270Sflorian #define lwarnx(_f...) logger->warnx(_f) 2347ac15270Sflorian #define linfo(_f...) logger->info(_f) 2357ac15270Sflorian #define ldebug(_f...) logger->debug(_f) 2367ac15270Sflorian 2377ac15270Sflorian __dead void 2387ac15270Sflorian usage(void) 2397ac15270Sflorian { 2407ac15270Sflorian extern char *__progname; 241a3b046bcSflorian fprintf(stderr, "usage: %s [-d] [-p path] [-s socket] [-u user]\n", 242a3b046bcSflorian __progname); 2437ac15270Sflorian exit(1); 2447ac15270Sflorian } 2457ac15270Sflorian 2467ac15270Sflorian struct timeval timeout = { TIMEOUT_DEFAULT, 0 }; 2477ac15270Sflorian struct slowcgi_proc slowcgi_proc; 2487ac15270Sflorian int debug = 0; 2497ac15270Sflorian int on = 1; 2500b5ee19eSblambert char *fcgi_socket = "/var/www/run/slowcgi.sock"; 2517ac15270Sflorian 2527ac15270Sflorian int 2537ac15270Sflorian main(int argc, char *argv[]) 2547ac15270Sflorian { 25506619349Sflorian extern char *__progname; 2567ac15270Sflorian struct passwd *pw; 257f4a8b980Sflorian struct stat sb; 258f4a8b980Sflorian int c, fd; 259a3b046bcSflorian const char *chrootpath = NULL; 260a3b046bcSflorian const char *slowcgi_user = SLOWCGI_USER; 261f4a8b980Sflorian 262f4a8b980Sflorian /* 263f4a8b980Sflorian * Ensure we have fds 0-2 open so that we have no fd overlaps 264f4a8b980Sflorian * in exec_cgi() later. Just exit on error, we don't have enough 265f4a8b980Sflorian * fds open to output an error message anywhere. 266f4a8b980Sflorian */ 267f4a8b980Sflorian for (c=0; c < 3; c++) { 268f4a8b980Sflorian if (fstat(c, &sb) == -1) { 269f4a8b980Sflorian if ((fd = open("/dev/null", O_RDWR)) != -1) { 270f4a8b980Sflorian if (dup2(fd, c) == -1) 271f4a8b980Sflorian exit(1); 272f4a8b980Sflorian if (fd > c) 273f4a8b980Sflorian close(fd); 274f4a8b980Sflorian } else 275f4a8b980Sflorian exit(1); 276f4a8b980Sflorian } 277f4a8b980Sflorian } 2787ac15270Sflorian 279a3b046bcSflorian while ((c = getopt(argc, argv, "dp:s:u:")) != -1) { 2807ac15270Sflorian switch (c) { 2817ac15270Sflorian case 'd': 2827ac15270Sflorian debug = 1; 2837ac15270Sflorian break; 284a3b046bcSflorian case 'p': 285a3b046bcSflorian chrootpath = optarg; 286a3b046bcSflorian break; 2870b5ee19eSblambert case 's': 2880b5ee19eSblambert fcgi_socket = optarg; 2890b5ee19eSblambert break; 290a3b046bcSflorian case 'u': 291a3b046bcSflorian slowcgi_user = optarg; 292a3b046bcSflorian break; 2937ac15270Sflorian default: 2947ac15270Sflorian usage(); 2957ac15270Sflorian /* NOTREACHED */ 2967ac15270Sflorian } 2977ac15270Sflorian } 2987ac15270Sflorian 2997ac15270Sflorian if (geteuid() != 0) 3007ac15270Sflorian errx(1, "need root privileges"); 3017ac15270Sflorian 3027ac15270Sflorian if (!debug && daemon(1, 0) == -1) 3037ac15270Sflorian err(1, "daemon"); 3047ac15270Sflorian 30506619349Sflorian if (!debug) { 30606619349Sflorian openlog(__progname, LOG_PID|LOG_NDELAY, LOG_DAEMON); 30706619349Sflorian logger = &syslogger; 30806619349Sflorian } 30906619349Sflorian 3107ac15270Sflorian event_init(); 3117ac15270Sflorian 312a3b046bcSflorian pw = getpwnam(SLOWCGI_USER); 313a3b046bcSflorian if (pw == NULL) 3146af1d02fSclaudio lerrx(1, "no %s user", SLOWCGI_USER); 315a3b046bcSflorian 316f6474c66Sflorian slowcgi_listen(fcgi_socket, pw); 3170b5ee19eSblambert 318a3b046bcSflorian lwarnx("slowcgi_user: %s", slowcgi_user); 319a3b046bcSflorian pw = getpwnam(slowcgi_user); 320a3b046bcSflorian if (pw == NULL) 3216af1d02fSclaudio lerrx(1, "no %s user", slowcgi_user); 322a3b046bcSflorian 323a3b046bcSflorian if (chrootpath == NULL) 324a3b046bcSflorian chrootpath = pw->pw_dir; 325a3b046bcSflorian 326a3b046bcSflorian if (chroot(chrootpath) == -1) 327a3b046bcSflorian lerr(1, "chroot(%s)", chrootpath); 328a3b046bcSflorian 329a3b046bcSflorian ldebug("chroot: %s", chrootpath); 3307ac15270Sflorian 3317ac15270Sflorian if (chdir("/") == -1) 332a3b046bcSflorian lerr(1, "chdir(/)"); 333bde99fd8Sblambert 3347ac15270Sflorian if (setgroups(1, &pw->pw_gid) || 3357ac15270Sflorian setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || 3367ac15270Sflorian setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) 3377ac15270Sflorian lerr(1, "unable to revoke privs"); 3387ac15270Sflorian 339c3b13bc8Sblambert SLIST_INIT(&slowcgi_proc.requests); 3407ac15270Sflorian 3417ac15270Sflorian signal_set(&slowcgi_proc.ev_sigchld, SIGCHLD, slowcgi_sig_handler, 3427ac15270Sflorian &slowcgi_proc); 3437ac15270Sflorian signal_set(&slowcgi_proc.ev_sigpipe, SIGPIPE, slowcgi_sig_handler, 3447ac15270Sflorian &slowcgi_proc); 3457ac15270Sflorian 3467ac15270Sflorian signal_add(&slowcgi_proc.ev_sigchld, NULL); 3477ac15270Sflorian signal_add(&slowcgi_proc.ev_sigpipe, NULL); 3487ac15270Sflorian 3497ac15270Sflorian event_dispatch(); 3507ac15270Sflorian return (0); 3517ac15270Sflorian } 3527ac15270Sflorian void 353f6474c66Sflorian slowcgi_listen(char *path, struct passwd *pw) 3547ac15270Sflorian { 3557ac15270Sflorian struct listener *l = NULL; 3567ac15270Sflorian struct sockaddr_un sun; 3574b4315eeSflorian size_t len; 358d0c661abSflorian mode_t old_umask; 3597ac15270Sflorian int fd; 3607ac15270Sflorian 361d253f95aSflorian if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 362d253f95aSflorian 0)) == -1) 3637ac15270Sflorian