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Add support for detecting busy subordinate user ids

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Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2013-01-22 01:17:50 -08:00 committed by Serge Hallyn
parent 87253ca906
commit 89f7b0868c
1 changed files with 13 additions and 5 deletions
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18
libmisc/user_busy.c
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@ -38,11 +38,13 @@
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include "defines.h"
#include "prototypes.h"
#include "subordinateio.h"
#ifdef __linux__
static int check_status (const char *sname, uid_t uid);
static int check_status (const char *name, const char *sname, uid_t uid);
static int user_busy_processes (const char *name, uid_t uid);
#else /* !__linux__ */
static int user_busy_utmp (const char *name);
@ -102,7 +104,7 @@ static int user_busy_utmp (const char *name)
#endif /* !__linux__ */
#ifdef __linux__
static int check_status (const char *sname, uid_t uid)
static int check_status (const char *name, const char *sname, uid_t uid)
{
/* 40: /proc/xxxxxxxxxx/task/xxxxxxxxxx/status + \0 */
char status[40];
@ -125,7 +127,10 @@ static int check_status (const char *sname, uid_t uid)
&ruid, &euid, &suid) == 3) {
if ( (ruid == (unsigned long) uid)
|| (euid == (unsigned long) uid)
|| (suid == (unsigned long) uid)) {
|| (suid == (unsigned long) uid)
|| have_sub_uids(name, ruid, 1)
|| have_sub_uids(name, euid, 1)
|| have_sub_uids(name, suid, 1)) {
(void) fclose (sfile);
return 1;
}
@ -153,6 +158,8 @@ static int user_busy_processes (const char *name, uid_t uid)
struct stat sbroot;
struct stat sbroot_process;
sub_uid_open (O_RDONLY);
proc = opendir ("/proc");
if (proc == NULL) {
perror ("opendir /proc");
@ -196,7 +203,7 @@ static int user_busy_processes (const char *name, uid_t uid)
continue;
}
if (check_status (tmp_d_name, uid) != 0) {
if (check_status (name, tmp_d_name, uid) != 0) {
(void) closedir (proc);
fprintf (stderr,
_("%s: user %s is currently used by process %d\n"),
@ -216,7 +223,7 @@ static int user_busy_processes (const char *name, uid_t uid)
if (tid == pid) {
continue;
}
if (check_status (task_path+6, uid) != 0) {
if (check_status (name, task_path+6, uid) != 0) {
(void) closedir (proc);
fprintf (stderr,
_("%s: user %s is currently used by process %d\n"),
@ -231,6 +238,7 @@ static int user_busy_processes (const char *name, uid_t uid)
}
(void) closedir (proc);
sub_uid_close();
return 0;
}
#endif /* __linux__ */