# define PIPE_BUF 4096 /* amount of buffering in a pipe */
#endif
-/* Not every libc has sighandler_t. Fix it */
-typedef void (*hush_sighandler_t)(int);
-#define sighandler_t hush_sighandler_t
-
//config:config HUSH
//config: bool "hush"
//config: default y
# define ENABLE_FEATURE_EDITING 0
# undef ENABLE_FEATURE_EDITING_FANCY_PROMPT
# define ENABLE_FEATURE_EDITING_FANCY_PROMPT 0
+# undef ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+# define ENABLE_FEATURE_EDITING_SAVE_ON_EXIT 0
#endif
/* Do we support ANY keywords? */
/* Used for initialization: o_string foo = NULL_O_STRING; */
#define NULL_O_STRING { NULL }
+#ifndef debug_printf_parse
+static const char *const assignment_flag[] = {
+ "MAYBE_ASSIGNMENT",
+ "DEFINITELY_ASSIGNMENT",
+ "NOT_ASSIGNMENT",
+ "WORD_IS_KEYWORD",
+};
+#endif
+
typedef struct in_str {
const char *p;
/* eof_flag=1: last char in ->p is really an EOF */
struct command {
pid_t pid; /* 0 if exited */
int assignment_cnt; /* how many argv[i] are assignments? */
- smallint is_stopped; /* is the command currently running? */
smallint cmd_type; /* CMD_xxx */
#define CMD_NORMAL 0
#define CMD_SUBSHELL 1
unsigned special_sig_mask;
#if ENABLE_HUSH_JOB
unsigned fatal_sig_mask;
-#define G_fatal_sig_mask G.fatal_sig_mask
+# define G_fatal_sig_mask G.fatal_sig_mask
#else
-#define G_fatal_sig_mask 0
+# define G_fatal_sig_mask 0
#endif
char **traps; /* char *traps[NSIG] */
sigset_t pending_set;
unsigned long memleak_value;
int debug_indent;
#endif
+ struct sigaction sa;
char user_input_buf[ENABLE_FEATURE_EDITING ? CONFIG_FEATURE_EDITING_MAX_LEN : 2];
};
#define G (*ptr_to_globals)
* is global, thus "G." prefix is a useful hint */
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ /* memset(&G.sa, 0, sizeof(G.sa)); */ \
+ sigfillset(&G.sa.sa_mask); \
+ G.sa.sa_flags = SA_RESTART; \
} while (0)
#if ENABLE_HUSH_HELP
static int builtin_help(char **argv) FAST_FUNC;
#endif
+#if MAX_HISTORY && ENABLE_FEATURE_EDITING
+static int builtin_history(char **argv) FAST_FUNC;
+#endif
#if ENABLE_HUSH_LOCAL
static int builtin_local(char **argv) FAST_FUNC;
#endif
#if ENABLE_HUSH_HELP
BLTIN("help" , builtin_help , NULL),
#endif
+#if MAX_HISTORY && ENABLE_FEATURE_EDITING
+ BLTIN("history" , builtin_history , "Show command history"),
+#endif
#if ENABLE_HUSH_JOB
BLTIN("jobs" , builtin_jobs , "List jobs"),
#endif
#endif
}
+static sighandler_t install_sighandler(int sig, sighandler_t handler)
+{
+ struct sigaction old_sa;
+
+ /* We could use signal() to install handlers... almost:
+ * except that we need to mask ALL signals while handlers run.
+ * I saw signal nesting in strace, race window isn't small.
+ * SA_RESTART is also needed, but in Linux, signal()
+ * sets SA_RESTART too.