lerr(1, "slowcgi_listen: socket"); 3647ac15270Sflorian 3657ac15270Sflorian bzero(&sun, sizeof(sun)); 3667ac15270Sflorian sun.sun_family = AF_UNIX; 3674b4315eeSflorian len = strlcpy(sun.sun_path, path, sizeof(sun.sun_path)); 3684b4315eeSflorian if (len >= sizeof(sun.sun_path)) 3694b4315eeSflorian lerrx(1, "socket path to long"); 3704b4315eeSflorian sun.sun_len = len; 3717ac15270Sflorian 3727ac15270Sflorian if (unlink(path) == -1) 3737ac15270Sflorian if (errno != ENOENT) 3747ac15270Sflorian lerr(1, "slowcgi_listen: unlink %s", path); 3757ac15270Sflorian 376f6474c66Sflorian old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH| 377f6474c66Sflorian S_IXOTH); 3787ac15270Sflorian 3797ac15270Sflorian if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) 3807ac15270Sflorian lerr(1,"slowcgi_listen: bind: %s", path); 3817ac15270Sflorian 3827ac15270Sflorian umask(old_umask); 3837ac15270Sflorian 384f6474c66Sflorian if (chown(path, pw->pw_uid, pw->pw_gid) == -1) 3857ac15270Sflorian lerr(1, "slowcgi_listen: chown: %s", path); 3867ac15270Sflorian 3877ac15270Sflorian if (listen(fd, 5) == -1) 3887ac15270Sflorian lerr(1, "listen"); 3897ac15270Sflorian 3907ac15270Sflorian l = calloc(1, sizeof(*l)); 3917ac15270Sflorian if (l == NULL) 3927ac15270Sflorian lerr(1, "listener ev alloc"); 3937ac15270Sflorian 3947ac15270Sflorian event_set(&l->ev, fd, EV_READ | EV_PERSIST, slowcgi_accept, l); 3957ac15270Sflorian event_add(&l->ev, NULL); 3967ac15270Sflorian evtimer_set(&l->pause, slowcgi_paused, l); 397bde99fd8Sblambert 398bde99fd8Sblambert ldebug("socket: %s", path); 3997ac15270Sflorian } 4007ac15270Sflorian 4017ac15270Sflorian void 4027ac15270Sflorian slowcgi_paused(int fd, short events, void *arg) 4037ac15270Sflorian { 4047ac15270Sflorian struct listener *l = arg; 4057ac15270Sflorian event_add(&l->ev, NULL); 4067ac15270Sflorian } 4077ac15270Sflorian 4083f9f8982Sbenno int 4093f9f8982Sbenno accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen, 4103f9f8982Sbenno int reserve, volatile int *counter) 4113f9f8982Sbenno { 4123f9f8982Sbenno int ret; 4133f9f8982Sbenno if (getdtablecount() + reserve + 4143f9f8982Sbenno (*counter * FD_NEEDED) >= getdtablesize()) { 415f8701677Sderaadt ldebug("inflight fds exceeded"); 4163f9f8982Sbenno errno = EMFILE; 4173f9f8982Sbenno return -1; 4183f9f8982Sbenno } 4193f9f8982Sbenno 420d253f95aSflorian if ((ret = accept4(sockfd, addr, addrlen, SOCK_NONBLOCK | SOCK_CLOEXEC)) 421d253f95aSflorian > -1) { 4223f9f8982Sbenno (*counter)++; 4233f9f8982Sbenno ldebug("inflight incremented, now %d", *counter); 4243f9f8982Sbenno } 4253f9f8982Sbenno return ret; 4263f9f8982Sbenno } 4273f9f8982Sbenno 4287ac15270Sflorian void 4297ac15270Sflorian slowcgi_accept(int fd, short events, void *arg) 4307ac15270Sflorian { 4317ac15270Sflorian struct listener *l; 4327ac15270Sflorian struct sockaddr_storage ss; 433adf2d9e3Sflorian struct timeval backoff; 434c3b13bc8Sblambert struct request *c; 435c3b13bc8Sblambert struct requests *requests; 4367ac15270Sflorian socklen_t len; 4377ac15270Sflorian int s; 4387ac15270Sflorian 4397ac15270Sflorian l = arg; 440adf2d9e3Sflorian backoff.tv_sec = 1; 441adf2d9e3Sflorian backoff.tv_usec = 0; 4427ac15270Sflorian c = NULL; 4437ac15270Sflorian 4447ac15270Sflorian len = sizeof(ss); 4453f9f8982Sbenno if ((s = accept_reserve(fd, (struct sockaddr *)&ss, 4463f9f8982Sbenno &len, FD_RESERVE, &cgi_inflight)) == -1) { 4477ac15270Sflorian switch (errno) { 4487ac15270Sflorian case EINTR: 4497ac15270Sflorian case EWOULDBLOCK: 4507ac15270Sflorian case ECONNABORTED: 4517ac15270Sflorian return; 4527ac15270Sflorian case EMFILE: 4537ac15270Sflorian case ENFILE: 4547ac15270Sflorian event_del(&l->ev); 455adf2d9e3Sflorian evtimer_add(&l->pause, &backoff); 4567ac15270Sflorian return; 4577ac15270Sflorian default: 4587ac15270Sflorian lerr(1, "accept"); 4597ac15270Sflorian } 4607ac15270Sflorian } 4617ac15270Sflorian 4627ac15270Sflorian c = calloc(1, sizeof(*c)); 4637ac15270Sflorian if (c == NULL) { 464c3b13bc8Sblambert lwarn("cannot calloc request"); 4657ac15270Sflorian close(s); 4663f9f8982Sbenno cgi_inflight--; 4677ac15270Sflorian return; 4687ac15270Sflorian } 469c3b13bc8Sblambert requests = calloc(1, sizeof(*requests)); 470c3b13bc8Sblambert if (requests == NULL) { 471c3b13bc8Sblambert lwarn("cannot calloc requests"); 4727ac15270Sflorian close(s); 4733f9f8982Sbenno cgi_inflight--; 4747ac15270Sflorian free(c); 4757ac15270Sflorian return; 4767ac15270Sflorian } 4777ac15270Sflorian c->fd = s; 4787ac15270Sflorian c->buf_pos = 0; 4797ac15270Sflorian c->buf_len = 0; 4807ac15270Sflorian c->request_started = 0; 4816bdc2311Sflorian c->stdin_fd_closed = c->stdout_fd_closed = c->stderr_fd_closed = 0; 4823f9f8982Sbenno c->inflight_fds_accounted = 0; 4837ac15270Sflorian TAILQ_INIT(&c->response_head); 4847ac15270Sflorian TAILQ_INIT(&c->stdin_head); 4857ac15270Sflorian 4867ac15270Sflorian event_set(&c->ev, s, EV_READ | EV_PERSIST, slowcgi_request, c); 4877ac15270Sflorian event_add(&c->ev, NULL); 4884404b4d5Sflorian event_set(&c->resp_ev, s, EV_WRITE | EV_PERSIST, slowcgi_response, c); 4897ac15270Sflorian event_set(&c->tmo, s, 0, slowcgi_timeout, c); 4907ac15270Sflorian event_add(&c->tmo, &timeout); 