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| #include <unistd.h>
| #include <sys/types.h>
| #include <fcntl.h>
| #include <stdlib.h>
| #include <stdio.h>
| #include <errno.h>
| #include <string.h>
| #include <limits.h>
| #include "selinux_internal.h"
| #include "policy.h"
| #include "mapping.h"
|
| int security_compute_member_raw(const char * scon,
| const char * tcon,
| security_class_t tclass,
| char ** newcon)
| {
| char path[PATH_MAX];
| char *buf;
| size_t size;
| int fd, ret;
|
| if (!selinux_mnt) {
| errno = ENOENT;
| return -1;
| }
|
| snprintf(path, sizeof path, "%s/member", selinux_mnt);
| fd = open(path, O_RDWR | O_CLOEXEC);
| if (fd < 0)
| return -1;
|
| size = selinux_page_size;
| buf = malloc(size);
| if (!buf) {
| ret = -1;
| goto out;
| }
| snprintf(buf, size, "%s %s %hu", scon, tcon, unmap_class(tclass));
|
| ret = write(fd, buf, strlen(buf));
| if (ret < 0)
| goto out2;
|
| memset(buf, 0, size);
| ret = read(fd, buf, size - 1);
| if (ret < 0)
| goto out2;
|
| *newcon = strdup(buf);
| if (!(*newcon)) {
| ret = -1;
| goto out2;
| }
| ret = 0;
| out2:
| free(buf);
| out:
| close(fd);
| return ret;
| }
|
| hidden_def(security_compute_member_raw)
|
| int security_compute_member(const char * scon,
| const char * tcon,
| security_class_t tclass,
| char ** newcon)
| {
| int ret;
| char * rscon;
| char * rtcon;
| char * rnewcon;
|
| if (selinux_trans_to_raw_context(scon, &rscon))
| return -1;
| if (selinux_trans_to_raw_context(tcon, &rtcon)) {
| freecon(rscon);
| return -1;
| }
|
| ret = security_compute_member_raw(rscon, rtcon, tclass, &rnewcon);
|
| freecon(rscon);
| freecon(rtcon);
| if (!ret) {
| if (selinux_raw_to_trans_context(rnewcon, newcon)) {
| *newcon = NULL;
| ret = -1;
| }
| freecon(rnewcon);
| }
|
| return ret;
| }
|
|
