2 * Copyright (c) 2016-2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
3 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
4 * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
5 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
6 * Copyright (c) 2001 Markus Friedl. All rights reserved.
7 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
8 * Copyright (c) 2001 Theo de Raadt. All rights reserved.
10 * Permission to use, copy, modify, and distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 #include "got_compat.h"
26 #include <sys/ioctl.h>
27 #include <sys/types.h>
28 #include <sys/queue.h>
29 #include <sys/socket.h>
33 #include <netinet/in.h>
35 #include <arpa/inet.h>
51 #include "got_reference.h"
55 TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
57 TAILQ_ENTRY(file) entry;
63 struct file *newfile(const char *, int);
64 static void closefile(struct file *);
65 int check_file_secrecy(int, const char *);
68 int yyerror(const char *, ...)
69 __attribute__((__format__ (printf, 1, 2)))
70 __attribute__((__nonnull__ (1)));
71 int kw_cmp(const void *, const void *);
77 TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
79 TAILQ_ENTRY(sym) entry;
86 int symset(const char *, const char *, int);
87 char *symget(const char *);
91 static struct gotwebd *gotwebd;
92 static struct server *new_srv;
93 static struct server *conf_new_server(const char *);
94 int getservice(const char *);
97 int get_addrs(const char *, const char *, struct server *);
98 int addr_dup_check(struct addresslist *, struct address *,
99 const char *, const char *);
100 int add_addr(struct server *, struct address *);
112 %token LISTEN WWW_PATH MAX_REPOS SITE_NAME SITE_OWNER SITE_LINK LOGO
113 %token LOGO_URL SHOW_REPO_OWNER SHOW_REPO_AGE SHOW_REPO_DESCRIPTION
114 %token MAX_REPOS_DISPLAY REPOS_PATH MAX_COMMITS_DISPLAY ON ERROR
115 %token SHOW_SITE_OWNER SHOW_REPO_CLONEURL PORT PREFORK RESPECT_EXPORTOK
116 %token UNIX_SOCKET UNIX_SOCKET_NAME SERVER CHROOT CUSTOM_CSS SOCKET
118 %token <v.string> STRING
119 %token <v.number> NUMBER
120 %type <v.number> boolean
121 %type <v.string> listen_addr
125 grammar : /* empty */
127 | grammar varset '\n'
129 | grammar server '\n'
130 | grammar error '\n' { file->errors++; }
133 varset : STRING '=' STRING {
136 if (isspace((unsigned char)*s)) {
137 yyerror("macro name cannot contain "
144 if (symset($1, $3, 0) == -1)
145 fatal("cannot store variable");
152 if (strcasecmp($1, "1") == 0 ||
153 strcasecmp($1, "on") == 0)
155 else if (strcasecmp($1, "0") == 0 ||
156 strcasecmp($1, "off") == 0)
159 yyerror("invalid boolean value '%s'", $1);
167 if ($1 != 0 && $1 != 1) {
168 yyerror("invalid boolean value '%lld'", $1);
175 listen_addr : '*' { $$ = NULL; }
179 main : PREFORK NUMBER {
180 if ($2 <= 0 || $2 > PROC_MAX_INSTANCES) {
181 yyerror("prefork is %s: %lld",
182 $2 <= 0 ? "too small" : "too large", $2);
185 gotwebd->prefork_gotwebd = $2;
189 yyerror("chroot path can't be an empty"
195 n = strlcpy(gotwebd->httpd_chroot, $2,
196 sizeof(gotwebd->httpd_chroot));
197 if (n >= sizeof(gotwebd->httpd_chroot)) {
198 yyerror("%s: httpd_chroot truncated", __func__);
204 | UNIX_SOCKET boolean {
205 gotwebd->unix_socket = $2;
207 | UNIX_SOCKET_NAME STRING {
208 n = snprintf(gotwebd->unix_socket_name,
209 sizeof(gotwebd->unix_socket_name), "%s%s",
210 gotwebd->httpd_chroot, $2);
212 (size_t)n >= sizeof(gotwebd->unix_socket_name)) {
