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process_maps.c
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process_maps.c
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#include "process_maps.h"
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void process_maps_perms_str(unsigned char perms, char* outbuf5) {
unsigned i = 0;
if(perms & MDP_R)
outbuf5[i++] = 'r';
else
outbuf5[i++] = '-';
if(perms & MDP_W)
outbuf5[i++] = 'w';
else
outbuf5[i++] = '-';
if(perms & MDP_X)
outbuf5[i++] = 'x';
else
outbuf5[i++] = '-';
if(perms & MDP_P)
outbuf5[i++] = 'p';
else if(perms & MDP_S)
outbuf5[i++] = 's';
else
outbuf5[i++] = '-';
outbuf5[i] = 0;
}
size_t process_map_size(map_data* map) {
return (uintptr_t) map->address.end - (uintptr_t) map->address.start;
}
map_data* find_map_for_addr(sblist* maps, void* addr) {
map_data* map;
sblist_iter(maps, map) {
if((uintptr_t) addr >= (uintptr_t) map->address.start && (uintptr_t) addr <= (uintptr_t) map->address.end)
return map;
}
return NULL;
}
sblist* process_maps_get(pid_t pid) {
char fnbuf[64];
char linebuf[4096 + 1024];
sblist* result;
map_data current;
char *p, *p2;
snprintf(fnbuf, sizeof(fnbuf), "/proc/%d/maps", (int) pid);
FILE* f = fopen(fnbuf, "r");
if(!f) {
perror("fopen");
return NULL;
}
result = sblist_new(sizeof(map_data), 16);
while((p = fgets(linebuf, sizeof(linebuf), f))) {
memset(¤t, 0, sizeof(map_data));
current.address.start = (void*) (intptr_t) strtol(p, &p2, 16);
p = ++p2;
current.address.end = (void*) (intptr_t) strtol(p, &p2, 16);
p = ++p2;
if(*(p++) == 'r') current.perms |= MDP_R;
if(*(p++) == 'w') current.perms |= MDP_W;
if(*(p++) == 'x') current.perms |= MDP_X;
if(*p == 'p') current.perms |= MDP_P;
if(*p == 's') current.perms |= MDP_S;
p++; p++;
current.offset = (uint64_t) strtoll(p, &p2, 16);
p = ++p2;
current.dev.major = strtol(p, &p2, 16);
p = ++p2;
current.dev.minor = strtol(p, &p2, 16);
p = ++p2;
current.inode = strtoll(p, &p2, 10);
p = ++p2;
while(*p == ' ') ++p;
if(*p != '\n') {
p2 = p;
while(*p2 != '\n') p2++;
*p2 = 0;
current.pathname = strdup(p);
}
sblist_add(result, ¤t);
}
fclose(f);
return result;
}
void process_maps_free(sblist* maps) {
map_data* map;
sblist_iter(maps, map) {
if(map->pathname) free(map->pathname);
}
sblist_free(maps);
}