is there something wrong with this?...

Thread View: comp.os.msdos.djgpp

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3 total messages Started by informix Fri, 29 Dec 1995 06:20

Author: informix
Date: Fri, 29 Dec 1995 06:20

17 lines
774 bytes

...
	while((fgets(temp,120,fp))!=NULL) {
		sscanf(temp,"%s:%s:%*s:%*s:%*s:%*s:%*s",sent[x].name,
			sent[x].passwd);
		++x;
	}
...

	this was meant to read a unix password file (/etc/passwd) and
	extract the username and encrypted password field...

	can someone tell me why this is not working as planned?... it worked
	on a shitty compiler... i recently installed djgpp...

	should i be doing to a better way?... is it portable?...

Ron!

Re: is there something wrong with this?...

Author: Kurt Watzka
Date: Fri, 29 Dec 1995 11:19

36 lines
1545 bytes

oracle@veenet.value.net (informix) writes:

>...
>	while((fgets(temp,120,fp))!=NULL) {
>		sscanf(temp,"%s:%s:%*s:%*s:%*s:%*s:%*s",sent[x].name,
>			sent[x].passwd);
>		++x;
>	}
>...

>	this was meant to read a unix password file (/etc/passwd) and
>	extract the username and encrypted password field...

>	can someone tell me why this is not working as planned?... it worked
>	on a shitty compiler... i recently installed djgpp...

The "%s" format string does not imply that a colon is not part of a 
"string". You probably want something like

   while (fgets(temp,120,fp)) {
      if (2 != sscanf(temp,"%[^:]:%[^:]",sent[x].name, sent[x].passwd))
         printf("error in line %d\n", x + 1);
      ++x;
   }

>	should i be doing to a better way?... is it portable?...

If you want to use C, and not a language that was designed for this kind
of work, you can use scan sets. They are portable, as long as you have
an ANSI C compiler.

Kurt
--
| Kurt Watzka                             Phone : +49-89-2180-6254
| watzka@stat.uni-muenchen.de
| ua302aa@sunmail.lrz-muenchen.de

Re: is there something wrong with this?...

#11

Author: Graham Broadbridge
Date: Wed, 10 Jan 1996 09:45

13 lines
1068 bytes

: 	can someone tell me why this is not working as planned?... it worked
: 	on a shitty compiler... i recently installed djgpp...

: 	should i be doing to a better way?... is it portable?...

Why not just use the getpwent() function?

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