summaryrefslogtreecommitdiffstats
path: root/usr.sbin/cron/lib/entry.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr.sbin/cron/lib/entry.c')
-rw-r--r--usr.sbin/cron/lib/entry.c644
1 files changed, 0 insertions, 644 deletions
diff --git a/usr.sbin/cron/lib/entry.c b/usr.sbin/cron/lib/entry.c
deleted file mode 100644
index b6be69c..0000000
--- a/usr.sbin/cron/lib/entry.c
+++ /dev/null
@@ -1,644 +0,0 @@
-/* Copyright 1988,1990,1993,1994 by Paul Vixie
- * All rights reserved
- *
- * Distribute freely, except: don't remove my name from the source or
- * documentation (don't take credit for my work), mark your changes (don't
- * get me blamed for your possible bugs), don't alter or remove this
- * notice. May be sold if buildable source is provided to buyer. No
- * warrantee of any kind, express or implied, is included with this
- * software; use at your own risk, responsibility for damages (if any) to
- * anyone resulting from the use of this software rests entirely with the
- * user.
- *
- * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
- * I'll try to keep a version up to date. I can be reached as follows:
- * Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
- */
-
-#if !defined(lint) && !defined(LINT)
-static const char rcsid[] =
- "$FreeBSD$";
-#endif
-
-/* vix 26jan87 [RCS'd; rest of log is in RCS file]
- * vix 01jan87 [added line-level error recovery]
- * vix 31dec86 [added /step to the from-to range, per bob@acornrc]
- * vix 30dec86 [written]
- */
-
-
-#include "cron.h"
-#include <grp.h>
-#ifdef LOGIN_CAP
-#include <login_cap.h>
-#endif
-
-typedef enum ecode {
- e_none, e_minute, e_hour, e_dom, e_month, e_dow,
- e_cmd, e_timespec, e_username, e_group, e_mem
-#ifdef LOGIN_CAP
- , e_class
-#endif
-} ecode_e;
-
-static char get_list(bitstr_t *, int, int, char *[], int, FILE *),
- get_range(bitstr_t *, int, int, char *[], int, FILE *),
- get_number(int *, int, char *[], int, FILE *);
-static int set_element(bitstr_t *, int, int, int);
-
-static char *ecodes[] =
- {
- "no error",
- "bad minute",
- "bad hour",
- "bad day-of-month",
- "bad month",
- "bad day-of-week",
- "bad command",
- "bad time specifier",
- "bad username",
- "bad group name",
- "out of memory",
-#ifdef LOGIN_CAP
- "bad class name",
-#endif
- };
-
-
-void
-free_entry(e)
- entry *e;
-{
-#ifdef LOGIN_CAP
- if (e->class != NULL)
- free(e->class);
-#endif
- if (e->cmd != NULL)
- free(e->cmd);
- if (e->envp != NULL)
- env_free(e->envp);
- free(e);
-}
-
-
-/* return NULL if eof or syntax error occurs;
- * otherwise return a pointer to a new entry.
- */
-entry *
-load_entry(file, error_func, pw, envp)
- FILE *file;
- void (*error_func)(char *);
- struct passwd *pw;
- char **envp;
-{
- /* this function reads one crontab entry -- the next -- from a file.
- * it skips any leading blank lines, ignores comments, and returns
- * EOF if for any reason the entry can't be read and parsed.
- *
- * the entry is also parsed here.
- *
- * syntax:
- * user crontab:
- * minutes hours doms months dows cmd\n
- * system crontab (/etc/crontab):
- * minutes hours doms months dows USERNAME cmd\n
- */
-
- ecode_e ecode = e_none;
- entry *e;
- int ch;
- char cmd[MAX_COMMAND];
- char envstr[MAX_ENVSTR];
- char **prev_env;
-
- Debug(DPARS, ("load_entry()...about to eat comments\n"))
-
- skip_comments(file);
-
- ch = get_char(file);
- if (ch == EOF)
- return NULL;
-
- /* ch is now the first useful character of a useful line.
- * it may be an @special or it may be the first character
- * of a list of minutes.
