Added at/atrm/atq/batch from Linux as hacked by Chris Demetriou.

1 files changed, 591 insertions, 0 deletions

diff --git a/usr.bin/at/parsetime.c b/usr.bin/at/parsetime.c
new file mode 100644
index 0000000..64c4eea
--- /dev/null
+++ b/usr.bin/at/parsetime.c
@@ -0,0 +1,591 @@
+/* 
+ * parsetime.c - parse time for at(1)
+ * Copyright (C) 1993  Thomas Koenig
+ *
+ * modifications for english-language times
+ * Copyright (C) 1993  David Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  at [NOW] PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS
+ *     /NUMBER [DOT NUMBER] [AM|PM]\ /[MONTH NUMBER [NUMBER]]             \
+ *     |NOON                       | |[TOMORROW]                          |
+ *     |MIDNIGHT                   | |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
+ *     \TEATIME                    / \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
+ */
+
+/* System Headers */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <ctype.h>
+
+/* Local headers */
+
+#include "at.h"
+#include "panic.h"
+
+
+/* Structures and unions */
+
+enum {	/* symbols */
+    MIDNIGHT, NOON, TEATIME,
+    PM, AM, TOMORROW, TODAY, NOW,
+    MINUTES, HOURS, DAYS, WEEKS,
+    NUMBER, PLUS, DOT, SLASH, ID, JUNK,
+    JAN, FEB, MAR, APR, MAY, JUN,
+    JUL, AUG, SEP, OCT, NOV, DEC
+};
+
+/*
+ * parse translation table - table driven parsers can be your FRIEND!
+ */
+struct {
+    char *name;	/* token name */
+    int value;	/* token id */
+} Specials[] = {
+    { "midnight", MIDNIGHT },	/* 00:00:00 of today or tomorrow */
+    { "noon", NOON },		/* 12:00:00 of today or tomorrow */
+    { "teatime", TEATIME },	/* 16:00:00 of today or tomorrow */
+    { "am", AM },		/* morning times for 0-12 clock */
+    { "pm", PM },		/* evening times for 0-12 clock */
+    { "tomorrow", TOMORROW },	/* execute 24 hours from time */
+    { "today", TODAY },		/* execute today - don't advance time */
+    { "now", NOW },		/* opt prefix for PLUS */
+
+    { "minute", MINUTES },	/* minutes multiplier */
+    { "min", MINUTES },
+    { "m", MINUTES },
+    { "minutes", MINUTES },	/* (pluralized) */
+    { "hour", HOURS },		/* hours ... */
+    { "hr", HOURS },		/* abbreviated */
+    { "h", HOURS },
+    { "hours", HOURS },		/* (pluralized) */
+    { "day", DAYS },		/* days ... */
+    { "d", DAYS },
+    { "days", DAYS },		/* (pluralized) */
+    { "week", WEEKS },		/* week ... */
+    { "w", WEEKS },
+    { "weeks", WEEKS },		/* (pluralized) */
+    { "jan", JAN },
+    { "feb", FEB },
+    { "mar", MAR },
+    { "apr", APR },
+    { "may", MAY },
+    { "jun", JUN },
+    { "jul", JUL },
+    { "aug", AUG },
+    { "sep", SEP },
+    { "oct", OCT },
+    { "nov", NOV },
+    { "dec", DEC }
+} ;
+
+/* File scope variables */
+
+static char **scp;	/* scanner - pointer at arglist */
+static char scc;	/* scanner - count of remaining arguments */
+static char *sct;	/* scanner - next char pointer in current argument */
+static int need;	/* scanner - need to advance to next argument */
+
+static char *sc_token;	/* scanner - token buffer */
+static size_t sc_len;   /* scanner - lenght of token buffer */
+static int sc_tokid;	/* scanner - token id */
+
