main.c: Add new command line options for parsing by process name

[scan-pagemap] / main.c

diff --git a/main.c b/main.c
index 8672f858d7e326f07d26f175c86869713b566918..75db46943ec0cf4aca1ed587f5a2df13fa569167 100644 (file)
--- a/main.c
+++ b/main.c
@@ -2,25 +2,83 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <getopt.h>
 
 #include "parse.h"
 #include "analyze.h"
 
+void print_help_and_die(char *name)
+{
+       printf("Usage: %s options \n"
+               "-p, --pid=PID          scan maps belingin to a given pid\n"
+               "-m, --map=mapname      scan maps with given mapping name\n"
+               "-h, --help             show this help\n",
+               name);
+
+       exit(0);
+}
+
+#define OPT_WITH_THREADS       0x101
+
+void read_args(int argc, char *argv[], struct parse_opts *opts)
+{
+       int optind = 0, c;
+       static struct option long_options[] = {
+               { .val = 'p', .name = "pid", .has_arg = 1, },
+               { .val = 'P', .name = "process", .has_arg = 1, },
+               { .val = 'm', .name = "map", .has_arg = 1, },
+               { .val = OPT_WITH_THREADS, .name = "with-threads" },
+               { .val = 'h', .name = "help", },
+       };
+       char short_options[] = "p:P:m:h";
+       opts->parse_mask = 0;
+
+       while (1) {
+               c = getopt_long(argc, argv, short_options, long_options,
+                               &optind);
+
+               if (c == -1)
+                       break;
+
+               printf("%c: %s\n", c, optarg);
+               switch (c) {
+               case 'p':
+                       opts->pid = atoi(optarg);
+                       opts->parse_mask |= PARSE_PID;
+                       break;
+               case 'P':
+                       opts->parse_mask |= PARSE_PROCESS_NAME;
+                       opts->name = optarg;
+               case 'm':
+                       opts->parse_mask |= PARSE_MAP_NAME;
+                       opts->name = optarg;
+                       break;
+               case OPT_WITH_THREADS:
+                       opts->with_threads = 1;
+                       break;
+               case 'h':
+                       print_help_and_die(argv[0]);
+               }
+       }
+}
+
 int main(int argc, char *argv[])
 {
        struct pageframe pf;
        struct process *process_list = NULL;
-       int pid;
+       struct parse_opts opts;
 
-       if (argc < 2) {
+       read_args(argc, argv, &opts);
+
+       if (argc < 3) {
                printf("A pid needs to be given as an argument\n");
-               return 1;
+               print_help_and_die(argv[0]);
        }
 
-       pid = atoi(argv[1]);
-
        memset(&pf, 0, sizeof(pf));
-       scan_all_pids(&pf, &process_list, pid);
+
+       scan_all_pids(&pf, &process_list, &opts);
+       print_pid_stats(&pf, process_list, &opts);
        print_page_stats(&pf);
 
        return 0;