491c3b13bc8Sblambert requests->request = c; 492c3b13bc8Sblambert SLIST_INSERT_HEAD(&slowcgi_proc.requests, requests, entry); 4937ac15270Sflorian } 4947ac15270Sflorian 4957ac15270Sflorian void 4967ac15270Sflorian slowcgi_timeout(int fd, short events, void *arg) 4977ac15270Sflorian { 498c3b13bc8Sblambert cleanup_request((struct request*) arg); 4997ac15270Sflorian } 5007ac15270Sflorian 5017ac15270Sflorian void 5027ac15270Sflorian slowcgi_sig_handler(int sig, short event, void *arg) 5037ac15270Sflorian { 504c3b13bc8Sblambert struct request *c; 505c3b13bc8Sblambert struct requests *ncs; 5067ac15270Sflorian struct slowcgi_proc *p; 5077ac15270Sflorian pid_t pid; 5087ac15270Sflorian int status; 5097ac15270Sflorian 5107ac15270Sflorian p = arg; 5117ac15270Sflorian 5127ac15270Sflorian switch (sig) { 5137ac15270Sflorian case SIGCHLD: 5141878c91fSdjm while((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) { 515e0571d83Sflorian c = NULL; 516c3b13bc8Sblambert SLIST_FOREACH(ncs, &p->requests, entry) 517c3b13bc8Sblambert if (ncs->request->script_pid == pid) { 518c3b13bc8Sblambert c = ncs->request; 5197ac15270Sflorian break; 5207ac15270Sflorian } 521bde99fd8Sblambert if (c == NULL) { 522bde99fd8Sblambert lwarnx("caught exit of unknown child %i", pid); 523e0571d83Sflorian continue; 524bde99fd8Sblambert } 525bde99fd8Sblambert 526bde99fd8Sblambert if (WIFSIGNALED(status)) 527bde99fd8Sblambert c->script_status = WTERMSIG(status); 528bde99fd8Sblambert else 5297ac15270Sflorian c->script_status = WEXITSTATUS(status); 530bde99fd8Sblambert 5317ac15270Sflorian if (c->script_flags == (STDOUT_DONE | STDERR_DONE)) 532c3b13bc8Sblambert create_end_record(c); 5337ac15270Sflorian c->script_flags |= SCRIPT_DONE; 534bde99fd8Sblambert 535bde99fd8Sblambert ldebug("wait: %s", c->script_name); 536e0571d83Sflorian } 5371878c91fSdjm if (pid == -1 && errno != ECHILD) 5381878c91fSdjm lwarn("waitpid"); 539bde99fd8Sblambert break; 5407ac15270Sflorian case SIGPIPE: 5417ac15270Sflorian /* ignore */ 5427ac15270Sflorian break; 5437ac15270Sflorian default: 5447ac15270Sflorian lerr(1, "unexpected signal: %d", sig); 545f8701677Sderaadt break; 5467ac15270Sflorian } 5477ac15270Sflorian } 5487ac15270Sflorian 5497ac15270Sflorian void 5504404b4d5Sflorian slowcgi_add_response(struct request *c, struct fcgi_response *resp) 5514404b4d5Sflorian { 5524404b4d5Sflorian TAILQ_INSERT_TAIL(&c->response_head, resp, entry); 5534404b4d5Sflorian event_add(&c->resp_ev, NULL); 5544404b4d5Sflorian } 5554404b4d5Sflorian 5564404b4d5Sflorian void 5577ac15270Sflorian slowcgi_response(int fd, short events, void *arg) 5587ac15270Sflorian { 559c3b13bc8Sblambert struct request *c; 5607ac15270Sflorian struct fcgi_record_header *header; 5617ac15270Sflorian struct fcgi_response *resp; 5627ac15270Sflorian ssize_t n; 5637ac15270Sflorian 5647ac15270Sflorian c = arg; 5657ac15270Sflorian 5667ac15270Sflorian while ((resp = TAILQ_FIRST(&c->response_head))) { 5677ac15270Sflorian header = (struct fcgi_record_header*) resp->data; 5687ac15270Sflorian if (debug) 56903e61f17Sblambert dump_fcgi_record("resp ", header); 5707ac15270Sflorian 5717ac15270Sflorian n = write(fd, resp->data + resp->data_pos, resp->data_len); 5727ac15270Sflorian if (n == -1) { 57314379226Sflorian if (errno == EAGAIN || errno == EINTR) 5747ac15270Sflorian return; 575c3b13bc8Sblambert cleanup_request(c); 5767ac15270Sflorian return; 5777ac15270Sflorian } 5787ac15270Sflorian resp->data_pos += n; 5797ac15270Sflorian resp->data_len -= n; 5807ac15270Sflorian if (resp->data_len == 0) { 5817ac15270Sflorian TAILQ_REMOVE(&c->response_head, resp, entry); 5827ac15270Sflorian free(resp); 5837ac15270Sflorian } 5847ac15270Sflorian } 5857ac15270Sflorian 5867ac15270Sflorian if (TAILQ_EMPTY(&c->response_head)) { 5877ac15270Sflorian if (c->script_flags == (STDOUT_DONE | STDERR_DONE | 5887ac15270Sflorian SCRIPT_DONE)) 589c3b13bc8Sblambert cleanup_request(c); 5907ac15270Sflorian else 5917ac15270Sflorian event_del(&c->resp_ev); 5927ac15270Sflorian } 5937ac15270Sflorian } 5947ac15270Sflorian 5957ac15270Sflorian void 5967ac15270Sflorian slowcgi_request(int fd, short events, void *arg) 5977ac15270Sflorian { 598c3b13bc8Sblambert struct request *c; 5997ac15270Sflorian size_t n, parsed; 6007ac15270Sflorian 6017ac15270Sflorian c = arg; 6027ac15270Sflorian 6037ac15270Sflorian n = read(fd, c->buf + c->buf_pos + c->buf_len, 6047ac15270Sflorian FCGI_RECORD_SIZE - c->buf_pos-c->buf_len); 6057ac15270Sflorian 6067ac15270Sflorian switch (n) { 6077ac15270Sflorian case -1: 6087ac15270Sflorian switch (errno) { 6097ac15270Sflorian case EINTR: 6107ac15270Sflorian case EAGAIN: 6117ac15270Sflorian return; 6127ac15270Sflorian default: 6137ac15270Sflorian goto fail; 6147ac15270Sflorian } 6157ac15270Sflorian break; 6167ac15270Sflorian 6177ac15270Sflorian case 0: 6187ac15270Sflorian ldebug("closed connection"); 6197ac15270Sflorian goto fail; 6207ac15270Sflorian default: 6217ac15270Sflorian break; 6227ac15270Sflorian } 6237ac15270Sflorian 6247ac15270Sflorian c->buf_len += n; 6257ac15270Sflorian 62602ad6491Sblambert /* 62702ad6491Sblambert * Parse the records as they are received. Per the FastCGI 62802ad6491Sblambert * specification, the server need only receive the FastCGI 62902ad6491Sblambert * parameter records in full; it is free to begin execution 63002ad6491Sblambert * at that point, which is what happens here. 63102ad6491Sblambert */ 6327ac15270Sflorian do { 633c3b13bc8Sblambert parsed = parse_record(c->buf + c->buf_pos, c->buf_len, c); 6347ac15270Sflorian c->buf_pos += parsed; 6357ac15270Sflorian c->buf_len -= parsed; 6367ac15270Sflorian } while (parsed > 0 && c->buf_len > 0); 6377ac15270Sflorian 638965b2218Sblambert /* Make space for further reads */ 6397ac15270Sflorian if (c->buf_len > 0) { 6407ac15270Sflorian bcopy(c->buf + c->buf_pos, c->buf, c->buf_len); 6417ac15270Sflorian c->buf_pos = 0; 6427ac15270Sflorian } 6437ac15270Sflorian return; 6447ac15270Sflorian fail: 645c3b13bc8Sblambert cleanup_request(c); 6467ac15270Sflorian } 6477ac15270Sflorian 6487ac15270Sflorian void 649c3b13bc8Sblambert parse_begin_request(uint8_t *buf, uint16_t n, struct request *c, uint16_t id) 6507ac15270Sflorian { 651965b2218Sblambert /* XXX -- FCGI_CANT_MPX_CONN */ 6527ac15270Sflorian if (c->request_started) { 6537ac15270Sflorian lwarnx("unexpected FCGI_BEGIN_REQUEST, ignoring"); 6547ac15270Sflorian return; 6557ac15270Sflorian } 6567ac15270Sflorian 6577ac15270Sflorian if (n != sizeof(struct fcgi_begin_request_body)) { 6587ac15270Sflorian lwarnx("wrong size %d != %d", n, 6597ac15270Sflorian sizeof(struct fcgi_begin_request_body)); 6607ac15270Sflorian return; 6617ac15270Sflorian } 6627ac15270Sflorian 6637ac15270Sflorian c->request_started = 1; 6647ac15270Sflorian 6657ac15270Sflorian c->id = id; 6667ac15270Sflorian SLIST_INIT(&c->env); 6677ac15270Sflorian c->env_count = 0; 6687ac15270Sflorian } 6697ac15270Sflorian void 670c3b13bc8Sblambert parse_params(uint8_t *buf, uint16_t n, struct request *c, uint16_t id) 6717ac15270Sflorian { 6727ac15270Sflorian struct env_val *env_entry; 6737ac15270Sflorian uint32_t name_len, val_len; 6747ac15270Sflorian 6757ac15270Sflorian if (!c->request_started) { 6767ac15270Sflorian lwarnx("FCGI_PARAMS without FCGI_BEGIN_REQUEST, ignoring"); 6777ac15270Sflorian return; 6787ac15270Sflorian } 6797ac15270Sflorian 6807ac15270Sflorian if (c->id != id) { 6817ac15270Sflorian lwarnx("unexpected id, ignoring"); 6827ac15270Sflorian return; 6837ac15270Sflorian } 6847ac15270Sflorian 68502ad6491Sblambert /* 68602ad6491Sblambert * If this is the last FastCGI parameter record, 68702ad6491Sblambert * begin execution of the CGI script. 68802ad6491Sblambert */ 6897ac15270Sflorian if (n == 0) { 6907ac15270Sflorian exec_cgi(c); 6917ac15270Sflorian return; 6927ac15270Sflorian } 69302ad6491Sblambert 6947ac15270Sflorian while (n > 0) { 6957ac15270Sflorian if (buf[0] >> 7 == 0) { 6967ac15270Sflorian name_len = buf[0]; 6977ac15270Sflorian n--; 6987ac15270Sflorian buf++; 6997ac15270Sflorian } else { 7007ac15270Sflorian if (n > 3) { 70110fd764fSflorian name_len = ((buf[0] & 0x7f) << 24) + 70210fd764fSflorian (buf[1] << 16) + (buf[2] << 8) + buf[3]; 7037ac15270Sflorian n -= 4; 7047ac15270Sflorian buf += 4; 7057ac15270Sflorian } else 7067ac15270Sflorian return; 7077ac15270Sflorian } 7087ac15270Sflorian 7097ac15270Sflorian if (n > 0) { 7107ac15270Sflorian if (buf[0] >> 7 == 0) { 7117ac15270Sflorian val_len = buf[0]; 7127ac15270Sflorian n--; 7137ac15270Sflorian buf++; 7147ac15270Sflorian } else { 7157ac15270Sflorian if (n > 3) { 71610fd764fSflorian val_len = ((buf[0] & 0x7f) << 24) + 71710fd764fSflorian (buf[1] << 16) + (buf[2] << 8) + 71810fd764fSflorian buf[3]; 7197ac15270Sflorian n -= 4; 7207ac15270Sflorian buf += 4; 7217ac15270Sflorian } else 7227ac15270Sflorian return; 7237ac15270Sflorian } 724*f58bfe4fSflorian } else 725*f58bfe4fSflorian return; 726*f58bfe4fSflorian 7277ac15270Sflorian if (n < name_len + val_len) 7287ac15270Sflorian return; 7297ac15270Sflorian 7307ac15270Sflorian if ((env_entry = malloc(sizeof(struct env_val))) == NULL) { 7317ac15270Sflorian lwarnx("cannot allocate env_entry"); 7327ac15270Sflorian return; 7337ac15270Sflorian } 7347ac15270Sflorian 7357ac15270Sflorian if ((env_entry->val = calloc(sizeof(char), name_len + val_len + 7367ac15270Sflorian 2)) == NULL) { 7377ac15270Sflorian lwarnx("cannot allocate env_entry->val"); 7387ac15270Sflorian free(env_entry); 7397ac15270Sflorian return; 7407ac15270Sflorian } 7417ac15270Sflorian 7427ac15270Sflorian bcopy(buf, env_entry->val, name_len); 743965b2218Sblambert buf += name_len; 744965b2218Sblambert n -= name_len; 7457ac15270Sflorian 7467ac15270Sflorian env_entry->val[name_len] = '\0'; 7477ac15270Sflorian if (val_len < MAXPATHLEN && strcmp(env_entry->val, 748efec7dbcSflorian "SCRIPT_NAME") == 0 && c->script_name[0] == '\0') { 749efec7dbcSflorian bcopy(buf, c->script_name, val_len); 750efec7dbcSflorian c->script_name[val_len] = '\0'; 751efec7dbcSflorian } else if (val_len < MAXPATHLEN && strcmp(env_entry->val, 752efec7dbcSflorian "SCRIPT_FILENAME") == 0) { 7537ac15270Sflorian bcopy(buf, c->script_name, val_len); 75453847fa2Sflorian c->script_name[val_len] = '\0'; 7557ac15270Sflorian } 7567ac15270Sflorian env_entry->val[name_len] = '='; 7577ac15270Sflorian 7587ac15270Sflorian bcopy(buf, (env_entry->val) + name_len + 1, val_len); 759965b2218Sblambert