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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-19 16:29:09 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-19 16:29:09 +0200 |
| commit | ef8985c688e9e5e9e8bc29f38d1f05f543c30acb (patch) | |
| tree | edba3e2bc66f39331b255d3a25d9b6342017b8ce /shell/hush.c | |
| parent | 0c3601936915d3d625683388c62c561de96a47da (diff) | |
| download | busybox-ef8985c688e9e5e9e8bc29f38d1f05f543c30acb.tar.gz | |
hush: implement $-, set default PATH if it is not set on startup
function old new delta
expand_one_var 2311 2362 +51
hush_main 1075 1104 +29
parse_dollar 790 791 +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 81/0) Total: 81 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/shell/hush.c b/shell/hush.c index 2b9abbdfd..9dd893aa6 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -466,9 +466,9 @@ #define JOB_STATUS_FORMAT "[%u] %-22s %.40s\n" -#define _SPECIAL_VARS_STR "_*@$!?#" -#define SPECIAL_VARS_STR ("_*@$!?#" + 1) -#define NUMERIC_SPECVARS_STR ("_*@$!?#" + 3) +#define _SPECIAL_VARS_STR "_*@$!?#-" +#define SPECIAL_VARS_STR ("_*@$!?#-" + 1) +#define NUMERIC_SPECVARS_STR ("_*@$!?#-" + 3) #if BASH_PATTERN_SUBST /* Support / and // replace ops */ /* Note that // is stored as \ in "encoded" string representation */ @@ -1008,6 +1008,7 @@ struct globals { int debug_indent; #endif struct sigaction sa; + char optstring_buf[sizeof("eix")]; #if BASH_EPOCH_VARS char epoch_buf[sizeof("%lu.nnnnnn") + sizeof(long)*3]; #endif @@ -4888,6 +4889,7 @@ static int parse_dollar(o_string *as_string, case '#': /* number of args */ case '*': /* args */ case '@': /* args */ + case '-': /* $- option flags set by set builtin or shell options (-i etc) */ goto make_one_char_var; case '{': { char len_single_ch; @@ -5062,11 +5064,10 @@ static int parse_dollar(o_string *as_string, case '_': goto make_var; #if 0 - /* TODO: $_ and $-: */ + /* TODO: $_: */ /* $_ Shell or shell script name; or last argument of last command * (if last command wasn't a pipe; if it was, bash sets $_ to ""); * but in command's env, set to full pathname used to invoke it */ - /* $- Option flags set by set builtin or shell options (-i etc) */ ch = i_getch(input); nommu_addchr(as_string, ch); ch = i_peek_and_eat_bkslash_nl(input); @@ -6397,6 +6398,23 @@ static NOINLINE int expand_one_var(o_string *output, int n, case '#': /* argc */ val = utoa(G.global_argc ? G.global_argc-1 : 0); break; + case '-': { /* active options */ + /* Check set_mode() to see what option chars we support */ + char *cp; + val = cp = G.optstring_buf; + if (G.o_opt[OPT_O_ERREXIT]) + *cp++ = 'e'; + if (G_interactive_fd) + *cp++ = 'i'; + if (G_x_mode) + *cp++ = 'x'; + /* If G.o_opt[OPT_O_NOEXEC] is true, + * commands read but are not executed, + * so $- can not execute too, 'n' is never seen in $-. + */ + *cp = '\0'; + break; + } default: val = get_local_var_value(var); } @@ -9899,6 +9917,9 @@ int hush_main(int argc, char **argv) /* IFS is not inherited from the parent environment */ set_local_var_from_halves("IFS", defifs); + if (!get_local_var_value("PATH")) + set_local_var_from_halves("PATH", bb_default_root_path); + /* PS1/PS2 are set later, if we determine that we are interactive */ /* bash also exports SHLVL and _, |