diff options
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/who.c | 44 |
1 files changed, 28 insertions, 16 deletions
diff --git a/coreutils/who.c b/coreutils/who.c index 85a0025c3..dfbb4c046 100644 --- a/coreutils/who.c +++ b/coreutils/who.c @@ -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) |