Pi66

sta
minimal & simple status monitoring app.
git clone https://git.pi66.xyz/sta

components/run_command.c 

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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <string.h>

const char *
run_command(const char *cmd)
{
    static _Thread_local char buf[1024];
    char *p;
    FILE *fp;

    if (!(fp = popen(cmd, "r"))) {
        fprintf(stderr,"error '%s':", cmd);
        return "";
    }

    p = fgets(buf, sizeof(buf) - 1, fp);
    if (pclose(fp) < 0) {
        fprintf(stderr,"pclose '%s':", cmd);
        return "";
    }
    if (!p)
        return "";

    if ((p = strrchr(buf, '\n')))
        p[0] = '\0';

    return buf[0] ? buf : "";
}