getaccess.2 (2010 09)

getaccess(2) getaccess(2)

[ENOENT] The named ﬁle does not exist (for example, path is null or a component of

path does not exist).

[ENOTDIR] A component of the path preﬁx is not a directory.

[EOPNOTSUPP]

getaccess() is not supported on some types of remote ﬁles.

EXAMPLES

The following call determines the caller’s effective access rights to ﬁle

test and succeeds if the user has

read access:

#include <unistd.h>

#include <sys/getaccess.h>

int mode;

mode = getaccess ("test", UID_EUID, NGROUPS_EGID_SUPP,

(int *) 0, (void *) 0, (void *) 0);

if ((mode >= 0) && (mode & R_OK)) ...

Here is one way to test access rights to ﬁle

/tmp/hold for user ID 23, group ID 109:

int gid = 109;

int mode;

mode = getaccess ("/tmp/hold", 23, 1, & gid,

(void *) 0, (void *) 0);

Should the need arise, the following code builds a gidset that includes the process’s effective group ID:

#include <sys/types.h>

#include <unistd.h>

gid_t *gidset;

int ngroups;

int ngroups_max;

ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;

gidset = (gid_t *)malloc(ngroups_max * sizeof(gid_t));

gidset[0] = getegid();

ngroups = 1 + getgroups (ngroups_max - 1, &gidset[1]);

AUTHOR

getaccess() was developed by HP.