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/************************************************************************
* This file is part of Paramano. *
* *
* Paramano is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* Paramano is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with Paramano. If not, see *
* <http://www.gnu.org/licenses/>. *
************************************************************************/
#include "paramano.h"
#define FILE_PATH_STRING_SIZE 100
#define ARG_CORE 0x1
#define ARG_GOV 0x2
#define ARG_FREQ 0x4
typedef struct {
char present;
char *core;
char *governor;
char *frequency;
} argument_summary;
char write_str_to_file(const char *file, const char *data, const char *core)
{
FILE *fd;
char file_path[FILE_PATH_STRING_SIZE];
// Prepare file path
memset(file_path, '\0', sizeof(file_path));
sprintf(file_path, "/sys/devices/system/cpu/cpu%d/cpufreq/%s", atoi(core), file );
// Try to open file and write data to it
if ( (fd = fopen(file_path, "w")) != NULL )
{
debug("Writing '%s' to '%s'\n",data,file_path);
fprintf(fd, data);
fclose(fd);
return 1;
}
// Fallthrough: File couldn't be opened for writing
fprintf(stderr, _("FAILED: Couldn't open %s for writing\n") , file_path);
return 0;
}
#define set_freq_max(freq,core) write_str_to_file("scaling_max_freq",freq,core)
#define set_freq_min(freq,core) write_str_to_file("scaling_min_freq",freq,core)
#define set_speed(freq,core) write_str_to_file("scaling_setspeed",freq,core)
#define set_gov(gov,core) write_str_to_file("scaling_governor",gov,core)
void get_argument_summary(int argc, char **argv, argument_summary *argsum)
{
int arg;
// Check for -{c,g,f} xyz
for ( arg = 1; arg < argc-1; arg+=2 )
{
// Can't have empty argument
if ( strlen(argv[arg+1]) != 0 )
{
if ( strcmp(argv[arg], "-c") == 0 )
{
// Found -c with an arg
debug("Found -c with arg '%s'\n",argv[arg+1]);
argsum->present |= ARG_CORE;
argsum->core = (char*)(argv[arg+1]);
continue;
}
if ( strcmp(argv[arg], "-f") == 0 )
{
// Found -f with an arg
debug("Found -f with arg '%s'\n",argv[arg+1]);
argsum->present |= ARG_FREQ;
argsum->frequency = (char*)(argv[arg+1]);
continue;
}
if ( strcmp(argv[arg], "-g") == 0 )
{
// Found -g with an arg
debug("Found -g with arg '%s'\n",argv[arg+1]);
argsum->present |= ARG_GOV;
argsum->governor = (char*)(argv[arg+1]);
//continue;
}
}
}
}
int main(int argc, char *argv[])
{
setlocale(LC_ALL,"");
bindtextdomain("paramano",LOCALEDIR);
textdomain("paramano");
debug("Set gettext up\n");
argument_summary args;
memset(&args, 0, sizeof(args));
// If unusual number of args, give up now
if (argc == 5)
{
debug ("Checking UID\n");
if (getuid() != 0)
fprintf(stderr,"Warning: running as UID %d, not 0\n",getuid() );
get_argument_summary(argc, argv, &args);
debug("Correct number of command line arguments\n");
debug("-c: %s -g: %s -f: %s\n", (args.present & ARG_CORE )? "Yes":"No",
(args.present & ARG_GOV )? "Yes":"No",
(args.present & ARG_FREQ )? "Yes":"No" );
debug("Core: %s\n",args.core);
debug("Gov : %s\n",args.governor);
debug("Freq: %s\n",args.frequency);
if ( args.present == ( ARG_CORE | ARG_GOV ) )
{
debug("Changing governor\n");
return set_gov(args.governor , args.core);
}
if ( args.present == ( ARG_CORE | ARG_FREQ ) )
{
debug("Changing frequency\n");
return set_gov("userspace", args.core) | set_speed(args.frequency, args.core);
}
}
// Fall through to here if no valid argument combination
debug("Fell through, showing command usage\n");
fprintf(stderr, _("%s {-f frequency|-g governor} -c core\n"), argv[0] );
return 1;
}
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