diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/pathconf.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/pathconf.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/pathconf.c b/sysdeps/unix/sysv/linux/pathconf.c index e12a08434a..db03529fe8 100644 --- a/sysdeps/unix/sysv/linux/pathconf.c +++ b/sysdeps/unix/sysv/linux/pathconf.c @@ -1,5 +1,5 @@ /* Get file-specific information about a file. Linux version. - Copyright (C) 1991,1995,1996,1998-2002,2003 Free Software Foundation, Inc. + Copyright (C) 1991,1995,1996,1998-2003,2008 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -19,8 +19,10 @@ #include <unistd.h> #include <errno.h> + #include "pathconf.h" #include "linux_fsinfo.h" +#include <not-cancel.h> static long int posix_pathconf (const char *file, int name); @@ -46,6 +48,9 @@ __pathconf (const char *file, int name) case _PC_2_SYMLINKS: return __statfs_symlinks (__statfs (file, &fsbuf), &fsbuf); + case _PC_CHOWN_RESTRICTED: + return __statfs_chown_restricted (__statfs (file, &fsbuf), &fsbuf); + default: return posix_pathconf (file, name); } @@ -179,3 +184,44 @@ __statfs_symlinks (int result, const struct statfs *fsbuf) return 1; } } + + +/* Used like: return __statfs_chown_restricted (__statfs (name, &buf), &buf);*/ +long int +__statfs_chown_restricted (int result, const struct statfs *fsbuf) +{ + if (result < 0) + { + if (errno == ENOSYS) + /* Not possible, return the default value. */ + return 1; + + /* Some error occured. */ + return -1; + } + + int fd; + long int retval = 1; + switch (fsbuf->f_type) + { + case XFS_SUPER_MAGIC: + /* Read the value from /proc/sys/fs/xfs/restrict_chown. If we cannot + read it default to assume the restriction is in place. */ + fd = open_not_cancel_2 ("/proc/sys/fs/xfs/restrict_chown", O_RDONLY); + if (fd != -1) + { + char buf[2]; + if (TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, 2)) == 2 + && buf[0] >= '0' && buf[0] <= '1') + retval = buf[0] - '0'; + + close_not_cancel_no_status (fd); + } + break; + + default: + break; + } + + return retval; +} |