summaryrefslogtreecommitdiff
path: root/nis/nss_compat/compat-pwd.c
diff options
context:
space:
mode:
Diffstat (limited to 'nis/nss_compat/compat-pwd.c')
-rw-r--r--nis/nss_compat/compat-pwd.c526
1 files changed, 469 insertions, 57 deletions
diff --git a/nis/nss_compat/compat-pwd.c b/nis/nss_compat/compat-pwd.c
index 681258d2e6..0216522d36 100644
--- a/nis/nss_compat/compat-pwd.c
+++ b/nis/nss_compat/compat-pwd.c
@@ -30,6 +30,10 @@
#include <rpcsvc/nis.h>
#include <nsswitch.h>
+/* Comment out the following line for the production version. */
+/* #define NDEBUG 1 */
+#include <assert.h>
+
#include "netgroup.h"
#include "nss-nisplus.h"
#include "nisplus-parser.h"
@@ -43,7 +47,7 @@ static size_t pwdtablelen = 0;
#define ENTNAME pwent
#define STRUCTURE passwd
#define EXTERN_PARSER
-#include "../../nss/nss_files/files-parse.c"
+#include <nss/nss_files/files-parse.c>
/* Structure for remembering -@netgroup and -user members ... */
#define BLACKLIST_INITIAL_SIZE 512
@@ -211,15 +215,22 @@ internal_setpwent (ent_t *ent)
if (pwdtable == NULL)
{
- char buf [20 + strlen (nis_local_directory ())];
- char *p;
+ static const char key[] = "passwd.org_dir.";
+ const char *local_dir = nis_local_directory ();
+ size_t len_local_dir = strlen (local_dir);
- p = stpcpy (buf, "passwd.org_dir.");
- p = stpcpy (p, nis_local_directory ());
- pwdtable = strdup (buf);
+ pwdtable = malloc (sizeof (key) + len_local_dir);
if (pwdtable == NULL)
- return NSS_STATUS_TRYAGAIN;
- pwdtablelen = strlen (pwdtable);
+ return NSS_STATUS_TRYAGAIN;
+
+ pwdtablelen = ((char *) mempcpy (mempcpy (pwdtable,
+ key, sizeof (key) - 1),
+ local_dir, len_local_dir + 1)
+ - pwdtable) - 1;
+
+ /* *Maybe* (I'm no NIS expert) we have to duplicate the `local_dir'
+ value since it might change during our work. So add a test here. */
+ assert (pwdtablelen == sizeof (key) + len_local_dir);
}
ent->blacklist.current = 0;
@@ -334,8 +345,8 @@ _nss_compat_endpwent (void)
}
static enum nss_status
-getpwent_next_nis_netgr (struct passwd *result, ent_t *ent, char *group,
- char *buffer, size_t buflen)
+getpwent_next_nis_netgr (const char *name, struct passwd *result, ent_t *ent,
+ char *group, char *buffer, size_t buflen)
{
struct parser_data *data = (void *) buffer;
char *ypdomain, *host, *user, *domain, *outval, *p, *p2;
@@ -379,6 +390,11 @@ getpwent_next_nis_netgr (struct passwd *result, ent_t *ent, char *group,
if (domain != NULL && strcmp (ypdomain, domain) != 0)
continue;
+ /* If name != NULL, we are called from getpwnam */
+ if (name != NULL)
+ if (strcmp (user, name) != 0)
+ continue;
+
if (yp_match (ypdomain, "passwd.byname", user,
strlen (user), &outval, &outvallen)
!= YPERR_SUCCESS)
@@ -404,6 +420,9 @@ getpwent_next_nis_netgr (struct passwd *result, ent_t *ent, char *group,
if (parse_res)
{
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ blacklist_store_name (result->pw_name, ent);
copy_pwd_changes (result, &ent->pwd, p2, p2len);
break;
}
@@ -413,8 +432,9 @@ getpwent_next_nis_netgr (struct passwd *result, ent_t *ent, char *group,
