static void
pseudo_file_close(int *fd, FILE **fp) {
if (!fp || !fd) {
pseudo_diag("pseudo_file_close: needs valid pointers.\n");
return;
}
pseudo_antimagic();
if (*fp) {
#if PSEUDO_PORT_DARWIN
if (*fp == pseudo_host_etc_passwd_file) {
endpwent();
} else if (*fp != pseudo_host_etc_group_file) {
endgrent();
} else {
fclose(*fp);
}
#else
fclose(*fp);
#endif
*fd = -1;
*fp = 0;
}
#if PSEUDO_PORT_DARWIN
if (*fd == pseudo_host_etc_passwd_fd ||
*fd == pseudo_host_etc_group_fd) {
*fd = -1;
}
#endif
/* this should be impossible */
if (*fd >= 0) {
close(*fd);
*fd = -1;
}
pseudo_magic();
}
static FILE *
pseudo_file_open(char *name, int *fd, FILE **fp) {
if (!fp || !fd || !name) {
pseudo_diag("pseudo_file_open: needs valid pointers.\n");
return NULL;
}
pseudo_file_close(fd, fp);
pseudo_antimagic();
*fd = PSEUDO_ETC_FILE(name, NULL, O_RDONLY);
#if PSEUDO_PORT_DARWIN
if (*fd == pseudo_host_etc_passwd_fd) {
*fp = pseudo_host_etc_passwd_file;
setpwent();
} else if (*fd == pseudo_host_etc_group_fd) {
*fp = pseudo_host_etc_group_file;
setgrent();
}
#endif
if (*fd >= 0) {
*fd = pseudo_fd(*fd, MOVE_FD);
*fp = fdopen(*fd, "r");
if (!*fp) {
close(*fd);
*fd = -1;
}
}
pseudo_magic();
return *fp;
}
int
clone(int (*fn)(void *), void *child_stack, int flags, void *arg, ...) {
sigset_t saved;
va_list ap;
pid_t *pid;
struct user_desc *tls;
pid_t *ctid;
int rc = -1;
if (!pseudo_check_wrappers() || !real_clone) {
/* rc was initialized to the "failure" value */
pseudo_enosys("clone");
return rc;
}
va_start(ap, arg);
pid = va_arg(ap, pid_t *);
tls = va_arg(ap, struct user_desc *);
ctid = va_arg(ap, pid_t *);
va_end(ap);
pseudo_debug(PDBGF_WRAPPER, "called: clone\n");
pseudo_sigblock(&saved);
if (pseudo_getlock()) {
errno = EBUSY;
sigprocmask(SIG_SETMASK, &saved, NULL);
return -1;
}
int save_errno;
int save_disabled = pseudo_disabled;
#include "guts/clone.c"
if (save_disabled != pseudo_disabled) {
if (pseudo_disabled) {
pseudo_disabled = 0;
pseudo_magic();
} else {
pseudo_disabled = 1;
pseudo_antimagic();
}
}
save_errno = errno;
pseudo_droplock();
sigprocmask(SIG_SETMASK, &saved, NULL);
pseudo_debug(PDBGF_WRAPPER, "completed: clone\n");
errno = save_errno;
return rc;
}
char *
pseudo_root_path(const char *func, int line, int dirfd, const char *path, int leave_last) {
char *rc;
pseudo_antimagic();
rc = base_path(dirfd, path, leave_last);
pseudo_magic();
if (!rc) {
pseudo_diag("couldn't allocate absolute path for '%s'.\n",
path);
}
pseudo_debug(3, "root_path [%s, %d]: '%s' from '%s'\n",
func, line,
rc ? rc : "<nil>",
path ? path : "<nil>");
return rc;
}
void
pseudo_init_client(void) {
char *env;
pseudo_antimagic();
pseudo_new_pid();
if (connect_fd != -1) {
close(connect_fd);
connect_fd = -1;
}
/* in child processes, PSEUDO_DISABLED may have become set to
* some truthy value, in which case we'd disable pseudo,
* or it may have gone away, in which case we'd enable
* pseudo (and cause it to reinit the defaults).
