Date: Fri, 20 Sep 2024 16:51:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 281574] bc(1) runs in endless loop Message-ID: <bug-281574-227-IhzjyIyO8k@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-281574-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281574 --- Comment #4 from John F. Carr <jfc@mit.edu> --- I was looking in the wrong place for bc when I commented on the change history. Source directory usr.bin/bc is not the one that is installed. (That one also behaves oddly in response to ^D, probably due to the "error QUIT" rule in the grammar not causing it to quit.) Here is what truss says when I type ^D to an older bc, version 5.2.2 or 6.7.6: 28787: ioctl(0,TIOCSETAW,0x75c7d3a5b264) = 0 (0x0) 28787: read(0,"\^D",1) = 1 (0x1) 28787: fstat(1,{ mode=crw--w---- ,inode=96,size=0,blksize=4096 }) = 0 (0x0) 28787: ioctl(1,TIOCGETA,0x4c2f87f0125c) = 0 (0x0) 28787: write(1,"^D",2) = 2 (0x2) 28787: ioctl(0,TIOCSETAW,0x75c7d3a5b238) = 0 (0x0) 28787: write(1,"\n",1) = 1 (0x1) 28787: ioctl(0,TIOCSETAF,0x75c7d3a5b20c) = 0 (0x0) 28787: exit(0x0) All is well despite the odd behavior of a literal ^D being read. If I have 7.0.1 then it does not quit and truss says 37822: ioctl(0,TIOCSETAW,0x88d4efe5b264) = 0 (0x0) 37822: read(0,"\^D",1) = 1 (0x1) 37822: fstat(1,{ mode=crw------- ,inode=45,size=0,blksize=4096 }) = 0 (0x0) 37822: ioctl(1,TIOCGETA,0x7ddad4152e7c) = 0 (0x0) 37822: write(1,"^D",2) = 2 (0x2) 37822: ioctl(0,TIOCSETAW,0x88d4efe5b238) = 0 (0x0) 37822: sigprocmask(SIG_BLOCK,{ SIGWINCH },{ }) = 0 (0x0) 37822: ioctl(0,TIOCGWINSZ,0x7ddad4153100) = 0 (0x0) 37822: sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0) 37822: ioctl(0,TIOCGETA,0x88d4efe5b290) = 0 (0x0) 37822: ioctl(0,TIOCSETAW,0x88d4efe5b264) -- You are receiving this mail because: You are the assignee for the bug.home | help
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