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| | #include "compat-util.h"
static void mincore_stats(const char *path)
{
struct stat sb;
char *map;
unsigned char *vec;
size_t vec_len;
size_t map_len;
int fd;
size_t i;
if ((fd = open(path, O_RDONLY)) < 0) {
fprintf(stderr, "%s: open(): %s\n", path, strerror(errno));
return;
}
if (fstat(fd, &sb) < 0) {
fprintf(stderr, "%s: fstat(%d): %s\n",
path, fd, strerror(errno));
goto err_close;
}
vec_len = (sb.st_size + page_size() - 1) / page_size();
if (!(vec = malloc(vec_len))) {
fprintf(stderr, "%s: malloc(%lu): %s\n",
path, (unsigned long)vec_len, strerror(errno));
goto err_close;
}
map_len = PAGE_ALIGN(sb.st_size);
if (!(map = mmap(NULL, map_len, PROT_READ, MAP_SHARED, fd, 0))) {
fprintf(stderr, "%s: mmap(%lu): %s\n",
path, (unsigned long)vec_len, strerror(errno));
goto err_free;
}
if (mincore(map, map_len, vec) < 0) {
fprintf(stderr, "%s: mincore(%lu): %s\n",
path, (unsigned long)vec_len, strerror(errno));
goto err_munmap;
}
for (i = 0; i < vec_len; ++i)
printf("%s: [%08lu] %x\n",
path, (unsigned long)i,
(vec[i]));
err_munmap:
munmap(map, map_len);
err_free:
free(vec);
err_close:
close(fd);
}
int main(int argc, char * const argv[])
{
int i;
for (i = 1; i < argc; ++i)
mincore_stats(argv[i]);
return 0;
}
|