+ */
+ /* memset(&G.sa, 0, sizeof(G.sa)); - already done */
+ /* sigfillset(&G.sa.sa_mask); - already done */
+ /* G.sa.sa_flags = SA_RESTART; - already done */
+ G.sa.sa_handler = handler;
+ sigaction(sig, &G.sa, &old_sa);
+ return old_sa.sa_handler;
+}
+
#if ENABLE_HUSH_JOB
/* After [v]fork, in child: do not restore tty pgrp on xfunc death */
static void sigexit(int sig) NORETURN;
static void sigexit(int sig)
{
- /* Disable all signals: job control, SIGPIPE, etc. */
- sigprocmask_allsigs(SIG_BLOCK);
-
/* Careful: we can end up here after [v]fork. Do not restore
* tty pgrp then, only top-level shell process does that */
- if (G_saved_tty_pgrp && getpid() == G.root_pid)
+ if (G_saved_tty_pgrp && getpid() == G.root_pid) {
+ /* Disable all signals: job control, SIGPIPE, etc.
+ * Mostly paranoid measure, to prevent infinite SIGTTOU.
+ */
+ sigprocmask_allsigs(SIG_BLOCK);
tcsetpgrp(G_interactive_fd, G_saved_tty_pgrp);
+ }
/* Not a signal, just exit */
if (sig <= 0)
unsigned sigmask = (1 << sig);
#if ENABLE_HUSH_JOB
- /* sig is fatal? */
+ /* is sig fatal? */
if (G_fatal_sig_mask & sigmask)
handler = sigexit;
+ else
#endif
/* sig has special handling? */
- else if (G.special_sig_mask & sigmask) {
+ if (G.special_sig_mask & sigmask) {
handler = record_pending_signo;
/* TTIN/TTOU/TSTP can't be set to record_pending_signo
* in order to ignore them: they will be raised
static void hush_exit(int exitcode) NORETURN;
static void hush_exit(int exitcode)
{
+#if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+ save_history(G.line_input_state);
+#endif
+
fflush_all();
if (G.exiting <= 0 && G.traps && G.traps[0] && G.traps[0][0]) {
char *argv[3];
* _during_ shell execution, not only if it was set when
* shell was started. Therefore, re-check LANG every time:
*/
- reinit_unicode(get_local_var_value("LANG"));
+ const char *s = get_local_var_value("LC_ALL");
+ if (!s) s = get_local_var_value("LC_CTYPE");
+ if (!s) s = get_local_var_value("LANG");
+ reinit_unicode(s);
G.flag_SIGINT = 0;
/* buglet: SIGINT will not make new prompt to appear _at once_,
ordinary_cnt = len;
o_addblock(o, str, ordinary_cnt);
if (ordinary_cnt == len)
- return;
+ return; /* NUL is already added by o_addblock */
str += ordinary_cnt;
len -= ordinary_cnt + 1; /* we are processing + 1 char below */
o_grow_by(o, sz);
o->data[o->length] = ch;
o->length++;
- o->data[o->length] = '\0';
}
+ o->data[o->length] = '\0';
}
static void o_addQblock(o_string *o, const char *str, int len)
n, string_len, string_start);
o->has_empty_slot = 0;
}
+ o->has_quoted_part = 0;
list[n] = (char*)(uintptr_t)string_len;
return n + 1;
}
*/
static const struct reserved_combo reserved_list[] = {
# if ENABLE_HUSH_IF
- { "!", RES_NONE, NOT_ASSIGNMENT , 0 },
- { "if", RES_IF, WORD_IS_KEYWORD, FLAG_THEN | FLAG_START },
- { "then", RES_THEN, WORD_IS_KEYWORD, FLAG_ELIF | FLAG_ELSE | FLAG_FI },
- { "elif", RES_ELIF, WORD_IS_KEYWORD, FLAG_THEN },
- { "else", RES_ELSE, WORD_IS_KEYWORD, FLAG_FI },
- { "fi", RES_FI, NOT_ASSIGNMENT , FLAG_END },
+ { "!", RES_NONE, NOT_ASSIGNMENT , 0 },
+ { "if", RES_IF, MAYBE_ASSIGNMENT, FLAG_THEN | FLAG_START },
+ { "then", RES_THEN, MAYBE_ASSIGNMENT, FLAG_ELIF | FLAG_ELSE | FLAG_FI },
+ { "elif", RES_ELIF, MAYBE_ASSIGNMENT, FLAG_THEN },
+ { "else", RES_ELSE, MAYBE_ASSIGNMENT, FLAG_FI },
+ { "fi", RES_FI, NOT_ASSIGNMENT , FLAG_END },
# endif
# if ENABLE_HUSH_LOOPS
- { "for", RES_FOR, NOT_ASSIGNMENT , FLAG_IN | FLAG_DO | FLAG_START },
