aboutsummaryrefslogtreecommitdiff
path: root/networking/httpd.c
diff options
context:
space:
mode:
authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-05-07 12:18:48 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-05-07 12:18:48 +0000
commit6bf05cf1ff3debbab2bcc482dffb821aa458177b (patch)
tree62e5266ba56c91dc6973f7badfdcfde8e81c2a4a /networking/httpd.c
parentb153ace939f7ab2857605fe10c6ae3ebd903288a (diff)
downloadbusybox-6bf05cf1ff3debbab2bcc482dffb821aa458177b.tar.gz
busybox-6bf05cf1ff3debbab2bcc482dffb821aa458177b.tar.bz2
httpd: fix several bugs triggering by realtive path in -h DIR.
function old new delta handle_incoming_and_exit 2657 2659 +2 send_cgi_and_exit 869 862 -7 parse_conf 1647 1626 -21 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/2 up/down: 2/-28) Total: -26 bytes
Diffstat (limited to 'networking/httpd.c')
-rw-r--r--networking/httpd.c143
1 files changed, 75 insertions, 68 deletions
diff --git a/networking/httpd.c b/networking/httpd.c
index ed699df48..6fd322cb8 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -613,7 +613,12 @@ static void parse_conf(const char *path, int flag)
/* then error page; find matching status */
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
if (http_response_type[i] == status) {
- http_error_page[i] = concat_path_file((*c == '/') ? NULL : home_httpd, c);
+ // We chdir to home_httpd, thus no need to
+ // concat_path_file(home_httpd, c)
+ //if (c[0] == '/' || home_httpd[0] != '/')
+ http_error_page[i] = xstrdup(c);
+ //else
+ // http_error_page[i] = concat_path_file(home_httpd, c);
break;
}
}
@@ -1009,7 +1014,7 @@ static void send_headers(int responseNum)
}
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
- if (error_page && !access(error_page, R_OK)) {
+ if (error_page && access(error_page, R_OK) == 0) {
strcat(iobuf, "\r\n");
len += 2;
@@ -1313,49 +1318,49 @@ static void send_cgi_and_exit(
{
struct fd_pair fromCgi; /* CGI -> httpd pipe */
struct fd_pair toCgi; /* httpd -> CGI pipe */
- char *fullpath;
char *script;
- char *purl;
int pid;
+ /* Make a copy. NB: caller guarantees:
+ * url[0] == '/', url[1] != '/' */
+ url = xstrdup(url);
+
/*
* We are mucking with environment _first_ and then vfork/exec,
- * this allows us to use vfork safely. Parent don't care about
+ * this allows us to use vfork safely. Parent doesn't care about
* these environment changes anyway.
*/
- /*
- * Find PATH_INFO.
- */
- purl = xstrdup(url);
- script = purl;
+ /* Check for [dirs/]script.cgi/PATH_INFO */
+ script = (char*)url;
while ((script = strchr(script + 1, '/')) != NULL) {
- /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
struct stat sb;
*script = '\0';
- if (!is_directory(purl + 1, 1, &sb)) {
+ if (!is_directory(url + 1, 1, &sb)) {
/* not directory, found script.cgi/PATH_INFO */
*script = '/';
break;
}
- *script = '/'; /* is directory, find next '/' */
+ *script = '/'; /* is directory, find next '/' */
}
- setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
+ setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
setenv1("REQUEST_METHOD", request);
if (g_query) {
- putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
+ putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
} else {
- setenv1("REQUEST_URI", purl);
+ setenv1("REQUEST_URI", url);
}
if (script != NULL)
*script = '\0'; /* cut off /PATH_INFO */
- /* SCRIPT_FILENAME required by PHP in CGI mode */
- fullpath = concat_path_file(home_httpd, purl);
- setenv1("SCRIPT_FILENAME", fullpath);
+ /* SCRIPT_FILENAME is required by PHP in CGI mode */
+ if (home_httpd[0] == '/') {
+ char *fullpath = concat_path_file(home_httpd, url);
+ setenv1("SCRIPT_FILENAME", fullpath);
+ }
/* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
- setenv1("SCRIPT_NAME", purl);
+ setenv1("SCRIPT_NAME", url);
/* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
* QUERY_STRING: The information which follows the ? in the URL
* which referenced this script. This is the query information.
