mirror of
https://github.com/Dr-Noob/cpufetch.git
synced 2026-03-25 16:00:39 +01:00
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
#include <errno.h>
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#include <string.h>
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#include "../common/global.h"
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#include "udev.h"
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#define _PATH_DEVTREE "/proc/device-tree/compatible"
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#define CPUINFO_UARCH_STR "uarch\t\t: "
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#define CPUINFO_EXTENSIONS_STR "isa\t\t: "
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#define DEVTREE_HARDWARE_FIELD 0
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char* get_field_from_devtree(int DEVTREE_FIELD) {
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int filelen;
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char* buf;
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if((buf = read_file(_PATH_DEVTREE, &filelen)) == NULL) {
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printWarn("read_file: %s: %s", _PATH_DEVTREE, strerror(errno));
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return NULL;
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}
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// Here we would use strstr to find the comma.
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// However, the device-tree file may contain NULL
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// bytes in the middle of the string, which would
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// cause strstr to return NULL even when there might
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// be an occurence after the NULL byte
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//
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// We iterate the string backwards to find the field
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// in position n-DEVTREE_HARDWARE_FIELD where n
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// is the number of fields.
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int i=0;
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char* tmp1 = buf+filelen-1;
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do {
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tmp1--;
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if(*tmp1 == ',') i++;
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} while(tmp1 != buf && i <= DEVTREE_FIELD);
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if(tmp1 == buf) {
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printWarn("get_field_from_devtree: Unable to find field %d", DEVTREE_FIELD);
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return NULL;
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}
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tmp1++;
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int strlen = filelen-(tmp1-buf);
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char* hardware = ecalloc(strlen, sizeof(char));
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strncpy(hardware, tmp1, strlen-1);
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return hardware;
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}
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char* parse_cpuinfo_field(char* field_str) {
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int filelen;
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char* buf;
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if((buf = read_file(_PATH_CPUINFO, &filelen)) == NULL) {
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printWarn("read_file: %s: %s", _PATH_CPUINFO, strerror(errno));
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return NULL;
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}
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char* tmp = strstr(buf, field_str);
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if(tmp == NULL) {
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printWarn("parse_cpuinfo_field: Unable to find field %s", field_str);
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return NULL;
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}
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tmp += strlen(field_str);
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char* end = strstr(tmp, "\n");
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if(end == NULL) {
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printWarn("parse_cpuinfo_field: Unable to find newline after field %s", field_str);
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return NULL;
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}
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int ret_strlen = (end-tmp);
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char* ret = ecalloc(ret_strlen+1, sizeof(char));
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strncpy(ret, tmp, sizeof(char) * ret_strlen);
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return ret;
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}
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char* get_hardware_from_devtree(void) {
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return get_field_from_devtree(DEVTREE_HARDWARE_FIELD);
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}
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char* get_uarch_from_cpuinfo(void) {
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return parse_cpuinfo_field(CPUINFO_UARCH_STR);
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}
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char* get_extensions_from_cpuinfo(void) {
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return parse_cpuinfo_field(CPUINFO_EXTENSIONS_STR);
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}
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