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#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
/**
* This is a simple program meant to be launched with flatpak-spawn --host to
* retrieve host information Flatpak'ed apps don't have access to. The original
* idea for this program came from
* https://github.com/gnunn1/tilix/blob/master/experimental/flatpak/tilix-flatpak-toolbox.c
*/
int die(int code, char *fmt, ...) __attribute__((format(printf, 2, 0)));
int die(int code, char *fmt, ...)
{
va_list list;
va_start(list, fmt);
vfprintf(stderr, fmt, list);
return code;
}
int main(int argc, const char *argv[])
{
if (argc < 2)
{
return die(1, "Not enough arguments.\n");
}
if (strcmp(argv[1], "tcgetpgrp") == 0)
{
// This is not needed
if (argc != 3)
{
return die(1, "Missing argument `fd` for tcgetpgrp.\n");
}
// This is 3 because we create an array of fds that will be passed to this
// program via a Flatpak DBus call, and the vte pty we need is in the 4th
// slot in that array.
pid_t pid = tcgetpgrp(3);
printf("%d\n", pid);
return 0;
}
else if (strcmp(argv[1], "stat") == 0)
{
if (argc < 3)
{
return die(1, "Missing argument 'pid' for getting euid.\n");
}
struct stat s;
if (stat(argv[2], &s) == -1)
{
printf("STAT FAILED FOR PID %s\n", argv[2]);
return -1;
}
printf("%d\n", s.st_uid);
return 0;
}
else
{
return die(1, "Unknown command '%s'.\n", argv[1]);
}
return 0;
}
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