213 yyerror("%s: unix_socket_name truncated",
222 server : SERVER STRING {
225 TAILQ_FOREACH(srv, &gotwebd->servers, entry) {
226 if (strcmp(srv->name, $2) == 0) {
227 yyerror("server name exists '%s'", $2);
233 new_srv = conf_new_server($2);
234 log_debug("adding server %s", $2);
240 TAILQ_FOREACH(srv, &gotwebd->servers, entry) {
241 if (strcmp(srv->name, $2) == 0) {
242 yyerror("server name exists '%s'", $2);
248 new_srv = conf_new_server($2);
249 log_debug("adding server %s", $2);
251 } '{' optnl serveropts2 '}' {
255 serveropts1 : REPOS_PATH STRING {
256 n = strlcpy(new_srv->repos_path, $2,
257 sizeof(new_srv->repos_path));
258 if (n >= sizeof(new_srv->repos_path)) {
259 yyerror("%s: repos_path truncated", __func__);
266 n = strlcpy(new_srv->site_name, $2,
267 sizeof(new_srv->site_name));
268 if (n >= sizeof(new_srv->site_name)) {
269 yyerror("%s: site_name truncated", __func__);
275 | SITE_OWNER STRING {
276 n = strlcpy(new_srv->site_owner, $2,
277 sizeof(new_srv->site_owner));
278 if (n >= sizeof(new_srv->site_owner)) {
279 yyerror("%s: site_owner truncated", __func__);
286 n = strlcpy(new_srv->site_link, $2,
287 sizeof(new_srv->site_link));
288 if (n >= sizeof(new_srv->site_link)) {
289 yyerror("%s: site_link truncated", __func__);
296 n = strlcpy(new_srv->logo, $2, sizeof(new_srv->logo));
297 if (n >= sizeof(new_srv->logo)) {
298 yyerror("%s: logo truncated", __func__);
305 n = strlcpy(new_srv->logo_url, $2,
306 sizeof(new_srv->logo_url));
307 if (n >= sizeof(new_srv->logo_url)) {
308 yyerror("%s: logo_url truncated", __func__);
314 | CUSTOM_CSS STRING {
315 n = strlcpy(new_srv->custom_css, $2,
316 sizeof(new_srv->custom_css));
317 if (n >= sizeof(new_srv->custom_css)) {
318 yyerror("%s: custom_css truncated", __func__);
324 | LISTEN ON listen_addr PORT STRING {
325 if (get_addrs($3, $5, new_srv) == -1) {
326 yyerror("could not get addrs");
331 new_srv->fcgi_socket = 1;
333 | LISTEN ON listen_addr PORT NUMBER {
337 n = snprintf(portno, sizeof(portno), "%lld",
339 if (n < 0 || (size_t)n >= sizeof(portno))
340 fatalx("port number too long: %lld",
343 if (get_addrs($3, portno, new_srv) == -1) {
344 yyerror("could not get addrs");
348 new_srv->fcgi_socket = 1;
350 | LISTEN ON SOCKET STRING {
351 if (strcasecmp($4, "off") == 0) {
352 new_srv->unix_socket = 0;
357 new_srv->unix_socket = 1;
359 n = snprintf(new_srv->unix_socket_name,
360 sizeof(new_srv->unix_socket_name), "%s%s",
361 gotwebd->httpd_chroot, $4);
363 (size_t)n >= sizeof(new_srv->unix_socket_name)) {
364 yyerror("%s: unix_socket_name truncated",
373 yyerror("max_repos is too small: %lld", $2);
376 new_srv->max_repos = $2;
378 | SHOW_SITE_OWNER boolean {
379 new_srv->show_site_owner = $2;
381 | SHOW_REPO_OWNER boolean {
382 new_srv->show_repo_owner = $2;
384 | SHOW_REPO_AGE boolean {
385 new_srv->show_repo_age = $2;
387 | SHOW_REPO_DESCRIPTION boolean {
388 new_srv->show_repo_description = $2;
390 | SHOW_REPO_CLONEURL boolean {
391 new_srv->show_repo_cloneurl = $2;
393 | RESPECT_EXPORTOK boolean {
394 new_srv->respect_exportok = $2;
396 | MAX_REPOS_DISPLAY NUMBER {
398 yyerror("max_repos_display is too small: %lld",
402 new_srv->max_repos_display = $2;
404 | MAX_COMMITS_DISPLAY NUMBER {
406 yyerror("max_commits_display is too small:"
410 new_srv->max_commits_display = $2;
414 serveropts2 : serveropts2 serveropts1 nl
421 optnl : '\n' optnl /* zero or more newlines */
433 yyerror(const char *fmt, ...)
