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