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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 "selinux_internal.h"
| #include "policy.h"
| #include <limits.h>
|
| int security_canonicalize_context_raw(const char * con,
| char ** canoncon)
| {
| char path[PATH_MAX];
| char *buf;
| size_t size;
| int fd, ret;
|
| if (!selinux_mnt) {
| errno = ENOENT;
| return -1;
| }
|
| snprintf(path, sizeof path, "%s/context", 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;
| }
| strncpy(buf, con, size);
|
| ret = write(fd, buf, strlen(buf) + 1);
| if (ret < 0)
| goto out2;
|
| memset(buf, 0, size);
| ret = read(fd, buf, size - 1);
| if (ret < 0 && errno == EINVAL) {
| /* Fall back to the original context for kernels
| that do not support the extended interface. */
| strncpy(buf, con, size);
| }
|
| *canoncon = strdup(buf);
| if (!(*canoncon)) {
| ret = -1;
| goto out2;
| }
| ret = 0;
| out2:
| free(buf);
| out:
| close(fd);
| return ret;
| }
|
| hidden_def(security_canonicalize_context_raw)
|
| int security_canonicalize_context(const char * con,
| char ** canoncon)
| {
| int ret;
| char * rcon;
| char * rcanoncon;
|
| if (selinux_trans_to_raw_context(con, &rcon))
| return -1;
|
| ret = security_canonicalize_context_raw(rcon, &rcanoncon);
|
| freecon(rcon);
| if (!ret) {
| ret = selinux_raw_to_trans_context(rcanoncon, canoncon);
| freecon(rcanoncon);
| }
|
| return ret;
| }
|
| hidden_def(security_canonicalize_context)
|
|