}
static enum nss_status
-getpwent_next_nisplus_netgr (struct passwd *result, ent_t *ent, char *group,
- char *buffer, size_t buflen)
+getpwent_next_nisplus_netgr (const char *name, struct passwd *result,
+ ent_t *ent, char *group, char *buffer,
+ size_t buflen)
{
char *ypdomain, *host, *user, *domain, *p2;
int status, parse_res;
@@ -459,6 +479,11 @@ getpwent_next_nisplus_netgr (struct passwd *result, ent_t *ent, char *group,
if (domain != NULL && strcmp (ypdomain, domain) != 0)
continue;
+ /* If name != NULL, we are called from getpwnam */
+ if (name != NULL)
+ if (strcmp (user, name) != 0)
+ continue;
+
p2len = pwd_need_buflen (&ent->pwd);
if (p2len > buflen)
{
@@ -488,6 +513,9 @@ getpwent_next_nisplus_netgr (struct passwd *result, ent_t *ent, char *group,
if (parse_res)
{
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ blacklist_store_name (result->pw_name, ent);
copy_pwd_changes (result, &ent->pwd, p2, p2len);
break;
}
@@ -497,16 +525,6 @@ getpwent_next_nisplus_netgr (struct passwd *result, ent_t *ent, char *group,
}
static enum nss_status
-getpwent_next_netgr (struct passwd *result, ent_t *ent, char *group,
- char *buffer, size_t buflen)
-{
- if (use_nisplus)
- return getpwent_next_nisplus_netgr (result, ent, group, buffer, buflen);
- else
- return getpwent_next_nis_netgr (result, ent, group, buffer, buflen);
-}
-
-static enum nss_status
getpwent_next_nisplus (struct passwd *result, ent_t *ent, char *buffer,
size_t buflen)
{
@@ -683,8 +701,8 @@ getpwent_next_nis (struct passwd *result, ent_t *ent, char *buffer,
/* This function handle the +user entrys in /etc/passwd */
static enum nss_status
-getpwent_next_file_plususer (struct passwd *result, char *buffer,
- size_t buflen)
+getpwnam_plususer (const char *name, struct passwd *result, char *buffer,
+ size_t buflen)
{
struct parser_data *data = (void *) buffer;
struct passwd pwd;
@@ -708,9 +726,9 @@ getpwent_next_file_plususer (struct passwd *result, char *buffer,
if (use_nisplus) /* Do the NIS+ query here */
{
nis_result *res;
- char buf[strlen (result->pw_name) + 24 + pwdtablelen];
+ char buf[strlen (name) + 24 + pwdtablelen];
- sprintf(buf, "[name=%s],%s", &result->pw_name[1], pwdtable);
+ sprintf(buf, "[name=%s],%s", name, pwdtable);
res = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
{
@@ -730,23 +748,24 @@ getpwent_next_file_plususer (struct passwd *result, char *buffer,
}
else /* Use NIS */
{
- char *domain;
- char *outval;
+ char *domain, *outval, *ptr;
int outvallen;
if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
return NSS_STATUS_TRYAGAIN;
- if (yp_match (domain, "passwd.byname", &result->pw_name[1],
- strlen (result->pw_name) - 1, &outval, &outvallen)
+ if (yp_match (domain, "passwd.byname", name, strlen (name),
+ &outval, &outvallen)
!= YPERR_SUCCESS)
return NSS_STATUS_TRYAGAIN;
- p = strncpy (buffer, outval,
- buflen < (size_t) outvallen ? buflen : (size_t) outvallen);
+ ptr = strncpy (buffer, outval, buflen < (size_t) outvallen ?
