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From: Joerg Schmitz-Linneweber <joerg@schmitz-linneweber.name>
Newsgroups: comp.os.linux.embedded
Subject: Re: Reading /proc/stat btime from user space
Date: Fri, 18 Jan 2013 16:41:10 +0100
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Xref: csiph.com comp.os.linux.embedded:438

Hi!

Am 17.01.2013 23:20, schrieb SJC:
> static void get_boottime(char *boottime) {
> 
>         FILE *fp;
>         int status;
> 
>         fp = popen("awk '/^btime/' /proc/stat", "r");
>         if (fp == NULL) {
>                 DEBUG("get_boottime: popen failed");
>         }
>         else {
>                 fgets(boottime, BOOTTIME_MAX_LEN, fp);
>                 DEBUG("get_boottime: Boottime is %s", boottime);
>                 status = pclose(fp);
>                 if (status == -1) {
>                         DEBUG("get_boottime: Could not close");
>                 }
>         }
>         return;
> }
You're kidding, aren't you? :-)

Why not read in the file line-by-line and check if the actual line
starts with 'btime'? (fopen, fgets, strncmp, fclose)

You are starting a new process and creating two pipes to read something
from a (text) file?

Perhaps Tauno's tip was more suitable... ;-)

Salut, Jörg