Comments on: Dump environment of a C program https://jeremy.visser.name/2009/10/29/dump-environment-of-a-c-program/ Sun, 05 Sep 2010 12:55:22 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Jeremy https://jeremy.visser.name/2009/10/29/dump-environment-of-a-c-program/comment-page-1/#comment-4684 Jeremy Thu, 29 Oct 2009 09:35:06 +0000 http://jeremy.visser.name/?p=1308#comment-4684 Cheers. :) Cheers. :)

]]> By: John Ferlito https://jeremy.visser.name/2009/10/29/dump-environment-of-a-c-program/comment-page-1/#comment-4683 John Ferlito Thu, 29 Oct 2009 09:15:27 +0000 http://jeremy.visser.name/?p=1308#comment-4683 You can also do <pre lang="C">#include <stdio.h> int main (int argc, char *argv[], char *envp[]) { int e = 0; while (envp[e] != NULL) { printf("%s\r\n", envp[e]); e++; } return 0; }</pre> which I think looks nicer than introducing a magic variable onto your stack :) You can also do

#include <stdio.h>
 
int main (int argc, char *argv[], char *envp[]) {
    int e = 0;
 
    while (envp[e] != NULL) {
        printf("%s\r\n", envp[e]);
        e++;
    }
 
    return 0;
}

which I think looks nicer than introducing a magic variable onto your stack :)

]]> By: Jeremy https://jeremy.visser.name/2009/10/29/dump-environment-of-a-c-program/comment-page-1/#comment-4682 Jeremy Thu, 29 Oct 2009 08:59:31 +0000 http://jeremy.visser.name/?p=1308#comment-4682 Uh heh heh. Actually my specific need was to write it out through syslog, and I couldn't be bothered figuring out how to connect the stdout of <code>env</code> to some <code>/dev/log</code> file handle. Not that I didn't have <code>env</code> available. (I can do it in Python with <a href="http://docs.python.org/library/subprocess.html" rel="nofollow"><code>subprocess</code></a>, but no idea with normal POSIX stuff.) Key words here: <em>quick 'n dirty</em>. :) Uh heh heh. Actually my specific need was to write it out through syslog, and I couldn’t be bothered figuring out how to connect the stdout of env to some /dev/log file handle. Not that I didn’t have env available.

(I can do it in Python with subprocess, but no idea with normal POSIX stuff.)

Key words here: quick ‘n dirty. :)

]]> By: TimC https://jeremy.visser.name/2009/10/29/dump-environment-of-a-c-program/comment-page-1/#comment-4681 TimC Thu, 29 Oct 2009 07:45:10 +0000 http://jeremy.visser.name/?p=1308#comment-4681 How often don't you have env, but you do have gcc and its libraries? How often don’t you have env, but you do have gcc and its libraries?

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