main: Print warning if root priviledges are not available

Without root priviledges, reading only the user's own processes is
possible. Thus, the results usually don't contain all of the possible
results.

Signed-off-by: Timo Kokkonen <kaapeli@itanic.dy.fi>

diff --git a/main.c b/main.c
index 502e0c3a80f83821a519b136a50de9bcaf5138dd..60efb67602b68502db81e6f7fde55b15c82f588e 100644 (file)
--- a/main.c
+++ b/main.c
@@ -3,6 +3,8 @@
 #include <string.h>
 #include <errno.h>
 #include <getopt.h>
+#include <unistd.h>
+#include <sys/types.h>
 
 #include "parse.h"
 #include "analyze.h"
@@ -76,6 +78,11 @@ int main(int argc, char *argv[])
        struct process *process_list = NULL;
        struct parse_opts opts;
 
+       if (getuid()) {
+               printf("WARNING: Running without root priviledges. "
+                       "Results may be inaccurate\n");
+       }
+
        memset(&opts, 0, sizeof(opts));
 
        read_args(argc, argv, &opts);