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/*
* Copyright (c) 1997-8,2020 Andrew G. Morgan <morgan@kernel.org>
*
* This is a file to make the capability <-> string mappings for
* libcap.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
* #include 'sed' generated array
*/
struct {
const char *name;
int index;
} const list[] = {
#include "cap_names.list.h"
{NULL, -1}
};
/*
* recalloc uses realloc to grow some memory but it resets the
* indicated extended empty space.
*/
static void *recalloc(void *p, int was, int is) {
void *n = realloc(p, is);
if (!n) {
fputs("out of memory", stderr);
exit(1);
}
memset(n+was, 0, is-was);
return n;
}
int main(void)
{
int i, maxcaps=0, maxlength=0;
const char **pointers = NULL;
int pointers_avail = 0;
for ( i=0; list[i].index >= 0 && list[i].name; ++i ) {
if (maxcaps <= list[i].index) {
maxcaps = list[i].index + 1;
}
if (pointers == NULL || list[i].index >= pointers_avail) {
int was = pointers_avail * sizeof(char *);
pointers_avail = 2 * list[i].index + 1;
pointers = recalloc(pointers, was, pointers_avail * sizeof(char *));
if (pointers == NULL) {
perror("unable to continue");
exit(1);
}
}
pointers[list[i].index] = list[i].name;
int n = strlen(list[i].name);
if (n > maxlength) {
maxlength = n;
}
}
printf("/*\n"
" * DO NOT EDIT: this file is generated automatically from\n"
" *\n"
" * <uapi/linux/capability.h>\n"
" */\n\n"
"#define __CAP_BITS %d\n"
"#define __CAP_NAME_SIZE %d\n"
"\n"
"#ifdef LIBCAP_PLEASE_INCLUDE_ARRAY\n"
"#define LIBCAP_CAP_NAMES { \\\n", maxcaps, maxlength+1);
for (i=0; i<maxcaps; ++i) {
if (pointers[i]) {
printf(" /* %d */\t\"%s\", \\\n", i, pointers[i]);
} else {
printf(" /* %d */\tNULL,\t\t/* - presently unused */ \\\n", i);
}
}
printf(" }\n"
"#endif /* LIBCAP_PLEASE_INCLUDE_ARRAY */\n"
"\n"
"/* END OF FILE */\n");
free(pointers);
exit(0);
}
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