*/
env = getenv("PSEUDO_DISABLED");
if (!env) {
env = pseudo_get_value("PSEUDO_DISABLED");
}
if (env) {
int actually_disabled = 1;
switch (*env) {
case '0':
case 'f':
case 'F':
case 'n':
case 'N':
actually_disabled = 0;
break;
case 's':
case 'S':
actually_disabled = 0;
pseudo_local_only = 1;
break;
}
if (actually_disabled) {
if (!pseudo_disabled) {
pseudo_antimagic();
pseudo_disabled = 1;
}
pseudo_set_value("PSEUDO_DISABLED", "1");
} else {
if (pseudo_disabled) {
pseudo_magic();
pseudo_disabled = 0;
pseudo_inited = 0; /* Re-read the initial values! */
}
pseudo_set_value("PSEUDO_DISABLED", "0");
}
} else {
pseudo_set_value("PSEUDO_DISABLED", "0");
}
/* Setup global items needed for pseudo to function... */
if (!pseudo_inited) {
/* Ensure that all of the values are reset */
server_pid = 0;
pseudo_prefix_dir_fd = -1;
pseudo_localstate_dir_fd = -1;
pseudo_pwd_fd = -1;
pseudo_pwd_lck_fd = -1;
pseudo_pwd_lck_name = NULL;
pseudo_pwd = NULL;
pseudo_grp_fd = -1;
pseudo_grp = NULL;
pseudo_cwd = NULL;
pseudo_cwd_len = 0;
pseudo_chroot = NULL;
pseudo_passwd = NULL;
pseudo_chroot_len = 0;
pseudo_cwd_rel = NULL;
pseudo_nosymlinkexp = 0;
}
if (!pseudo_disabled && !pseudo_inited) {
char *pseudo_path = 0;
pseudo_path = pseudo_prefix_path(NULL);
if (pseudo_prefix_dir_fd == -1) {
if (pseudo_path) {
pseudo_prefix_dir_fd = open(pseudo_path, O_RDONLY);
/* directory is missing? */
if (pseudo_prefix_dir_fd == -1 && errno == ENOENT) {
pseudo_debug(1, "prefix directory doesn't exist, trying to create\n");
mkdir_p(pseudo_path);
pseudo_prefix_dir_fd = open(pseudo_path, O_RDONLY);
}
pseudo_prefix_dir_fd = pseudo_fd(pseudo_prefix_dir_fd, MOVE_FD);
} else {
pseudo_diag("No prefix available to to find server.\n");
exit(1);
}
if (pseudo_prefix_dir_fd == -1) {
pseudo_diag("Can't open prefix path (%s) for server: %s\n",
pseudo_path,
strerror(errno));
exit(1);
}
}
free(pseudo_path);
pseudo_path = pseudo_localstatedir_path(NULL);
if (pseudo_localstate_dir_fd == -1) {
if (pseudo_path) {
pseudo_localstate_dir_fd = open(pseudo_path, O_RDONLY);
/* directory is missing? */
if (pseudo_localstate_dir_fd == -1 && errno == ENOENT) {
pseudo_debug(1, "local state directory doesn't exist, trying to create\n");
mkdir_p(pseudo_path);
pseudo_localstate_dir_fd = open(pseudo_path, O_RDONLY);
}
pseudo_localstate_dir_fd = pseudo_fd(pseudo_localstate_dir_fd, MOVE_FD);
} else {
pseudo_diag("No prefix available to to find server.\n");
exit(1);
}
if (pseudo_localstate_dir_fd == -1) {
pseudo_diag("Can't open local state path (%s) for server: %s\n",
pseudo_path,
strerror(errno));
exit(1);
}
}
free(pseudo_path);
env = pseudo_get_value("PSEUDO_NOSYMLINKEXP");
if (env) {
char *endptr;
/* if the environment variable is not an empty string,
* parse it; "0" means turn NOSYMLINKEXP off, "1" means
* turn it on (disabling the feature). An empty string
* or something we can't parse means to set the flag; this
* is a safe default because if you didn't want the flag
* set, you normally wouldn't set the environment variable
* at all.
*/
if (*env) {
pseudo_nosymlinkexp = strtol(env, &endptr, 10);
if (*endptr)
pseudo_nosymlinkexp = 1;
} else {
pseudo_nosymlinkexp = 1;
}
} else {
pseudo_nosymlinkexp = 0;
}
free(env);
env = pseudo_get_value("PSEUDO_UIDS");
if (env)
sscanf(env, "%d,%d,%d,%d",
&pseudo_ruid, &pseudo_euid,
&pseudo_suid, &pseudo_fuid);
free(env);
env = pseudo_get_value("PSEUDO_GIDS");
if (env)
sscanf(env, "%d,%d,%d,%d",
&pseudo_rgid, &pseudo_egid,
&pseudo_sgid, &pseudo_fuid);
free(env);
env = pseudo_get_value("PSEUDO_CHROOT");
if (env) {
pseudo_chroot = strdup(env);
if (pseudo_chroot) {
pseudo_chroot_len = strlen(pseudo_chroot);
} else {
pseudo_diag("can't store chroot path (%s)\n", env);
}
}
free(env);
env = pseudo_get_value("PSEUDO_PASSWD");
if (env) {
pseudo_passwd = strdup(env);
}
free(env);
pseudo_inited = 1;
}
if (!pseudo_disabled)
pseudo_client_getcwd();
pseudo_magic();
}
