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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-12-04 18:46:01 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-12-04 18:46:01 +0000
commitf3fca91e9f427f2b026df07607c8b903aed93395 (patch)
tree723f90d80ae122fb1392df1ce122f1d1607bbd05 /loginutils
parentc689fcfdb00a5a3a05f433806eeb10cf4c1e6f7d (diff)
downloadbusybox-f3fca91e9f427f2b026df07607c8b903aed93395.tar.gz
busybox-f3fca91e9f427f2b026df07607c8b903aed93395.tar.bz2
getty: a small code shrink
touch - 40 +40 fakehost 4 - -4 getty_main 2546 2493 -53
Diffstat (limited to 'loginutils')
-rw-r--r--loginutils/getty.c67
1 files changed, 33 insertions, 34 deletions
diff --git a/loginutils/getty.c b/loginutils/getty.c
index 590a05de8..31230c9a5 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -28,12 +28,16 @@
* System V, assume it is SunOS 4.
*/
#ifdef LOGIN_PROCESS /* defined in System V utmp.h */
-#define SYSV_STYLE /* select System V style getty */
#include <sys/utsname.h>
#include <time.h>
#if ENABLE_FEATURE_WTMP
extern void updwtmp(const char *filename, const struct utmp *ut);
#endif
+#else /* if !sysV style, wtmp/utmp code is off */
+#undef ENABLE_FEATURE_UTMP
+#undef ENABLE_FEATURE_WTMP
+#define ENABLE_FEATURE_UTMP 0
+#define ENABLE_FEATURE_WTMP 0
#endif /* LOGIN_PROCESS */
/*
@@ -116,7 +120,7 @@ static const struct chardata init_chardata = {
static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
#define F_INITSTRING (1 << 0) /* -I initstring is set */
#define F_LOCAL (1 << 1) /* -L force local */
-#define F_FAKEHOST (1 << 2) /* -H force fakehost */
+#define F_FAKEHOST (1 << 2) /* -H fake hostname */
#define F_CUSTISSUE (1 << 3) /* -f give alternative issue file */
#define F_RTSCTS (1 << 4) /* -h enable RTS/CTS flow control */
#define F_ISSUE (1 << 5) /* -i display /etc/issue */
@@ -124,11 +128,9 @@ static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
#define F_PARSE (1 << 7) /* -m process modem status messages */
#define F_TIMEOUT (1 << 8) /* -t time out */
#define F_WAITCRLF (1 << 9) /* -w wait for CR or LF */
-#define F_NOPROMPT (1 << 10) /* -n don't ask for login name! */
+#define F_NOPROMPT (1 << 10) /* -n don't ask for login name */
-/* Fake hostname for ut_host specified on command line. */
-static char *fakehost = NULL;
#define line_buf bb_common_bufsiz1
/* The following is used for understandable diagnostics. */
@@ -175,20 +177,20 @@ static void parse_speeds(struct options *op, char *arg)
}
/* parse_args - parse command-line arguments */
-static void parse_args(char **argv, struct options *op)
+static void parse_args(char **argv, struct options *op, char **fakehost_p)
{
char *ts;
opt_complementary = "-2"; /* at least 2 args */
op->flags = getopt32(argv, opt_string,
- &(op->initstring), &fakehost, &(op->issue),
+ &(op->initstring), fakehost_p, &(op->issue),
&(op->login), &ts);
argv += optind;
if (op->flags & F_INITSTRING) {
const char *p = op->initstring;
char *q;
- op->initstring = q = xstrdup(op->initstring);
+ op->initstring = q = xstrdup(p);
/* copy optarg into op->initstring decoding \ddd
octal codes into chars */
while (*p) {
@@ -564,16 +566,24 @@ static void termios_final(struct options *op, struct termios *tp, struct chardat
ioctl_or_perror_and_die(0, TCSETS, tp, "%s: TCSETS", op->tty);
}
-#ifdef SYSV_STYLE
#if ENABLE_FEATURE_UTMP
+static void touch(const char *filename)
+{
+ if (access(filename, R_OK | W_OK) == -1)
+ close(open(filename, O_WRONLY | O_CREAT, 0664));
+}
+
/* update_utmp - update our utmp entry */
-static void update_utmp(const char *line)
+static void update_utmp(const char *line, char *fakehost)
{
struct utmp ut;
struct utmp *utp;
- time_t t;
int mypid = getpid();
+ /* In case we won't find an entry below... */
+ memset(&ut, 0, sizeof(ut));
+ safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
+
/*
* The utmp file holds miscellaneous information about things started by
* /sbin/init and other system-related events. Our purpose is to update
@@ -582,29 +592,22 @@ static void update_utmp(const char *line)
* utmp file can be opened for update, and if we are able to find our
* entry in the utmp file.
*/
- if (access(_PATH_UTMP, R_OK|W_OK) == -1) {
- close(creat(_PATH_UTMP, 0664));
- }
+ touch(_PATH_UTMP);
+
utmpname(_PATH_UTMP);
setutent();
- while ((utp = getutent())
- && !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid)
- ) {
- continue;
+ while ((utp = getutent()) != NULL) {
+ if (utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid) {
+ memcpy(&ut, utp, sizeof(ut));
+ break;
+ }
}
- /* some inits don't initialize utmp... */
- memset(&ut, 0, sizeof(ut));
- safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
- if (utp)
- memcpy(&ut, utp, sizeof(ut));
-
strcpy(ut.ut_user, "LOGIN");
safe_strncpy(ut.ut_line, line, sizeof(ut.ut_line));
if (fakehost)
safe_strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host));
- time(&t);
- ut.ut_time = t;
+ ut.ut_time = time(NULL);
ut.ut_type = LOGIN_PROCESS;
ut.ut_pid = mypid;
@@ -612,19 +615,17 @@ static void update_utmp(const char *line)
endutent();
#if ENABLE_FEATURE_WTMP
- if (access(bb_path_wtmp_file, R_OK|W_OK) == -1)
- close(creat(bb_path_wtmp_file, 0664));
+ touch(bb_path_wtmp_file);
updwtmp(bb_path_wtmp_file, &ut);
#endif
}
-
#endif /* CONFIG_FEATURE_UTMP */
-#endif /* SYSV_STYLE */
int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int getty_main(int argc, char **argv)
{
int n;
+ char *fakehost = NULL; /* Fake hostname for ut_host */
char *logname; /* login name, given to /bin/login */
/* Merging these into "struct local" may _seem_ to reduce
* parameter passing, but today's gcc will inline
@@ -673,7 +674,7 @@ int getty_main(int argc, char **argv)
#endif
/* Parse command-line arguments. */
- parse_args(argv, &options);
+ parse_args(argv, &options, &fakehost);
debug("calling open_tty\n");
/* Open the tty as standard input, if it is not "-" */
@@ -694,11 +695,9 @@ int getty_main(int argc, char **argv)
*/
ioctl_or_perror_and_die(0, TCGETS, &termios, "%s: TCGETS", options.tty);
-#ifdef SYSV_STYLE
#if ENABLE_FEATURE_UTMP
/* Update the utmp file */
- update_utmp(options.tty);
-#endif
+ update_utmp(options.tty, fakehost);
#endif
#ifdef __linux__