- { "while", RES_WHILE, WORD_IS_KEYWORD, FLAG_DO | FLAG_START },
- { "until", RES_UNTIL, WORD_IS_KEYWORD, FLAG_DO | FLAG_START },
- { "in", RES_IN, NOT_ASSIGNMENT , FLAG_DO },
- { "do", RES_DO, WORD_IS_KEYWORD, FLAG_DONE },
- { "done", RES_DONE, NOT_ASSIGNMENT , FLAG_END },
+ { "for", RES_FOR, NOT_ASSIGNMENT , FLAG_IN | FLAG_DO | FLAG_START },
+ { "while", RES_WHILE, MAYBE_ASSIGNMENT, FLAG_DO | FLAG_START },
+ { "until", RES_UNTIL, MAYBE_ASSIGNMENT, FLAG_DO | FLAG_START },
+ { "in", RES_IN, NOT_ASSIGNMENT , FLAG_DO },
+ { "do", RES_DO, MAYBE_ASSIGNMENT, FLAG_DONE },
+ { "done", RES_DONE, NOT_ASSIGNMENT , FLAG_END },
# endif
# if ENABLE_HUSH_CASE
- { "case", RES_CASE, NOT_ASSIGNMENT , FLAG_MATCH | FLAG_START },
- { "esac", RES_ESAC, NOT_ASSIGNMENT , FLAG_END },
+ { "case", RES_CASE, NOT_ASSIGNMENT , FLAG_MATCH | FLAG_START },
+ { "esac", RES_ESAC, NOT_ASSIGNMENT , FLAG_END },
# endif
};
const struct reserved_combo *r;
ctx->ctx_res_w = r->res;
ctx->old_flag = r->flag;
word->o_assignment = r->assignment_flag;
+ debug_printf_parse("word->o_assignment='%s'\n", assignment_flag[word->o_assignment]);
if (ctx->old_flag & FLAG_END) {
struct parse_context *old;
debug_printf_parse("word stored in rd_filename: '%s'\n", word->data);
ctx->pending_redirect = NULL;
} else {
- /* If this word wasn't an assignment, next ones definitely
- * can't be assignments. Even if they look like ones. */
- if (word->o_assignment != DEFINITELY_ASSIGNMENT
- && word->o_assignment != WORD_IS_KEYWORD
- ) {
- word->o_assignment = NOT_ASSIGNMENT;
- } else {
- if (word->o_assignment == DEFINITELY_ASSIGNMENT)
- command->assignment_cnt++;
- word->o_assignment = MAYBE_ASSIGNMENT;
- }
-
#if HAS_KEYWORDS
# if ENABLE_HUSH_CASE
if (ctx->ctx_dsemicolon
&& ctx->ctx_res_w != RES_CASE
# endif
) {
- debug_printf_parse("checking '%s' for reserved-ness\n", word->data);
- if (reserved_word(word, ctx)) {
+ int reserved = reserved_word(word, ctx);
+ debug_printf_parse("checking for reserved-ness: %d\n", reserved);
+ if (reserved) {
o_reset_to_empty_unquoted(word);
debug_printf_parse("done_word return %d\n",
(ctx->ctx_res_w == RES_SNTX));
"groups and arglists don't mix\n");
return 1;
}
+
+ /* If this word wasn't an assignment, next ones definitely
+ * can't be assignments. Even if they look like ones. */
+ if (word->o_assignment != DEFINITELY_ASSIGNMENT
+ && word->o_assignment != WORD_IS_KEYWORD
+ ) {
+ word->o_assignment = NOT_ASSIGNMENT;
+ } else {
+ if (word->o_assignment == DEFINITELY_ASSIGNMENT) {
+ command->assignment_cnt++;
+ debug_printf_parse("++assignment_cnt=%d\n", command->assignment_cnt);
+ }
+ debug_printf_parse("word->o_assignment was:'%s'\n", assignment_flag[word->o_assignment]);
+ word->o_assignment = MAYBE_ASSIGNMENT;
+ }
+ debug_printf_parse("word->o_assignment='%s'\n", assignment_flag[word->o_assignment]);
+
if (word->has_quoted_part
/* optimization: and if it's ("" or '') or ($v... or `cmd`...): */
&& (word->data[0] == '\0' || word->data[0] == SPECIAL_VAR_SYMBOL)
) {
p += 3;
}
- if (p == word->data || p[0] != '\0') {
- /* saw no "$@", or not only "$@" but some
- * real text is there too */
- /* insert "empty variable" reference, this makes
- * e.g. "", $empty"" etc to not disappear */
- o_addchr(word, SPECIAL_VAR_SYMBOL);
- o_addchr(word, SPECIAL_VAR_SYMBOL);
- }
}
command->argv = add_string_to_strings(command->argv, xstrdup(word->data));
debug_print_strings("word appended to argv", command->argv);
/* (this makes bare "&" cmd a no-op.
