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/* cfetch is my try to implement a neofetch/fastfetch/commiefetch clone in C.
* Copyright (C) 2026 Anser <https://codeberg.org/Anser/cfetch>
*
* cfetch 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.
*
* cfetch 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "../include/cfetch.h"
#include <stdbool.h>
#include <sys/utsname.h>
#include <unistd.h>
void get_kernel(struct system_info_t *info)
{
#ifdef __linux__
struct utsname u;
if (uname(&u) == 0) {
snprintf(info->kernel, sizeof(info->kernel), "%.30s %.30s", u.sysname, u.release);
} else {
perror("Error while accessing uname");
return;
}
#endif
return;
}
void get_cpu(struct system_info_t *info)
{
FILE* file = fopen("/proc/cpuinfo", "r");
//check file existence
if (!file) {
snprintf(info->cpu, sizeof(info->cpu), "Unknown");
return;
}
char line[256];
char *cpu_name = NULL;
//read per line
while (fgets(line, sizeof(line), file)) {
char* p = strstr(line, "model name");
if (p != NULL) {
cpu_name = strchr(p, ':') + 1; //skip :
break;
}
}
if (cpu_name != NULL) {
snprintf(info->cpu, sizeof(info->cpu), "%s", trim_whitespace(cpu_name));
}
fclose(file);
return;
}
void get_memory(struct system_info_t *info)
{
FILE *file = fopen("/proc/meminfo", "r");
if (!file) {
snprintf(info->memory, sizeof(info->memory), "Unknown");
return;
}
char line[256];
long total = 0;
long available = 0;
// read per line
while (fgets(line, sizeof(line), file)) {
if (sscanf(line, "MemTotal: %ld kB", &total) == 1) continue;
if (sscanf(line, "MemAvailable: %ld kB", &available) == 1) continue;
}
fclose(file);
snprintf(info->memory, sizeof(info->memory), "Memory %.2f GB / %.2f GB",
(total - available) / (1024.0 * 1024.0), total / (1024.0 * 1024.0));
return;
}
bool get_os_release_value(char *line, const char *key, char *buffer, size_t size_out)
{
if (!line || !key || !buffer || size_out == 0) return false;
size_t key_len = strlen(key);
if (key_len == 0) return false;
if (strncmp(line, key, key_len) != 0) return false;
// '=' pointer
char *eq = strchr(line, '=');
if (!eq) return false;
char *val = trim_whitespace(eq + 1);
if (*val == '"' || *val == '\'') {
char quote = *val; // safe which char was used
val++;
char *end = strchr(val, quote);
if (end != NULL) {
*end = '\0';
} else {
char *nl = strchr(val, '\n');
if (nl) *nl = '\0';
}
} else {
char *nl = strchr(val, '\n');
if (nl) *nl = '\0';
}
snprintf(buffer, size_out, "%s", val);
return true;
}
void get_os_release(struct system_info_t *info)
{
FILE *file;
char line[256];
char id[64] = { 0 };
char version_id[64] = { 0 };
char pretty_name[64] = { 0 };
file = fopen("/etc/os-release", "r");
if (!file) {
file = fopen("/usr/lib/os-release", "r");
}
if (!file) {
snprintf(info->distro, sizeof(info->distro), "Unknown");
return;
}
// get ID, PRETTY_NAME, VERSION_ID
while (fgets(line, sizeof(line), file)) {
if (get_os_release_value(line, "ID", id, sizeof(id))) continue;
if (get_os_release_value(line, "PRETTY_NAME", pretty_name, sizeof(pretty_name))) continue;
if (get_os_release_value(line, "VERSION_ID", version_id, sizeof(version_id))) continue;
}
// set OS
if (pretty_name[0] != '\0') {
snprintf(info->distro, sizeof(info->distro), "%s", pretty_name);
} else if (id[0] != '\0' && version_id[0] != '\0') {
snprintf(info->distro, sizeof(info->distro), "%s %s", id, version_id);
}
fclose(file);
return;
}
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