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authorDenis Vlasenko2006-10-07 14:28:55 +0000
committerDenis Vlasenko2006-10-07 14:28:55 +0000
commit96e9d3c968b252c0dac5b497c003e961bd408570 (patch)
tree19a894496a6ad840f1b1055c3f62dac5af236d60 /networking
parenta655152b0045a9ac39718dcbf60b314f32c43413 (diff)
downloadbusybox-96e9d3c968b252c0dac5b497c003e961bd408570.zip
busybox-96e9d3c968b252c0dac5b497c003e961bd408570.tar.gz
wget: don't be careless with xstrdup'ing
Diffstat (limited to 'networking')
-rw-r--r--networking/wget.c42
1 files changed, 24 insertions, 18 deletions
diff --git a/networking/wget.c b/networking/wget.c
index 3f36e48..788c291 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -30,6 +30,8 @@
#endif
struct host_info {
+ // May be used if we ever will want to free() all xstrdup()s...
+ /* char *allocated; */
char *host;
int port;
char *path;
@@ -136,14 +138,16 @@ int wget_main(int argc, char **argv)
struct sockaddr_in s_in;
llist_t *headers_llist = NULL;
+ /* server.allocated = target.allocated = NULL; */
+
FILE *sfp = NULL; /* socket to web/ftp server */
FILE *dfp = NULL; /* socket to ftp server (data) */
char *fname_out = NULL; /* where to direct output (-O) */
int got_clen = 0; /* got content-length: from server */
int output_fd = -1;
int use_proxy = 1; /* Use proxies if env vars are set */
- char *proxy_flag = "on"; /* Use proxies if env vars are set */
- char *user_agent = "Wget"; /* Content of the "User-Agent" header field */
+ const char *proxy_flag = "on"; /* Use proxies if env vars are set */
+ const char *user_agent = "Wget";/* Content of the "User-Agent" header field */
/*
* Crack command line.
@@ -185,7 +189,7 @@ int wget_main(int argc, char **argv)
if (use_proxy) {
proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
if (proxy && *proxy) {
- parse_url(xstrdup(proxy), &server);
+ parse_url(proxy, &server);
} else {
use_proxy = 0;
}
@@ -306,14 +310,14 @@ read_response:
if (fgets(buf, sizeof(buf), sfp) == NULL)
bb_error_msg_and_die("no response from server");
- for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
- ;
- for ( ; isspace(*s) ; ++s)
- ;
+ s = buf;
+ while (*s != '\0' && !isspace(*s)) ++s;
+ while (isspace(*s)) ++s;
switch (status = atoi(s)) {
case 0:
case 100:
- while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
+ while (gethdr(buf, sizeof(buf), sfp, &n) != NULL)
+ /* eat all remaining headers */;
goto read_response;
case 200:
break;
@@ -328,7 +332,7 @@ read_response:
/*FALLTHRU*/
default:
chomp(buf);
- bb_error_msg_and_die("server returned error %d: %s", atoi(s), buf);
+ bb_error_msg_and_die("server returned error %s: %s", s, buf);
}
/*
@@ -351,10 +355,10 @@ read_response:
}
if (strcasecmp(buf, "location") == 0) {
if (s[0] == '/')
- // FIXME: this is dirty
- target.path = xstrdup(s+1);
+ /* free(target.allocated); */
+ target.path = /* target.allocated = */ xstrdup(s+1);
else {
- parse_url(xstrdup(s), &target);
+ parse_url(s, &target);
if (use_proxy == 0) {
server.host = target.host;
server.port = target.port;
@@ -368,9 +372,9 @@ read_response:
} while(status >= 300);
dfp = sfp;
- }
- else
- {
+
+ } else {
+
/*
* FTP session
*/
@@ -499,9 +503,11 @@ read_response:
}
-static void parse_url(char *url, struct host_info *h)
+static void parse_url(char *src_url, struct host_info *h)
{
- char *p, *cp, *sp, *up, *pp;
+ char *url, *p, *cp, *sp, *up, *pp;
+
+ /* h->allocated = */ url = xstrdup(src_url);
if (strncmp(url, "http://", 7) == 0) {
h->port = bb_lookup_port("http", "tcp", 80);
@@ -517,7 +523,7 @@ static void parse_url(char *url, struct host_info *h)
// FYI:
// "Real" wget 'http://busybox.net?var=a/b' sends this request:
// 'GET /?var=a/b HTTP 1.0'
- // and saves 'index.html?var=a%2Fb'
+ // and saves 'index.html?var=a%2Fb' (we save 'b')
// wget 'http://busybox.net?login=john@doe':
// request: 'GET /?login=john@doe HTTP/1.0'
// saves: 'index.html?login=john@doe' (we save ?login=john@doe)