* bash says: "syntax error near unexpected token '&'") */
if (pi->num_cmds == 0
- IF_HAS_KEYWORDS( && pi->res_word == RES_NONE)
+ IF_HAS_KEYWORDS(&& pi->res_word == RES_NONE)
) {
free_pipe_list(pi);
pi = NULL;
&& is_well_formed_var_name(dest.data, '=')
) {
dest.o_assignment = DEFINITELY_ASSIGNMENT;
+ debug_printf_parse("dest.o_assignment='%s'\n", assignment_flag[dest.o_assignment]);
}
continue;
}
heredoc_cnt = 0;
}
dest.o_assignment = MAYBE_ASSIGNMENT;
+ debug_printf_parse("dest.o_assignment='%s'\n", assignment_flag[dest.o_assignment]);
ch = ';';
/* note: if (is_blank) continue;
* will still trigger for us */
}
done_pipe(&ctx, PIPE_SEQ);
dest.o_assignment = MAYBE_ASSIGNMENT;
+ debug_printf_parse("dest.o_assignment='%s'\n", assignment_flag[dest.o_assignment]);
/* Do we sit outside of any if's, loops or case's? */
if (!HAS_KEYWORDS
- IF_HAS_KEYWORDS(|| (ctx.ctx_res_w == RES_NONE && ctx.old_flag == 0))
+ IF_HAS_KEYWORDS(|| (ctx.ctx_res_w == RES_NONE && ctx.old_flag == 0))
) {
o_free(&dest);
#if !BB_MMU
/* ch is a special char and thus this word
* cannot be an assignment */
dest.o_assignment = NOT_ASSIGNMENT;
+ debug_printf_parse("dest.o_assignment='%s'\n", assignment_flag[dest.o_assignment]);
}
/* Note: nommu_addchr(&ctx.as_string, ch) is already done */
break;
case '\'':
dest.has_quoted_part = 1;
- while (1) {
- ch = i_getch(input);
- if (ch == EOF) {
- syntax_error_unterm_ch('\'');
- goto parse_error;
+ if (next == '\'' && !ctx.pending_redirect) {
+ insert_empty_quoted_str_marker:
+ nommu_addchr(&ctx.as_string, next);
+ i_getch(input); /* eat second ' */
+ o_addchr(&dest, SPECIAL_VAR_SYMBOL);
+ o_addchr(&dest, SPECIAL_VAR_SYMBOL);
+ } else {
+ while (1) {
+ ch = i_getch(input);
+ if (ch == EOF) {
+ syntax_error_unterm_ch('\'');
+ goto parse_error;
+ }
+ nommu_addchr(&ctx.as_string, ch);
+ if (ch == '\'')
+ break;
+ o_addqchr(&dest, ch);
}
- nommu_addchr(&ctx.as_string, ch);
- if (ch == '\'')
- break;
- o_addqchr(&dest, ch);
}
break;
case '"':
dest.has_quoted_part = 1;
+ if (next == '"' && !ctx.pending_redirect)
+ goto insert_empty_quoted_str_marker;
if (dest.o_assignment == NOT_ASSIGNMENT)
dest.o_expflags |= EXP_FLAG_ESC_GLOB_CHARS;
if (!encode_string(&ctx.as_string, &dest, input, '"', /*process_bkslash:*/ 1))
break;
#if ENABLE_HUSH_TICK
case '`': {
- unsigned pos;
+ USE_FOR_NOMMU(unsigned pos;)
o_addchr(&dest, SPECIAL_VAR_SYMBOL);
o_addchr(&dest, '`');
- pos = dest.length;
+ USE_FOR_NOMMU(pos = dest.length;)
if (!add_till_backquote(&dest, input, /*in_dquote:*/ 0))
goto parse_error;
# if !BB_MMU
/* We just finished a cmd. New one may start
* with an assignment */
dest.o_assignment = MAYBE_ASSIGNMENT;
+ debug_printf_parse("dest.o_assignment='%s'\n", assignment_flag[dest.o_assignment]);
break;
case '&':
if (done_word(&dest, &ctx)) {
/* Store given string, finalizing the word and starting new one whenever
* we encounter IFS char(s). This is used for expanding variable values.
