Don Cohen wrote:
Andre wrote:
Here's a demo of the problem. I enter these commands:
snmptrapd
snmptrap -v 1 -c private 10.0.0.1 TRAP-TEST-MIB::asante 10.0.0.1 6
117 '' SNMPv2-MIB::sysLocation.0 s $'XXX' .1.2.3.4 i 1234
snmptrap -v 1 -c private 10.0.0.1 TRAP-TEST-MIB::asante 10.0.0.1 6
117 '' SNMPv2-MIB::sysLocation.0 s $'XXX, iso.2.3.4 = INTEGER: 1234'
<snip>
The output is the same. The input is different. I should be able to
determine the input from the output.
This problem would be solved if the string were printed with quoting,
e.g., the first output should say
... STRING: "XXX"
and the second
... STRING: "XXX, iso.2.3.4 = INTEGER: 1234"
and if the string contains any "'s or \'s they could be quoted with a
preceding \.
The single quote is removed by the shell (assuming you using *nix). You
will need to put in the backslashes yourself so it is passed as one
argument:
snmptrap -v 1 -c private 10.0.0.1 TRAP-TEST-MIB::asante 10.0.0.1 6117 ''
SNMPv2-MIB::sysLocation.0 s $\'XXX, iso.2.3.4 = INTEGER: 1234\'
Save this as test.c and compile this with 'gcc test.c':
int main(int argc, char *argv[]) {
int i;
for (i=0; i<argc; i++) {
printf("argv: %s\n",argv[i]);
}
return 0;
}
Here is my input and output:
$ ./a.out one '' three 'four' \'five\'
argv: ./a.out
argv: one
argv:
argv: three
argv: four
argv: 'five'
As you can see the '' makes it an empty argument, 'four' is seen as just
four, and \'five\' is seen as 'five'.
Running the above from Windows under a MinGW MSYS shell gives the same
result. Running under a Windows command prompt requires double quotes
instead of single quotes but is otherwise the same.
Alex
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