buf += val_len; 760965b2218Sblambert n -= val_len; 7617ac15270Sflorian 7627ac15270Sflorian SLIST_INSERT_HEAD(&c->env, env_entry, entry); 7637ac15270Sflorian c->env_count++; 7647ac15270Sflorian } 7657ac15270Sflorian } 7667ac15270Sflorian 7677ac15270Sflorian void 768c3b13bc8Sblambert parse_stdin(uint8_t *buf, uint16_t n, struct request *c, uint16_t id) 7697ac15270Sflorian { 7707ac15270Sflorian struct fcgi_stdin *node; 7717ac15270Sflorian 7727ac15270Sflorian if (c->id != id) { 7737ac15270Sflorian lwarnx("unexpected id, ignoring"); 7747ac15270Sflorian return; 7757ac15270Sflorian } 7767ac15270Sflorian 7777ac15270Sflorian if ((node = calloc(1, sizeof(struct fcgi_stdin))) == NULL) { 7787ac15270Sflorian lwarnx("cannot calloc stdin node"); 7797ac15270Sflorian return; 7807ac15270Sflorian } 7817ac15270Sflorian 7827ac15270Sflorian bcopy(buf, node->data, n); 7837ac15270Sflorian node->data_pos = 0; 7847ac15270Sflorian node->data_len = n; 7857ac15270Sflorian 7867ac15270Sflorian TAILQ_INSERT_TAIL(&c->stdin_head, node, entry); 7877ac15270Sflorian 788a9461a24Sflorian if (event_initialized(&c->script_stdin_ev)) 7897ac15270Sflorian event_add(&c->script_stdin_ev, NULL); 7907ac15270Sflorian } 7917ac15270Sflorian 7927ac15270Sflorian size_t 793c3b13bc8Sblambert parse_record(uint8_t *buf, size_t n, struct request *c) 7947ac15270Sflorian { 7957ac15270Sflorian struct fcgi_record_header *h; 7967ac15270Sflorian 7977ac15270Sflorian if (n < sizeof(struct fcgi_record_header)) 7987ac15270Sflorian return (0); 7997ac15270Sflorian 8007ac15270Sflorian h = (struct fcgi_record_header*) buf; 8017ac15270Sflorian 8027ac15270Sflorian if (debug) 80303e61f17Sblambert dump_fcgi_record("", h); 8047ac15270Sflorian 8057ac15270Sflorian if (n < sizeof(struct fcgi_record_header) + ntohs(h->content_len) 8067ac15270Sflorian + h->padding_len) 8077ac15270Sflorian return (0); 8087ac15270Sflorian 8097ac15270Sflorian if (h->version != 1) 8107ac15270Sflorian lerrx(1, "wrong version"); 8117ac15270Sflorian 8127ac15270Sflorian switch (h->type) { 8137ac15270Sflorian case FCGI_BEGIN_REQUEST: 8147ac15270Sflorian parse_begin_request(buf + sizeof(struct fcgi_record_header), 8157ac15270Sflorian ntohs(h->content_len), c, ntohs(h->id)); 8167ac15270Sflorian break; 8177ac15270Sflorian case FCGI_PARAMS: 8187ac15270Sflorian parse_params(buf + sizeof(struct fcgi_record_header), 8197ac15270Sflorian ntohs(h->content_len), c, ntohs(h->id)); 8207ac15270Sflorian break; 8217ac15270Sflorian case FCGI_STDIN: 8227ac15270Sflorian parse_stdin(buf + sizeof(struct fcgi_record_header), 8237ac15270Sflorian ntohs(h->content_len), c, ntohs(h->id)); 8247ac15270Sflorian break; 8257ac15270Sflorian default: 8267ac15270Sflorian lwarnx("unimplemented type %d", h->type); 827f8701677Sderaadt break; 8287ac15270Sflorian } 8297ac15270Sflorian 8307ac15270Sflorian return (sizeof(struct fcgi_record_header) + ntohs(h->content_len) 8317ac15270Sflorian + h->padding_len); 8327ac15270Sflorian } 8337ac15270Sflorian 83402ad6491Sblambert /* 83502ad6491Sblambert * Fork a new CGI process to handle the request, translating 83602ad6491Sblambert * between FastCGI parameter records and CGI's environment variables, 83702ad6491Sblambert * as well as between the CGI process' stdin/stdout and the 83802ad6491Sblambert * corresponding FastCGI records. 83902ad6491Sblambert */ 8407ac15270Sflorian void 841c3b13bc8Sblambert exec_cgi(struct request *c) 8427ac15270Sflorian { 8437ac15270Sflorian struct env_val *env_entry; 844a9461a24Sflorian int s_in[2], s_out[2], s_err[2], i; 8457ac15270Sflorian pid_t pid; 8467ac15270Sflorian char *argv[2]; 8477ac15270Sflorian char **env; 8486bcf2ad3Sflorian char *path; 8497ac15270Sflorian 8507ac15270Sflorian i = 0; 8517ac15270Sflorian 852a9461a24Sflorian if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s_in) == -1) 853a9461a24Sflorian lerr(1, "socketpair"); 854a9461a24Sflorian if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s_out) == -1) 8557ac15270Sflorian lerr(1, "socketpair"); 8567ac15270Sflorian if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s_err) == -1) 8577ac15270Sflorian lerr(1, "socketpair"); 8583f9f8982Sbenno cgi_inflight--; 8593f9f8982Sbenno c->inflight_fds_accounted = 1; 8607ac15270Sflorian ldebug("fork: %s", c->script_name); 861965b2218Sblambert 8627ac15270Sflorian switch (pid = fork()) { 8637ac15270Sflorian case -1: 864e014c219Sflorian c->script_status = errno; 865e014c219Sflorian 8667ac15270Sflorian lwarn("fork"); 867e014c219Sflorian 868e014c219Sflorian close(s_in[0]); 869e014c219Sflorian close(s_out[0]); 870e014c219Sflorian close(s_err[0]); 871e014c219Sflorian 872e014c219Sflorian close(s_in[1]); 873e014c219Sflorian close(s_out[1]); 874e014c219Sflorian close(s_err[1]); 875e014c219Sflorian 876e014c219Sflorian c->stdin_fd_closed = c->stdout_fd_closed = 877e014c219Sflorian c->stderr_fd_closed = 1; 878e014c219Sflorian c->script_flags = (STDOUT_DONE | STDERR_DONE | SCRIPT_DONE); 879e014c219Sflorian 880e014c219Sflorian create_end_record(c); 8817ac15270Sflorian return; 8827ac15270Sflorian case 0: 8837ac15270Sflorian /* Child process */ 884a9461a24Sflorian close(s_in[0]); 885a9461a24Sflorian close(s_out[0]); 8867ac15270Sflorian