- * End-of-string does NOT finalize word: think about 'echo -$VAR-' */
-static int expand_on_ifs(o_string *output, int n, const char *str)
+ * End-of-string does NOT finalize word: think about 'echo -$VAR-'.
+ * Return in *ended_with_ifs:
+ * 1 - ended with IFS char, else 0 (this includes case of empty str).
+ */
+static int expand_on_ifs(int *ended_with_ifs, o_string *output, int n, const char *str)
{
+ int last_is_ifs = 0;
+
while (1) {
- int word_len = strcspn(str, G.ifs);
+ int word_len;
+
+ if (!*str) /* EOL - do not finalize word */
+ break;
+ word_len = strcspn(str, G.ifs);
if (word_len) {
+ /* We have WORD_LEN leading non-IFS chars */
if (!(output->o_expflags & EXP_FLAG_GLOB)) {
o_addblock(output, str, word_len);
} else {
/*o_addblock(output, str, word_len); - WRONG: "v='\*'; echo Z$v" prints "Z*" instead of "Z\*" */
/*o_addqblock(output, str, word_len); - WRONG: "v='*'; echo Z$v" prints "Z*" instead of Z* files */
}
+ last_is_ifs = 0;
str += word_len;
+ if (!*str) /* EOL - do not finalize word */
+ break;
}
+
+ /* We know str here points to at least one IFS char */
+ last_is_ifs = 1;
+ str += strspn(str, G.ifs); /* skip IFS chars */
if (!*str) /* EOL - do not finalize word */
break;
- o_addchr(output, '\0');
- debug_print_list("expand_on_ifs", output, n);
- n = o_save_ptr(output, n);
- str += strspn(str, G.ifs); /* skip ifs chars */
+
+ /* Start new word... but not always! */
+ /* Case "v=' a'; echo ''$v": we do need to finalize empty word: */
+ if (output->has_quoted_part
+ /* Case "v=' a'; echo $v":
+ * here nothing precedes the space in $v expansion,
+ * therefore we should not finish the word
+ * (IOW: if there *is* word to finalize, only then do it):
+ */
+ || (n > 0 && output->data[output->length - 1])
+ ) {
+ o_addchr(output, '\0');
+ debug_print_list("expand_on_ifs", output, n);
+ n = o_save_ptr(output, n);
+ }
}
+
+ if (ended_with_ifs)
+ *ended_with_ifs = last_is_ifs;
debug_print_list("expand_on_ifs[1]", output, n);
return n;
}
* expansion of right-hand side of assignment == 1-element expand.