+static char rcsid[] = "$Id: parsetime.c,v 1.1 1993/12/05 11:37:05 cgd Exp $";
+
+/* Local functions */
+
+/*
+ * parse a token, checking if it's something special to us
+ */
+static int
+parse_token(arg)
+	char *arg;
+{
+    int i;
+
+    for (i=0; i<(sizeof Specials/sizeof Specials[0]); i++)
+	if (strcasecmp(Specials[i].name, arg) == 0) {
+	    return sc_tokid = Specials[i].value;
+	}
+
+    /* not special - must be some random id */
+    return ID;
+} /* parse_token */
+
+
+/*
+ * init_scanner() sets up the scanner to eat arguments
+ */
+static void
+init_scanner(argc, argv)
+	int argc;
+	char **argv;
+{
+    scp = argv;
+    scc = argc;
+    need = 1;
+    sc_len = 1;
+    while (--argc > 0)
+	sc_len += strlen(*++argv);
+
+    sc_token = (char *) malloc(sc_len);
+    if (sc_token == NULL)
+	panic("Insufficient virtual memory");
+} /* init_scanner */
+
+/*
+ * token() fetches a token from the input stream
+ */
+static int
+token()
+{
+    int idx;
+
+    while (1) {
+	memset(sc_token, 0, sc_len);
+	sc_tokid = EOF;
+	idx = 0;
+
+	/*
+	 * if we need to read another argument, walk along the argument list;
+	 * when we fall off the arglist, we'll just return EOF forever
+	 */
+	if (need) {
+	    if (scc < 1)
+		return sc_tokid;
+	    sct = *scp;
+	    scp++;
+	    scc--;
+	    need = 0;
+	}
+	/*
+	 * eat whitespace now - if we walk off the end of the argument,
+	 * we'll continue, which puts us up at the top of the while loop
+	 * to fetch the next argument in
+	 */
+	while (isspace(*sct))
+	    ++sct;
+	if (!*sct) {
+	    need = 1;
+	    continue;
+	}
+
+	/*
+	 * preserve the first character of the new token
+	 */
+	sc_token[0] = *sct++;
+
+	/*
+	 * then see what it is
+	 */
+	if (isdigit(sc_token[0])) {
+	    while (isdigit(*sct))
+		sc_token[++idx] = *sct++;
+	    sc_token[++idx] = 0;
+	    return sc_tokid = NUMBER;
+	} else if (isalpha(sc_token[0])) {
+	    while (isalpha(*sct))
+		sc_token[++idx] = *sct++;
+	    sc_token[++idx] = 0;
+	    return parse_token(sc_token);
+	}
+	else if (sc_token[0] == ':' || sc_token[0] == '.')
+	    return sc_tokid = DOT;
+	else if (sc_token[0] == '+')
+	    return sc_tokid = PLUS;
+	else if (*sct == '/')
+	    return sc_tokid = SLASH;
+	else
+	    return sc_tokid = JUNK;
+    } /* while (1) */
+} /* token */
+
+
+/*
+ * plonk() gives an appropriate error message if a token is incorrect
+ */
+static void
+plonk(tok)
+	int tok;
+{
+    panic((tok == EOF) ? "incomplete time"
+		       : "garbled time");
+} /* plonk */
+
+
+/* 
+ * expect() gets a token and dies most horribly if it's not the token we want
+ */
+static void
+expect(desired)
+	int desired;
+{
+    if (token() != desired)
+	plonk(sc_tokid);	/* and we die here... */
+} /* expect */
+
+
+/*
+ * dateadd() adds a number of minutes to a date.  It is extraordinarily
+ * stupid regarding day-of-month overflow, and will most likely not
+ * work properly
+ */
+static void
+dateadd(minutes, tm)
+	int minutes;
+	struct tm *tm;
+{
+    /* increment days */
+
+    while (minutes > 24*60) {
+	minutes -= 24*60;
+	tm->tm_mday++;
+    }
+
+    /* increment hours */
+    while (minutes > 60) {
+	minutes -= 60;
+	tm->tm_hour++;
+	if (tm->tm_hour > 23) {
+	    tm->tm_mday++;
+	    tm->tm_hour = 0;
+	}
