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authorGravatar Christian Hesse <mail@eworm.de>2013-05-29 18:06:34 +0200
committerGravatar Christian Hesse <mail@eworm.de>2013-05-29 18:06:34 +0200
commit44d443998796f75f538c66a48d93b48d39a90db7 (patch)
treebd69b68a96430eac69773b190625d011cbb62351 /cqrlogo.c
parent18998289da11226ea180b1f6bbcb103473d36b6c (diff)
downloadcqrlogo-44d443998796f75f538c66a48d93b48d39a90db7.tar.gz
cqrlogo-44d443998796f75f538c66a48d93b48d39a90db7.tar.zst
error handling and memory management0.1.1
Diffstat (limited to 'cqrlogo.c')
-rw-r--r--cqrlogo.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/cqrlogo.c b/cqrlogo.c
index 43e353f..900c6f5 100644
--- a/cqrlogo.c
+++ b/cqrlogo.c
@@ -57,8 +57,8 @@ GdkPixbuf * encode_qrcode (char *text) {
int main(int argc, char **argv) {
char * http_referer, * server_name, * pattern;
regex_t preg;
- size_t nmatch;
- regmatch_t pmatch[2];
+ size_t nmatch = 1;
+ regmatch_t pmatch[1];
int rc;
GdkPixbuf *pixbuf;
@@ -69,16 +69,16 @@ int main(int argc, char **argv) {
/* check if we have environment variables from CGI */
if ((http_referer = getenv("HTTP_REFERER")) == NULL ||
(server_name = getenv("SERVER_NAME")) == NULL) {
- printf("This is a CGI executable. Running without a web service is not supported.\n"
+ fprintf(stderr, "This is a CGI executable. Running without a web service is not supported.\n"
"Note that HTTP_REFERER and SERVER_NAME need to be defined.\n");
return EXIT_FAILURE;
}
/* prepare pattern matching */
- pattern = malloc(11 + strlen(server_name));
+ pattern = malloc(10 + strlen(server_name));
sprintf(pattern, "^http://%s/", server_name);
if ((rc = regcomp(&preg, pattern, 0)) != 0)
- printf("regcomp() failed, returning nonzero (%d)\n", rc);
+ fprintf(stderr, "regcomp() failed, returning nonzero (%d)\n", rc);
/* check if the QR-Code is for the correct server */
if ((rc = regexec(&preg, http_referer, nmatch, pmatch, 0)) != 0) {
@@ -89,19 +89,23 @@ int main(int argc, char **argv) {
regfree(&preg);
free(pattern);
- if (pixbuf = encode_qrcode(http_referer)) {
- /* print HTTP header */
- printf("Content-Type: image/png\n\n");
-
- /* print PNG data */
- gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &size, "png", NULL, NULL);
- fwrite (buffer, 1, size, stdout);
- } else {
- printf("Error?!\n");
+ if ((pixbuf = encode_qrcode(http_referer)) == NULL) {
+ if ((pixbuf = encode_qrcode(server_name)) == NULL) {
+ fprintf(stderr, "Could not generate QR-Code.\n");
+ return EXIT_FAILURE;
+ }
}
+ /* print HTTP header */
+ printf("Content-Type: image/png\n\n");
+
+ /* print PNG data */
+ gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &size, "png", NULL, NULL);
+ fwrite (buffer, 1, size, stdout);
+
if (rc)
free(http_referer);
+ g_object_unref(pixbuf);
return EXIT_SUCCESS;
}