*
* Copyright (C) 1991-2004 Miquel van Smoorenburg.
* Copyright (C) 2013 Ondrej Oprala <ooprala@redhat.com>
+ * Karel Zak <kzak@redhat.com>
*
* Re-implementation of the 'last' command, this time for Linux. Yes I know
* there is BSD last, but I just felt like writing this. No thanks :-). Also,
#define R_TIMECHANGE 7 /* NEW_TIME or OLD_TIME */
/* Global variables */
-int maxrecs = 0; /* Maximum number of records to list. */
-int recsdone = 0; /* Number of records listed */
-int showhost = 1; /* Show hostname too? */
-int altlist = 0; /* Show hostname at the end. */
-int usedns = 0; /* Use DNS to lookup the hostname. */
-int useip = 0; /* Print IP address in number format */
-int fulltime = 0; /* Print full dates and times */
-int name_len = 8; /* Default print 8 characters of name */
-int domain_len = 16; /* Default print 16 characters of domain */
-char **show = NULL; /* What do they want us to show */
-char *ufile; /* Filename of this file */
-time_t lastdate; /* Last date we've seen */
-#if CHOP_DOMAIN
-char hostname[256]; /* For gethostbyname() */
-char *domainname; /* Our domainname. */
+static int maxrecs = 0; /* Maximum number of records to list. */
+static int recsdone = 0; /* Number of records listed */
+static int showhost = 1; /* Show hostname too? */
+static int altlist = 0; /* Show hostname at the end. */
+static int usedns = 0; /* Use DNS to lookup the hostname. */
+static int useip = 0; /* Print IP address in number format */
+static int fulltime = 0; /* Print full dates and times */
+static int name_len = 8; /* Default print 8 characters of name */
+static int domain_len = 16; /* Default print 16 characters of domain */
+static char **show = NULL; /* What do they want us to show */
+static char *ufile; /* Filename of this file */
+static time_t lastdate; /* Last date we've seen */
+#if CHOP_DOMAIn
+static char hostname[256]; /* For gethostbyname() */
+static char *domainname; /* Our domainname. */
#endif
/*
int main(int argc, char **argv)
{
- FILE *fp; /* Filepointer of wtmp file */
-
- struct utmp ut; /* Current utmp entry */
- struct utmplist *p; /* Pointer into utmplist */
- struct utmplist *next;/* Pointer into utmplist */
-
- time_t lastboot = 0; /* Last boottime */
- time_t lastrch = 0; /* Last run level change */
- time_t lastdown; /* Last downtime */
- time_t begintime; /* When wtmp begins */
- int whydown = 0; /* Why we went down: crash or shutdown */
-
- int c, x; /* Scratch */
- struct stat st; /* To stat the [uw]tmp file */
- int quit = 0; /* Flag */
- int down = 0; /* Down flag */
- int lastb = 0; /* Is this 'lastb' ? */
- int extended = 0; /* Lots of info. */
- char *altufile = NULL;/* Alternate wtmp */
-
- time_t until = 0; /* at what time to stop parsing the file */
-
- static const struct option long_opts[] = {
- { "limit", required_argument, NULL, 'n' },
- { "help", no_argument, NULL, 'h' },
- { "file", required_argument, NULL, 'f' },
- { "nohostname", no_argument, NULL, 'R' },
- { "version", no_argument, NULL, 'V' },
- { "hostlast", no_argument, NULL, 'a' },
- { "until", required_argument, NULL, 't' },
- { "system", no_argument, NULL, 'x' },
- { "dns", no_argument, NULL, 'd' },
- { "ip", no_argument, NULL, 'i' },
- { "fulltimes", no_argument, NULL, 'F' },
- { "fullnames", no_argument, NULL, 'w' },
- { NULL, 0, NULL, 0 }
- };
-
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
- atexit(close_stdout);
-
- while ((c = getopt_long(argc, argv,
+ FILE *fp; /* Filepointer of wtmp file */
+
+ struct utmp ut; /* Current utmp entry */
+ struct utmplist *p; /* Pointer into utmplist */
+ struct utmplist *next; /* Pointer into utmplist */
+
+ time_t lastboot = 0; /* Last boottime */
