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Fix parsing of '0' and non-alphanumerics in steps. Previously, an

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entry having stepping value of zero can cause crontab to hang there,
and if the main crontab is being changed in this way, then cron(8)
will keep spining.

Obtained from:	OpenBSD [src/usr.sbin/cron/entry.c,v 1.17]
PR:		68683 (my own, but forgot to commit it...)
MFC After:	1 week
This commit is contained in:
Xin LI 2005-02-14 14:09:21 +00:00
parent 843cfd5ae0
commit d159401da0
1 changed files with 3 additions and 1 deletions
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4
usr.sbin/cron/lib/entry.c
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@ -543,7 +543,7 @@ get_range(bits, low, high, names, ch, file)
* sent as a 0 since there is no offset either. * sent as a 0 since there is no offset either.
*/ */
ch = get_number(&num3, 0, PPC_NULL, ch, file); ch = get_number(&num3, 0, PPC_NULL, ch, file);
if (ch == EOF) if (ch == EOF || num3 == 0)
return EOF; return EOF;
} else { } else {
/* no step. default==1. /* no step. default==1.
@ -592,6 +592,8 @@ get_number(numptr, low, names, ch, file)
ch = get_char(file); ch = get_char(file);
} }
*pc = '\0'; *pc = '\0';
if (len == 0)
return (EOF);
/* try to find the name in the name list /* try to find the name in the name list
*/ */