*/
#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
char buf[512];
FILE *fp;
int ret;
+ int got_dev_urandom = 0;
- if (read_dev_urandom(buf, 32))
+ if (read_dev_urandom(buf, 32)) {
+ got_dev_urandom = 1;
func(buf, 32);
+ }
fp = popen("ps -axu 2>/dev/null", "r");
- while ( (ret = fread(buf, 1, sizeof(buf), fp)) > 0)
- func(buf, ret);
- pclose(fp);
+ if (fp) {
+ while ( (ret = fread(buf, 1, sizeof(buf), fp)) > 0)
+ func(buf, ret);
+ pclose(fp);
+ } else if (!got_dev_urandom) {
+ fprintf(stderr, "popen: %s\n"
+ "Unable to access fallback entropy source\n", strerror(errno));
+ exit(1);
+ }
fp = popen("ls -al /tmp 2>/dev/null", "r");
- while ( (ret = fread(buf, 1, sizeof(buf), fp)) > 0)
- func(buf, ret);
- pclose(fp);
+ if (fp) {
+ while ( (ret = fread(buf, 1, sizeof(buf), fp)) > 0)
+ func(buf, ret);
+ pclose(fp);
+ } else if (!got_dev_urandom) {
+ fprintf(stderr, "popen: %s\n"
+ "Unable to access fallback entropy source\n", strerror(errno));
+ exit(1);
+ }
read_random_seed(func);
random_save_seed();