/**
Set up default values for various variables if not defined.
*/
static void env_set_defaults()
{
if (env_get_string(L"USER").missing())
{
struct passwd *pw = getpwuid(getuid());
if (pw->pw_name != NULL)
{
const wcstring wide_name = str2wcstring(pw->pw_name);
env_set(L"USER", wide_name.c_str(), ENV_GLOBAL);
}
}
if (env_get_string(L"HOME").missing())
{
const env_var_t unam = env_get_string(L"USER");
char *unam_narrow = wcs2str(unam.c_str());
struct passwd *pw = getpwnam(unam_narrow);
if (pw->pw_dir != NULL)
{
const wcstring dir = str2wcstring(pw->pw_dir);
env_set(L"HOME", dir.c_str(), ENV_GLOBAL);
}
free(unam_narrow);
}
env_set_pwd();
}
/**
Set up default values for various variables if not defined.
*/
static void env_set_defaults()
{
if( env_get_string(L"USER").missing() )
{
struct passwd *pw = getpwuid( getuid());
wchar_t *unam = str2wcs( pw->pw_name );
env_set( L"USER", unam, ENV_GLOBAL );
free( unam );
}
if( env_get_string(L"HOME").missing() )
{
const env_var_t unam = env_get_string( L"USER" );
char *unam_narrow = wcs2str( unam.c_str() );
struct passwd *pw = getpwnam( unam_narrow );
wchar_t *dir = str2wcs( pw->pw_dir );
env_set( L"HOME", dir, ENV_GLOBAL );
free( dir );
free( unam_narrow );
}
env_set_pwd();
}
void env_init(const struct config_paths_t *paths /* or NULL */)
{
/*
env_read_only variables can not be altered directly by the user
*/
const wchar_t * const ro_keys[] =
{
L"status",
L"history",
L"version",
L"_",
L"LINES",
L"COLUMNS",
L"PWD",
//L"SHLVL", // will be inserted a bit lower down
L"FISH_VERSION",
};
for (size_t i=0; i < sizeof ro_keys / sizeof *ro_keys; i++)
{
env_read_only.insert(ro_keys[i]);
}
/*
Names of all dynamically calculated variables
*/
env_electric.insert(L"history");
env_electric.insert(L"status");
env_electric.insert(L"umask");
env_electric.insert(L"COLUMNS");
env_electric.insert(L"LINES");
top = new env_node_t;
global_env = top;
global = &top->env;
/*
Now the environemnt variable handling is set up, the next step
is to insert valid data
*/
/*
Import environment variables
*/
for (char **p = (environ ? environ : __environ); p && *p; p++)
{
const wcstring key_and_val = str2wcstring(*p); //like foo=bar
size_t eql = key_and_val.find(L'=');
if (eql == wcstring::npos)
{
// no equals found
if (is_read_only(key_and_val) || is_electric(key_and_val)) continue;
env_set(key_and_val, L"", ENV_EXPORT | ENV_GLOBAL);
}
else
{
wcstring key = key_and_val.substr(0, eql);
if (is_read_only(key) || is_electric(key)) continue;
wcstring val = key_and_val.substr(eql + 1);
if (variable_is_colon_delimited_array(key))
{
std::replace(val.begin(), val.end(), L':', ARRAY_SEP);
}
env_set(key, val.c_str(), ENV_EXPORT | ENV_GLOBAL);
}
}
/* Set the given paths in the environment, if we have any */
if (paths != NULL)
{
env_set(FISH_DATADIR_VAR, paths->data.c_str(), ENV_GLOBAL);
env_set(FISH_SYSCONFDIR_VAR, paths->sysconf.c_str(), ENV_GLOBAL);
env_set(FISH_HELPDIR_VAR, paths->doc.c_str(), ENV_GLOBAL);
env_set(FISH_BIN_DIR, paths->bin.c_str(), ENV_GLOBAL);
}
/*
Set up the PATH variable
*/
setup_path();
/*
Set up the USER variable
*/
if (env_get_string(L"USER").missing_or_empty())
{
const struct passwd *pw = getpwuid(getuid());
if (pw && pw->pw_name)
{
const wcstring uname = str2wcstring(pw->pw_name);
env_set(L"USER", uname.c_str(), ENV_GLOBAL | ENV_EXPORT);
}
}
/*
Set up the version variables
*/
wcstring version = str2wcstring(get_fish_version());
env_set(L"version", version.c_str(), ENV_GLOBAL);
env_set(L"FISH_VERSION", version.c_str(), ENV_GLOBAL);
/*
Set up SHLVL variable
*/
const env_var_t shlvl_str = env_get_string(L"SHLVL");
wcstring nshlvl_str = L"1";
if (! shlvl_str.missing())
{
wchar_t *end;
long shlvl_i = wcstol(shlvl_str.c_str(), &end, 10);
while (iswspace(*end)) ++end; /* skip trailing whitespace */
if (shlvl_i >= 0 && *end == '\0')
