diff options
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 23 | ||||
| -rw-r--r-- | shell/ash_test/ash-signals/savetrap.right | 5 | ||||
| -rwxr-xr-x | shell/ash_test/ash-signals/savetrap.tests | 7 | ||||
| -rw-r--r-- | shell/hush_test/hush-trap/savetrap.right | 5 | ||||
| -rwxr-xr-x | shell/hush_test/hush-trap/savetrap.tests | 7 |
5 files changed, 38 insertions, 9 deletions
diff --git a/shell/ash.c b/shell/ash.c index 47f968b54..b30dc7728 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -193,6 +193,7 @@ struct globals_misc { /* indicates specified signal received */ uint8_t gotsig[NSIG - 1]; /* offset by 1: "signal" 0 is meaningless */ char *trap[NSIG]; + char **trap_ptr; /* used only by "trap hack" */ /* Rarely referenced stuff */ #if ENABLE_ASH_RANDOM_SUPPORT @@ -222,6 +223,7 @@ extern struct globals_misc *const ash_ptr_to_globals_misc; #define sigmode (G_misc.sigmode ) #define gotsig (G_misc.gotsig ) #define trap (G_misc.trap ) +#define trap_ptr (G_misc.trap_ptr ) #define random_galois_LFSR (G_misc.random_galois_LFSR) #define random_LCG (G_misc.random_LCG ) #define backgndpid (G_misc.backgndpid ) @@ -231,6 +233,7 @@ extern struct globals_misc *const ash_ptr_to_globals_misc; barrier(); \ curdir = nullstr; \ physdir = nullstr; \ + trap_ptr = trap; \ } while (0) @@ -4539,7 +4542,7 @@ static void closescript(void); #if !JOBS # define forkchild(jp, n, mode) forkchild(jp, mode) #endif -static void +static NOINLINE void forkchild(struct job *jp, union node *n, int mode) { int oldlvl; @@ -4596,8 +4599,10 @@ forkchild(struct job *jp, union node *n, int mode) * * Our solution: ONLY bare $(trap) or `trap` is special. */ - free(trap[0]); /* Prevent EXIT trap from firing in `trap` */ - trap[0] = NULL; + /* This is needed to prevent EXIT trap firing and such + * (trap_ptr will be freed in trapcmd()) */ + trap_ptr = memcpy(xmalloc(sizeof(trap)), trap, sizeof(trap)); + memset(trap, 0, sizeof(trap)); } else { clear_traps(); } @@ -12260,15 +12265,23 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) ap = argptr; if (!*ap) { for (signo = 0; signo < NSIG; signo++) { - if (trap[signo] != NULL) { + char *tr = trap_ptr[signo]; + if (tr) { out1fmt("trap -- %s %s%s\n", - single_quote(trap[signo]), + single_quote(tr), (signo == 0 ? "" : "SIG"), get_signame(signo)); + if (trap_ptr != trap) + free(tr); } } + if (trap_ptr != trap) { + free(trap_ptr); + trap_ptr = trap; + } return 0; } + action = NULL; if (ap[1]) action = *ap++; diff --git a/shell/ash_test/ash-signals/savetrap.right b/shell/ash_test/ash-signals/savetrap.right index 2d33427aa..9cfd7a56c 100644 --- a/shell/ash_test/ash-signals/savetrap.right +++ b/shell/ash_test/ash-signals/savetrap.right @@ -1,3 +1,8 @@ +trap -- 'echo Exiting' EXIT trap -- 'echo WINCH!' SIGWINCH +trap -- 'echo Exiting' EXIT +trap -- 'echo WINCH!' SIGWINCH +trap -- 'echo Exiting' EXIT trap -- 'echo WINCH!' SIGWINCH Done +Exiting diff --git a/shell/ash_test/ash-signals/savetrap.tests b/shell/ash_test/ash-signals/savetrap.tests index 6492e86a2..c2b312fb8 100755 --- a/shell/ash_test/ash-signals/savetrap.tests +++ b/shell/ash_test/ash-signals/savetrap.tests @@ -1,6 +1,9 @@ +trap 'echo Exiting' EXIT trap 'echo WINCH!' SIGWINCH v=` trap ` -echo $v +echo "$v" +v=$( trap ) +echo "$v" v=`trap` -echo $v +echo "$v" echo Done diff --git a/shell/hush_test/hush-trap/savetrap.right b/shell/hush_test/hush-trap/savetrap.right index 2d33427aa..9cfd7a56c 100644 --- a/shell/hush_test/hush-trap/savetrap.right +++ b/shell/hush_test/hush-trap/savetrap.right @@ -1,3 +1,8 @@ +trap -- 'echo Exiting' EXIT trap -- 'echo WINCH!' SIGWINCH +trap -- 'echo Exiting' EXIT +trap -- 'echo WINCH!' SIGWINCH +trap -- 'echo Exiting' EXIT trap -- 'echo WINCH!' SIGWINCH Done +Exiting diff --git a/shell/hush_test/hush-trap/savetrap.tests b/shell/hush_test/hush-trap/savetrap.tests index 6492e86a2..c2b312fb8 100755 --- a/shell/hush_test/hush-trap/savetrap.tests +++ b/shell/hush_test/hush-trap/savetrap.tests @@ -1,6 +1,9 @@ +trap 'echo Exiting' EXIT trap 'echo WINCH!' SIGWINCH v=` trap ` -echo $v +echo "$v" +v=$( trap ) +echo "$v" v=`trap` -echo $v +echo "$v" echo Done |