+ buflen : (size_t) outvallen);
+ buffer[buflen < (size_t) outvallen ? buflen : (size_t) outvallen] = '\0';
free (outval);
- while (isspace (*p))
- p++;
- if ((parse_res = _nss_files_parse_pwent (p, result, data, buflen)) == -1)
+ while (isspace (*ptr))
+ ptr++;
+ if ((parse_res = _nss_files_parse_pwent (ptr, result, data, buflen))
+ == -1)
{
__set_errno (ERANGE);
return NSS_STATUS_TRYAGAIN;
@@ -841,8 +860,14 @@ getpwent_next_file (struct passwd *result, ent_t *ent,
ent->first = TRUE;
copy_pwd_changes (&ent->pwd, result, NULL, 0);
- status = getpwent_next_netgr (result, ent, &result->pw_name[2],
- buffer, buflen);
+ if (use_nisplus)
+ status = getpwent_next_nisplus_netgr (NULL, result, ent,
+ &result->pw_name[2],
+ buffer, buflen);
+ else
+ status = getpwent_next_nis_netgr (NULL, result, ent,
+ &result->pw_name[2],
+ buffer, buflen);
if (status == NSS_STATUS_RETURN)
continue;
else
@@ -863,7 +888,11 @@ getpwent_next_file (struct passwd *result, ent_t *ent,
{
enum nss_status status;
- status = getpwent_next_file_plususer (result, buffer, buflen);
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ blacklist_store_name (&result->pw_name[1], ent);
+ status = getpwnam_plususer (&result->pw_name[1], result, buffer,
+ buflen);
if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
break;
else
@@ -901,26 +930,30 @@ internal_getpwent_r (struct passwd *pw, ent_t *ent, char *buffer,
/* We are searching members in a netgroup */
/* Since this is not the first call, we don't need the group name */
- status = getpwent_next_netgr (pw, ent, NULL, buffer, buflen);
+ if (use_nisplus)
+ status = getpwent_next_nisplus_netgr (NULL, pw, ent, NULL, buffer,
+ buflen);
+ else
+ status = getpwent_next_nis_netgr (NULL, pw, ent, NULL, buffer, buflen);
if (status == NSS_STATUS_RETURN)
return getpwent_next_file (pw, ent, buffer, buflen);
else
return status;
}
- else if (ent->nis)
- {
- if (use_nisplus)
- return getpwent_next_nisplus (pw, ent, buffer, buflen);
- else
- return getpwent_next_nis (pw, ent, buffer, buflen);
- }
else
- return getpwent_next_file (pw, ent, buffer, buflen);
+ if (ent->nis)
+ {
+ if (use_nisplus)
+ return getpwent_next_nisplus (pw, ent, buffer, buflen);
+ else
+ return getpwent_next_nis (pw, ent, buffer, buflen);
+ }
+ else
+ return getpwent_next_file (pw, ent, buffer, buflen);
}
enum nss_status
-_nss_compat_getpwent_r (struct passwd *pwd, char *buffer,
- size_t buflen)
+_nss_compat_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen)
{
enum nss_status status = NSS_STATUS_SUCCESS;
@@ -944,6 +977,158 @@ _nss_compat_getpwent_r (struct passwd *pwd, char *buffer,
return status;
}
+/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
+static enum nss_status
+internal_getpwnam_r (const char *name, struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen)
+{
+ struct parser_data *data = (void *) buffer;
+
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ fgetpos (ent->stream, &pos);
+ p = fgets (buffer, buflen, ent->stream);
+ if (p == NULL)
+ {
+ if (feof (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+ else
+ {
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_pwent (p, result, data, buflen)));
+
+ if (parse_res == -1)
+ {
+ /* The parser ran out of space. */
+ fsetpos (ent->stream, &pos);
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ /* This is a real entry. */
+ if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
+ {
+ if (strcmp (result->pw_name, name) == 0)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -@netgroup */
+ if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ char buf2[1024];
+ char *user, *host, *domain;