*/
char cant_be_null = 0; /* only bit 0x80 matters */
+ int ended_in_ifs = 0; /* did last unquoted expansion end with IFS chars? */
char *p;
debug_printf_expand("expand_vars_to_list: arg:'%s' singleword:%x\n", arg,
#if ENABLE_SH_MATH_SUPPORT
char arith_buf[sizeof(arith_t)*3 + 2];
#endif
+
+ if (ended_in_ifs) {
+ o_addchr(output, '\0');
+ n = o_save_ptr(output, n);
+ ended_in_ifs = 0;
+ }
+
o_addblock(output, arg, p - arg);
debug_print_list("expand_vars_to_list[1]", output, n);
arg = ++p;
cant_be_null |= first_ch; /* do it for "$@" _now_, when we know it's not empty */
if (!(first_ch & 0x80)) { /* unquoted $* or $@ */
while (G.global_argv[i]) {
- n = expand_on_ifs(output, n, G.global_argv[i]);
+ n = expand_on_ifs(NULL, output, n, G.global_argv[i]);
debug_printf_expand("expand_vars_to_list: argv %d (last %d)\n", i, G.global_argc - 1);
if (G.global_argv[i++][0] && G.global_argv[i]) {
/* this argv[] is not empty and not last:
if (G.ifs[0])
o_addchr(output, G.ifs[0]);
}
+ output->has_quoted_part = 1;
}
break;
}
case SPECIAL_VAR_SYMBOL: /* <SPECIAL_VAR_SYMBOL><SPECIAL_VAR_SYMBOL> */
/* "Empty variable", used to make "" etc to not disappear */
+ output->has_quoted_part = 1;
arg++;
cant_be_null = 0x80;
break;
debug_printf_expand("unquoted '%s', output->o_escape:%d\n", val,
!!(output->o_expflags & EXP_FLAG_ESC_GLOB_CHARS));
if (val && val[0]) {
- n = expand_on_ifs(output, n, val);
+ n = expand_on_ifs(&ended_in_ifs, output, n, val);
val = NULL;
}
} else { /* quoted $VAR, val will be appended below */
+ output->has_quoted_part = 1;
debug_printf_expand("quoted '%s', output->o_escape:%d\n", val,
!!(output->o_expflags & EXP_FLAG_ESC_GLOB_CHARS));
}
} /* end of "while (SPECIAL_VAR_SYMBOL is found) ..." */
if (arg[0]) {
+ if (ended_in_ifs) {
+ o_addchr(output, '\0');
+ n = o_save_ptr(output, n);
+ }
debug_print_list("expand_vars_to_list[a]", output, n);
/* this part is literal, and it was already pre-quoted
* if needed (much earlier), do not use o_addQstr here! */
}
-#if BB_MMU
-/* never called */
-void re_execute_shell(char ***to_free, const char *s,
- char *g_argv0, char **g_argv,
- char **builtin_argv) NORETURN;
-
static void switch_off_special_sigs(unsigned mask)
{
unsigned sig = 0;
G.traps[sig] = NULL;
}
/* We are here only if no trap or trap was not '' */
- signal(sig, SIG_DFL);
+ install_sighandler(sig, SIG_DFL);
}
}
+#if BB_MMU
+/* never called */
+void re_execute_shell(char ***to_free, const char *s,
+ char *g_argv0, char **g_argv,
+ char **builtin_argv) NORETURN;
+
static void reset_traps_to_defaults(void)
{
/* This function is always called in a child shell
/* There is no signal for trap 0 (EXIT) */
if (sig == 0)
continue;
- signal(sig, pick_sighandler(sig));
+ install_sighandler(sig, pick_sighandler(sig));
}
}
* _inside_ group (just before echo 1), it works.
*
* I conclude it means we don't need to pass active traps here.
- * Even if we would use signal handlers instead of signal masking
- * in order to implement trap handling,
- * exec syscall below resets signals to SIG_DFL for us.
