diff options
Diffstat (limited to 'lib/proc.c')
| -rw-r--r-- | lib/proc.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/lib/proc.c b/lib/proc.c deleted file mode 100644 index 38d8483..0000000 --- a/lib/proc.c +++ /dev/null @@ -1,216 +0,0 @@ -/* - * (C) 2004 Dominik Brodowski <linux@dominikbrodowski.de> - * - * Licensed under the terms of the GNU GPL License version 2. - */ - -#include <stdio.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> - -#include "cpufreq.h" - -#define MAX_LINE_LEN 255 - -static int readout_proc_cpufreq(unsigned int cpu, unsigned long *min, unsigned long *max, char **governor) -{ - FILE *fp; - char value[MAX_LINE_LEN]; - char gov_value[MAX_LINE_LEN]; - int ret = -ENODEV; - unsigned int cpu_read; - unsigned int tmp1, tmp2; - - if ((!min) || (!max) || (!governor)) - return -EINVAL; - - fp = fopen("/proc/cpufreq","r"); - if (!fp) - return -ENODEV; - - - if (!fgets(value, MAX_LINE_LEN, fp)) { - ret = -EIO; - goto error; - } - - if (strlen(value) > (MAX_LINE_LEN - 10)) { - ret = -EIO; - goto error; - } - - while(!feof(fp)) { - if (!fgets(value, MAX_LINE_LEN, fp)) { - ret = -EIO; - goto error; - } - - if (strlen(value) > (MAX_LINE_LEN - 10)) { - ret = -EIO; - goto error; - } - - ret = sscanf(value, "CPU%3d %9lu kHz (%3d %%) - %9lu kHz (%3d %%) - %s", - &cpu_read , min, &tmp1, max, &tmp2, gov_value); - if (ret != 6) { - ret = -EIO; - goto error; - } - - if (cpu_read != cpu) - continue; - - if ((tmp2 < tmp1) || (tmp2 > 100) || (*max < *min)) { - ret = -ENOSYS; - goto error; - } - - tmp1 = strlen(gov_value); - if (tmp1 > 20) { - ret = -ENOSYS; - goto error; - } - - *governor = malloc(sizeof(char) * (tmp1 + 2)); - if (!*governor) { - ret = -ENOMEM; - goto error; - } - - strncpy(*governor, gov_value, tmp1); - (*governor)[tmp1] = '\0'; - - ret = 0; - - break; - } - - error: - fclose(fp); - return (ret); -} - -int proc_cpu_exists(unsigned int cpu) { - unsigned long tmp1, tmp2; - char *tmp3; - int ret; - - ret = readout_proc_cpufreq(cpu, &tmp1, &tmp2, &tmp3); - if (ret) - return -ENODEV; - - free(tmp3); - return 0; -} - -struct cpufreq_policy * proc_get_policy(unsigned int cpu) { - struct cpufreq_policy tmp; - struct cpufreq_policy *ret; - int err; - - err = readout_proc_cpufreq(cpu, &tmp.min, &tmp.max, &tmp.governor); - if (err) - return NULL; - - ret = malloc(sizeof(struct cpufreq_policy)); - if (!ret) - return NULL; - - ret->min = tmp.min; - ret->max = tmp.max; - ret->governor = tmp.governor; - - return (ret); -} - -unsigned long proc_get_freq_kernel(unsigned int cpu) { - FILE *fp; - char value[MAX_LINE_LEN]; - char file[MAX_LINE_LEN]; - unsigned long value2; - - snprintf(file, MAX_LINE_LEN, "/proc/sys/cpu/%u/speed", cpu); - - fp = fopen(file,"r"); - if (!fp) - return 0; - - if (!fgets(value, MAX_LINE_LEN, fp)) { - fclose(fp); - return 0; - } - - fclose(fp); - - if (strlen(value) > (MAX_LINE_LEN - 10)) { - return 0; - } - - if (sscanf(value, "%lu", &value2) != 1) - return 0; - - return value2; -} - -int proc_set_policy(unsigned int cpu, struct cpufreq_policy *policy) { - FILE *fp; - char value[MAX_LINE_LEN]; - int ret = -ENODEV; - - if ((!policy) || (!policy->governor) || (strlen(policy->governor) > 15)) - return -EINVAL; - - snprintf(value, MAX_LINE_LEN, "%d:%lu:%lu:%s", cpu, policy->min, policy->max, policy->governor); - - value[MAX_LINE_LEN - 1]='\0'; - - fp = fopen("/proc/cpufreq","r+"); - if (!fp) - return -ENODEV; - ret = fputs(value, fp); - fclose(fp); - - if (ret < 0) - return (ret); - - return 0; -} - -int proc_set_frequency(unsigned int cpu, unsigned long target_frequency) { - struct cpufreq_policy *pol = proc_get_policy(cpu); - struct cpufreq_policy new_pol; - char userspace_gov[] = "userspace"; - FILE *fp; - char value[MAX_LINE_LEN]; - char file[MAX_LINE_LEN]; - int ret = 0; - - if (!pol) - return -ENODEV; - - if (strncmp(pol->governor, userspace_gov, 9) != 0) { - cpufreq_put_policy(pol); - new_pol.min = pol->min; - new_pol.max = pol->max; - new_pol.governor = userspace_gov; - ret = proc_set_policy(cpu, &new_pol); - if (ret) - return (ret); - } - - - snprintf(file, MAX_LINE_LEN, "/proc/sys/cpu/%u/speed", cpu); - snprintf(value, MAX_LINE_LEN, "%lu", target_frequency); - - fp = fopen(file,"r+"); - if (!fp) - return -EINVAL; - ret = fputs(value, fp); - fclose(fp); - - if (ret < 0) - return (ret); - - return 0; -} |