{
int fd, found = 0, len, ret = -1;
char *ptr, *p;
+ unsigned int search_space;
- if (argc != 3) {
- fprintf(stderr, "Usage: %s <file> <cmdline>\n", argv[0]);
+ if (argc <= 2 || argc > 4) {
+ fprintf(stderr, "Usage: %s <file> <cmdline> [size]\n", argv[0]);
goto err1;
+ } else if (argc == 3) {
+ fprintf(stdout, "search space used is default of 16KB\n");
+ search_space = SEARCH_SPACE;
+ } else {
+ search_space = atoi(argv[3]);
}
len = strlen(argv[2]);
if (len + 9 > CMDLINE_MAX) {
}
if (((fd = open(argv[1], O_RDWR)) < 0) ||
- (ptr = (char *) mmap(0, SEARCH_SPACE + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
+ (ptr = (char *) mmap(0, search_space + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
fprintf(stderr, "Could not open kernel image");
goto err2;
}
- for (p = ptr; p < (ptr + SEARCH_SPACE); p += 4) {
+ for (p = ptr; p < (ptr + search_space); p += 4) {
if (memcmp(p, "CMDLINE:", 8) == 0) {
found = 1;
p += 8;