crtools: use pit_t for PIDs

Here is a bit mess, because we used unsigned int instead of pid_t.
A negative value is used for uninitialized PID's variables.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -954,11 +954,11 @@ static int check_threads(const struct pstree_item *item)
 	return 0;
 }
 
-static int parse_children(int pid, u32 **_c, int *_n)
+static int parse_children(pid_t pid, pid_t **_c, int *_n)
 {
 	FILE *file;
 	char *tok;
-	u32 *ch = NULL;
+	pid_t *ch = NULL;
 	int nr = 1;
 	DIR *dir;
 	struct dirent *de;
@@ -984,7 +984,7 @@ static int parse_children(int pid, u32 **_c, int *_n)
 
 		tok = strtok(loc_buf, " \n");
 		while (tok) {
-			u32 *tmp = xrealloc(ch, nr * sizeof(u32));
+			pid_t *tmp = xrealloc(ch, nr * sizeof(pid_t));
 			if (!tmp)
 				goto err;
 			ch = tmp;
@@ -1008,7 +1008,7 @@ err:
 
 static int get_children(struct pstree_item *item)
 {
-	u32 *ch;
+	pid_t *ch;
 	int ret, i, nr_children;
 	struct pstree_item *c;
 
@@ -1150,7 +1150,7 @@ err:
 
 static int check_subtree(const struct pstree_item *item)
 {
-	u32 *ch;
+	pid_t *ch;
 	int nr, ret, i;
 	struct pstree_item *child;
 

include/crtools.h

@@ -203,8 +203,8 @@ struct rst_info {
 
 struct pid
 {
-	u32 real;		/* used to peek/poke tasks during dump stage */
-	u32 virt;		/* used all over in the images and saved after restore */
+	pid_t real;		/* used to peek/poke tasks during dump stage */
+	pid_t virt;		/* used all over in the images and saved after restore */
 };
 
 static inline int in_vma_area(struct vma_area *vma, unsigned long addr)

include/parasite-syscall.h

@@ -35,7 +35,7 @@ extern int parasite_dump_pages_seized(struct parasite_ctl *ctl,
 				      struct cr_fdset *cr_fdset);
 struct parasite_dump_tid_info;
 extern int parasite_dump_thread_seized(struct parasite_ctl *ctl, pid_t pid,
-					unsigned int **tid_add, u32 *tid);
+					unsigned int **tid_add, pid_t *tid);
 
 struct parasite_drain_fd;
 struct fd_opts;

parasite-syscall.c

@@ -435,7 +435,7 @@ err:
 }
 
 int parasite_dump_thread_seized(struct parasite_ctl *ctl, pid_t pid,
-					unsigned int **tid_addr, u32 *tid)
+					unsigned int **tid_addr, pid_t *tid)
 {
 	struct parasite_dump_tid_info args = { };
 	int ret;