440 if (vasprintf(&msg, fmt, ap) == -1)
441 fatalx("yyerror vasprintf");
443 logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
449 kw_cmp(const void *k, const void *e)
451 return (strcmp(k, ((const struct keywords *)e)->k_name));
457 /* This has to be sorted always. */
458 static const struct keywords keywords[] = {
459 { "chroot", CHROOT },
460 { "custom_css", CUSTOM_CSS },
461 { "listen", LISTEN },
463 { "logo_url", LOGO_URL },
464 { "max_commits_display", MAX_COMMITS_DISPLAY },
465 { "max_repos", MAX_REPOS },
466 { "max_repos_display", MAX_REPOS_DISPLAY },
469 { "prefork", PREFORK },
470 { "repos_path", REPOS_PATH },
471 { "respect_exportok", RESPECT_EXPORTOK },
472 { "server", SERVER },
473 { "show_repo_age", SHOW_REPO_AGE },
474 { "show_repo_cloneurl", SHOW_REPO_CLONEURL },
475 { "show_repo_description", SHOW_REPO_DESCRIPTION },
476 { "show_repo_owner", SHOW_REPO_OWNER },
477 { "show_site_owner", SHOW_SITE_OWNER },
478 { "site_link", SITE_LINK },
479 { "site_name", SITE_NAME },
480 { "site_owner", SITE_OWNER },
481 { "socket", SOCKET },
482 { "unix_socket", UNIX_SOCKET },
483 { "unix_socket_name", UNIX_SOCKET_NAME },
485 const struct keywords *p;
487 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
488 sizeof(keywords[0]), kw_cmp);
496 #define MAXPUSHBACK 128
498 unsigned char *parsebuf;
500 unsigned char pushback_buffer[MAXPUSHBACK];
501 int pushback_index = 0;
509 /* Read character from the parsebuffer instead of input. */
510 if (parseindex >= 0) {
511 c = parsebuf[parseindex++];
520 return (pushback_buffer[--pushback_index]);
523 c = getc(file->stream);
525 yyerror("reached end of file while parsing "
530 c = getc(file->stream);
532 next = getc(file->stream);
537 yylval.lineno = file->lineno;
539 c = getc(file->stream);
555 if (pushback_index < MAXPUSHBACK-1)
556 return (pushback_buffer[pushback_index++] = c);
568 /* Skip to either EOF or the first real EOL. */
571 c = pushback_buffer[--pushback_index];
587 unsigned char buf[8096];
588 unsigned char *p, *val;
595 while (c == ' ' || c == '\t')
596 c = lgetc(0); /* nothing */
598 yylval.lineno = file->lineno;
601 while (c != '\n' && c != EOF)
602 c = lgetc(0); /* nothing */
604 if (c == '$' && parsebuf == NULL) {
610 if (p + 1 >= buf + sizeof(buf) - 1) {
611 yyerror("string too long");
614 if (isalnum(c) || c == '_') {
624 yyerror("macro '%s' not defined", buf);
643 } else if (c == '\\') {
644 next = lgetc(quotec);
647 if (next == quotec || c == ' ' || c == '\t')
649 else if (next == '\n') {
654 } else if (c == quotec) {
657 } else if (c == '\0') {
658 yyerror("syntax error");
661 if (p + 1 >= buf + sizeof(buf) - 1) {
662 yyerror("string too long");
667 yylval.v.string = strdup(buf);
668 if (yylval.v.string == NULL)
669 err(1, "yylex: strdup");
673 #define allowed_to_end_number(x) \
674 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
676 if (c == '-' || isdigit(c)) {
679 if ((unsigned)(p-buf) >= sizeof(buf)) {
680 yyerror("string too long");
684 } while (c != EOF && isdigit(c));
686 if (p == buf + 1 && buf[0] == '-')
688 if (c == EOF || allowed_to_end_number(c)) {
689 const char *errstr = NULL;
692 yylval.v.number = strtonum(buf, LLONG_MIN,
695 yyerror("\"%s\" invalid number: %s",
710 #define allowed_in_string(x) \
711 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
712 x != '{' && x != '}' && \
713 x != '!' && x != '=' && x != '#' && \
716 if (isalnum(c) || c == ':' || c == '_') {
719 if ((unsigned)(p-buf) >= sizeof(buf)) {
720 yyerror("string too long");
724 } while (c != EOF && (allowed_in_string(c)));
728 if (token == STRING) {
729 yylval.v.string = strdup(buf);
730 if (yylval.v.string == NULL)
