linux c 获取系统内存

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void get_memory_info() {
    FILE *meminfo = fopen("/proc/meminfo", "r");
    if (meminfo == NULL) {
        perror("Failed to open /proc/meminfo");
        return;
    }

    char line[256];
    while (fgets(line, sizeof(line), meminfo)) {
        if (strncmp(line, "MemTotal:", 9) == 0) {
            unsigned long total_memory;
            sscanf(line + 9, "%lu", &total_memory);
            printf("Total Memory: %lu kB
", total_memory);
        } else if (strncmp(line, "MemAvailable:", 13) == 0) {
            unsigned long available_memory;
            sscanf(line + 13, "%lu", &available_memory);
            printf("Available Memory: %lu kB
", available_memory);
        }
        // 可以继续解析其他内存信息，如MemFree, Buffers, Cached等
    }

    fclose(meminfo);
}

int main() {
    get_memory_info();
    return 0;
}