+ time_t lastrch = 0; /* Last run level change */
+ time_t lastdown; /* Last downtime */
+ time_t begintime; /* When wtmp begins */
+ int whydown = 0; /* Why we went down: crash or shutdown */
+
+ int c, x; /* Scratch */
+ struct stat st; /* To stat the [uw]tmp file */
+ int quit = 0; /* Flag */
+ int down = 0; /* Down flag */
+ int lastb = 0; /* Is this 'lastb' ? */
+ int extended = 0; /* Lots of info. */
+ char *altufile = NULL; /* Alternate wtmp */
+
+ time_t until = 0; /* at what time to stop parsing the file */
+
+ static const struct option long_opts[] = {
+ { "limit", required_argument, NULL, 'n' },
+ { "help", no_argument, NULL, 'h' },
+ { "file", required_argument, NULL, 'f' },
+ { "nohostname", no_argument, NULL, 'R' },
+ { "version", no_argument, NULL, 'V' },
+ { "hostlast", no_argument, NULL, 'a' },
+ { "until", required_argument, NULL, 't' },
+ { "system", no_argument, NULL, 'x' },
+ { "dns", no_argument, NULL, 'd' },
+ { "ip", no_argument, NULL, 'i' },
+ { "fulltimes", no_argument, NULL, 'F' },
+ { "fullnames", no_argument, NULL, 'w' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ while ((c = getopt_long(argc, argv,
"hVf:n:RxadFit:0123456789w", long_opts, NULL)) != -1) {
- switch(c) {
- case 'h':
- usage(stdout);
- break;
- case 'V':
- printf(UTIL_LINUX_VERSION);
- return EXIT_SUCCESS;
- case 'R':
- showhost = 0;
- break;
- case 'x':
- extended = 1;
- break;
- case 'n':
- maxrecs = atoi(optarg);
- break;
- case 'f':
- altufile = xstrdup(optarg);
- break;
- case 'd':
- usedns++;
- break;
- case 'i':
- useip++;
- break;
- case 'a':
- altlist++;
- break;
- case 'F':
- fulltime++;
- break;
- case 't':
- until = parsetm(optarg);
- if (until == (time_t) -1)
- errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg);
- break;
- case 'w':
- if (UT_NAMESIZE > name_len)
- name_len = UT_NAMESIZE;
- if (UT_HOSTSIZE > domain_len)
- domain_len = UT_HOSTSIZE;
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- maxrecs = 10*maxrecs + c - '0';
- break;
- default:
- usage(stderr);
- break;
- }
- }
- if (optind < argc) show = argv + optind;
-
- /*
- * Which file do we want to read?
- */
- lastb = !strcmp(program_invocation_short_name, "lastb");
- ufile = altufile ? altufile : lastb ? _PATH_BTMP : _PATH_WTMP;
-
- time(&lastdown);
- lastrch = lastdown;
-
- /*
- * Fill in 'lastdate'
- */
- lastdate = lastdown;
+ switch(c) {
+ case 'h':
+ usage(stdout);
+ break;
+ case 'V':
+ printf(UTIL_LINUX_VERSION);
+ return EXIT_SUCCESS;
+ case 'R':
+ showhost = 0;
+ break;
+ case 'x':
+ extended = 1;
+ break;
+ case 'n':
+ maxrecs = atoi(optarg);
+ break;
+ case 'f':
+ altufile = xstrdup(optarg);
+ break;
+ case 'd':
+ usedns++;
+ break;
+ case 'i':
+ useip++;
+ break;
+ case 'a':
+ altlist++;
+ break;
+ case 'F':
+ fulltime++;
+ break;
+ case 't':
+ until = parsetm(optarg);
+ if (until == (time_t) -1)
+ errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg);
+ break;
+ case 'w':
+ if (UT_NAMESIZE > name_len)
+ name_len = UT_NAMESIZE;
+ if (UT_HOSTSIZE > domain_len)
+ domain_len = UT_HOSTSIZE;
+ break;
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ maxrecs = 10 * maxrecs + c - '0';
+ break;
+ default:
+ usage(stderr);
+ break;
+ }
+ }
+
+ if (optind < argc)
+ show = argv + optind;
+
+ /*
+ * Which file do we want to read?
+ */
+ lastb = !strcmp(program_invocation_short_name, "lastb");
+ ufile = altufile ? altufile : lastb ? _PATH_BTMP : _PATH_WTMP;
+
+ time(&lastdown);
+ lastrch = lastdown;
+
+ /*
+ * Fill in 'lastdate'
+ */
+ lastdate = lastdown;
#if CHOP_DOMAIN
- /*
- * Find out domainname.
- *
- * This doesn't work on modern systems, where only a DNS
- * lookup of the result from hostname() will get you the domainname.