@@ -1413,6 +1418,8 @@ static void send_cgi_and_exit(
if (!pid) {
/* Child process */
+ char *argv[3];
+
xfunc_error_retval = 242;
/* NB: close _first_, then move fds! */
@@ -1424,53 +1431,54 @@ static void send_cgi_and_exit(
* If CGI really wants that, it can always do dup itself. */
/* dup2(1, 2); */
- script = strrchr(fullpath, '/');
- //fullpath is a result of concat_path_file and always has '/'
- //if (!script)
- // goto error_execing_cgi;
- *script = '\0';
- /* chdiring to script's dir */
- if (chdir(script == fullpath ? "/" : fullpath) == 0) {
- char *argv[3];
+ /* Chdiring to script's dir */
+ script = strrchr(url, '/');
+ if (script != url) { /* paranoia */
+ *script = '\0';
+ if (chdir(url + 1) != 0) {
+ bb_perror_msg("chdir %s", url + 1);
+ goto error_execing_cgi;
+ }
+ // not needed: *script = '/';
+ }
+ script++;
- *script++ = '/'; /* repair fullpath */
- /* set argv[0] to name without path */
- argv[0] = script;
- argv[1] = NULL;
+ /* set argv[0] to name without path */
+ argv[0] = script;
+ argv[1] = NULL;
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- {
- char *suffix = strrchr(script, '.');
-
- if (suffix) {
- Htaccess *cur;
- for (cur = script_i; cur; cur = cur->next) {
- if (strcmp(cur->before_colon + 1, suffix) == 0) {
- /* found interpreter name */
- fullpath = cur->after_colon;
- argv[0] = cur->after_colon;
- argv[1] = script;
- argv[2] = NULL;
- break;
- }
+ {
+ char *suffix = strrchr(script, '.');
+
+ if (suffix) {
+ Htaccess *cur;
+ for (cur = script_i; cur; cur = cur->next) {
+ if (strcmp(cur->before_colon + 1, suffix) == 0) {
+ /* found interpreter name */
+ argv[0] = cur->after_colon;
+ argv[1] = script;
+ argv[2] = NULL;
+ break;
}
}
}
-#endif
- /* restore default signal dispositions for CGI process */
- bb_signals(0
- | (1 << SIGCHLD)
- | (1 << SIGPIPE)
- | (1 << SIGHUP)
- , SIG_DFL);
-
- execv(fullpath, argv);
- if (verbose)
- bb_perror_msg("exec %s", fullpath);
- } else if (verbose) {
- bb_perror_msg("chdir %s", fullpath);
}
- //error_execing_cgi:
+#endif
+ /* restore default signal dispositions for CGI process */
+ bb_signals(0
+ | (1 << SIGCHLD)
+ | (1 << SIGPIPE)
+ | (1 << SIGHUP)
+ , SIG_DFL);
+
+ /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
+ * without any dir components and will only match a file
+ * in the current directory */
+ execv(argv[0], argv);
+ if (verbose)
+ bb_perror_msg("exec %s", argv[0]);
+ error_execing_cgi:
/* send to stdout
* (we are CGI here, our stdout is pumped to the net) */
send_headers_and_exit(HTTP_NOT_FOUND);
@@ -1889,7 +1897,7 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
/* Canonicalize path */
/* Algorithm stolen from libbb bb_simplify_path(),
- * but don't strdup and reducing trailing slash and protect out root */
+ * but don't strdup, retain trailing slash, protect root */
urlp = tptr = urlcopy;
do {
if (*urlp == '/') {
@@ -1898,11 +1906,11 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
continue;
}
if (*tptr == '.') {
- /* skip extra '.' */
+ /* skip extra "/./" */
if (tptr[1] == '/' || !tptr[1]) {
continue;
}
- /* '..': be careful */
+ /* "..": be careful */
if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
++tptr;
if (urlp == urlcopy) /* protect root */
@@ -1914,11 +1922,10 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
}
*++urlp = *tptr;
} while (*++tptr);
- *++urlp = '\0'; /* so keep last character */
- tptr = urlp; /* end ptr */
+ *++urlp = '\0'; /* terminate after last character */
/* If URL is a directory, add '/' */
- if (tptr[-1] != '/') {
+ if (urlp[-1] != '/') {
if (is_directory(urlcopy + 1, 1, &sb)) {
found_moved_temporarily = urlcopy;
}
@@ -2310,8 +2317,8 @@ int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
/* -v counts, -i implies -f */
opt_complementary = "vv:if";
/* We do not "absolutize" path given by -h (home) opt.
- * If user gives relative path in -h, $SCRIPT_FILENAME can end up
- * relative too. */
+ * If user gives relative path in -h,
+ * $SCRIPT_FILENAME will not be set. */
opt = getopt32(argv, "c:d:h:"
USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
USE_FEATURE_HTTPD_BASIC_AUTH("r:")