- */
-
- e = (entry *) calloc(sizeof(entry), sizeof(char));
-
- if (e == NULL) {
- warn("load_entry: calloc failed");
- return NULL;
- }
-
- if (ch == '@') {
- /* all of these should be flagged and load-limited; i.e.,
- * instead of @hourly meaning "0 * * * *" it should mean
- * "close to the front of every hour but not 'til the
- * system load is low". Problems are: how do you know
- * what "low" means? (save me from /etc/cron.conf!) and:
- * how to guarantee low variance (how low is low?), which
- * means how to we run roughly every hour -- seems like
- * we need to keep a history or let the first hour set
- * the schedule, which means we aren't load-limited
- * anymore. too much for my overloaded brain. (vix, jan90)
- * HINT
- */
- Debug(DPARS, ("load_entry()...about to test shortcuts\n"))
- ch = get_string(cmd, MAX_COMMAND, file, " \t\n");
- if (!strcmp("reboot", cmd)) {
- Debug(DPARS, ("load_entry()...reboot shortcut\n"))
- e->flags |= WHEN_REBOOT;
- } else if (!strcmp("yearly", cmd) || !strcmp("annually", cmd)){
- Debug(DPARS, ("load_entry()...yearly shortcut\n"))
- bit_set(e->minute, 0);
- bit_set(e->hour, 0);
- bit_set(e->dom, 0);
- bit_set(e->month, 0);
- bit_nset(e->dow, 0, (LAST_DOW-FIRST_DOW+1));
- e->flags |= DOW_STAR;
- } else if (!strcmp("monthly", cmd)) {
- Debug(DPARS, ("load_entry()...monthly shortcut\n"))
- bit_set(e->minute, 0);
- bit_set(e->hour, 0);
- bit_set(e->dom, 0);
- bit_nset(e->month, 0, (LAST_MONTH-FIRST_MONTH+1));
- bit_nset(e->dow, 0, (LAST_DOW-FIRST_DOW+1));
- e->flags |= DOW_STAR;
- } else if (!strcmp("weekly", cmd)) {
- Debug(DPARS, ("load_entry()...weekly shortcut\n"))
- bit_set(e->minute, 0);
- bit_set(e->hour, 0);
- bit_nset(e->dom, 0, (LAST_DOM-FIRST_DOM+1));
- e->flags |= DOM_STAR;
- bit_nset(e->month, 0, (LAST_MONTH-FIRST_MONTH+1));
- bit_set(e->dow, 0);
- } else if (!strcmp("daily", cmd) || !strcmp("midnight", cmd)) {
- Debug(DPARS, ("load_entry()...daily shortcut\n"))
- bit_set(e->minute, 0);
- bit_set(e->hour, 0);
- bit_nset(e->dom, 0, (LAST_DOM-FIRST_DOM+1));
- bit_nset(e->month, 0, (LAST_MONTH-FIRST_MONTH+1));
- bit_nset(e->dow, 0, (LAST_DOW-FIRST_DOW+1));
- } else if (!strcmp("hourly", cmd)) {
- Debug(DPARS, ("load_entry()...hourly shortcut\n"))
- bit_set(e->minute, 0);
- bit_nset(e->hour, 0, (LAST_HOUR-FIRST_HOUR+1));
- bit_nset(e->dom, 0, (LAST_DOM-FIRST_DOM+1));
- bit_nset(e->month, 0, (LAST_MONTH-FIRST_MONTH+1));
- bit_nset(e->dow, 0, (LAST_DOW-FIRST_DOW+1));
- } else {
- ecode = e_timespec;
- goto eof;
- }
- /* Advance past whitespace between shortcut and
- * username/command.