close(s_err[0]); 887f4a8b980Sflorian 888a9461a24Sflorian if (dup2(s_in[1], STDIN_FILENO) == -1) 8897ac15270Sflorian _exit(1); 890a9461a24Sflorian if (dup2(s_out[1], STDOUT_FILENO) == -1) 8917ac15270Sflorian _exit(1); 8927ac15270Sflorian if (dup2(s_err[1], STDERR_FILENO) == -1) 8937ac15270Sflorian _exit(1); 894f4a8b980Sflorian 895f4a8b980Sflorian close(s_in[1]); 896f4a8b980Sflorian close(s_out[1]); 897f4a8b980Sflorian close(s_err[1]); 898f4a8b980Sflorian 8996bcf2ad3Sflorian path = strrchr(c->script_name, '/'); 9006bcf2ad3Sflorian if (path != NULL) { 90176f0500eSflorian if (path != c->script_name) { 9026bcf2ad3Sflorian *path = '\0'; 9036bcf2ad3Sflorian if (chdir(c->script_name) == -1) 90476f0500eSflorian lwarn("cannot chdir to %s", 90576f0500eSflorian c->script_name); 9066bcf2ad3Sflorian *path = '/'; 90776f0500eSflorian } else 90876f0500eSflorian if (chdir("/") == -1) 90976f0500eSflorian lwarn("cannot chdir to /"); 9106bcf2ad3Sflorian } 9116bcf2ad3Sflorian 9127ac15270Sflorian argv[0] = c->script_name; 9137ac15270Sflorian argv[1] = NULL; 9147ac15270Sflorian if ((env = calloc(c->env_count + 1, sizeof(char*))) == NULL) 9157ac15270Sflorian _exit(1); 9167ac15270Sflorian SLIST_FOREACH(env_entry, &c->env, entry) 9177ac15270Sflorian env[i++] = env_entry->val; 9187ac15270Sflorian env[i++] = NULL; 9197ac15270Sflorian execve(c->script_name, argv, env); 9201878c91fSdjm lwarn("execve %s", c->script_name); 9217ac15270Sflorian _exit(1); 9227ac15270Sflorian 9237ac15270Sflorian } 924f8701677Sderaadt 9257ac15270Sflorian /* Parent process*/ 926a9461a24Sflorian close(s_in[1]); 927a9461a24Sflorian close(s_out[1]); 9287ac15270Sflorian close(s_err[1]); 92994ee156dSflorian 930a9461a24Sflorian fcntl(s_in[0], F_SETFD, FD_CLOEXEC); 931a9461a24Sflorian fcntl(s_out[0], F_SETFD, FD_CLOEXEC); 93294ee156dSflorian fcntl(s_err[0], F_SETFD, FD_CLOEXEC); 93394ee156dSflorian 934a9461a24Sflorian if (ioctl(s_in[0], FIONBIO, &on) == -1) 935a9461a24Sflorian lerr(1, "script ioctl(FIONBIO)"); 936a9461a24Sflorian if (ioctl(s_out[0], FIONBIO, &on) == -1) 9377ac15270Sflorian lerr(1, "script ioctl(FIONBIO)"); 9387ac15270Sflorian if (ioctl(s_err[0], FIONBIO, &on) == -1) 9397ac15270Sflorian lerr(1, "script ioctl(FIONBIO)"); 9407ac15270Sflorian 9417ac15270Sflorian c->script_pid = pid; 942a9461a24Sflorian event_set(&c->script_stdin_ev, s_in[0], EV_WRITE | EV_PERSIST, 943a9461a24Sflorian script_out, c); 944a9461a24Sflorian event_add(&c->script_stdin_ev, NULL); 945a9461a24Sflorian event_set(&c->script_ev, s_out[0], EV_READ | EV_PERSIST, 946a9461a24Sflorian script_std_in, c); 9477ac15270Sflorian event_add(&c->script_ev, NULL); 9487ac15270Sflorian event_set(&c->script_err_ev, s_err[0], EV_READ | EV_PERSIST, 9497ac15270Sflorian script_err_in, c); 9507ac15270Sflorian event_add(&c->script_err_ev, NULL); 9517ac15270Sflorian } 9527ac15270Sflorian 9537ac15270Sflorian void 954c3b13bc8Sblambert create_end_record(struct request *c) 9557ac15270Sflorian { 9567ac15270Sflorian struct fcgi_response *resp; 9577ac15270Sflorian struct fcgi_record_header *header; 95803e61f17Sblambert struct fcgi_end_request_body *end_request; 9597ac15270Sflorian 9607ac15270Sflorian if ((resp = malloc(sizeof(struct fcgi_response))) == NULL) { 9617ac15270Sflorian lwarnx("cannot malloc fcgi_response"); 9627ac15270Sflorian return; 9637ac15270Sflorian } 9647ac15270Sflorian header = (struct fcgi_record_header*) resp->data; 9657ac15270Sflorian header->version = 1; 9667ac15270Sflorian header->type = FCGI_END_REQUEST; 9677ac15270Sflorian header->id = htons(c->id); 9687ac15270Sflorian header->content_len = htons(sizeof(struct 96903e61f17Sblambert fcgi_end_request_body)); 9707ac15270Sflorian header->padding_len = 0; 9717ac15270Sflorian header->reserved = 0; 9728c347892Sflorian end_request = (struct fcgi_end_request_body *) (resp->data + 9738c347892Sflorian sizeof(struct fcgi_record_header)); 9747ac15270Sflorian end_request->app_status = htonl(c->script_status); 9757ac15270Sflorian end_request->protocol_status = FCGI_REQUEST_COMPLETE; 9768c347892Sflorian end_request->reserved[0] = 0; 9778c347892Sflorian end_request->reserved[1] = 0; 9788c347892Sflorian end_request->reserved[2] = 0; 9797ac15270Sflorian resp->data_pos = 0; 98003e61f17Sblambert resp->data_len = sizeof(struct fcgi_end_request_body) + 9817ac15270Sflorian sizeof(struct fcgi_record_header); 9824404b4d5Sflorian slowcgi_add_response(c, resp); 9837ac15270Sflorian } 9847ac15270Sflorian 9857ac15270Sflorian void 986c3b13bc8Sblambert script_in(int fd, struct event *ev, struct request *c, uint8_t type) 9877ac15270Sflorian { 9887ac15270Sflorian struct fcgi_response *resp; 9897ac15270Sflorian struct fcgi_record_header *header; 9907ac15270Sflorian ssize_t n; 9917ac15270Sflorian 9927ac15270Sflorian if ((resp = malloc(sizeof(struct fcgi_response))) == NULL) { 9937ac15270Sflorian lwarnx("cannot malloc fcgi_response"); 9947ac15270Sflorian return; 9957ac15270Sflorian } 9967ac15270Sflorian header = (struct fcgi_record_header*) resp->data; 9977ac15270Sflorian header->version = 1; 9987ac15270Sflorian header->type = type; 9997ac15270Sflorian header->id = htons(c->id); 10007ac15270Sflorian header->padding_len = 0; 10017ac15270Sflorian