Sprintf issue

[Pavel Tsekov]

Hello Jorge,

Please, can you check the return value of the system () call ? Also
are you trying to run the compiled program from the cygwin shell or
from the windows command prompt ? Output of cygcheck -r -s -v would
be vuseful too. This is a problem which was brought to the mailing
list some time ago though solution was not found then.

Monday, February 18, 2002, 11:25:09 AM, you wrote:

JG> Hi, i tried to modified a C program running on linux and make it running on 
JG> windows with gcc for cygwin:
JG> like this:
JG>  sprintf(arpbuf, "arp -s %s `echo %s | sed -e s/:/-/g`"
JG>          piaddr (lease -> ip_addr),
JG>          print_hw_addr (lease -> hardware_addr.htype,
JG>                         lease -> hardware_addr.hlen,
JG>                         lease -> hardware_addr.haddr));
JG>  note(arpbuf);
JG>  system(arpbuf);
JG> }

JG> and the original was:

JG>  sprintf(arpbuf, "arp -s %s  %s ",
JG>          piaddr (lease -> ip_addr),
JG>          print_hw_addr (lease -> hardware_addr.htype,
JG>                         lease -> hardware_addr.hlen,
JG>                         lease -> hardware_addr.haddr));
JG>  note(arpbuf);
JG>  system(arpbuf);
JG> }

JG> but my second %s was with the following format XX:XX:XX:XX:XX:XX and i would 
JG> replace it by XX-XX-XX-XX-XX-XX.
JG> I tried sed but it didn't work.Why? it seem not to be interpreted I have :
JG> arp -s 192.40.54.42 `echo 00:80:9f:2e:3f:5e | sed -e s/:/-/g`

JG> Could i do it in pure C?Thanks for your precious help.


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