731 err(1, "yylex: strdup");
736 yylval.lineno = file->lineno;
745 check_file_secrecy(int fd, const char *fname)
749 if (fstat(fd, &st)) {
750 log_warn("cannot stat %s", fname);
753 if (st.st_uid != 0 && st.st_uid != getuid()) {
754 log_warnx("%s: owner not root or current user", fname);
757 if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
758 log_warnx("%s: group writable or world read/writable", fname);
765 newfile(const char *name, int secret)
769 nfile = calloc(1, sizeof(struct file));
774 nfile->name = strdup(name);
775 if (nfile->name == NULL) {
780 nfile->stream = fopen(nfile->name, "r");
781 if (nfile->stream == NULL) {
782 /* no warning, we don't require a conf file */
787 check_file_secrecy(fileno(nfile->stream), nfile->name)) {
788 fclose(nfile->stream);
798 closefile(struct file *xfile)
800 fclose(xfile->stream);
806 add_default_server(void)
808 new_srv = conf_new_server(D_SITENAME);
809 log_debug("%s: adding default server %s", __func__, D_SITENAME);
813 parse_config(const char *filename, struct gotwebd *env)
815 struct sym *sym, *next;
817 if (config_init(env) == -1)
818 fatalx("failed to initialize configuration");
822 file = newfile(filename, 0);
824 add_default_server();
825 sockets_parse_sockets(env);
826 /* just return, as we don't require a conf file */
831 errors = file->errors;
834 /* Free macros and check which have not been used. */
835 TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
836 if ((gotwebd->gotwebd_verbose > 1) && !sym->used)
837 fprintf(stderr, "warning: macro '%s' not used\n",
842 TAILQ_REMOVE(&symhead, sym, entry);
850 /* just add default server if no config specified */
851 if (gotwebd->server_cnt == 0)
852 add_default_server();
854 /* setup our listening sockets */
855 sockets_parse_sockets(env);
861 conf_new_server(const char *name)
863 struct server *srv = NULL;
865 srv = calloc(1, sizeof(*srv));
867 fatalx("%s: calloc", __func__);
869 n = strlcpy(srv->name, name, sizeof(srv->name));
870 if (n >= sizeof(srv->name))
871 fatalx("%s: strlcpy", __func__);
872 n = snprintf(srv->unix_socket_name,
873 sizeof(srv->unix_socket_name), "%s%s", D_HTTPD_CHROOT,
875 if (n < 0 || (size_t)n >= sizeof(srv->unix_socket_name))
876 fatalx("%s: snprintf", __func__);
877 n = strlcpy(srv->repos_path, D_GOTPATH,
878 sizeof(srv->repos_path));
879 if (n >= sizeof(srv->repos_path))
880 fatalx("%s: strlcpy", __func__);
881 n = strlcpy(srv->site_name, D_SITENAME,
882 sizeof(srv->site_name));
883 if (n >= sizeof(srv->site_name))
884 fatalx("%s: strlcpy", __func__);
885 n = strlcpy(srv->site_owner, D_SITEOWNER,
886 sizeof(srv->site_owner));
887 if (n >= sizeof(srv->site_owner))
888 fatalx("%s: strlcpy", __func__);
889 n = strlcpy(srv->site_link, D_SITELINK,
890 sizeof(srv->site_link));
891 if (n >= sizeof(srv->site_link))
892 fatalx("%s: strlcpy", __func__);
893 n = strlcpy(srv->logo, D_GOTLOGO,
895 if (n >= sizeof(srv->logo))
896 fatalx("%s: strlcpy", __func__);
897 n = strlcpy(srv->logo_url, D_GOTURL, sizeof(srv->logo_url));
898 if (n >= sizeof(srv->logo_url))
899 fatalx("%s: strlcpy", __func__);
900 n = strlcpy(srv->custom_css, D_GOTWEBCSS, sizeof(srv->custom_css));
901 if (n >= sizeof(srv->custom_css))
902 fatalx("%s: strlcpy", __func__);
904 srv->show_site_owner = D_SHOWSOWNER;
905 srv->show_repo_owner = D_SHOWROWNER;
906 srv->show_repo_age = D_SHOWAGE;
907 srv->show_repo_description = D_SHOWDESC;
908 srv->show_repo_cloneurl = D_SHOWURL;
909 srv->respect_exportok = D_RESPECTEXPORTOK;
911 srv->max_repos_display = D_MAXREPODISP;
912 srv->max_commits_display = D_MAXCOMMITDISP;
913 srv->max_repos = D_MAXREPO;
915 srv->unix_socket = 1;
916 srv->fcgi_socket = 0;
