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Handle select() returning -1/EINTR - fairly common in these KSE days.

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PR:		74972
MFC after:	3 days
This commit is contained in:
Brian Somers 2004-12-13 14:50:13 +00:00
parent 2d59a44dc0
commit cf4bdb6e94
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=138808
1 changed files with 5 additions and 1 deletions
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6
usr.sbin/pppctl/pppctl.c
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@ -124,6 +124,7 @@ Receive(int fd, int display)
char *last;
fd_set f;
int len;
int err;
FD_ZERO(&f);
FD_SET(fd, &f);
@ -133,7 +134,7 @@ Receive(int fd, int display)
len = 0;
while (Result = read(fd, Buffer+len, sizeof(Buffer)-len-1), Result != -1) {
if (Result == 0 && errno != EINTR) {
if (Result == 0) {
Result = -1;
break;
}
@ -186,8 +187,11 @@ Receive(int fd, int display)
len -= flush;
}
if ((Result = select(fd + 1, &f, NULL, NULL, &t)) <= 0) {
err = Result == -1 ? errno : 0;
if (len)
write(STDOUT_FILENO, Buffer, len);
if (err == EINTR)
continue;
break;
}
}