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use get_local_var_value() rather than getenv() when working with PS1/PS2/HOME, respect the PS2 env var, and make sure that the prompt changes whenever PS1/PS2 changes so we dont have to re-exec the shell to get a changed prompt

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This commit is contained in:
Mike Frysinger 2009-04-24 06:26:18 +00:00
parent eb4e5ecc32
commit 67c1c7b456
1 changed files with 18 additions and 8 deletions
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26
shell/hush.c
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@ -795,6 +795,13 @@ static void syntax_error_unexpected_ch(unsigned lineno, char ch)
#endif
#if ENABLE_HUSH_INTERACTIVE
static void cmdedit_update_prompt(void);
#else
# define cmdedit_update_prompt()
#endif
/* Utility functions
*/
static int glob_needed(const char *s)
@ -1332,6 +1339,8 @@ static int set_local_var(char *str, int flg_export, int flg_read_only)
exp:
if (flg_export == 1)
cur->flg_export = 1;
if (name_len == 4 && cur->varstr[0] == 'P' && cur->varstr[1] == 'S')
cmdedit_update_prompt();
if (cur->flg_export) {
if (flg_export == -1) {
cur->flg_export = 0;
@ -1365,6 +1374,8 @@ static int unset_local_var(const char *name)
prev->next = cur->next;
debug_printf_env("%s: unsetenv '%s'\n", __func__, cur->varstr);
bb_unsetenv(cur->varstr);
if (name_len == 3 && cur->varstr[0] == 'P' && cur->varstr[1] == 'S')
cmdedit_update_prompt();
if (!cur->max_len)
free(cur->varstr);
free(cur);
@ -1421,14 +1432,17 @@ static int static_peek(struct in_str *i)
#if ENABLE_HUSH_INTERACTIVE
static void cmdedit_set_initial_prompt(void)
static void cmdedit_update_prompt(void)
{
if (ENABLE_FEATURE_EDITING_FANCY_PROMPT) {
G.PS1 = getenv("PS1");
G.PS1 = get_local_var_value("PS1");
if (G.PS1 == NULL)
G.PS1 = "\\w \\$ ";
G.PS2 = get_local_var_value("PS2");
} else
G.PS1 = NULL;
if (G.PS2 == NULL)
G.PS2 = "> ";
}
static const char* setup_prompt_string(int promptmode)
@ -6002,11 +6016,7 @@ int hush_main(int argc, char **argv)
G.global_argv = argv;
/* Initialize some more globals to non-zero values */
set_cwd();
#if ENABLE_HUSH_INTERACTIVE
if (ENABLE_FEATURE_EDITING)
cmdedit_set_initial_prompt();
G.PS2 = "> ";
#endif
cmdedit_update_prompt();
if (setjmp(die_jmp)) {
/* xfunc has failed! die die die */
@ -6334,7 +6344,7 @@ static int builtin_cd(char **argv)
* bash says "bash: cd: HOME not set" and does nothing
* (exitcode 1)
*/
newdir = getenv("HOME") ? : "/";
newdir = get_local_var_value("HOME") ? : "/";
}
if (chdir(newdir)) {
/* Mimic bash message exactly */