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slowread(): Turn off O_NONBLOCK for stdin if it is on (#471)

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This change turns off O_NONBLOCK for stdin if a previously ran
program left it on so that interactive programs that expect it
to be off work properly.

src/cmd/ksh93/sh/io.c: slowread():
- Turn off O_NONBLOCK for stdin if it is on.

Fixes: https://github.com/ksh93/ksh/issues/469
This commit is contained in:
atheik 2022-02-23 05:39:15 +02:00 • committed by Martijn Dekker
parent e87dbebebd
commit 2e5fd4d4c1
4 changed files with 17 additions and 2 deletions
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10
src/cmd/ksh93/sh/io.c
View file

@ -1944,7 +1944,7 @@ static ssize_t piperead(Sfio_t *iop,void *buff,register size_t size,Sfdisc_t *ha
static ssize_t slowread(Sfio_t *iop,void *buff,register size_t size,Sfdisc_t *handle)
{
int (*readf)(void*, int, char*, int, int);
int reedit=0, rsize;
int reedit=0, rsize, n, fno;
#if SHOPT_HISTEXPAND
char *xp=0;
#endif /* SHOPT_HISTEXPAND */
@ -1969,6 +1969,14 @@ static ssize_t slowread(Sfio_t *iop,void *buff,register size_t size,Sfdisc_t *ha
errno = EINTR;
return(-1);
}
fno = sffileno(iop);
#ifdef O_NONBLOCK
if((n=fcntl(fno,F_GETFL,0))!=-1 && n&O_NONBLOCK)
{
n &= ~O_NONBLOCK;
fcntl(fno, F_SETFL, n);
}
#endif /* O_NONBLOCK */
while(1)
{
if(io_prompt(iop,sh.nextprompt)<0 && errno==EIO)