*/
*pp++ = (char *) "-c";
*pp++ = (char *) s;
do_exec:
debug_printf_exec("re_execute_shell pid:%d cmd:'%s'\n", getpid(), s);
- switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
+ /* Don't propagate SIG_IGN to the child */
+ if (SPECIAL_JOBSTOP_SIGS != 0)
+ switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
execve(bb_busybox_exec_path, argv, pp);
/* Fallback. Useful for init=/bin/hush usage etc */
if (argv[0][0] == '/')
static void execvp_or_die(char **argv)
{
debug_printf_exec("execing '%s'\n", argv[0]);
- switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
+ /* Don't propagate SIG_IGN to the child */
+ if (SPECIAL_JOBSTOP_SIGS != 0)
+ switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
execvp(argv[0], argv);
bb_perror_msg("can't execute '%s'", argv[0]);
_exit(127); /* bash compat */
# endif
/* Re-exec ourselves */
debug_printf_exec("re-execing applet '%s'\n", argv[0]);
- switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
+ /* Don't propagate SIG_IGN to the child */
+ if (SPECIAL_JOBSTOP_SIGS != 0)
+ switch_off_special_sigs(G.special_sig_mask & SPECIAL_JOBSTOP_SIGS);
execv(bb_busybox_exec_path, argv);
/* If they called chroot or otherwise made the binary no longer
* executable, fall through */
}
fg_pipe->cmds[i].cmd_exitcode = ex;
} else {
- fg_pipe->cmds[i].is_stopped = 1;
fg_pipe->stopped_cmds++;
}
debug_printf_jobs("fg_pipe: alive_cmds %d stopped_cmds %d\n",
}
} else {
/* child stopped */
- pi->cmds[i].is_stopped = 1;
pi->stopped_cmds++;
}
#endif
* and we should not execute CMD */
debug_printf_exec("skipped cmd because of || or &&\n");
last_followup = pi->followup;
- continue;
+ goto dont_check_jobs_but_continue;
}
}
last_followup = pi->followup;
G.flag_break_continue = 0;
/* else: e.g. "continue 2" should *break* once, *then* continue */
} /* else: "while... do... { we are here (innermost list is not a loop!) };...done" */
- if (G.depth_break_continue != 0 || fbc == BC_BREAK)
- goto check_jobs_and_break;
+ if (G.depth_break_continue != 0 || fbc == BC_BREAK) {
+ checkjobs(NULL);
+ break;
+ }
/* "continue": simulate end of loop */
rword = RES_DONE;
continue;
#endif
#if ENABLE_HUSH_FUNCTIONS
if (G.flag_return_in_progress == 1) {
- /* same as "goto check_jobs_and_break" */
checkjobs(NULL);
break;
}
if (rword == RES_IF || rword == RES_ELIF)
cond_code = rcode;
#endif
+ check_jobs_and_continue:
+ checkjobs(NULL);
+ dont_check_jobs_but_continue: ;
#if ENABLE_HUSH_LOOPS
/* Beware of "while false; true; do ..."! */
- if (pi->next && pi->next->res_word == RES_DO) {
+ if (pi->next
+ && (pi->next->res_word == RES_DO || pi->next->res_word == RES_DONE)
+ /* check for RES_DONE is needed for "while ...; do \n done" case */
+ ) {
if (rword == RES_WHILE) {
if (rcode) {
/* "while false; do...done" - exitcode 0 */
G.last_exitcode = rcode = EXIT_SUCCESS;
debug_printf_exec(": while expr is false: breaking (exitcode:EXIT_SUCCESS)\n");
- goto check_jobs_and_break;
+ break;
}
}
if (rword == RES_UNTIL) {
if (!rcode) {
debug_printf_exec(": until expr is true: breaking\n");
- check_jobs_and_break:
- checkjobs(NULL);
break;
}
}
}
#endif
-
- check_jobs_and_continue:
- checkjobs(NULL);
} /* for (pi) */
#if ENABLE_HUSH_JOB
sig++;
if (!(mask & 1))
continue;
- old_handler = signal(sig, pick_sighandler(sig));
+ old_handler = install_sighandler(sig, pick_sighandler(sig));
/* POSIX allows shell to re-enable SIGCHLD
* even if it was SIG_IGN on entry.