+    }
+
+    /* increment minutes */
+    tm->tm_min += minutes;
+
+    if (tm->tm_min > 59) {
+	tm->tm_hour++;
+	tm->tm_min -= 60;
+
+	if (tm->tm_hour > 23) {
+	    tm->tm_mday++;
+	    tm->tm_hour = 0;
+	}
+    }
+} /* dateadd */
+
+
+/*
+ * plus() parses a now + time
+ *
+ *  at [NOW] PLUS NUMBER [MINUTES|HOURS|DAYS|WEEKS]
+ *
+ */
+static void
+plus(tm)
+	struct tm *tm;
+{
+    int delay;
+
+    expect(NUMBER);
+
+    delay = atoi(sc_token);
+
+    switch (token()) {
+    case WEEKS:
+	    delay *= 7;
+    case DAYS:
+	    delay *= 24;
+    case HOURS:
+	    delay *= 60;
+    case MINUTES:
+	    dateadd(delay, tm);
+	    return;
+    }
+    plonk(sc_tokid);
+} /* plus */
+
+
+/*
+ * tod() computes the time of day
+ *     [NUMBER [DOT NUMBER] [AM|PM]]
+ */
+static void
+tod(tm)
+	struct tm *tm;
+{
+    int hour, minute = 0;
+    int tlen;
+
+    hour = atoi(sc_token);
+    tlen = strlen(sc_token);
+
+    /*
+     * first pick out the time of day - if it's 4 digits, we assume
+     * a HHMM time, otherwise it's HH DOT MM time
+     */
+    if (token() == DOT) {
+	expect(NUMBER);
+	minute = atoi(sc_token);
+	if (minute > 59)
+	    panic("garbled time");
+	token();
+    } else if (tlen == 4) {
+	minute = hour%100;
+	if (minute > 59)
+	    panic("garbeld time");
+	hour = hour/100;
+    }
+
+    /*
+     * check if an AM or PM specifier was given
+     */
+    if (sc_tokid == AM || sc_tokid == PM) {
+	if (hour > 12)
+	    panic("garbled time");
+
+	if (sc_tokid == PM)
+	    hour += 12;
+	token();
+    } else if (hour > 23)
+	panic("garbled time");
+
+    /*
+     * if we specify an absolute time, we don't want to bump the day even
+     * if we've gone past that time - but if we're specifying a time plus
+     * a relative offset, it's okay to bump things
+     */
+    if ((sc_tokid == EOF || sc_tokid == PLUS) && tm->tm_hour > hour)
+	tm->tm_mday++;
+
+    tm->tm_hour = hour;
+    tm->tm_min = minute;
+    if (tm->tm_hour == 24) {
+	tm->tm_hour = 0;
+	tm->tm_mday++;
+    }
+} /* tod */
+
+
+/*
+ * assign_date() assigns a date, wrapping to next year if needed
+ */
+static void
+assign_date(tm, mday, mon, year)
+	struct tm *tm;
+	long mday, mon, year;
+{
+    if (year > 99) {
+	if (year > 1899)
+	    year -= 1900;
+	else
+	    panic("garbled time");
+    }
+
+    if (year < 0 &&
+	(tm->tm_mon > mon ||(tm->tm_mon == mon && tm->tm_mday > mday)))
+	year = tm->tm_year + 1;
+
+    tm->tm_mday = mday;
+    tm->tm_mon = mon;
+
+    if (year >= 0)
+	tm->tm_year = year;
+} /* assign_date */
+
+
+/* 
+ * month() picks apart a month specification
+ *
+ *  /[<month> NUMBER [NUMBER]]           \
+ *  |[TOMORROW]                          |
+ *  |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
+ *  \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
+ */
+static void
+month(tm)
+	struct tm *tm;
+{
+    long year= (-1);
+    long mday, mon;
+    int tlen;
+
+    switch (sc_tokid) {
+    case PLUS:
+	    plus(tm);
+	    break;
+
+    case TOMORROW:
+	    /* do something tomorrow */
+	    tm->tm_mday ++;
+    case TODAY:	/* force ourselves to stay in today - no further processing */
+	    token();
+	    break;
+
+    case JAN: case FEB: case MAR: case APR: case MAY: case JUN:
