- (djm) Fixes to lastlog code for Irix

 - (djm) Use atomicio in loginrec

1 files changed, 24 insertions, 32 deletions

diff --git a/loginrec.c b/loginrec.c
index 5b487eb70..6a6443d2b 100644
--- a/loginrec.c
+++ b/loginrec.c
@@ -170,7 +170,7 @@
 #include "xmalloc.h"
 #include "loginrec.h"
 
-RCSID("$Id: loginrec.c,v 1.11 2000/06/27 01:18:27 djm Exp $");
+RCSID("$Id: loginrec.c,v 1.12 2000/06/27 14:50:50 djm Exp $");
 
 /**
  ** prototypes for helper functions in this file
@@ -281,17 +281,16 @@ login_get_lastlog_time(const int uid)
 struct logininfo *
 login_get_lastlog(struct logininfo *li, const int uid)
 {
-#ifndef USE_LASTLOG
         struct passwd *pw;
-#endif
 
         memset(li, '\0', sizeof(struct logininfo));
         li->uid = uid;
 
-#ifndef USE_LASTLOG
-        /* If we don't have a 'real' lastlog, we need the username to
+        /* 
+         * If we don't have a 'real' lastlog, we need the username to
          * reliably search wtmp(x) for the last login (see
-         * wtmp_get_entry().) */
+         * wtmp_get_entry().) 
+         */
         pw = getpwuid(uid);
         if (pw == NULL)
                 fatal("login_get_lastlog: Cannot find account for uid %i", uid);
@@ -299,7 +298,6 @@ login_get_lastlog(struct logininfo *li, const int uid)
         /* No MIN_SIZEOF here - we absolutely *must not* truncate the
          * username */
         strlcpy(li->username, pw->pw_name, sizeof(li->username));
-#endif
 
         if (getlast_entry(li))
                 return li;
@@ -452,10 +450,7 @@ int
 getlast_entry(struct logininfo *li)
 {
 #ifdef USE_LASTLOG
-        if (lastlog_get_entry(li))
-                return 1;
-        else
-                return 0;
+        return(lastlog_get_entry(li));
 #else /* !USE_LASTLOG */
 
 #ifdef DISABLE_LASTLOG
@@ -738,22 +733,23 @@ utmp_write_direct(struct logininfo *li, struct utmp *ut)
                  * If the new ut_line is empty but the old one is not
                  * and ut_line and ut_name match, preserve the old ut_line.
                  */
-                if (   read(fd, &old_ut, sizeof(struct utmp)) == sizeof(struct utmp)
-                       && ut->ut_host[0] == '\0'
-                       && old_ut.ut_host[0] != '\0'
-                       && strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0
-                       && strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0  )
+                if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && 
+                        (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && 
+                        (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && 
+                        (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) {
                         (void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
-
+                }
+                
                 (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
-                if (write(fd, ut, sizeof(struct utmp))==-1)
+                if (atomicio(write, fd, ut, sizeof(ut)) != sizeof(ut))
                         log("utmp_write_direct: error writing %s: %s",
                             UTMP_FILE, strerror(errno));
       
                 (void)close(fd);
                 return 1;
-        } else
+        } else {
                 return 0;
+        }
 }
 # endif /* UTMP_USE_LIBRARY */
 
@@ -936,8 +932,7 @@ wtmp_write(struct logininfo *li, struct utmp *ut)
                 return 0;
         }
         if (fstat(fd, &buf) == 0) 
-                if (write(fd, (char *)ut, sizeof(struct utmp)) != 
-                    sizeof(struct utmp)) {
+                if (atomicio(write, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
                         ftruncate(fd, buf.st_size);
                         log("wtmp_write: problem writing %s: %s",
                             WTMP_FILE, strerror(errno));
@@ -1044,7 +1039,7 @@ wtmp_get_entry(struct logininfo *li)
         }
 
         while (!found) {
-                if (read(fd, &ut, sizeof(ut)) != sizeof(ut)) {
+                if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
                         log("wtmp_get_entry: read of %s failed: %s",
                             WTMP_FILE, strerror(errno));
                         close (fd);
@@ -1104,8 +1099,7 @@ wtmpx_write(struct logininfo *li, struct utmpx *utx)
         }
 
         if (fstat(fd, &buf) == 0) 
-                if (write(fd, (char *)utx, sizeof(struct utmpx)) != 
-                    sizeof(struct utmpx)) {
+                if (atomicio(write, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
                         ftruncate(fd, buf.st_size);
                         log("wtmpx_write: problem writing %s: %s",
                             WTMPX_FILE, strerror(errno));
@@ -1201,7 +1195,7 @@ wtmpx_get_entry(struct logininfo *li)
         }
 
         while (!found) {
-                if (read(fd, &utx, sizeof(utx)) != sizeof(utx)) {
+                if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
                         log("wtmpx_get_entry: read of %s failed: %s",
                             WTMPX_FILE, strerror(errno));
                         close (fd);
@@ -1360,7 +1354,7 @@ lastlog_openseek(struct logininfo *li, int *fd, int filemode)
 
         *fd = open(lastlog_file, filemode);
         if ( *fd < 0) {
-                log("lastlog_openseek: Couldn't open %s: %s",
+                debug("lastlog_openseek: Couldn't open %s: %s",
                     lastlog_file, strerror(errno));
                 return 0;
         }
@@ -1386,9 +1380,8 @@ lastlog_perform_login(struct logininfo *li)
         lastlog_construct(li, &last);
 
         /* write the entry */
-        if (lastlog_openseek(li, &fd, O_RDWR)) {
-                if (write(fd, &last, sizeof(struct lastlog)) != 
-                        sizeof(struct lastlog)) {
+        if (lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) {
+                if (atomicio(write, fd, &last, sizeof(last)) != sizeof(last)) {
                         log("lastlog_write_filemode: Error writing to %s: %s",
                             LASTLOG_FILE, strerror(errno));
                         return 0;
@@ -1427,9 +1420,8 @@ lastlog_get_entry(struct logininfo *li)
         int fd;
 
         if (lastlog_openseek(li, &fd, O_RDONLY)) {
-                if ( read(fd, &last, sizeof(struct lastlog)) != 
-                        sizeof(struct lastlog) ) {
-                        log("lastlog_write_filemode: Error reading from %s: %s",
+                if (atomicio(read, fd, &last, sizeof(last)) != sizeof(last)) {
+                        log("lastlog_get_entry: Error reading from %s: %s",
                             LASTLOG_FILE, strerror(errno));
                         return 0;
                 } else {