proxychains-ng/src/main.c

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/***************************************************************************
main.c - description
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begin : Tue May 14 2002
copyright : netcreature (C) 2002
email : netcreature@users.sourceforge.net
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***************************************************************************/
/* GPL */
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
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#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
extern char *optarg;
extern int optind, opterr, optopt;
#define PROXYCHAINS_CONF_FILE "proxychains.conf"
static void usage(char** argv) {
printf("\nUsage: %s [h] [f] config_file program_name [arguments]\n"
"\t for example : proxychains telnet somehost.com\n"
"More help in README file\n", argv[0]);
}
int main(int argc, char *argv[]) {
char *path = NULL;
char buf[256];
char pbuf[256];
int opt;
while ((opt = getopt(argc, argv, "fh:")) != -1) {
switch (opt) {
case 'h':
usage(argv);
break;
case 'f':
path = (char *)optarg;
break;
default: /* '?' */
usage(argv);
exit(EXIT_FAILURE);
}
}
if(!path) {
if(!(path = getenv("PROXYCHAINS_CONF_FILE")))
path = getcwd(buf, sizeof(buf));
else if(access(path, R_OK) != -1) goto have;
if(!path ||
!snprintf(pbuf, sizeof(pbuf), "%s/%s", path, PROXYCHAINS_CONF_FILE) ||
access(pbuf, R_OK) == -1
)
path = "/etc/proxychains.conf";
else
path = pbuf;
}
if(access(path, R_OK) == -1) {
perror("couldnt find configuration file");
return 1;
}
have:
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printf("using config file: %s\n", path);
//printf("argv = %s\n", argv[1]);
/* Set PROXYCHAINS_CONF_FILE to get proxychains lib to use new config file. */
setenv("PROXYCHAINS_CONF_FILE", path, 1);
snprintf(buf, sizeof(buf), "LD_PRELOAD=%s/libproxychains.so", LIB_DIR);
putenv(buf);
execvp(argv[1], &argv[1]);
perror("proxychains can't load process....");
return EXIT_SUCCESS;
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}