918 TAILQ_INIT(&srv->al);
919 TAILQ_INSERT_TAIL(&gotwebd->servers, srv, entry);
920 gotwebd->server_cnt++;
926 symset(const char *nam, const char *val, int persist)
930 TAILQ_FOREACH(sym, &symhead, entry) {
931 if (strcmp(nam, sym->nam) == 0)
936 if (sym->persist == 1)
941 TAILQ_REMOVE(&symhead, sym, entry);
945 sym = calloc(1, sizeof(*sym));
949 sym->nam = strdup(nam);
950 if (sym->nam == NULL) {
954 sym->val = strdup(val);
955 if (sym->val == NULL) {
961 sym->persist = persist;
962 TAILQ_INSERT_TAIL(&symhead, sym, entry);
967 cmdline_symset(char *s)
972 val = strrchr(s, '=');
976 sym = strndup(s, val - s);
978 fatal("%s: strndup", __func__);
980 ret = symset(sym, val + 1, 1);
987 symget(const char *nam)
991 TAILQ_FOREACH(sym, &symhead, entry) {
992 if (strcmp(nam, sym->nam) == 0) {
1001 get_addrs(const char *hostname, const char *servname, struct server *new_srv)
1003 struct addrinfo hints, *res0, *res;
1005 struct sockaddr_in *sin;
1006 struct sockaddr_in6 *sin6;
1009 memset(&hints, 0, sizeof(hints));
1010 hints.ai_family = AF_UNSPEC;
1011 hints.ai_socktype = SOCK_STREAM;
1012 hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
1013 error = getaddrinfo(hostname, servname, &hints, &res0);
1015 log_warnx("%s: could not parse \"%s:%s\": %s", __func__,
1016 hostname, servname, gai_strerror(error));
1020 for (res = res0; res; res = res->ai_next) {
1021 if ((h = calloc(1, sizeof(*h))) == NULL)
1024 if (hostname == NULL) {
1025 strlcpy(h->ifname, "*", sizeof(h->ifname));
1027 if (strlcpy(h->ifname, hostname, sizeof(h->ifname)) >=
1028 sizeof(h->ifname)) {
1029 log_warnx("%s: address truncated: %s",
1030 __func__, hostname);
1037 h->ai_family = res->ai_family;
1038 h->ai_socktype = res->ai_socktype;
1039 h->ai_protocol = res->ai_protocol;
1040 memcpy(&h->ss, res->ai_addr, res->ai_addrlen);
1041 h->slen = res->ai_addrlen;
1043 switch (res->ai_family) {
1045 sin = (struct sockaddr_in *)res->ai_addr;
1046 h->port = ntohs(sin->sin_port);
1049 sin6 = (struct sockaddr_in6 *)res->ai_addr;
1050 h->port = ntohs(sin6->sin6_port);
1053 fatalx("unknown address family %d", res->ai_family);
1056 if (add_addr(new_srv, h))
1064 addr_dup_check(struct addresslist *al, struct address *h, const char *new_srv,
1065 const char *other_srv)
1069 char buf[INET6_ADDRSTRLEN];
1070 const char *addrstr;
1072 TAILQ_FOREACH(a, al, entry) {
1073 if (a->ai_family != h->ai_family ||
1074 a->ai_socktype != h->ai_socktype ||
1075 a->ai_protocol != h->ai_protocol ||
1076 a->slen != h->slen ||
1077 memcmp(&a->ss, &h->ss, a->slen) != 0)
1080 switch (h->ss.ss_family) {
1082 ia = &((struct sockaddr_in *)(&h->ss))->sin_addr;
1085 ia = &((struct sockaddr_in6 *)(&h->ss))->sin6_addr;
1088 yyerror("unknown address family: %d", h->ss.ss_family);
1091 addrstr = inet_ntop(h->ss.ss_family, ia, buf, sizeof(buf));
1094 yyerror("server %s: duplicate fcgi listen "
1095 "address %s:%d, already used by server %s",
1096 new_srv, addrstr, h->port, other_srv);
1098 log_warnx("server: %s: duplicate fcgi listen "
1099 "address %s:%d", new_srv, addrstr, h->port);
1103 yyerror("server: %s: duplicate fcgi listen "
1104 "address, already used by server %s",
1105 new_srv, other_srv);
1107 log_warnx("server %s: duplicate fcgi listen "
1108 "address", new_srv);
1119 add_addr(struct server *new_srv, struct address *h)
1123 /* Address cannot be shared between different servers. */
1124 TAILQ_FOREACH(srv, &gotwebd->servers, entry) {
1127 if (addr_dup_check(&srv->al, h, new_srv->name, srv->name))
1131 /* Tolerate duplicate address lines within the scope of a server. */
1132 if (addr_dup_check(&new_srv->al, h, NULL, NULL) == 0)
1133 TAILQ_INSERT_TAIL(&new_srv->al, h, entry);