- * Remember that domainname() is the NIS domainname, not DNS.
- * So basically this whole piece of code is bullshit.
- */
- hostname[0] = 0;
- (void) gethostname(hostname, sizeof(hostname));
- if ((domainname = strchr(hostname, '.')) != NULL) domainname++;
- if (domainname == NULL || domainname[0] == 0) {
+ /*
+ * Find out domainname.
+ *
+ * This doesn't work on modern systems, where only a DNS
+ * lookup of the result from hostname() will get you the domainname.
+ * Remember that domainname() is the NIS domainname, not DNS.
+ * So basically this whole piece of code is bullshit.
+ */
hostname[0] = 0;
- (void) getdomainname(hostname, sizeof(hostname));
- hostname[sizeof(hostname) - 1] = 0;
- domainname = hostname;
- if (strcmp(domainname, "(none)") == 0 || domainname[0] == 0)
- domainname = NULL;
- }
+ gethostname(hostname, sizeof(hostname));
+
+ if ((domainname = strchr(hostname, '.')) != NULL)
+ domainname++;
+ if (domainname == NULL || domainname[0] == 0) {
+ hostname[0] = 0;
+ getdomainname(hostname, sizeof(hostname));
+ hostname[sizeof(hostname) - 1] = 0;
+ domainname = hostname;
+
+ if (strcmp(domainname, "(none)") == 0 || domainname[0] == 0)
+ domainname = NULL;
+ }
#endif
+ /*
+ * Install signal handlers
+ */
+ signal(SIGINT, int_handler);
+ signal(SIGQUIT, quit_handler);
- /*
- * Install signal handlers
- */
- signal(SIGINT, int_handler);
- signal(SIGQUIT, quit_handler);
-
- /*
- * Open the utmp file
- */
- if ((fp = fopen(ufile, "r")) == NULL)
- err(EXIT_FAILURE, _("cannot open %s"), ufile);
-
- /*
- * Optimize the buffer size.
- */
- setvbuf(fp, NULL, _IOFBF, UCHUNKSIZE);
-
- /*
- * Read first structure to capture the time field
- */
- if (uread(fp, &ut, NULL) == 1)
- begintime = ut.ut_time;
- else {
- fstat(fileno(fp), &st);
- begintime = st.st_ctime;
- quit = 1;
- }
-
- /*
- * Go to end of file minus one structure
- * and/or initialize utmp reading code.
- */
- uread(fp, NULL, NULL);
-
- /*
- * Read struct after struct backwards from the file.
- */
- while(!quit) {
-
- if (uread(fp, &ut, &quit) != 1)
- break;
-
- if (until && until < ut.ut_time)
- continue;
-
- lastdate = ut.ut_time;
-
- if (lastb) {
- quit = list(&ut, ut.ut_time, R_NORMAL);
- continue;
- }
+ /*
+ * Open the utmp file
+ */
+ if ((fp = fopen(ufile, "r")) == NULL)
+ err(EXIT_FAILURE, _("cannot open %s"), ufile);
/*
- * Set ut_type to the correct type.
+ * Optimize the buffer size.
*/
- if (strncmp(ut.ut_line, "~", 1) == 0) {
- if (strncmp(ut.ut_user, "shutdown", 8) == 0)
- ut.ut_type = SHUTDOWN_TIME;
- else if (strncmp(ut.ut_user, "reboot", 6) == 0)
- ut.ut_type = BOOT_TIME;
- else if (strncmp(ut.ut_user, "runlevel", 8) == 0)
- ut.ut_type = RUN_LVL;
- }
-#if 1 /*def COMPAT*/
+ setvbuf(fp, NULL, _IOFBF, UCHUNKSIZE);
+
/*
- * For stupid old applications that don't fill in
- * ut_type correctly.
+ * Read first structure to capture the time field
*/
+ if (uread(fp, &ut, NULL) == 1)
+ begintime = ut.ut_time;
else {
- if (ut.ut_type != DEAD_PROCESS &&
- ut.ut_name[0] && ut.ut_line[0] &&
- strcmp(ut.ut_name, "LOGIN") != 0)
- ut.ut_type = USER_PROCESS;
+ fstat(fileno(fp), &st);
+ begintime = st.st_ctime;
+ quit = 1;
+ }
+
+ /*
+ * Go to end of file minus one structure
+ * and/or initialize utmp reading code.
