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/*
* Example code to show how to copy the security context from one file to
* another.
*/
#include "types.h"
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
static int selinux_enabled = -1;
#endif
int
copy_security_context(const char *from_file, const char *to_file)
{
int status = 0;
#ifdef WITH_SELINUX
security_context_t from_context;
security_context_t to_context;
if (selinux_enabled == -1)
selinux_enabled = (is_selinux_enabled() > 0);
if (!selinux_enabled)
return 0;
if (getfilecon(from_file, &from_context) < 0) {
/*
* If the filesystem doesn't support extended
* attributes, the original had no special security
* context and the target cannot have one either.
*/
if (errno == EOPNOTSUPP)
return 0;
error(0, errno, (char *)joe_gettext(_("Could not get security context for %s")),
from_file);
return 1;
}
if (getfilecon(to_file, &to_context) < 0) {
MSG_PUTS(_(joe_gettext(_("\nCould not get security context for "))));
msg_outtrans(to_file);
msg_putchar('\n');
freecon(from_context);
return 1;
}
if (zcmp(from_context, to_context) != 0) {
if (setfilecon(to_file, from_context) < 0) {
error(0, errno,
(char *)joe_gettext(_("Could not set security context for %s")),
to_file);
status = 1;
}
}
freecon(to_context);
freecon(from_context);
#endif
return status;
}
int
match_default_security_context(const char *from_file)
{
#ifdef WITH_SELINUX
security_context_t scontext;
if (selinux_enabled == -1)
selinux_enabled = (is_selinux_enabled() > 0);
if (!selinux_enabled)
return 0;
if (getfilecon(from_file, &scontext) < 0) {
/*
* If the filesystem doesn't support extended
* attributes, the original had no special security
* context and the target cannot have one either.
*/
if (errno == EOPNOTSUPP)
return 0;
error(0, errno, (char *)joe_gettext(_("Could not get security context for %s")),
from_file);
return 1;
}
if (setfscreatecon(scontext) < 0) {
error(0, errno,
(char *)joe_gettext(_("Could not set default security context for %s")),
from_file);
freecon(scontext);
return 1;
}
freecon(scontext);
#endif
return 0;
}
int
reset_default_security_context()
{
#ifdef WITH_SELINUX
if (selinux_enabled == -1)
selinux_enabled = (is_selinux_enabled() > 0);
if (!selinux_enabled)
return 0;
if (setfscreatecon(0) < 0) {
error(0, errno, (char *)joe_gettext(_("Could not reset default security context")));
return 1;
}
#endif
return 0;
}
int
output_security_context(char *from_file)
{
#ifdef WITH_SELINUX
security_context_t scontext;
if (selinux_enabled == -1)
selinux_enabled = (is_selinux_enabled() > 0);
if (!selinux_enabled)
return 0;
if (getfilecon(from_file, &scontext) < 0) {
/*
* If the filesystem doesn't support extended
* attributes, the original had no special security
* context and the target cannot have one either.
*/
if (errno == EOPNOTSUPP)
return 0;
error(0, errno,(char *)joe_gettext(_("Could not get security context for %s")),
from_file);
return 1;
}
error(0, 0, (char *)joe_gettext(_("%s Security Context %s")), from_file, scontext);
freecon(scontext);
#endif
return 0;
}
#if 0
/*
Test program compile using the following command
cc -o t t.c -DWITH_SELINUX -DTEST -lselinux
*/
#include <stdio.h>
#include <stdlib.h>
main(int argc, char **argv)
{
printf("%d: %s\n", argc, argv[1]);
if (argc == 3) {
copy_security_context(argv[1], argv[2]);
output_security_context(argv[2]);
}
if (argc == 2) {
FILE *fd;
char *temp;
match_default_security_context(argv[1]);
mkstemp(temp);
printf("temp=%s", temp);
fd = fopen(temp, "w");
fclose(fd);
output_security_context(temp);
reset_default_security_context();
}
}
#endif
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