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ash: distinguish 'wait -n' from other bashisms

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Add a specific define to indicate which bash compatibility code
implements 'wait -n'.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ron Yorston 2019-03-31 09:27:09 +01:00 committed by Denys Vlasenko
parent 8939359180
commit e48559eae3
1 changed files with 8 additions and 7 deletions
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15
shell/ash.c
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@ -224,6 +224,7 @@
#define BASH_XTRACEFD ENABLE_ASH_BASH_COMPAT
#define BASH_READ_D ENABLE_ASH_BASH_COMPAT
#define IF_BASH_READ_D IF_ASH_BASH_COMPAT
#define BASH_WAIT_N ENABLE_ASH_BASH_COMPAT
#if defined(__ANDROID_API__) && __ANDROID_API__ <= 24
/* Bionic at least up to version 24 has no glob() */
@ -4235,7 +4236,7 @@ wait_block_or_sig(int *status)
#define DOWAIT_NONBLOCK 0
#define DOWAIT_BLOCK 1
#define DOWAIT_BLOCK_OR_SIG 2
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
# define DOWAIT_JOBSTATUS 0x10 /* OR this to get job's exitstatus instead of pid */
#endif
@ -4246,7 +4247,7 @@ dowait(int block, struct job *job)
int status;
struct job *jp;
struct job *thisjob;
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
bool want_jobexitstatus = (block & DOWAIT_JOBSTATUS);
block = (block & ~DOWAIT_JOBSTATUS);
#endif
@ -4348,7 +4349,7 @@ dowait(int block, struct job *job)
out:
INT_ON;
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
if (want_jobexitstatus) {
pid = -1;
if (thisjob && thisjob->state == JOBDONE)
@ -4537,7 +4538,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
struct job *job;
int retval;
struct job *jp;
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
int status;
char one = nextopt("n");
#else
@ -4550,7 +4551,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
/* wait for all jobs / one job if -n */
for (;;) {
jp = curjob;
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
if (one && !jp)
/* exitcode of "wait -n" with nothing to wait for is 127, not 0 */
retval = 127;
@ -4570,7 +4571,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
* with an exit status greater than 128, immediately after which
* the trap is executed."
*/
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
status = dowait(DOWAIT_BLOCK_OR_SIG | DOWAIT_JOBSTATUS, NULL);
#else
dowait(DOWAIT_BLOCK_OR_SIG, NULL);
@ -4581,7 +4582,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
*/
if (pending_sig)
goto sigout;
#if ENABLE_ASH_BASH_COMPAT
#if BASH_WAIT_N
if (one) {
/* wait -n waits for one _job_, not one _process_.
* date; sleep 3 & sleep 2 | sleep 1 & wait -n; date