selinux: generate flask headers during kernel build

[cascardo/linux.git] / scripts / selinux / genheaders / genheaders.c

diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c
new file mode 100644 (file)
index 0000000..3b16145
--- /dev/null
+++ b/scripts/selinux/genheaders/genheaders.c
@@ -0,0 +1,118 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+struct security_class_mapping {
+       const char *name;
+       const char *perms[sizeof(unsigned) * 8 + 1];
+};
+
+#include "classmap.h"
+#include "initial_sid_to_string.h"
+
+#define max(x, y) ((x > y) ? x : y)
+
+const char *progname;
+
+void usage(void)
+{
+       printf("usage: %s flask.h av_permissions.h\n", progname);
+       exit(1);
+}
+
+char *stoupperx(const char *s)
+{
+       char *s2 = strdup(s);
+       char *p;
+
+       if (!s2) {
+               fprintf(stderr, "%s:  out of memory\n", progname);
+               exit(3);
+       }
+
+       for (p = s2; *p; p++)
+               *p = toupper(*p);
+       return s2;
+}
+
+int main(int argc, char *argv[])
+{
+       int i, j, k;
+       int isids_len;
+       FILE *fout;
+
+       progname = argv[0];
+
+       if (argc < 3)
+               usage();
+
+       fout = fopen(argv[1], "w");
+       if (!fout) {
+               fprintf(stderr, "Could not open %s for writing:  %s\n",
+                       argv[1], strerror(errno));
+               exit(2);
+       }
+
+       for (i = 0; secclass_map[i].name; i++) {
+               struct security_class_mapping *map = &secclass_map[i];
+               map->name = stoupperx(map->name);
+               for (j = 0; map->perms[j]; j++)
+                       map->perms[j] = stoupperx(map->perms[j]);
+       }
+
+       isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
+       for (i = 1; i < isids_len; i++)
+               initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
+
+       fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
+       fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
+
+       for (i = 0; secclass_map[i].name; i++) {
+               struct security_class_mapping *map = &secclass_map[i];
+               fprintf(fout, "#define SECCLASS_%s", map->name);
+               for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
+                       fprintf(fout, " ");
+               fprintf(fout, "%2d\n", i+1);
+       }
+
+       fprintf(fout, "\n");
+
+       for (i = 1; i < isids_len; i++) {
+               char *s = initial_sid_to_string[i];
+               fprintf(fout, "#define SECINITSID_%s", s);
+               for (j = 0; j < max(1, 40 - strlen(s)); j++)
+                       fprintf(fout, " ");
+               fprintf(fout, "%2d\n", i);
+       }
+       fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
+       fprintf(fout, "\n#endif\n");
+       fclose(fout);
+
+       fout = fopen(argv[2], "w");
+       if (!fout) {
+               fprintf(stderr, "Could not open %s for writing:  %s\n",
+                       argv[2], strerror(errno));
+               exit(4);
+       }
+
+       fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
+       fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
+
+       for (i = 0; secclass_map[i].name; i++) {
+               struct security_class_mapping *map = &secclass_map[i];
+               for (j = 0; map->perms[j]; j++) {
+                       fprintf(fout, "#define %s__%s", map->name,
+                               map->perms[j]);
+                       for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
+                               fprintf(fout, " ");
+                       fprintf(fout, "0x%08xUL\n", (1<<j));
+               }
+       }
+
+       fprintf(fout, "\n#endif\n");
+       fclose(fout);
+       exit(0);
+}