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Userland: Use Core::ArgsParser for 'hostname'

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This commit is contained in:
Linus Groh 2020-08-05 21:24:48 +02:00 committed by Andreas Kling
parent 718a45ef71
commit 31a4a2cc2a
Notes: sideshowbarker 2024-07-19 04:11:28 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/31a4a2cc2a4
Pull-request: https://github.com/SerenityOS/serenity/pull/3019
1 changed files with 21 additions and 18 deletions
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39
Userland/hostname.cpp
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@ -24,6 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/ArgsParser.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
@ -31,24 +32,26 @@
int main(int argc, char** argv)
{
if (argc == 1) {
char buffer[HOST_NAME_MAX];
int rc = gethostname(buffer, sizeof(buffer));
if (rc < 0) {
printf("gethostname() error: %s\n", strerror(errno));
return 1;
}
printf("%s\n", buffer);
}
else if (argc == 2) {
if (strlen(argv[1]) >= HOST_NAME_MAX) {
printf("hostname must be less than %i characters\n", HOST_NAME_MAX);
return 1;
}
else {
sethostname(argv[1], strlen(argv[1]));
}
}
const char* hostname = nullptr;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(hostname, "Hostname to set", "hostname", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
if (!hostname) {
char buffer[HOST_NAME_MAX];
int rc = gethostname(buffer, sizeof(buffer));
if (rc < 0) {
perror("gethostname");
return 1;
}
printf("%s\n", buffer);
} else {
if (strlen(hostname) >= HOST_NAME_MAX) {
fprintf(stderr, "Hostname must be less than %i characters\n", HOST_NAME_MAX);
return 1;
}
sethostname(hostname, strlen(hostname));
}
return 0;
}