oss-sec mailing list archives
Re: AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour?
From: Daniel Kahn Gillmor <dkg () fifthhorseman net>
Date: Wed, 26 Nov 2014 11:04:38 -0500
On 11/26/2014 10:28 AM, Fiedler Roman wrote:
Von: Eric Blake [mailto:eblake () redhat com] But if it succeeds, and did NOT create a directory, then it is in violation of POSIX.Thanks for the pointer to the POSIX documentation. So it seems to be a POSIX-violation, at least on "Linux version 3.2.0-69-generic". My test program was: #include <fcntl.h> #include <stdio.h> #include <sys/stat.h> int main(int argc, char **argv) { int fd; struct stat statBuf; int result; fd=open("xxx", O_RDWR|O_CREAT|O_DIRECTORY, 0600); result=fstat(fd, &statBuf); if(result) { fprintf(stderr, "Stat failed\n"); return(1); } fprintf(stderr, "New element type is %d\n", S_ISDIR(fd)); return(0); }
I just tried the above on debian's 3.17-1-amd64 (3.17-1~exp1, and it produces: New element type is 0 So if it's a violation, it hasn't been fixed between 3.2 and 3.17. --dkg
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Current thread:
- O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Fiedler Roman (Nov 26)
- Re: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Eric Blake (Nov 26)
- AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Fiedler Roman (Nov 26)
- Re: AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Daniel Kahn Gillmor (Nov 26)
- Re: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Matthew Daley (Nov 26)
- AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Fiedler Roman (Nov 26)
- Re: AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Andy Lutomirski (Dec 01)
- AW: Re: AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Fiedler Roman (Dec 15)
- AW: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Fiedler Roman (Nov 26)
- Re: O_CREAT|O_DIRECTORY on nonexisting file expected behaviour? Eric Blake (Nov 26)