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hush: improve set -x: make "+++" indent level increase in cmd and eval.

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function                                             old     new   delta
dump_cmd_in_x_mode                                   126     144     +18
run_pipe                                            1873    1883     +10
builtin_eval                                         119     127      +8
expand_vars_to_list                                 1100    1103      +3
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(add/remove: 0/0 grow/shrink: 4/0 up/down: 39/0)               Total: 39 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-07-26 15:21:50 +02:00
parent 871bd2abac
commit 7c5f18a3ba
1 changed files with 19 additions and 9 deletions
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28
shell/hush.c
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@ -896,6 +896,7 @@ struct globals {
char o_opt[NUM_OPT_O];
#if ENABLE_HUSH_MODE_X
smalluint x_mode_depth;
# define G_x_mode (G.o_opt[OPT_O_XTRACE])
#else
# define G_x_mode 0
@ -7182,11 +7183,8 @@ static int generate_stream_from_string(const char *s, pid_t *pid_p)
+ (1 << SIGTTIN)
+ (1 << SIGTTOU)
, SIG_IGN);
CLEAR_RANDOM_T(&G.random_gen); /* or else $RANDOM repeats in child */
close(channel[0]); /* NB: close _first_, then move fd! */
xmove_fd(channel[1], 1);
/* Prevent it from trying to handle ctrl-z etc */
IF_HUSH_JOB(G.run_list_level = 1;)
# if ENABLE_HUSH_TRAP
/* Awful hack for `trap` or $(trap).
*
@ -7233,7 +7231,11 @@ static int generate_stream_from_string(const char *s, pid_t *pid_p)
}
# endif
# if BB_MMU
/* Prevent it from trying to handle ctrl-z etc */
IF_HUSH_JOB(G.run_list_level = 1;)
CLEAR_RANDOM_T(&G.random_gen); /* or else $RANDOM repeats in child */
reset_traps_to_defaults();
IF_HUSH_MODE_X(G.x_mode_depth++;)
parse_and_run_string(s);
_exit(G.last_exitcode);
# else
@ -8022,13 +8024,14 @@ static void dump_cmd_in_x_mode(char **argv)
int len;
int n;
len = 3;
len = G.x_mode_depth + 3; /* "+[+++...]<cmd...>\n\0" */
n = 0;
while (argv[n])
len += strlen(argv[n++]) + 1;
buf = xmalloc(len);
buf[0] = '+';
p = buf + 1;
p = buf = xmalloc(len);
n = G.x_mode_depth;
while (n-- >= 0)
*p++ = '+';
n = 0;
while (argv[n])
p += sprintf(p, " %s", argv[n++]);
@ -8821,8 +8824,13 @@ static NOINLINE int run_pipe(struct pipe *pi)
restore_redirects(squirrel);
/* Set shell variables */
if (G_x_mode)
bb_putchar_stderr('+');
#if ENABLE_HUSH_MODE_X
if (G_x_mode) {
int n = G.x_mode_depth;
while (n-- >= 0)
bb_putchar_stderr('+');
}
#endif
i = 0;
while (i < command->assignment_cnt) {
char *p = expand_string_to_string(argv[i],
@ -10226,6 +10234,7 @@ static int FAST_FUNC builtin_eval(char **argv)
if (!argv[0])
return EXIT_SUCCESS;
IF_HUSH_MODE_X(G.x_mode_depth++;)
if (!argv[1]) {
/* bash:
* eval "echo Hi; done" ("done" is syntax error):
@ -10255,6 +10264,7 @@ static int FAST_FUNC builtin_eval(char **argv)
parse_and_run_string(str);
free(str);
}
IF_HUSH_MODE_X(G.x_mode_depth--;)
return G.last_exitcode;
}