Hi All,
Found a problem as follows:
Running a scan record on a vxWorks IOC and when entering 'File system' in scan_saveData.adl screen, an error message in the 'Save status' field follows:
"RW permission denied !!!"
At first I suspected NFS but after checking it found that my problem was in the sscan's saveData.c and/or VxWorks is 6.9
Tried two versions of sscan, 2-6-6 and 2-8-2, they gave the same result as above. These two versions are same regarding the
saveData.c and its function
checkRWpermission(char* path)
and specifically the line
file= creat(tmpfile, O_RDWR);
that creates test file "rix_" with file permissions 002 (because O_RDRW = 2)
(O_RDRW is flag "Open for reading and writing" or File Access Options)
The file permissions 002 become
-------w- in terms of rwxrwxrwx
and hence the error "RW permission denied !!!"
Found a solution by using vxWorks function open() instead of creat().
open() - opens a file and optionally creates a file if it does not exist.
open() - also offers a parameter for "mode" i.e. file permissions, which i set to 0x666 in the example below
file = open (tmpfile, O_CREAT | O_RDWR, 0666);
Then scan data can be saved as expected.
BTW
saveData.c uses open() for creating 'subdirectory'.
fd = open (local_pathname, O_RDWR | O_CREAT,
FSTAT_DIR | DEFAULT_DIR_PERM | 0775);
Has anyone had similar problems ?
Is this an sscan/saveData.c issue or vxWorks 6.9 issue (I do not have any other version of vxWorks) ?
How about sscan/saveData on OS's other than vxWorks?
Thanks Vesna
P.S.
In my vxWorks 6.9 and its ioLib.c, creat() does not offer file permissions (set to 0 as below):
int creat
(
const char *name, /* name of the file to create */
int flag /* file permissions */
)
{
return (ioCreateOrOpen (name, flag, 0, TRUE));
}
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