[1592] in testers
edsc loops
daemon@ATHENA.MIT.EDU (daemon@ATHENA.MIT.EDU)
Sun Jul 28 21:17:14 1991
To: testers@ATHENA.MIT.EDU, bug-discuss@ATHENA.MIT.EDU
Date: Sun, 28 Jul 91 21:17:17 EDT
From: John Carr <jfc@ATHENA.MIT.EDU>
Running the RT 7.3 edsc I tried to switch the transaction flag in emacs
discuss. edsc looped eating CPU time. adb says:
_.write() from _.do_gtf+0x284
_.do_gtf(r12=0x1fff9b10) from _.main+0x2b6
_.main(r2= 00000000, r3=0x1fff9b10) from .oVncs+0x2e
.oVncs(r2= 00000000, r3=0x1fff9b10, r4= 00000000)
(By the way, there are at least two function named "do_gtf" in the edsc
source directory. It took me a while to find the right one.)
The source code is:
while ((cc = read(rfd, buf, sizeof(buf))) >= 0) {
if (cc != write(fd, buf, cc)) {
printf("; Failed write!\n");
dsc_destroy_name_blk(&nb);
return;
}
}
The ">= 0" should be "> 0": if read gets EOF write should not be
called and the loop should not continue.
Why did 'F' work when I used the SIPB version? Isn't the source identical?