+    case JUL: case AUG: case SEP: case OCT: case NOV: case DEC:
+	    /*
+	     * do month mday [year]
+	     */
+	    mon = (sc_tokid-JAN);
+	    expect(NUMBER);
+	    mday = atol(sc_token)-1;
+	    if (token() == NUMBER) {
+		year = atol(sc_token);
+		token();
+	    }
+	    assign_date(tm, mday, mon, year);
+	    break;
+
+    case NUMBER:
+	    /*
+	     * get numeric MMDDYY, mm/dd/yy, or dd.mm.yy
+	     */
+	    tlen = strlen(sc_token);
+	    mon = atol(sc_token);
+	    token();
+
+	    if (sc_tokid == SLASH || sc_tokid == DOT) {
+		int sep;
+
+		sep = sc_tokid;
+		expect(NUMBER);
+		mday = atol(sc_token);
+		if (token() == sep) {
+		    expect(NUMBER);
+		    year = atol(sc_token);
+		    token();
+		}
+
+		/*
+		 * flip months and days for european timing
+		 */
+		if (sep == DOT) {
+		    int x = mday;
+		    mday = mon;
+		    mon = x;
+		}
+	    } else if (tlen == 6 || tlen == 8) {
+		if (tlen == 8) {
+		    year = (mon % 10000) - 1900;
+		    mon /= 10000;
+		} else {
+		    year = mon % 100;
+		    mon /= 100;
+		}
+		mday = mon % 100;
+		mon /= 100;
+	    } else
+		panic("garbled time");
+
+	    mon--;
+	    if (mon < 0 || mon > 11 || mday < 1 || mday > 31)
+		panic("garbled time");
+
+	    assign_date(tm, mday, mon, year);
+	    break;
+    } /* case */
+} /* month */
+
+
+/* Global functions */
+
+time_t
+parsetime(argc, argv)
+	int argc;
+	char **argv;
+{
+/*
+ * Do the argument parsing, die if necessary, and return the time the job
+ * should be run.
+ */
+    time_t nowtimer, runtimer;
+    struct tm nowtime, runtime;
+    int hr = 0;
+    /* this MUST be initialized to zero for midnight/noon/teatime */
+
+    nowtimer = time(NULL);
+    nowtime = *localtime(&nowtimer);
+
+    runtime = nowtime;
+    runtime.tm_sec = 0;
+    runtime.tm_isdst = 0;
+
+    if (argc <= optind)
+	usage();
+
+    init_scanner(argc-optind, argv+optind);
+
+    switch (token()) {
+    case NOW:	/* now is optional prefix for PLUS tree */
+	    expect(PLUS);
+    case PLUS:
+	    plus(&runtime);
+	    break;
+
+    case NUMBER:
+	    tod(&runtime);
+	    month(&runtime);
+	    break;
+
+	    /*
+	     * evil coding for TEATIME|NOON|MIDNIGHT - we've initialised
+	     * hr to zero up above, then fall into this case in such a
+	     * way so we add +12 +4 hours to it for teatime, +12 hours
+	     * to it for noon, and nothing at all for midnight, then
+	     * set our runtime to that hour before leaping into the
+	     * month scanner
+	     */
+    case TEATIME:
+	    hr += 4;
+    case NOON:
+	    hr += 12;
+    case MIDNIGHT:
+	    if (runtime.tm_hour >= hr)
+		runtime.tm_mday++;
+	    runtime.tm_hour = hr;
+	    runtime.tm_min = 0;
+	    token();
+	    /* fall through to month setting */
+    default:
+	    month(&runtime);
+	    break;
+    } /* ugly case statement */
+    expect(EOF);
+
+    /*
+     * adjust for daylight savings time
+     */
+    runtime.tm_isdst = -1;
+    runtimer = mktime(&runtime);
+    if (runtime.tm_isdst > 0) {
+	runtimer -= 3600;
+	runtimer = mktime(&runtime);
+    }
+
+    if (runtimer < 0)
+	panic("garbled time");
+
+    if (nowtimer > runtimer)
+	panic("Trying to travel back in time");
+
+    return runtimer;
+} /* parsetime */