1*9c5db199SXin Li /*
2*9c5db199SXin Li * Copyright 2007, Intel Corporation
3*9c5db199SXin Li *
4*9c5db199SXin Li * This file is part of PowerTOP
5*9c5db199SXin Li *
6*9c5db199SXin Li * This program file is free software; you can redistribute it and/or modify it
7*9c5db199SXin Li * under the terms of the GNU General Public License as published by the
8*9c5db199SXin Li * Free Software Foundation; version 2 of the License.
9*9c5db199SXin Li *
10*9c5db199SXin Li * This program is distributed in the hope that it will be useful, but WITHOUT
11*9c5db199SXin Li * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12*9c5db199SXin Li * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13*9c5db199SXin Li * for more details.
14*9c5db199SXin Li *
15*9c5db199SXin Li * You should have received a copy of the GNU General Public License
16*9c5db199SXin Li * along with this program in a file named COPYING; if not, write to the
17*9c5db199SXin Li * Free Software Foundation, Inc.,
18*9c5db199SXin Li * 51 Franklin Street, Fifth Floor,
19*9c5db199SXin Li * Boston, MA 02110-1301 USA
20*9c5db199SXin Li *
21*9c5db199SXin Li * Authors:
22*9c5db199SXin Li * Arjan van de Ven <[email protected]>
23*9c5db199SXin Li */
24*9c5db199SXin Li
25*9c5db199SXin Li #include <unistd.h>
26*9c5db199SXin Li #include <stdio.h>
27*9c5db199SXin Li #include <stdlib.h>
28*9c5db199SXin Li #include <string.h>
29*9c5db199SXin Li #include <stdint.h>
30*9c5db199SXin Li #include <sys/types.h>
31*9c5db199SXin Li #include <dirent.h>
32*9c5db199SXin Li
33*9c5db199SXin Li #include "powertop.h"
34*9c5db199SXin Li
35*9c5db199SXin Li /* static arrays are not nice programming.. but they're easy */
36*9c5db199SXin Li static char configlines[5000][100];
37*9c5db199SXin Li static int configcount;
38*9c5db199SXin Li
read_kernel_config(void)39*9c5db199SXin Li static void read_kernel_config(void)
40*9c5db199SXin Li {
41*9c5db199SXin Li FILE *file;
42*9c5db199SXin Li char version[100], *c;
43*9c5db199SXin Li char filename[100];
44*9c5db199SXin Li if (configcount)
45*9c5db199SXin Li return;
46*9c5db199SXin Li if (access("/proc/config.gz", R_OK) == 0) {
47*9c5db199SXin Li file = popen("zcat /proc/config.gz 2> /dev/null", "r");
48*9c5db199SXin Li while (file && !feof(file)) {
49*9c5db199SXin Li char line[100];
50*9c5db199SXin Li if (fgets(line, 100, file) == NULL)
51*9c5db199SXin Li break;
52*9c5db199SXin Li strcpy(configlines[configcount++], line);
53*9c5db199SXin Li }
54*9c5db199SXin Li pclose(file);
55*9c5db199SXin Li return;
56*9c5db199SXin Li }
57*9c5db199SXin Li file = fopen("/proc/sys/kernel/osrelease", "r");
58*9c5db199SXin Li if (!file)
59*9c5db199SXin Li return;
60*9c5db199SXin Li if (fgets(version, 100, file) == NULL) {
61*9c5db199SXin Li fclose(file);
62*9c5db199SXin Li return;
63*9c5db199SXin Li }
64*9c5db199SXin Li fclose(file);
65*9c5db199SXin Li c = strchr(version, '\n');
66*9c5db199SXin Li if (c)
67*9c5db199SXin Li *c = 0;
68*9c5db199SXin Li sprintf(filename, "/boot/config-%s", version);
69*9c5db199SXin Li file = fopen(filename, "r");
70*9c5db199SXin Li if (!file) {
71*9c5db199SXin Li sprintf(filename, "/lib/modules/%s/build/.config", version);
72*9c5db199SXin Li file = fopen(filename, "r");
73*9c5db199SXin Li }
74*9c5db199SXin Li if (!file)
75*9c5db199SXin Li return;
76*9c5db199SXin Li while (!feof(file)) {
77*9c5db199SXin Li char line[100];
78*9c5db199SXin Li if (fgets(line, 100, file) == NULL)
79*9c5db199SXin Li break;
80*9c5db199SXin Li strcpy(configlines[configcount++], line);
81*9c5db199SXin Li }
82*9c5db199SXin Li fclose(file);
83*9c5db199SXin Li }
84*9c5db199SXin Li
85*9c5db199SXin Li /*
86*9c5db199SXin Li * Suggest the user to turn on/off a kernel config option.
87*9c5db199SXin Li * "comment" gets displayed if it's not already set to the right value
88*9c5db199SXin Li */
suggest_kernel_config(char * string,int onoff,char * comment,int weight)89*9c5db199SXin Li void suggest_kernel_config(char *string, int onoff, char *comment, int weight)
90*9c5db199SXin Li {
91*9c5db199SXin Li int i;
92*9c5db199SXin Li char searchon[100];
93*9c5db199SXin Li char searchoff[100];
94*9c5db199SXin Li int found = 0;
95*9c5db199SXin Li
96*9c5db199SXin Li read_kernel_config();
97*9c5db199SXin Li
98*9c5db199SXin Li sprintf(searchon, "%s=", string);
99*9c5db199SXin Li sprintf(searchoff, "# %s is not set", string);
100*9c5db199SXin Li
101*9c5db199SXin Li for (i = 0; i < configcount; i++) {
102*9c5db199SXin Li if (onoff && strstr(configlines[i], searchon))
103*9c5db199SXin Li return;
104*9c5db199SXin Li if (onoff==0 && strstr(configlines[i], searchoff))
105*9c5db199SXin Li return;
106*9c5db199SXin Li if (onoff==0 && strstr(configlines[i], searchon))
107*9c5db199SXin Li found = 1;
108*9c5db199SXin Li }
109*9c5db199SXin Li if (onoff || found)
110*9c5db199SXin Li add_suggestion(comment, weight, 0, NULL, NULL);
111*9c5db199SXin Li fflush(stdout);
112*9c5db199SXin Li }
113