header->reserved = 0; 10027ac15270Sflorian 10037ac15270Sflorian n = read(fd, resp->data + sizeof(struct fcgi_record_header), 10040ee0284dSblambert FCGI_CONTENT_SIZE); 10057ac15270Sflorian 10067ac15270Sflorian if (n == -1) { 10077ac15270Sflorian switch (errno) { 10087ac15270Sflorian case EINTR: 10097ac15270Sflorian case EAGAIN: 1010aa48dbd7Sjasper free(resp); 10117ac15270Sflorian return; 10127ac15270Sflorian default: 10137ac15270Sflorian n = 0; /* fake empty FCGI_STD{OUT,ERR} response */ 10147ac15270Sflorian } 10157ac15270Sflorian } 10167ac15270Sflorian header->content_len = htons(n); 10177ac15270Sflorian resp->data_pos = 0; 10187ac15270Sflorian resp->data_len = n + sizeof(struct fcgi_record_header); 10194404b4d5Sflorian slowcgi_add_response(c, resp); 10207ac15270Sflorian 10217ac15270Sflorian if (n == 0) { 10227ac15270Sflorian if (type == FCGI_STDOUT) 10237ac15270Sflorian c->script_flags |= STDOUT_DONE; 10247ac15270Sflorian else 10257ac15270Sflorian c->script_flags |= STDERR_DONE; 10267ac15270Sflorian 10277ac15270Sflorian if (c->script_flags == (STDOUT_DONE | STDERR_DONE | 10287ac15270Sflorian SCRIPT_DONE)) { 1029c3b13bc8Sblambert create_end_record(c); 10307ac15270Sflorian } 10317ac15270Sflorian event_del(ev); 10327ac15270Sflorian close(fd); 10336bdc2311Sflorian if (type == FCGI_STDOUT) 10346bdc2311Sflorian c->stdout_fd_closed = 1; 10356bdc2311Sflorian else 10366bdc2311Sflorian c->stderr_fd_closed = 1; 10377ac15270Sflorian } 10387ac15270Sflorian } 10397ac15270Sflorian 10407ac15270Sflorian void 10417ac15270Sflorian script_std_in(int fd, short events, void *arg) 10427ac15270Sflorian { 1043c3b13bc8Sblambert struct request *c = arg; 10447ac15270Sflorian script_in(fd, &c->script_ev, c, FCGI_STDOUT); 10457ac15270Sflorian } 10467ac15270Sflorian 10477ac15270Sflorian void 10487ac15270Sflorian script_err_in(int fd, short events, void *arg) 10497ac15270Sflorian { 1050c3b13bc8Sblambert struct request *c = arg; 10517ac15270Sflorian script_in(fd, &c->script_err_ev, c, FCGI_STDERR); 10527ac15270Sflorian } 10537ac15270Sflorian 10547ac15270Sflorian void 10557ac15270Sflorian script_out(int fd, short events, void *arg) 10567ac15270Sflorian { 1057c3b13bc8Sblambert struct request *c; 10587ac15270Sflorian struct fcgi_stdin *node; 10597ac15270Sflorian ssize_t n; 10607ac15270Sflorian 10617ac15270Sflorian c = arg; 10627ac15270Sflorian 10637ac15270Sflorian while ((node = TAILQ_FIRST(&c->stdin_head))) { 10647ac15270Sflorian if (node->data_len == 0) { /* end of stdin marker */ 1065a9461a24Sflorian close(fd); 10666bdc2311Sflorian c->stdin_fd_closed = 1; 10677ac15270Sflorian break; 10687ac15270Sflorian } 10697ac15270Sflorian n = write(fd, node->data + node->data_pos, node->data_len); 10707ac15270Sflorian if (n == -1) { 107114379226Sflorian if (errno == EAGAIN || errno == EINTR) 10727ac15270Sflorian return; 10737ac15270Sflorian event_del(&c->script_stdin_ev); 10747ac15270Sflorian return; 10757ac15270Sflorian } 10767ac15270Sflorian node->data_pos += n; 10777ac15270Sflorian node->data_len -= n; 10787ac15270Sflorian if (node->data_len == 0) { 10797ac15270Sflorian TAILQ_REMOVE(&c->stdin_head, node, entry); 10807ac15270Sflorian free(node); 10817ac15270Sflorian } 10827ac15270Sflorian } 1083a9461a24Sflorian event_del(&c->script_stdin_ev); 10847ac15270Sflorian } 10857ac15270Sflorian 10867ac15270Sflorian void 1087c3b13bc8Sblambert cleanup_request(struct request *c) 10887ac15270Sflorian { 10897ac15270Sflorian struct fcgi_response *resp; 10907ac15270Sflorian struct fcgi_stdin *stdin_node; 10917ac15270Sflorian struct env_val *env_entry; 1092c3b13bc8Sblambert struct requests *ncs, *tcs; 10937ac15270Sflorian 10947ac15270Sflorian evtimer_del(&c->tmo); 10957ac15270Sflorian if (event_initialized(&c->ev)) 10967ac15270Sflorian event_del(&c->ev); 10977ac15270Sflorian if (event_initialized(&c->resp_ev)) 10987ac15270Sflorian event_del(&c->resp_ev); 10997ac15270Sflorian if (event_initialized(&c->script_ev)) { 11006bdc2311Sflorian if (!c->stdout_fd_closed) 11017ac15270Sflorian close(EVENT_FD(&c->script_ev)); 11027ac15270Sflorian event_del(&c->script_ev); 11037ac15270Sflorian } 11047ac15270Sflorian if (event_initialized(&c->script_err_ev)) { 11056bdc2311Sflorian if (!c->stderr_fd_closed) 11067ac15270Sflorian close(EVENT_FD(&c->script_err_ev)); 11077ac15270Sflorian event_del(&c->script_err_ev); 11087ac15270Sflorian } 11097ac15270Sflorian if (event_initialized(&c->script_stdin_ev)) { 11106bdc2311Sflorian if (!c->stdin_fd_closed) 11117ac15270Sflorian close(EVENT_FD(&c->script_stdin_ev)); 11127ac15270Sflorian event_del(&c->script_stdin_ev); 11137ac15270Sflorian } 11147ac15270Sflorian close(c->fd); 11157ac15270Sflorian while (!SLIST_EMPTY(&c->env)) { 11167ac15270Sflorian env_entry = SLIST_FIRST(&c->env); 11177ac15270Sflorian SLIST_REMOVE_HEAD(&c->env, entry); 11187ac15270Sflorian free(env_entry->val); 11197ac15270Sflorian free(env_entry); 11207ac15270Sflorian } 11217ac15270Sflorian 11227ac15270Sflorian while ((resp = TAILQ_FIRST(&c->response_head))) { 11237ac15270Sflorian TAILQ_REMOVE(&c->response_head, resp, entry); 11247ac15270Sflorian free(resp); 11257ac15270Sflorian } 11267ac15270Sflorian while ((stdin_node = TAILQ_FIRST(&c->stdin_head))) { 