Rudiments
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Static Public Member Functions | |
static bool | setFilePermissions (const char *filename, mode_t perms) |
static bool | setFilePermissions (int32_t fd, mode_t perms) |
static mode_t | evalPermString (const char *permstring) |
static char * | evalPermOctal (mode_t mode) |
static mode_t | everyoneReadWrite () |
static mode_t | everyoneReadWriteExecute () |
static mode_t | ownerRead () |
static mode_t | ownerWrite () |
static mode_t | ownerExecute () |
static mode_t | ownerReadWrite () |
static mode_t | ownerReadExecute () |
static mode_t | ownerReadWriteExecute () |
static mode_t | groupRead () |
static mode_t | groupWrite () |
static mode_t | groupExecute () |
static mode_t | groupReadWrite () |
static mode_t | groupReadExecute () |
static mode_t | groupReadWriteExecute () |
static mode_t | othersRead () |
static mode_t | othersWrite () |
static mode_t | othersExecute () |
static mode_t | othersReadWrite () |
static mode_t | othersReadExecute () |
static mode_t | othersReadWriteExecute () |
static mode_t | saveInSwapSpace () |
static mode_t | setUserId () |
static mode_t | setGroupId () |
Permissions are access priveleges. Files, directories, semaphores and shared memory segments all have permissions associated with them.
There are 3 types of permissions: read, write and execute.
These permissions can be granted to:
The execute permission has 2 modifications which can be applied to it:
The "sticky bit" may also be set on platforms that support it. When set, the file is saved in the system's swap space. As a side-effect, it cannot be deleted by a user other than the one that created it.
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The inverse of evalPermString(). Evaluates "mode" and returns a string representing the permissions.
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Return a permission defined in "permstring".
"permstring" should be the same format as displayed by the "ls -l" command.
The first 3 characters set permissions for the owner. The next 3 characters set permissions for the group. The next 3 characters set permissions for all others.
For example: rwxr-xr-x : read/execute for everyone and write for the owner rw-rw-r– : read for everyone and write for the owner and owner's group rw-r–r– : read for everyone and write for the owner rwsr-sr-x : read/execute for everyone, write for the owner and run as the user/group that owns the file rw-rw-rwt : read/write for everyone, and save the file in swap space
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Returns rw-rw-rw- (666) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns rwxrwxrwx (777) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns --—x— (010) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns —r--— (040) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns —r-x— (050) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns —rw-— (060) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns —rwx— (070) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns -—w-— (020) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns -----—x (001) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns ---—r– (004) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns ---—r-x (005) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns ---—rw- (006) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns ---—rwx (007) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns ----—w- (002) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns –x---— (100) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns r-----— (400) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns r-x---— (500) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns rw----— (600) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns rwx---— (700) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns -w----— (200) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns -----—t permissions.
May be or'ed together with the result of another method to define a permission.
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Set the permissions on "filename" to "perms".
Returns true on success and false on failure.
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Set the permissions on the file associated with file descriptor "fd" to "perms".
Returns true on success and false on failure.
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Returns --—s— (g+s) permissions.
May be or'ed together with the result of another method to define a permission.
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Returns –s---— (u+s) permissions.
May be or'ed together with the result of another method to define a permission.