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