{
nshlvl_str = to_string<long>(shlvl_i + 1);
}
}
env_set(L"SHLVL", nshlvl_str.c_str(), ENV_GLOBAL | ENV_EXPORT);
env_read_only.insert(L"SHLVL");
/* Set up the HOME variable */
if (env_get_string(L"HOME").missing_or_empty())
{
const env_var_t unam = env_get_string(L"USER");
char *unam_narrow = wcs2str(unam.c_str());
struct passwd *pw = getpwnam(unam_narrow);
if (pw->pw_dir != NULL)
{
const wcstring dir = str2wcstring(pw->pw_dir);
env_set(L"HOME", dir.c_str(), ENV_GLOBAL | ENV_EXPORT);
}
free(unam_narrow);
}
/* Set PWD */
env_set_pwd();
/* Set up universal variables. The empty string means to use the deafult path. */
assert(s_universal_variables == NULL);
s_universal_variables = new env_universal_t(L"");
s_universal_variables->load();
/* Set g_log_forks */
env_var_t log_forks = env_get_string(L"fish_log_forks");
g_log_forks = ! log_forks.missing_or_empty() && from_string<bool>(log_forks);
/* Set g_use_posix_spawn. Default to true. */
env_var_t use_posix_spawn = env_get_string(L"fish_use_posix_spawn");
g_use_posix_spawn = (use_posix_spawn.missing_or_empty() ? true : from_string<bool>(use_posix_spawn));
/* Set fish_bind_mode to "default" */
env_set(FISH_BIND_MODE_VAR, DEFAULT_BIND_MODE, ENV_GLOBAL);
/*
Now that the global scope is fully initialized, add a toplevel local
scope. This same local scope will persist throughout the lifetime of the
fish process, and it will ensure that `set -l` commands run at the
command-line don't affect the global scope.
*/
env_push(false);
}
/// The cd builtin. Changes the current directory to the one specified or to $HOME if none is
/// specified. The directory can be relative to any directory in the CDPATH variable.
/// The cd builtin. Changes the current directory to the one specified or to $HOME if none is
/// specified. The directory can be relative to any directory in the CDPATH variable.
int builtin_cd(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
const wchar_t *cmd = argv[0];
int argc = builtin_count_args(argv);
help_only_cmd_opts_t opts;
int optind;
int retval = parse_help_only_cmd_opts(opts, &optind, argc, argv, parser, streams);
if (retval != STATUS_CMD_OK) return retval;
if (opts.print_help) {
builtin_print_help(parser, streams, cmd, streams.out);
return STATUS_CMD_OK;
}
env_var_t dir_in;
wcstring dir;
if (argv[optind]) {
dir_in = env_var_t(L"", argv[optind]); // unamed var
} else {
auto maybe_dir_in = env_get(L"HOME");
if (maybe_dir_in.missing_or_empty()) {
streams.err.append_format(_(L"%ls: Could not find home directory\n"), cmd);
return STATUS_CMD_ERROR;
}
dir_in = std::move(*maybe_dir_in);
}
if (!path_get_cdpath(dir_in, &dir)) {
if (errno == ENOTDIR) {
streams.err.append_format(_(L"%ls: '%ls' is not a directory\n"), cmd,
dir_in.as_string().c_str());
} else if (errno == ENOENT) {
streams.err.append_format(_(L"%ls: The directory '%ls' does not exist\n"), cmd,
dir_in.as_string().c_str());
} else if (errno == EROTTEN) {
streams.err.append_format(_(L"%ls: '%ls' is a rotten symlink\n"), cmd,
dir_in.as_string().c_str());
} else {
streams.err.append_format(_(L"%ls: Unknown error trying to locate directory '%ls'\n"),
cmd, dir_in.as_string().c_str());
}
if (!shell_is_interactive()) streams.err.append(parser.current_line());
return STATUS_CMD_ERROR;
}
if (wchdir(dir) != 0) {
struct stat buffer;
int status;
status = wstat(dir, &buffer);
if (!status && S_ISDIR(buffer.st_mode)) {
streams.err.append_format(_(L"%ls: Permission denied: '%ls'\n"), cmd, dir.c_str());
} else {
streams.err.append_format(_(L"%ls: '%ls' is not a directory\n"), cmd, dir.c_str());
}
if (!shell_is_interactive()) {
streams.err.append(parser.current_line());
}
return STATUS_CMD_ERROR;
}
if (!env_set_pwd()) {
streams.err.append_format(_(L"%ls: Could not set PWD variable\n"), cmd);
return STATUS_CMD_ERROR;
}
return STATUS_CMD_OK;
}