11277ac15270Sflorian TAILQ_REMOVE(&c->stdin_head, stdin_node, entry); 11287ac15270Sflorian free(stdin_node); 11297ac15270Sflorian } 1130c3b13bc8Sblambert SLIST_FOREACH_SAFE(ncs, &slowcgi_proc.requests, entry, tcs) { 1131c3b13bc8Sblambert if (ncs->request == c) { 1132c3b13bc8Sblambert SLIST_REMOVE(&slowcgi_proc.requests, ncs, requests, 11337ac15270Sflorian entry); 11347ac15270Sflorian free(ncs); 11357ac15270Sflorian break; 11367ac15270Sflorian } 11377ac15270Sflorian } 11383f9f8982Sbenno if (! c->inflight_fds_accounted) 11393f9f8982Sbenno cgi_inflight--; 11407ac15270Sflorian free(c); 11417ac15270Sflorian } 11427ac15270Sflorian 1143965b2218Sblambert void 114403e61f17Sblambert dump_fcgi_record(const char *p, struct fcgi_record_header *h) 114503e61f17Sblambert { 114603e61f17Sblambert dump_fcgi_record_header(p, h); 114703e61f17Sblambert 114803e61f17Sblambert if (h->type == FCGI_BEGIN_REQUEST) 114903e61f17Sblambert dump_fcgi_begin_request_body(p, 1150d241f573Sflorian (struct fcgi_begin_request_body *)(h + 1)); 115103e61f17Sblambert else if (h->type == FCGI_END_REQUEST) 115203e61f17Sblambert dump_fcgi_end_request_body(p, 1153d241f573Sflorian (struct fcgi_end_request_body *)(h + 1)); 115403e61f17Sblambert } 115503e61f17Sblambert 115603e61f17Sblambert void 1157965b2218Sblambert dump_fcgi_record_header(const char* p, struct fcgi_record_header *h) 11587ac15270Sflorian { 11597ac15270Sflorian ldebug("%sversion: %d", p, h->version); 11607ac15270Sflorian ldebug("%stype: %d", p, h->type); 11617ac15270Sflorian ldebug("%srequestId: %d", p, ntohs(h->id)); 11627ac15270Sflorian ldebug("%scontentLength: %d", p, ntohs(h->content_len)); 11637ac15270Sflorian ldebug("%spaddingLength: %d", p, h->padding_len); 11647ac15270Sflorian ldebug("%sreserved: %d", p, h->reserved); 11657ac15270Sflorian } 11667ac15270Sflorian 11677ac15270Sflorian void 116803e61f17Sblambert dump_fcgi_begin_request_body(const char *p, struct fcgi_begin_request_body *b) 116903e61f17Sblambert { 117003e61f17Sblambert ldebug("%srole %d", p, ntohs(b->role)); 117103e61f17Sblambert ldebug("%sflags %d", p, b->flags); 117203e61f17Sblambert } 117303e61f17Sblambert 117403e61f17Sblambert void 117503e61f17Sblambert dump_fcgi_end_request_body(const char *p, struct fcgi_end_request_body *b) 117603e61f17Sblambert { 117703e61f17Sblambert ldebug("%sappStatus: %d", p, ntohl(b->app_status)); 117803e61f17Sblambert ldebug("%sprotocolStatus: %d", p, b->protocol_status); 117903e61f17Sblambert } 118003e61f17Sblambert 118103e61f17Sblambert void 11827ac15270Sflorian syslog_vstrerror(int e, int priority, const char *fmt, va_list ap) 11837ac15270Sflorian { 11847ac15270Sflorian char *s; 11857ac15270Sflorian 11867ac15270Sflorian if (vasprintf(&s, fmt, ap) == -1) { 11877ac15270Sflorian syslog(LOG_EMERG, "unable to alloc in syslog_vstrerror"); 11887ac15270Sflorian exit(1); 11897ac15270Sflorian } 11907ac15270Sflorian syslog(priority, "%s: %s", s, strerror(e)); 11917ac15270Sflorian free(s); 11927ac15270Sflorian } 11937ac15270Sflorian 1194d0a52cffSflorian __dead void 11957ac15270Sflorian syslog_err(int ecode, const char *fmt, ...) 11967ac15270Sflorian { 11977ac15270Sflorian va_list ap; 11987ac15270Sflorian 11997ac15270Sflorian va_start(ap, fmt); 12007ac15270Sflorian syslog_vstrerror(errno, LOG_EMERG, fmt, ap); 12017ac15270Sflorian va_end(ap); 12027ac15270Sflorian exit(ecode); 12037ac15270Sflorian } 12047ac15270Sflorian 1205d0a52cffSflorian __dead void 12067ac15270Sflorian syslog_errx(int ecode, const char *fmt, ...) 12077ac15270Sflorian { 12087ac15270Sflorian va_list ap; 12097ac15270Sflorian 12107ac15270Sflorian va_start(ap, fmt); 12117ac15270Sflorian vsyslog(LOG_WARNING, fmt, ap); 12127ac15270Sflorian va_end(ap); 12137ac15270Sflorian exit(ecode); 12147ac15270Sflorian } 12157ac15270Sflorian 12167ac15270Sflorian void 12177ac15270Sflorian syslog_warn(const char *fmt, ...) 12187ac15270Sflorian { 12197ac15270Sflorian va_list ap; 12207ac15270Sflorian 12217ac15270Sflorian va_start(ap, fmt); 12227ac15270Sflorian syslog_vstrerror(errno, LOG_WARNING, fmt, ap); 12237ac15270Sflorian va_end(ap); 12247ac15270Sflorian } 12257ac15270Sflorian 12267ac15270Sflorian void 12277ac15270Sflorian syslog_warnx(const char *fmt, ...) 12287ac15270Sflorian { 12297ac15270Sflorian va_list ap; 12307ac15270Sflorian 12317ac15270Sflorian va_start(ap, fmt); 12327ac15270Sflorian vsyslog(LOG_WARNING, fmt, ap); 12337ac15270Sflorian va_end(ap); 12347ac15270Sflorian } 12357ac15270Sflorian 12367ac15270Sflorian void 12377ac15270Sflorian syslog_info(const char *fmt, ...) 12387ac15270Sflorian { 12397ac15270Sflorian va_list ap; 12407ac15270Sflorian 12417ac15270Sflorian va_start(ap, fmt); 12427ac15270Sflorian vsyslog(LOG_INFO, fmt, ap); 12437ac15270Sflorian va_end(ap); 12447ac15270Sflorian } 12457ac15270Sflorian 12467ac15270Sflorian void 12477ac15270Sflorian syslog_debug(const char *fmt, ...) 12487ac15270Sflorian { 12497ac15270Sflorian va_list ap; 12507ac15270Sflorian 12517ac15270Sflorian if (!debug) 12527ac15270Sflorian return; 12537ac15270Sflorian 12547ac15270Sflorian va_start(ap, fmt); 12557ac15270Sflorian vsyslog(LOG_DEBUG, fmt, ap); 12567ac15270Sflorian va_end(ap); 12577ac15270Sflorian } 1258