- */
- Skip_Blanks(ch, file);
- if (ch == EOF) {
- ecode = e_cmd;
- goto eof;
- }
- } else {
- Debug(DPARS, ("load_entry()...about to parse numerics\n"))
-
- ch = get_list(e->minute, FIRST_MINUTE, LAST_MINUTE,
- PPC_NULL, ch, file);
- if (ch == EOF) {
- ecode = e_minute;
- goto eof;
- }
-
- /* hours
- */
-
- ch = get_list(e->hour, FIRST_HOUR, LAST_HOUR,
- PPC_NULL, ch, file);
- if (ch == EOF) {
- ecode = e_hour;
- goto eof;
- }
-
- /* DOM (days of month)
- */
-
- if (ch == '*')
- e->flags |= DOM_STAR;
- ch = get_list(e->dom, FIRST_DOM, LAST_DOM,
- PPC_NULL, ch, file);
- if (ch == EOF) {
- ecode = e_dom;
- goto eof;
- }
-
- /* month
- */
-
- ch = get_list(e->month, FIRST_MONTH, LAST_MONTH,
- MonthNames, ch, file);
- if (ch == EOF) {
- ecode = e_month;
- goto eof;
- }
-
- /* DOW (days of week)
- */
-
- if (ch == '*')
- e->flags |= DOW_STAR;
- ch = get_list(e->dow, FIRST_DOW, LAST_DOW,
- DowNames, ch, file);
- if (ch == EOF) {
- ecode = e_dow;
- goto eof;
- }
- }
-
- /* make sundays equivilent */
- if (bit_test(e->dow, 0) || bit_test(e->dow, 7)) {
- bit_set(e->dow, 0);
- bit_set(e->dow, 7);
- }
-
- /* ch is the first character of a command, or a username */
- unget_char(ch, file);
-
- if (!pw) {
- char *username = cmd; /* temp buffer */
- char *s;
- struct group *grp;
-#ifdef LOGIN_CAP
- login_cap_t *lc;
-#endif
-
- Debug(DPARS, ("load_entry()...about to parse username\n"))
- ch = get_string(username, MAX_COMMAND, file, " \t");
-
- Debug(DPARS, ("load_entry()...got %s\n",username))
- if (ch == EOF) {
- ecode = e_cmd;
- goto eof;
- }
-
-#ifdef LOGIN_CAP
- if ((s = strrchr(username, '/')) != NULL) {
- *s = '\0';
- e->class = strdup(s + 1);
- if (e->class == NULL)
- warn("strdup(\"%s\")", s + 1);
- } else {
- e->class = strdup(RESOURCE_RC);
- if (e->class == NULL)
- warn("strdup(\"%s\")", RESOURCE_RC);
- }
- if (e->class == NULL) {
- ecode = e_mem;
- goto eof;
- }
- if ((lc = login_getclass(e->class)) == NULL) {
- ecode = e_class;
- goto eof;
- }
- login_close(lc);
-#endif
- grp = NULL;
- if ((s = strrchr(username, ':')) != NULL) {
- *s = '\0';
- if ((grp = getgrnam(s + 1)) == NULL) {
- ecode = e_group;
- goto eof;
- }
- }
-
- pw = getpwnam(username);
- if (pw == NULL) {
- ecode = e_username;
- goto eof;
- }
- if (grp != NULL)
- pw->pw_gid = grp->gr_gid;
- Debug(DPARS, ("load_entry()...uid %d, gid %d\n",pw->pw_uid,pw->pw_gid))
-#ifdef LOGIN_CAP
- Debug(DPARS, ("load_entry()...class %s\n",e->class))
-#endif
- }
-
-#ifndef PAM /* PAM takes care of account expiration by itself */
- if (pw->pw_expire && time(NULL) >= pw->pw_expire) {
- ecode = e_username;
- goto eof;
- }
-#endif /* !PAM */
-
- e->uid = pw->pw_uid;
- e->gid = pw->pw_gid;
-
- /* copy and fix up environment. some variables are just defaults and
- * others are overrides.
