On 9/21/06, HIToC <hitoc_mail@xxxxxxxx> wrote:
Hello list,
I am using the getdate(3) function to convert a string date in its tm structure, but
I have tried several formats of string-dates and it always returns a NULL pointer.
All this dates I suppose invalid for the getdate(3):
Fri, 19 Nov 82 16:14:55 EST
Wed, 20 Sep 2006 15:03:53 GMT
Thu, 21 Sep 2006 08:59:25 +0400
19 Sep 2006 15:52:25 -0700
19 Sep 2006 15:52:25 EST
Sure, they are valid, but getdate(3) requires a template file to be
present, with each line in the file representing a date format to
parse. From getdate(3):
User-supplied templates are used to parse and interpret the
input string. The templates are text files created by the
user and identified via the environment variable DATEMSK.
Each line in the template represents an acceptable date
and/or time specification using conversion specifications
similar to those used by strftime(3) and strptime(3).
Consider the following example which illustrates the usage of getdate(3)
--- BEGIN script ---
#!/bin/sh
#
# create template file
#
cat >.date <<EOF
%m
%A %B %d, %Y, %H:%M:%S
%A
%B
%m/%d/%y %I %p
%d, %m, %Y %H:%M
at %A the %dst of %B in %Y
run job at %I %p, %B %dnd
&A den %d. %B %Y %H.%M Uhr
EOF
DATEMSK=.date
export DATEMSK
--- END script ---
--- BEGIN C Source ---
#include <stdio.h>
#include <time.h>
#define BUF 512
void daterr(int err) {
switch(err) {
case 1: printf("The DATEMSK environment variable is null or
undefined.\n");
break;
case 2: printf("The template file cannot be opened for reading.\n");
break;
case 3: printf("Failed to get file status information.\n");
break;
case 4: printf("The template file is not a regular file.\n");
break;
case 5: printf("An error is encountered while reading the
template file.\n");
break;
case 6: printf("Memory allocation failed (not enough memory
available.\n");
break;
case 7: printf("There is no line in the template that matches
the input.\n");
break;
case 8: printf("Invalid input specification\n");
break;
default: printf("unknown\n");
}
exit(1);
}
int main(void) {
struct tm *tm;
char buf[BUF];
tm = getdate("09/22/06");
if (getdate_err != 0)
daterr(getdate_err);
strftime(buf,BUF,"%a %Y %H:%M:%S\n",tm);
printf("%s",buf);
return 1;
}
--- END C Source ---
\Steve
--
Steve Grägert <steve@xxxxxxxxxxxx>
Jabber xmpp://graegerts@xxxxxxxxxx
Internet http://eth0.graegert.com, http://blog.graegert.com
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