[quote]
bash-2.05b$ uname -osr ; gcc --version
Linux 2.4.22 GNU/Linux
gcc (GCC) 3.2.3

bash-2.05b$ make
gcc -Wall -ggdb -c main.c
gcc main.o libs/isock.o libs/cmdline.c -o ircclient
bash-2.05b$ ./ircclient
Using default configuration file: bot.cfg...
$connect -s test
test

$connect -s test2
$connect test
Segmentation fault
bash-2.05b$
[/quote]

I'm trying to use getopt() to parse a commandline I created within the program. It works fine the first time through, but has problems the second time through. I'm not much of a programmer, so I've probably missed something fundamental. Any input is appreciated. If invocation code is necessary let me know, I tried to limit the length of the message. (For some reason phpbb screws up the indentation on the case in the switch statement.)

[code]
void com (char *buf, int buflen) {
int b = 0;
int option = 0;
int argn = 0;
char *args[16];
char *p = strtok(buf, " ");
for (; p; p = strtok(NULL, " "), argn++) {
if (argn <= (sizeof(args)/4)) {
args[argn] = p;
} else {
puts("Maximum of 17 parameters.");
b = 1;
}
}

if (!b && !strncmp(buf, "connect", 7)) {
while ((option = getopt(argn, args, "s:")) != EOF) {
switch (option) {
case 's' :
strcpy(server, optarg);
puts(server);
break;
default:
break;
}
}
}
}
[/code]

I just read the getopt man page, and I don't see a way of telling it to restart the scan? Maybe that's the problem?

You could also try [ code ] tags, and see if those work any better than [ quote ].

I fixed it by setting the external integer optind to 0 per iteration of the function, or 'restarting the scan'. Thanks for the insight =)

man 3 getopt:

[quote]
If there are no more option characters, getopt() returns -1. Then optind is the index in argv of the first argv-element that is not an option.
[/quote]