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Fix outdated informations, typos

README.md

@@ -8,12 +8,12 @@ Providers must be listed in a file, one line should be one provider.
 Empty lines are ignored.
 Lines started with `#` are ignored.
 
-The file name must be passed with the `-p` parameter to the command.
+The file name must be passed with the `-p` parameter to the command or `-` for standard input.
 
 ## Addresses
 
 IP addresses or domain names which needs to be tested against the providers.
-The addresses must be passed with the `-i` parameter to the command. Multipla address can be listed, separate them by comma (`,`).
+The addresses must be passed with the `-i` parameter to the command. Multiple address can be listed, separate them by comma (`,`).
 
 ## Build
 
@@ -23,10 +23,20 @@ go build
 
 ## Execute
 
+Variations for the same operation:
+
 ```sh
 ./dnsbl-check -i 1.2.3.4 -p providers
 ```
 
+```sh
+./dnsbl-check -i 1.2.3.4 -p - < providers
+```
+
+```
+cat providers | ./dnsbl-check -i 1.2.3.4 -p -
+```
+
 ## Output
 
 The program returns every result in a new line, fields are separated by TAB character `\t`.
@@ -37,7 +47,7 @@ The line starts with the status: `OK` or `FAIL` or `ERR`
 - `ERR` returned if the address lookup failed
 Second field is the address
 Third field is the provider
-Fourth field is filled only if the statis is either `FAIL` or `ERR`. If the status is `FAIL` and no reason returned from te provider, the `unknown reason` text will be shown. If the status is `ERR` the error message will be shown here.
+Fourth field is filled only if the status is either `FAIL` or `ERR`. If the status is `FAIL` and no reason returned from te provider, the `unknown reason` text will be shown. If the status is `ERR` the error message will be shown here.
 
 ```
 OK	127.0.0.2	dyn.rbl.polspam.pl
@@ -49,7 +59,7 @@ ERR	127.0.0.2	spam.dnsbl.anonmails.de	lookup 2.0.0.127.spam.dnsbl.anonmails.de o
 
 List of providers coming from http://multirbl.valli.org/list/
 
-To get ipv4 blacklist providers run the following command:
+To get IPv4 blacklist providers run the following command:
 
 ```sh
 awk '$5 == "b" && $2 == "ipv4" && $1 != "(hidden)" { print $1 }' < providers > ipv4providers
@@ -58,7 +68,7 @@ awk '$5 == "b" && $2 == "ipv4" && $1 != "(hidden)" { print $1 }' < providers > i
 Then you can test if a provider is working - responds to a test query:
 
 ```sh
-./dnsbl-check -p ipv4providers -i 127.0.0.2 | awk '$1 == "ERR" { print $3 }' > ipv4verified
+./dnsbl-check -p ipv4providers -i 127.0.0.2 | awk '$1 == "FAIL" { print $3 }' > ipv4verified
 ```
 
 Then with that list you can check if your IP address is blacklisted:
@@ -70,8 +80,8 @@ Then with that list you can check if your IP address is blacklisted:
 It can be piped into one command:
 ```sh
 awk '$5 == "b" && $2 == "ipv4" && $1 != "(hidden)" { print $1 }' < providers | \
-./dnsbl-check -p ipv4providers -i 127.0.0.2 | awk '$1 == "ERR" { print $3 }' | \
-./dnsbl-check -p ip4verified -i 1.2.3.4
+./dnsbl-check -p - -i 127.0.0.2 | awk '$1 == "FAIL" { print $3 }' | \
+./dnsbl-check -p - -i 1.2.3.4
 ```
 
-However it's recommended to keep the used provider list separetly, to save the resources of the providers.
+However it's recommended to keep the used provider list separately, to save the resources of the providers.