- (djm) Fixes to lastlog code for Irix
- (djm) Use atomicio in loginrec
diff --git a/loginrec.c b/loginrec.c
index 5b487eb..6a6443d 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 @@
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 @@
/* 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 @@
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 @@
* 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 @@
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 @@
}
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 @@
}
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 @@
}
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 @@
*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_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 @@
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 {