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Compute sun_path from PID

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Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>
This commit is contained in:
Adrien Gallouët
2019-04-02 13:51:15 +00:00
parent 568eeee70b
commit d703a66988
1 changed files with 10 additions and 12 deletions
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22
src/ctl.c
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@@ -2,15 +2,13 @@
#include "ctl.h"
#include "str.h"
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/un.h>
#define CTL_BIND_MAX 64
int
ctl_reply(int fd, struct ctl_msg *res, struct ctl_msg *req)
{
@@ -61,20 +59,20 @@ ctl_setsun(struct sockaddr_un *dst, const char *dir, const char *file)
static int
ctl_bind(int fd, const char *dir, const char *file)
{
char tmp[32];
struct sockaddr_un sun;
if (str_empty(file)) {
for (int i = 0; i < CTL_BIND_MAX; i++) {
if (snprintf(tmp, sizeof(tmp), ".%i", i) >= sizeof(tmp))
return -1;
char name[10] = { [0] = '.' };
unsigned pid = (unsigned)getpid();
if (ctl_setsun(&sun, dir, tmp))
return -1;
for (size_t i = 1; i < sizeof(name) - 1; i++, pid >>= 4)
name[i] = "uncopyrightables"[pid & 15];
if (!bind(fd, (struct sockaddr *)&sun, sizeof(sun)))
return 0;
}
if (ctl_setsun(&sun, dir, name))
return -1;
if (!bind(fd, (struct sockaddr *)&sun, sizeof(sun)))
return 0;
} else {
if (ctl_setsun(&sun, dir, file))
return -1;