examples: Use snprintf() instead of sprintf() in dpfp and dpfp_threaded

The OpenBSD C compiler generates a warning for every use of sprintf()
and for a good reason. Reported in http://marc.info/?m=133376187514495

Reported-by: Xiaofan Chen <xiaofanc@gmail.com>

diff --git a/examples/dpfp.c b/examples/dpfp.c
index 7652407..55daff8 100644 (file)
--- a/examples/dpfp.c
+++ b/examples/dpfp.c
@@ -226,7 +226,7 @@ static int save_to_file(unsigned char *data)
        FILE *fd;
        char filename[64];
 
-       sprintf(filename, "finger%d.pgm", img_idx++);
+       snprintf(filename, sizeof(filename), "finger%d.pgm", img_idx++);
        fd = fopen(filename, "w");
        if (!fd)
                return -1;

diff --git a/examples/dpfp_threaded.c b/examples/dpfp_threaded.c
index a46d885..a0557c2 100644 (file)
--- a/examples/dpfp_threaded.c
+++ b/examples/dpfp_threaded.c
@@ -255,7 +255,7 @@ static int save_to_file(unsigned char *data)
        FILE *fd;
        char filename[64];
 
-       sprintf(filename, "finger%d.pgm", img_idx++);
+       snprintf(filename, sizeof(filename), "finger%d.pgm", img_idx++);
        fd = fopen(filename, "w");
        if (!fd)
                return -1;