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mkswap: selinux support by KaiGai Kohei <kaigai@ak.jp.nec.com>

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This commit is contained in:
Denis Vlasenko 2007-10-19 21:49:48 +00:00
parent 1a7afb48da
commit 85ff862753
1 changed files with 44 additions and 1 deletions
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45
util-linux/mkswap.c
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@ -8,6 +8,48 @@
#include "libbb.h"
#if ENABLE_SELINUX
static void mkswap_selinux_setcontext(int fd, const char *path)
{
struct stat stbuf;
if (!is_selinux_enabled())
return;
if (fstat(fd, &stbuf) < 0)
bb_perror_msg_and_die("fstat failed");
if (S_ISREG(stbuf.st_mode)) {
security_context_t newcon;
security_context_t oldcon = NULL;
context_t context;
if (fgetfilecon_raw(fd, &oldcon) < 0) {
if (errno != ENODATA)
goto error;
if (matchpathcon(path, stbuf.st_mode, &oldcon) < 0)
goto error;
}
context = context_new(oldcon);
if (!context || context_type_set(context, "swapfile_t"))
goto error;
newcon = context_str(context);
if (!newcon)
goto error;
if (strcmp(oldcon, newcon) != 0 && fsetfilecon_raw(fd, newcon) < 0)
goto error;
if (ENABLE_FEATURE_CLEAN_UP) {
context_free(context);
freecon(oldcon);
}
}
return;
error:
bb_perror_msg_and_die("SELinux relabeling failed");
}
#else
#define mkswap_selinux_setcontext(fd, path) ((void)0)
#endif
int mkswap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int mkswap_main(int argc, char **argv)
{
@ -26,6 +68,7 @@ int mkswap_main(int argc, char **argv)
pagesize = getpagesize();
printf("Setting up swapspace version 1, size = %"OFF_FMT"d bytes\n",
len - pagesize);
mkswap_selinux_setcontext(fd, argv[1]);
// Make a header.
@ -38,7 +81,7 @@ int mkswap_main(int argc, char **argv)
xlseek(fd, 1024, SEEK_SET);
xwrite(fd, hdr, sizeof(hdr));
xlseek(fd, pagesize-10, SEEK_SET);
xlseek(fd, pagesize - 10, SEEK_SET);
xwrite(fd, "SWAPSPACE2", 10);
fsync(fd);