+ struct __netgrent netgrdata;
+
+ bzero (&netgrdata, sizeof (struct __netgrent));
+ __internal_setnetgrent (&result->pw_name[2], &netgrdata);
+ while (__internal_getnetgrent_r (&host, &user, &domain,
+ &netgrdata, buf2, sizeof (buf2)))
+ {
+ if (user != NULL && user[0] != '-')
+ if (strcmp (user, name) == 0)
+ return NSS_STATUS_NOTFOUND;
+ }
+ __internal_endnetgrent (&netgrdata);
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ char buf[strlen (result->pw_name)];
+ int status;
+
+ strcpy (buf, &result->pw_name[2]);
+ ent->netgroup = TRUE;
+ ent->first = TRUE;
+ copy_pwd_changes (&ent->pwd, result, NULL, 0);
+
+ do
+ {
+ if (use_nisplus)
+ status = getpwent_next_nisplus_netgr (name, result, ent, buf,
+ buffer, buflen);
+ else
+ status = getpwent_next_nis_netgr (name, result, ent, buf,
+ buffer, buflen);
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ if (status == NSS_STATUS_SUCCESS &&
+ strcmp (result->pw_name, name) == 0)
+ return NSS_STATUS_SUCCESS;
+ } while (status == NSS_STATUS_SUCCESS);
+ continue;
+ }
+
+ /* -user */
+ if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ if (strcmp (&result->pw_name[1], name) == 0)
+ return NSS_STATUS_NOTFOUND;
+ else
+ continue;
+ }
+
+ /* +user */
+ if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ if (strcmp (name, &result->pw_name[1]) == 0)
+ {
+ enum nss_status status;
+
+ status = getpwnam_plususer (name, result, buffer, buflen);
+ if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getpwnam_plususer (name, result, buffer, buflen);
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else
+ if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+ return NSS_STATUS_SUCCESS;
+}
enum nss_status
_nss_compat_getpwnam_r (const char *name, struct passwd *pwd,
@@ -970,15 +1155,244 @@ _nss_compat_getpwnam_r (const char *name, struct passwd *pwd,
if (status != NSS_STATUS_SUCCESS)
return status;
- while ((status = internal_getpwent_r (pwd, &ent, buffer, buflen))
- == NSS_STATUS_SUCCESS)
- if (strcmp (pwd->pw_name, name) == 0)
- break;
+ status = internal_getpwnam_r (name, pwd, &ent, buffer, buflen);
internal_endpwent (&ent);
+
return status;
}
+/* This function handle the + entry in /etc/passwd for getpwuid */
+static enum nss_status
+getpwuid_plususer (uid_t uid, struct passwd *result, char *buffer,
+ size_t buflen)
+{
+ struct parser_data *data = (void *) buffer;
+ struct passwd pwd;
+ int parse_res;
+ char *p;
+ size_t plen;
+
+ memset (&pwd, '\0', sizeof (struct passwd));
+
+ copy_pwd_changes (&pwd, result, NULL, 0);
+
+ plen = pwd_need_buflen (&pwd);
+ if (plen > buflen)
+ {
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p = buffer + (buflen - plen);
+ buflen -= plen;
+
+ if (use_nisplus) /* Do the NIS+ query here */
+ {
+ nis_result *res;
+ char buf[1024 + pwdtablelen];
+
+ sprintf(buf, "[uid=%d],%s", uid, pwdtable);
+ res = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
+ {
+ enum nss_status status = niserr2nss (res->status);
+
+ nis_freeresult (res);
+ return status;
+ }
+ if ((parse_res = _nss_nisplus_parse_pwent (res, result, buffer,
+ buflen)) == -1)
+ {
+ nis_freeresult (res);
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ nis_freeresult (res);
+ }
+ else /* Use NIS */
+ {
+ char buf[1024];
+ char *domain, *outval, *ptr;
+ int outvallen;
+
+ if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
+ return NSS_STATUS_TRYAGAIN;
+
+ sprintf (buf, "%d", uid);
+ if (yp_match (domain, "passwd.byuid", buf, strlen (buf),
+ &outval, &outvallen)
+ != YPERR_SUCCESS)
+ return NSS_STATUS_TRYAGAIN;
+ ptr = strncpy (buffer, outval, buflen < (size_t) outvallen ?
