diff options
Diffstat (limited to 'src/ipaddrcheck.c')
| -rw-r--r-- | src/ipaddrcheck.c | 79 |
1 files changed, 48 insertions, 31 deletions
diff --git a/src/ipaddrcheck.c b/src/ipaddrcheck.c index 26d0dcc..34c95a3 100644 --- a/src/ipaddrcheck.c +++ b/src/ipaddrcheck.c @@ -80,7 +80,7 @@ static const struct option options[] = }; /* Auxillary functions */ -static void print_help(void); +static void print_help(const char* program_name); static void print_version(void); int main(int argc, char* argv[]) @@ -95,6 +95,8 @@ int main(int argc, char* argv[]) int allow_loopback = NO_LOOPBACK; /* Allow IPv4 loopback in --is-valid-intf-address */ + const char* program_name = argv[0]; /* Program name for use in messages */ + /* Parse options, convert to action codes, store in array */ @@ -179,13 +181,15 @@ int main(int argc, char* argv[]) action = NO_ACTION; break; case '?': - print_help(); - return(0); + print_help(program_name); + return(EXIT_SUCCESS); case 'z': print_version(); - return(0); + return(EXIT_SUCCESS); default: fprintf(stderr, "Error: invalid option\n"); + print_help(program_name); + return(EXIT_FAILURE); break; } @@ -201,7 +205,7 @@ int main(int argc, char* argv[]) else { fprintf(stderr, "Error: wrong number of arguments, one argument required!\n"); - print_help(); + print_help(program_name); return(EXIT_FAILURE); } @@ -316,33 +320,46 @@ int main(int argc, char* argv[]) /* * Print help, no other side effects */ -void print_help(void) +void print_help(const char* program_name) { - static const char *message = \ -"--is-valid STR Check if STR is a valid IPv4 or IPv6 address\n\ - or subnet\n\ ---is-ipv4 STR Check if STR is a valid IPv4 address with mask \n\ ---is-ipv4-cidr STR Check if STR is a valid CIDR-formatted address \n\ ---is-ipv4-single Check if STR is a valid single address (i.e. with no mask) \n\ ---is-ipv4-host Check if STR is a host address \n\ ---is-ipv4-net Check if STR is a network address \n\ ---is-ipv4-broadcast Check if STR is a broadcast address \n\ ---is-ipv4-multicast Check if STR is a multicast address \n\ ---is-ipv4-loopback Check if STR is a loopback address \n\ ---is-ipv4-link-local Check if STR is a link-local address \n\ ---is-ipv4-rfc1918 Check if STR is a private (RFC1918) address \n\ ---is-ipv6 Check if STR is a valid IPv6 address \n\ ---is-ipv6-cidr Check if STR is a CIDR-formatted IPv6 address \n\ ---is-ipv6-single Check if STR is an IPv6 address with no mask \n\ ---is-ipv6-host Check if STR is an IPv6 host address \n\ ---is-ipv6-net Check if STR is an IPv6 network address \n\ ---is-ipv6-multicast Check if STR is an IPv6 multicast address \n\ ---is-ipv6-link-local Check if STR is an IPv6 link-local address \n\ ---is-valid-intf-address Check if STR is an IPv4 or IPv6 address that can be used assigned to a network interface \n\ ---version Print version information and exit \n\ ---help Print this message and exit"; - - printf("%s", message); + printf("Usage: %s <OPTIONS> [STRING]\n", program_name); + printf("\ + --is-valid Check if STRING is a valid IPv4 or IPv6 address\n\ + or subnet\n\ + --is-any-cidr Check if STRING is a valid IPv4 or IPv6 address\n\ + with prefix length\n\ + --is-any-single Check if STRING is a valid single IPv4 or IPv6 address\n\ + --is-ipv4 Check if STRING is a valid IPv4 address with mask \n\ + --is-ipv4-cidr Check if STRING is a valid CIDR-formatted address \n\ + --is-ipv4-single Check if STRING is a valid single address\n\ + (i.e. with no mask)\n\ + --is-ipv4-host Check if STRING is a host address \n\ + --is-ipv4-net Check if STRING is a network address \n\ + --is-ipv4-broadcast Check if STRING is a broadcast address \n\ + --is-ipv4-multicast Check if STRING is a multicast address \n\ + --is-ipv4-loopback Check if STRING is a loopback address \n\ + --is-ipv4-link-local Check if STRING is a link-local address \n\ + --is-ipv4-rfc1918 Check if STRING is a private (RFC1918) address \n\ + --is-ipv6 Check if STRING is a valid IPv6 address \n\ + --is-ipv6-cidr Check if STRING is a CIDR-formatted IPv6 address \n\ + --is-ipv6-single Check if STRING is an IPv6 address with no mask \n\ + --is-ipv6-host Check if STRING is an IPv6 host address \n\ + --is-ipv6-net Check if STRING is an IPv6 network address \n\ + --is-ipv6-multicast Check if STRING is an IPv6 multicast address \n\ + --is-ipv6-link-local Check if STRING is an IPv6 link-local address \n\ + --is-valid-intf-address Check if STRING is an IPv4 or IPv6 address that \n\ + can be assigned to a network interface \n\ + --allow-loopback When used with --is-valid-intf-address,\n\ + makes IPv4 loopback addresses pass the check\n\ + --version Print version information and exit \n\ + --help Print this message and exit\n\ +\n\ +Exit codes:\n\ + 0 if check passed,\n\ + 1 if check failed,\n\ + 2 if a problem occured (wrong option, internal error etc.)\n\ +\n\ +See \"man %s\" for details.\n", PACKAGE); } /* |