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#include <sys/types.h>
#if !defined(__OpenBSD__)
#define __USE_GNU
#define _GNU_SOURCE
#endif
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <err.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include "libglouglou.h"
/*
* Various utils
*/
void *
xmalloc(size_t size)
{
void *data;
data = malloc(size);
if (!data)
err(1, "could not malloc %d", (int)size);
return data;
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *data;
data = calloc(nmemb, size);
if (!data)
err(1, "could not calloc %d", (int)size);
return data;
}
void
fd_nonblock(int fd)
{
int flags = fcntl(fd, F_GETFL, 0);
int rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
if (rc == -1)
err(1, "failed to set fd %i non-blocking", fd);
}
void
addrcpy(struct sockaddr_in *dst, struct sockaddr_in *src)
{
dst->sin_addr.s_addr = src->sin_addr.s_addr;
dst->sin_port = src->sin_port;
dst->sin_family = src->sin_family;
}
int
addrcmp(struct sockaddr_in *a, struct sockaddr_in *b)
{
if (a->sin_addr.s_addr != b->sin_addr.s_addr)
return -1;
if (a->sin_port != b->sin_port)
return -2;
if (a->sin_family != b->sin_family)
return -3;
return 0;
}
void
droppriv(char *user, int do_chroot, char *chroot_path)
{
struct passwd *pw;
pw = getpwnam(user);
if (!pw)
err(1, "unknown user %s", user);
if (do_chroot) {
if (!chroot_path)
chroot_path = pw->pw_dir;
if (chroot(chroot_path) != 0)
err(1, "unable to chroot");
}
if (chdir("/") != 0)
err(1, "unable to chdir");
if (setgroups(1, &pw->pw_gid) == -1)
err(1, "setgroups() failed");
if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1)
err(1, "setresgid failed");
if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
err(1, "setresuid() failed");
endpwent();
}
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