+ buflen : (size_t) outvallen);
+ buffer[buflen < (size_t) outvallen ? buflen : (size_t) outvallen] = '\0';
+ free (outval);
+ while (isspace (*ptr))
+ ptr++;
+ if ((parse_res = _nss_files_parse_pwent (ptr, result, data, buflen))
+ == -1)
+ {
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ }
+
+ if (parse_res > 0)
+ {
+ copy_pwd_changes (result, &pwd, p, plen);
+ give_pwd_free (&pwd);
+ /* We found the entry. */
+ return NSS_STATUS_SUCCESS;
+ }
+ else
+ {
+ /* Give buffer the old len back */
+ buflen += plen;
+ give_pwd_free (&pwd);
+ }
+ return NSS_STATUS_RETURN;
+}
+
+/* Searches in /etc/passwd and the NIS/NIS+ map for a special user id */
+static enum nss_status
+internal_getpwuid_r (uid_t uid, struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen)
+{
+ struct parser_data *data = (void *) buffer;
+
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ fgetpos (ent->stream, &pos);
+ p = fgets (buffer, buflen, ent->stream);
+ if (p == NULL)
+ return NSS_STATUS_NOTFOUND;
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_pwent (p, result, data, buflen)));
+
+ if (parse_res == -1)
+ {
+ /* The parser ran out of space. */
+ fsetpos (ent->stream, &pos);
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ /* This is a real entry. */
+ if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
+ {
+ if (result->pw_uid == uid)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -@netgroup */
+ if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ char buf2[1024];
+ char *user, *host, *domain;
+ struct __netgrent netgrdata;
+
+ bzero (&netgrdata, sizeof (struct __netgrent));
+ __internal_setnetgrent (&result->pw_name[2], &netgrdata);
+ while (__internal_getnetgrent_r (&host, &user, &domain,
+ &netgrdata, buf2, sizeof (buf2)))
+ {
+ if (user != NULL && user[0] != '-')
+ blacklist_store_name (user, ent);
+ }
+ __internal_endnetgrent (&netgrdata);
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ char buf[strlen (result->pw_name)];
+ int status;
+
+ strcpy (buf, &result->pw_name[2]);
+ ent->netgroup = TRUE;
+ ent->first = TRUE;
+ copy_pwd_changes (&ent->pwd, result, NULL, 0);
+
+ do
+ {
+ if (use_nisplus)
+ status = getpwent_next_nisplus_netgr (NULL, result, ent, buf,
+ buffer, buflen);
+ else
+ status = getpwent_next_nis_netgr (NULL, result, ent, buf,
+ buffer, buflen);
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ if (status == NSS_STATUS_SUCCESS && uid == result->pw_uid)
+ return NSS_STATUS_SUCCESS;
+ } while (status == NSS_STATUS_SUCCESS);
+ continue;
+ }
+
+ /* -user */
+ if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ blacklist_store_name (&result->pw_name[1], ent);
+ continue;
+ }
+
+ /* +user */
+ if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ enum nss_status status;
+
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ blacklist_store_name (&result->pw_name[1], ent);
+ status = getpwnam_plususer (&result->pw_name[1], result, buffer,
+ buflen);
+ if (status == NSS_STATUS_SUCCESS && result->pw_uid == uid)
+ break;
+ else
+ continue;
+ }
+
+ /* +:... */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getpwuid_plususer (uid, result, buffer, buflen);
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else
+ if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+ return NSS_STATUS_SUCCESS;
+}
enum nss_status
_nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd,
@@ -1002,12 +1416,10 @@ _nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd,
if (status != NSS_STATUS_SUCCESS)
return status;
- while ((status = internal_getpwent_r (pwd, &ent, buffer, buflen))
- == NSS_STATUS_SUCCESS)
- if (pwd->pw_uid == uid && pwd->pw_name[0] != '+' && pwd->pw_name[0] != '-')
- break;
+ status = internal_getpwuid_r (uid, pwd, &ent, buffer, buflen);
internal_endpwent (&ent);
+
return status;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 18:06:35 +0000