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glibc/nss/nss_test1.c
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#include <errno.h> | |
#include <nss.h> | |
#include <pthread.h> | |
#include <string.h> | |
#define COPY_IF_ROOM(s) \ | |
({ size_t len_ = strlen (s) + 1; \ | |
char *start_ = cp; \ | |
buflen - (cp - buffer) < len_ \ | |
? NULL \ | |
: (cp = mempcpy (cp, s, len_), start_); }) | |
/* Password handling. */ | |
#include <pwd.h> | |
static struct passwd pwd_data[] = | |
{ | |
#define PWD(u) \ | |
{ .pw_name = (char *) "name" #u, .pw_passwd = (char *) "*", .pw_uid = u, \ | |
.pw_gid = 100, .pw_gecos = (char *) "*", .pw_dir = (char *) "*", \ | |
.pw_shell = (char *) "*" } | |
PWD (100), | |
PWD (30), | |
PWD (200), | |
PWD (60), | |
PWD (20000) | |
}; | |
#define npwd_data (sizeof (pwd_data) / sizeof (pwd_data[0])) | |
static size_t pwd_iter; | |
#define CURPWD pwd_data[pwd_iter] | |
static pthread_mutex_t pwd_lock = PTHREAD_MUTEX_INITIALIZER; | |
enum nss_status | |
_nss_test1_setpwent (int stayopen) | |
{ | |
pwd_iter = 0; | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_test1_endpwent (void) | |
{ | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_test1_getpwent_r (struct passwd *result, char *buffer, size_t buflen, | |
int *errnop) | |
{ | |
char *cp = buffer; | |
int res = NSS_STATUS_SUCCESS; | |
pthread_mutex_lock (&pwd_lock); | |
if (pwd_iter >= npwd_data) | |
res = NSS_STATUS_NOTFOUND; | |
else | |
{ | |
result->pw_name = COPY_IF_ROOM (CURPWD.pw_name); | |
result->pw_passwd = COPY_IF_ROOM (CURPWD.pw_passwd); | |
result->pw_uid = CURPWD.pw_uid; | |
result->pw_gid = CURPWD.pw_gid; | |
result->pw_gecos = COPY_IF_ROOM (CURPWD.pw_gecos); | |
result->pw_dir = COPY_IF_ROOM (CURPWD.pw_dir); | |
result->pw_shell = COPY_IF_ROOM (CURPWD.pw_shell); | |
if (result->pw_name == NULL || result->pw_passwd == NULL | |
|| result->pw_gecos == NULL || result->pw_dir == NULL | |
|| result->pw_shell == NULL) | |
{ | |
*errnop = ERANGE; | |
res = NSS_STATUS_TRYAGAIN; | |
} | |
++pwd_iter; | |
} | |
pthread_mutex_unlock (&pwd_lock); | |
return res; | |
} | |
enum nss_status | |
_nss_test1_getpwuid_r (uid_t uid, struct passwd *result, char *buffer, | |
size_t buflen, int *errnop) | |
{ | |
for (size_t idx = 0; idx < npwd_data; ++idx) | |
if (pwd_data[idx].pw_uid == uid) | |
{ | |
char *cp = buffer; | |
int res = NSS_STATUS_SUCCESS; | |
result->pw_name = COPY_IF_ROOM (pwd_data[idx].pw_name); | |
result->pw_passwd = COPY_IF_ROOM (pwd_data[idx].pw_passwd); | |
result->pw_uid = pwd_data[idx].pw_uid; | |
result->pw_gid = pwd_data[idx].pw_gid; | |
result->pw_gecos = COPY_IF_ROOM (pwd_data[idx].pw_gecos); | |
result->pw_dir = COPY_IF_ROOM (pwd_data[idx].pw_dir); | |
result->pw_shell = COPY_IF_ROOM (pwd_data[idx].pw_shell); | |
if (result->pw_name == NULL || result->pw_passwd == NULL | |
|| result->pw_gecos == NULL || result->pw_dir == NULL | |
|| result->pw_shell == NULL) | |
{ | |
*errnop = ERANGE; | |
res = NSS_STATUS_TRYAGAIN; | |
} | |
return res; | |
} | |
return NSS_STATUS_NOTFOUND; | |
} | |
enum nss_status | |
_nss_test1_getpwnam_r (const char *name, struct passwd *result, char *buffer, | |
size_t buflen, int *errnop) | |
{ | |
for (size_t idx = 0; idx < npwd_data; ++idx) | |
if (strcmp (pwd_data[idx].pw_name, name) == 0) | |
{ | |
char *cp = buffer; | |
int res = NSS_STATUS_SUCCESS; | |
result->pw_name = COPY_IF_ROOM (pwd_data[idx].pw_name); | |
result->pw_passwd = COPY_IF_ROOM (pwd_data[idx].pw_passwd); | |
result->pw_uid = pwd_data[idx].pw_uid; | |
result->pw_gid = pwd_data[idx].pw_gid; | |
result->pw_gecos = COPY_IF_ROOM (pwd_data[idx].pw_gecos); | |
result->pw_dir = COPY_IF_ROOM (pwd_data[idx].pw_dir); | |
result->pw_shell = COPY_IF_ROOM (pwd_data[idx].pw_shell); | |
if (result->pw_name == NULL || result->pw_passwd == NULL | |
|| result->pw_gecos == NULL || result->pw_dir == NULL | |
|| result->pw_shell == NULL) | |
{ | |
*errnop = ERANGE; | |
res = NSS_STATUS_TRYAGAIN; | |
} | |
return res; | |
} | |
return NSS_STATUS_NOTFOUND; | |
} |