* Therefore we skip IGN check for it:
continue;
if (old_handler == SIG_IGN) {
/* oops... restore back to IGN, and record this fact */
- signal(sig, old_handler);
+ install_sighandler(sig, old_handler);
if (!G.traps)
G.traps = xzalloc(sizeof(G.traps[0]) * NSIG);
free(G.traps[sig]);
#if ENABLE_FEATURE_EDITING
G.line_input_state = new_line_input_t(FOR_SHELL);
-# if defined MAX_HISTORY && MAX_HISTORY > 0 && ENABLE_HUSH_SAVEHISTORY
- {
- const char *hp = get_local_var_value("HISTFILE");
- if (!hp) {
- hp = get_local_var_value("HOME");
- if (hp) {
- G.line_input_state->hist_file = concat_path_file(hp, ".hush_history");
- //set_local_var(xasprintf("HISTFILE=%s", ...));
- }
- }
-# if ENABLE_FEATURE_SH_HISTFILESIZE
- hp = get_local_var_value("HISTFILESIZE");
- G.line_input_state->max_history = size_from_HISTFILESIZE(hp);
-# endif
- }
-# endif
#endif
/* Initialize some more globals to non-zero values */
for (sig = 1; sig < NSIG; sig++) {
if (empty_trap_mask & (1LL << sig)) {
G.traps[sig] = xzalloc(1); /* == xstrdup(""); */
- signal(sig, SIG_IGN);
+ install_sighandler(sig, SIG_IGN);
}
}
}
/* -1 is special - makes xfuncs longjmp, not exit
* (we reset die_sleep = 0 whereever we [v]fork) */
enable_restore_tty_pgrp_on_exit(); /* sets die_sleep = -1 */
+
+# if ENABLE_HUSH_SAVEHISTORY && MAX_HISTORY > 0
+ {
+ const char *hp = get_local_var_value("HISTFILE");
+ if (!hp) {
+ hp = get_local_var_value("HOME");
+ if (hp)
+ hp = concat_path_file(hp, ".hush_history");
+ } else {
+ hp = xstrdup(hp);
+ }
+ if (hp) {
+ G.line_input_state->hist_file = hp;
+ //set_local_var(xasprintf("HISTFILE=%s", ...));
+ }
+# if ENABLE_FEATURE_SH_HISTFILESIZE
+ hp = get_local_var_value("HISTFILESIZE");
+ G.line_input_state->max_history = size_from_HISTFILESIZE(hp);
+# endif
+ }
+# endif
} else {
install_special_sighandlers();
}
* (if there are _stopped_ jobs, running ones don't count)
* # exit
* exit
- # EEE (then bash exits)
+ * EEE (then bash exits)
*
* TODO: we can use G.exiting = -1 as indicator "last cmd was exit"
*/
else
/* We are removing trap handler */
handler = pick_sighandler(sig);
- signal(sig, handler);
+ install_sighandler(sig, handler);
}
return ret;
}
debug_printf_jobs("reviving %d procs, pgrp %d\n", pi->num_cmds, pi->pgrp);
for (i = 0; i < pi->num_cmds; i++) {
debug_printf_jobs("reviving pid %d\n", pi->cmds[i].pid);
- pi->cmds[i].is_stopped = 0;
}
pi->stopped_cmds = 0;
}
#endif
+#if MAX_HISTORY && ENABLE_FEATURE_EDITING
+static int FAST_FUNC builtin_history(char **argv UNUSED_PARAM)
+{
+ show_history(G.line_input_state);
+ return EXIT_SUCCESS;
+}
+#endif
+
#if ENABLE_HUSH_JOB
static int FAST_FUNC builtin_jobs(char **argv UNUSED_PARAM)
{
free(arg_path);
if (!input) {
/* bb_perror_msg("%s", *argv); - done by fopen_or_warn */
+ /* POSIX: non-interactive shell should abort here,
+ * not merely fail. So far no one complained :)
+ */
return EXIT_FAILURE;
}
close_on_exec_on(fileno(input));
/* "we are inside sourced file, ok to use return" */
G.flag_return_in_progress = -1;
#endif
- save_and_replace_G_args(&sv, argv);
+ if (argv[1])
+ save_and_replace_G_args(&sv, argv);
parse_and_run_file(input);
fclose(input);
- restore_G_args(&sv, argv);
+ if (argv[1])
+ restore_G_args(&sv, argv);
#if ENABLE_HUSH_FUNCTIONS
G.flag_return_in_progress = sv_flg;
#endif
projects / platform / upstream / busybox.git / blobdiff