/**
* Download URL to local file using the external 'curl' command.
*/
static int
curl_download (const char *url, const char *local_file)
{
char curl_config_file[] = "/tmp/curl.XXXXXX";
char error_file[] = "/tmp/curlerr.XXXXXX";
CLEANUP_FREE char *error_message = NULL;
int fd, r;
size_t i, len;
FILE *fp;
CLEANUP_FREE char *curl_cmd = NULL;
fd = mkstemp (error_file);
if (fd == -1)
error (EXIT_FAILURE, errno, "mkstemp: %s", error_file);
close (fd);
/* Use a secure curl config file because escaping is easier. */
fd = mkstemp (curl_config_file);
if (fd == -1)
error (EXIT_FAILURE, errno, "mkstemp: %s", curl_config_file);
fp = fdopen (fd, "w");
if (fp == NULL)
error (EXIT_FAILURE, errno, "fdopen: %s", curl_config_file);
fprintf (fp, "url = \"");
len = strlen (url);
for (i = 0; i < len; ++i) {
switch (url[i]) {
case '\\': fprintf (fp, "\\\\"); break;
case '"': fprintf (fp, "\\\""); break;
case '\t': fprintf (fp, "\\t"); break;
case '\n': fprintf (fp, "\\n"); break;
case '\r': fprintf (fp, "\\r"); break;
case '\v': fprintf (fp, "\\v"); break;
default: fputc (url[i], fp);
}
}
fprintf (fp, "\"\n");
fclose (fp);
/* Run curl to download the URL to a file. */
if (asprintf (&curl_cmd, "curl -f -s -S -o %s -K %s 2>%s",
local_file, curl_config_file, error_file) == -1)
error (EXIT_FAILURE, errno, "asprintf");
r = system (curl_cmd);
/* unlink (curl_config_file); - useful for debugging */
if (r == -1)
error (EXIT_FAILURE, errno, "system: %s", curl_cmd);
/* Did curl subprocess fail? */
if (WIFEXITED (r) && WEXITSTATUS (r) != 0) {
if (read_whole_file (error_file, &error_message, NULL) == 0)
set_ssh_error ("%s: %s", url, error_message);
else
set_ssh_error ("%s: curl error %d", url, WEXITSTATUS (r));
unlink (error_file);
return -1;
}
else if (!WIFEXITED (r)) {
set_ssh_error ("curl subprocess got a signal (%d)", r);
unlink (error_file);
return -1;
}
unlink (error_file);
return 0;
}
/* Download URL to local file using the external 'curl' command. */
static int
curl_download (const char *url, const char *local_file)
{
char curl_config_file[] = "/tmp/curl.XXXXXX";
int fd, r;
size_t i, len;
FILE *fp;
CLEANUP_FREE char *curl_cmd = NULL;
/* Use a secure curl config file because escaping is easier. */
fd = mkstemp (curl_config_file);
if (fd == -1) {
perror ("mkstemp");
exit (EXIT_FAILURE);
}
fp = fdopen (fd, "w");
if (fp == NULL) {
perror ("fdopen");
exit (EXIT_FAILURE);
}
fprintf (fp, "url = \"");
len = strlen (url);
for (i = 0; i < len; ++i) {
switch (url[i]) {
case '\\': fprintf (fp, "\\\\"); break;
case '"': fprintf (fp, "\\\""); break;
case '\t': fprintf (fp, "\\t"); break;
case '\n': fprintf (fp, "\\n"); break;
case '\r': fprintf (fp, "\\r"); break;
case '\v': fprintf (fp, "\\v"); break;
default: fputc (url[i], fp);
}
}
fprintf (fp, "\"\n");
fclose (fp);
/* Run curl to download the URL to a file. */
if (asprintf (&curl_cmd, "curl -f -o %s -K %s",
local_file, curl_config_file) == -1) {
perror ("asprintf");
exit (EXIT_FAILURE);
}
r = system (curl_cmd);
/* unlink (curl_config_file); - useful for debugging */
if (r == -1) {
perror ("system");
exit (EXIT_FAILURE);
}
/* Did curl subprocess fail? */
if (WIFEXITED (r) && WEXITSTATUS (r) != 0) {
/* XXX Better error handling. The codes can be looked up in
* the curl(1) man page.
*/
set_ssh_error ("%s: curl error %d", url, WEXITSTATUS (r));
return -1;
}
else if (!WIFEXITED (r)) {
set_ssh_error ("curl subprocess got a signal (%d)", r);
return -1;
}
return 0;
}