+ */
+ uread(fp, NULL, NULL);
+
+ /*
+ * Read struct after struct backwards from the file.
+ */
+ while (!quit) {
+
+ if (uread(fp, &ut, &quit) != 1)
+ break;
+
+ if (until && until < ut.ut_time)
+ continue;
+
+ lastdate = ut.ut_time;
+
+ if (lastb) {
+ quit = list(&ut, ut.ut_time, R_NORMAL);
+ continue;
+ }
+
/*
- * Even worse, applications that write ghost
- * entries: ut_type set to USER_PROCESS but
- * empty ut_name...
+ * Set ut_type to the correct type.
*/
- if (ut.ut_name[0] == 0)
- ut.ut_type = DEAD_PROCESS;
-
+ if (strncmp(ut.ut_line, "~", 1) == 0) {
+ if (strncmp(ut.ut_user, "shutdown", 8) == 0)
+ ut.ut_type = SHUTDOWN_TIME;
+ else if (strncmp(ut.ut_user, "reboot", 6) == 0)
+ ut.ut_type = BOOT_TIME;
+ else if (strncmp(ut.ut_user, "runlevel", 8) == 0)
+ ut.ut_type = RUN_LVL;
+ }
+#if 1 /*def COMPAT*/
/*
- * Clock changes.
+ * For stupid old applications that don't fill in
+ * ut_type correctly.
*/
- if (strcmp(ut.ut_name, "date") == 0) {
- if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME;
- if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME;
+ else {
+ if (ut.ut_type != DEAD_PROCESS &&
+ ut.ut_name[0] && ut.ut_line[0] &&
+ strcmp(ut.ut_name, "LOGIN") != 0)
+ ut.ut_type = USER_PROCESS;
+ /*
+ * Even worse, applications that write ghost
+ * entries: ut_type set to USER_PROCESS but
+ * empty ut_name...
+ */
+ if (ut.ut_name[0] == 0)
+ ut.ut_type = DEAD_PROCESS;
+
+ /*
+ * Clock changes.
+ */
+ if (strcmp(ut.ut_name, "date") == 0) {
+ if (ut.ut_line[0] == '|')
+ ut.ut_type = OLD_TIME;
+ if (ut.ut_line[0] == '{')
+ ut.ut_type = NEW_TIME;
+ }
}
- }
#endif
-
- switch (ut.ut_type) {
+ switch (ut.ut_type) {
case SHUTDOWN_TIME:
if (extended) {
strcpy(ut.ut_line, "system down");
case USER_PROCESS:
/*
- * This was a login - show the first matching
- * logout record and delete all records with
- * the same ut_line.
+ * This was a login - show the first matching
+ * logout record and delete all records with
+ * the same ut_line.
*/
c = 0;
for (p = utmplist; p; p = next) {
}
}
/*
- * Not found? Then crashed, down, still
- * logged in, or missing logout record.
+ * Not found? Then crashed, down, still
+ * logged in, or missing logout record.
*/
if (c == 0) {
if (lastboot == 0) {
case DEAD_PROCESS:
/*
- * Just store the data if it is
- * interesting enough.
+ * Just store the data if it is
+ * interesting enough.
*/
if (ut.ut_line[0] == 0)
break;
utmplist = p;
break;
- }
- /*
- * If we saw a shutdown/reboot record we can remove
- * the entire current utmplist.
- */
- if (down) {
- lastboot = ut.ut_time;
- whydown = (ut.ut_type == SHUTDOWN_TIME) ? R_DOWN : R_CRASH;
- for (p = utmplist; p; p = next) {
- next = p->next;
- free(p);
}
- utmplist = NULL;
- down = 0;
+
+ /*
+ * If we saw a shutdown/reboot record we can remove
+ * the entire current utmplist.
+ */
+ if (down) {
+ lastboot = ut.ut_time;
+ whydown = (ut.ut_type == SHUTDOWN_TIME) ? R_DOWN : R_CRASH;
+ for (p = utmplist; p; p = next) {
+ next = p->next;
+ free(p);
+ }
+ utmplist = NULL;
+ down = 0;
+ }
}
- }
- printf(_("\n%s begins %s"), basename(ufile), ctime(&begintime));
- fclose(fp);
- return EXIT_SUCCESS;
+ printf(_("\n%s begins %s"), basename(ufile), ctime(&begintime));
+
+ fclose(fp);
+ return EXIT_SUCCESS;
}
projects / thirdparty / util-linux.git / commitdiff