- */
- e->envp = env_copy(envp);
- if (e->envp == NULL) {
- warn("env_copy");
- ecode = e_mem;
- goto eof;
- }
- if (!env_get("SHELL", e->envp)) {
- prev_env = e->envp;
- sprintf(envstr, "SHELL=%s", _PATH_BSHELL);
- e->envp = env_set(e->envp, envstr);
- if (e->envp == NULL) {
- warn("env_set(%s)", envstr);
- env_free(prev_env);
- ecode = e_mem;
- goto eof;
- }
- }
- if (!env_get("HOME", e->envp)) {
- prev_env = e->envp;
- sprintf(envstr, "HOME=%s", pw->pw_dir);
- e->envp = env_set(e->envp, envstr);
- if (e->envp == NULL) {
- warn("env_set(%s)", envstr);
- env_free(prev_env);
- ecode = e_mem;
- goto eof;
- }
- }
- if (!env_get("PATH", e->envp)) {
- prev_env = e->envp;
- sprintf(envstr, "PATH=%s", _PATH_DEFPATH);
- e->envp = env_set(e->envp, envstr);
- if (e->envp == NULL) {
- warn("env_set(%s)", envstr);
- env_free(prev_env);
- ecode = e_mem;
- goto eof;
- }
- }
- prev_env = e->envp;
- sprintf(envstr, "%s=%s", "LOGNAME", pw->pw_name);
- e->envp = env_set(e->envp, envstr);
- if (e->envp == NULL) {
- warn("env_set(%s)", envstr);
- env_free(prev_env);
- ecode = e_mem;
- goto eof;
- }
-#if defined(BSD)
- prev_env = e->envp;
- sprintf(envstr, "%s=%s", "USER", pw->pw_name);
- e->envp = env_set(e->envp, envstr);
- if (e->envp == NULL) {
- warn("env_set(%s)", envstr);
- env_free(prev_env);
- ecode = e_mem;
- goto eof;
- }
-#endif
-
- Debug(DPARS, ("load_entry()...about to parse command\n"))
-
- /* Everything up to the next \n or EOF is part of the command...
- * too bad we don't know in advance how long it will be, since we
- * need to malloc a string for it... so, we limit it to MAX_COMMAND.
- * XXX - should use realloc().
- */
- ch = get_string(cmd, MAX_COMMAND, file, "\n");
-
- /* a file without a \n before the EOF is rude, so we'll complain...
- */
- if (ch == EOF) {
- ecode = e_cmd;
- goto eof;
- }
-
- /* got the command in the 'cmd' string; save it in *e.
- */
- e->cmd = strdup(cmd);
- if (e->cmd == NULL) {
- warn("strdup(\"%s\")", cmd);
- ecode = e_mem;
- goto eof;
- }
- Debug(DPARS, ("load_entry()...returning successfully\n"))
-
- /* success, fini, return pointer to the entry we just created...
- */
- return e;
-
- eof:
- free_entry(e);
- if (ecode != e_none && error_func)
- (*error_func)(ecodes[(int)ecode]);
- while (ch != EOF && ch != '\n')
- ch = get_char(file);
- return NULL;
-}
-
-
-static char
-get_list(bits, low, high, names, ch, file)
- bitstr_t *bits; /* one bit per flag, default=FALSE */
- int low, high; /* bounds, impl. offset for bitstr */
- char *names[]; /* NULL or *[] of names for these elements */
- int ch; /* current character being processed */
- FILE *file; /* file being read */
-{
- register int done;
-
- /* we know that we point to a non-blank character here;
- * must do a Skip_Blanks before we exit, so that the
- * next call (or the code that picks up the cmd) can
- * assume the same thing.
- */
-
- Debug(DPARS|DEXT, ("get_list()...entered\n"))
-
- /* list = range {"," range}
- */
-
- /* clear the bit string, since the default is 'off'.
- */
- bit_nclear(bits, 0, (high-low+1));
-
- /* process all ranges
- */
- done = FALSE;
- while (!done) {
- ch = get_range(bits, low, high, names, ch, file);
- if (ch == ',')
- ch = get_char(file);
- else
- done = TRUE;
- }
-
- /* exiting. skip to some blanks, then skip over the blanks.
