Date: Fri, 08 Nov 2019 09:17:22 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 221331] [PATCH] update for unlink(2) manpage Message-ID: <bug-221331-227-BShtmNe3Io@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-221331-227@https.bugs.freebsd.org/bugzilla/> References: <bug-221331-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D221331 Oleksandr Tymoshenko <gonzo@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |doc@FreeBSD.org Component|Documentation |Manual Pages Assignee|doc@FreeBSD.org |bugs@FreeBSD.org WHR <msl0000023508@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |msl0000023508@gmail.com --- Comment #1 from WHR <msl0000023508@gmail.com> --- There was a case that unlink(2) may return EISDIR. Function kern_unlinkat calls namei(9) to find the parent directory of the f= ile; it will return EISDIR if the requested path was '/'. Since '/' isn't a real link (but '/.' and '/..'), it can't be unlinked anyw= ays. Test: # cat unlink.c=20 #include <unistd.h> #include <stdio.h> int main(int argc, char **argv) { if(argc !=3D 2) { fprintf(stderr, "Usage: %s <path>\n", argv[0]); return -1; } if(unlink(argv[1]) < 0) { perror(argv[1]); return 1; } return 0; } # gcc -Wall -O1 unlink.c -o unlink # ./unlink /etc/ /etc/: Operation not permitted # ./unlink /. /.: Operation not permitted # ./unlink / /: Is a directory --=20 You are receiving this mail because: You are the assignee for the bug.=
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