Re: Reading /proc/stat btime from user space

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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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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

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Thread

Reading /proc/stat btime from user space SJC <jobhunts02@aol.com> - 2013-01-16 22:37 -0800
  Re: Reading /proc/stat btime from user space Joerg Schmitz-Linneweber <joerg@schmitz-linneweber.name> - 2013-01-17 09:12 +0100
    Re: Reading /proc/stat btime from user space Joerg Schmitz-Linneweber <joerg@schmitz-linneweber.name> - 2013-01-17 09:17 +0100
  Re: Reading /proc/stat btime from user space SJC <jobhunts02@aol.com> - 2013-01-17 10:02 -0800
    Re: Reading /proc/stat btime from user space Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-01-17 23:10 +0200
  Re: Reading /proc/stat btime from user space SJC <jobhunts02@aol.com> - 2013-01-17 14:20 -0800
    Re: Reading /proc/stat btime from user space Joerg Schmitz-Linneweber <joerg@schmitz-linneweber.name> - 2013-01-18 16:41 +0100

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