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/*
* bitmask-launcher.c
*
* part of the bitmask bundle.
* execute main entrypoint in a child folder inside the bundle.
*
* (c) LEAP Encryption Access Project, 2016-2018.
* License: GPL.
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <libgen.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#define MAXBUFFSIZE 1024
char* const lib = "/lib";
char* const entrypoint = "app";
char* const linkname = "/proc/self/exe";
int main(int argc, char *argv[])
{
char buf[MAXBUFFSIZE];
char pth[MAXBUFFSIZE];
char *dirc, *dname;
const size_t bufsize = MAXBUFFSIZE + 1;
argv[0] = entrypoint;
buf[0] = 0;
pth[0] = 0;
readlink(linkname, buf, bufsize - 1);
dirc = strdup(buf);
dname = dirname(dirc);
strncat(pth, dname, strlen(dname));
strncat(pth, lib, strlen(lib));
if (chdir(pth) < 0)
{
fprintf(stderr, "error: %s\n", strerror(errno));
}
execv(entrypoint, argv);
}
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