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who: fix attempts to open '/dev/dev/ttyX'; make columns a bit wider, add -H

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function                                             old     new   delta
who_main                                             292     363     +71

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-04-04 23:45:09 +02:00
parent f8fcc184b6
commit 4c721049c3
3 changed files with 32 additions and 19 deletions
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44
coreutils/who.c
View File

@ -42,35 +42,47 @@ static void idle_string(char *str6, time_t t)
int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int who_main(int argc UNUSED_PARAM, char **argv)
{
char str6[6];
struct utmp *ut;
struct stat st;
char *name;
unsigned opt;
opt_complementary = "=0";
opt = getopt32(argv, "a");
opt = getopt32(argv, "aH");
if (opt & 2) // -H
printf("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST\n");
setutent();
printf("USER TTY IDLE TIME HOST\n");
while ((ut = getutent()) != NULL) {
if (ut->ut_user[0] && (opt || ut->ut_type == USER_PROCESS)) {
time_t tmp;
/* ut->ut_line is device name of tty - "/dev/" */
name = concat_path_file("/dev", ut->ut_line);
if (ut->ut_user[0]
&& ((opt & 1) || ut->ut_type == USER_PROCESS)
) {
char str6[6];
char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1];
struct stat st;
time_t seconds;
str6[0] = '?';
str6[1] = '\0';
strcpy(name, "/dev/");
safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1,
ut->ut_line,
sizeof(ut->ut_line)+1
);
if (stat(name, &st) == 0)
idle_string(str6, st.st_atime);
/* manpages say ut_tv.tv_sec *is* time_t,
* but some systems have it wrong */
tmp = ut->ut_tv.tv_sec;
/* 15 chars for time: Nov 10 19:33:20 */
printf("%-10s %-8s %-9s %-15.15s %s\n",
ut->ut_user, ut->ut_line, str6,
ctime(&tmp) + 4, ut->ut_host);
if (ENABLE_FEATURE_CLEAN_UP)
free(name);
seconds = ut->ut_tv.tv_sec;
/* How wide time field can be?
* "Nov 10 19:33:20": 15 chars
* "2010-11-10 19:33": 16 chars
*/
printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n",
(int)sizeof(ut->ut_user), ut->ut_user,
(int)sizeof(ut->ut_line), ut->ut_line,
str6,
ctime(&seconds) + 4,
(int)sizeof(ut->ut_host), ut->ut_host
);
}
}
if (ENABLE_FEATURE_CLEAN_UP)

3
loginutils/login.c
View File

@ -61,7 +61,7 @@ static void read_or_build_utent(struct utmp *utptr, int run_by_root)
/* First, try to find a valid utmp entry for this process. */
/* If there is one, just use it. */
while ((ut = getutent()) != NULL)
while ((ut = getutent()) != NULL) {
if (ut->ut_pid == pid && ut->ut_line[0] && ut->ut_id[0]
&& (ut->ut_type == LOGIN_PROCESS || ut->ut_type == USER_PROCESS)
) {
@ -70,6 +70,7 @@ static void read_or_build_utent(struct utmp *utptr, int run_by_root)
memset(utptr->ut_host, 0, sizeof(utptr->ut_host));
return;
}
}
// Why? Do we require non-root to exec login from another
// former login process (e.g. login shell)? Some login's have

4
networking/telnetd.c
View File

@ -74,11 +74,11 @@ struct globals {
string of characters fit for the terminal. Do this by packing
all characters meant for the terminal sequentially towards the end of buf.
Return a pointer to the beginning of the characters meant for the terminal.
Return a pointer to the beginning of the characters meant for the terminal
and make *num_totty the number of characters that should be sent to
the terminal.
Note - If an IAC (3 byte quantity) starts before (bf + len) but extends
Note - if an IAC (3 byte quantity) starts before (bf + len) but extends
past (bf + len) then that IAC will be left unprocessed and *processed
will be less than len.