- */
- Skip_Nonblanks(ch, file)
- Skip_Blanks(ch, file)
-
- Debug(DPARS|DEXT, ("get_list()...exiting w/ %02x\n", ch))
-
- return ch;
-}
-
-
-static char
-get_range(bits, low, high, names, ch, file)
- bitstr_t *bits; /* one bit per flag, default=FALSE */
- int low, high; /* bounds, impl. offset for bitstr */
- char *names[]; /* NULL or names of elements */
- int ch; /* current character being processed */
- FILE *file; /* file being read */
-{
- /* range = number | number "-" number [ "/" number ]
- */
-
- register int i;
- auto int num1, num2, num3;
-
- Debug(DPARS|DEXT, ("get_range()...entering, exit won't show\n"))
-
- if (ch == '*') {
- /* '*' means "first-last" but can still be modified by /step
- */
- num1 = low;
- num2 = high;
- ch = get_char(file);
- if (ch == EOF)
- return EOF;
- } else {
- if (EOF == (ch = get_number(&num1, low, names, ch, file)))
- return EOF;
-
- if (ch == '/')
- num2 = high;
- else if (ch != '-') {
- /* not a range, it's a single number.
- */
- if (EOF == set_element(bits, low, high, num1))
- return EOF;
- return ch;
- } else {
- /* eat the dash
- */
- ch = get_char(file);
- if (ch == EOF)
- return EOF;
-
- /* get the number following the dash
- */
- ch = get_number(&num2, low, names, ch, file);
- if (ch == EOF)
- return EOF;
- }
- }
-
- /* check for step size
- */
- if (ch == '/') {
- /* eat the slash
- */
- ch = get_char(file);
- if (ch == EOF)
- return EOF;
-
- /* get the step size -- note: we don't pass the
- * names here, because the number is not an
- * element id, it's a step size. 'low' is
- * sent as a 0 since there is no offset either.
- */
- ch = get_number(&num3, 0, PPC_NULL, ch, file);
- if (ch == EOF || num3 == 0)
- return EOF;
- } else {
- /* no step. default==1.
- */
- num3 = 1;
- }
-
- /* range. set all elements from num1 to num2, stepping
- * by num3. (the step is a downward-compatible extension
- * proposed conceptually by bob@acornrc, syntactically
- * designed then implmented by paul vixie).
- */
- for (i = num1; i <= num2; i += num3)
- if (EOF == set_element(bits, low, high, i))
- return EOF;
-
- return ch;
-}
-
-
-static char
-get_number(numptr, low, names, ch, file)
- int *numptr; /* where does the result go? */
- int low; /* offset applied to result if symbolic enum used */
- char *names[]; /* symbolic names, if any, for enums */
- int ch; /* current character */
- FILE *file; /* source */
-{
- char temp[MAX_TEMPSTR], *pc;
- int len, i, all_digits;
-
- /* collect alphanumerics into our fixed-size temp array
- */
- pc = temp;
- len = 0;
- all_digits = TRUE;
- while (isalnum(ch)) {
- if (++len >= MAX_TEMPSTR)
- return EOF;
-
- *pc++ = ch;
-
- if (!isdigit(ch))
- all_digits = FALSE;
-
- ch = get_char(file);
- }
- *pc = '\0';
- if (len == 0)
- return (EOF);
-
- /* try to find the name in the name list
- */
- if (names) {
- for (i = 0; names[i] != NULL; i++) {
- Debug(DPARS|DEXT,
- ("get_num, compare(%s,%s)\n", names[i], temp))
- if (!strcasecmp(names[i], temp)) {
- *numptr = i+low;
- return ch;
- }
- }
- }
-
- /* no name list specified, or there is one and our string isn't
- * in it. either way: if it's all digits, use its magnitude.
- * otherwise, it's an error.
- */
- if (all_digits) {
- *numptr = atoi(temp);
- return ch;
- }
-
- return EOF;
-}
-
-
-static int
-set_element(bits, low, high, number)
- bitstr_t *bits; /* one bit per flag, default=FALSE */
- int low;
- int high;
- int number;
-{
- Debug(DPARS|DEXT, ("set_element(?,%d,%d,%d)\n", low, high, number))
-
- if (number < low || number > high)
- return EOF;
-
- bit_set(bits, (number-low));
- return OK;
-}
OpenPOWER on IntegriCloud