user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/tests/posix/pwd.c

@@ -0,0 +1,128 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <pwd.h>
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+
+int main()
+{
+	struct passwd pwd, *result = NULL;
+	char *buf;
+	size_t bufsize;
+	int s;
+
+	bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+	assert(bufsize > 0 && bufsize < 0x100000);
+
+	buf = malloc(bufsize);
+	assert(buf);
+
+	s = getpwnam_r("root", &pwd, buf, bufsize, &result);
+	assert(!s);
+	assert(pwd.pw_uid == 0);
+	assert(!strcmp(pwd.pw_name, "root"));
+	assert(strlen(pwd.pw_passwd) <= 1000);
+
+	s = getpwuid_r(0, &pwd, buf, bufsize, &result);
+	assert(!s);
+	assert(pwd.pw_uid == 0);
+	assert(!strcmp(pwd.pw_name, "root"));
+	assert(strlen(pwd.pw_passwd) <= 1000);
+
+	result = getpwnam("root");
+	assert(result);
+	assert(result->pw_uid == 0);
+	assert(!strcmp(result->pw_name, "root"));
+	assert(strlen(result->pw_passwd) <= 1000);
+
+	result = getpwuid(0);
+	assert(result);
+	assert(result->pw_uid == 0);
+	assert(!strcmp(result->pw_name, "root"));
+	assert(strlen(result->pw_passwd) <= 1000);
+
+	errno = 0;
+	setpwent();
+	assert(errno == 0);
+
+	errno = 0;
+	result = getpwent();
+	assert(result);
+
+	pwd = *result;
+	pwd.pw_name = strdup(result->pw_name);
+	pwd.pw_passwd = strdup(result->pw_passwd);
+	pwd.pw_gecos = strdup(result->pw_gecos);
+	pwd.pw_dir = strdup(result->pw_dir);
+	pwd.pw_shell = strdup(result->pw_shell);
+	assert(pwd.pw_name);
+	assert(pwd.pw_passwd);
+	assert(pwd.pw_gecos);
+	assert(pwd.pw_dir);
+	assert(pwd.pw_shell);
+
+	errno = 0;
+	setpwent();
+	assert(errno == 0);
+
+	errno = 0;
+	result = getpwent();
+	assert(result);
+
+	assert(!strcmp(pwd.pw_name, result->pw_name));
+	assert(!strcmp(pwd.pw_passwd, result->pw_passwd));
+	assert(!strcmp(pwd.pw_gecos, result->pw_gecos));
+	assert(!strcmp(pwd.pw_dir, result->pw_dir));
+	assert(!strcmp(pwd.pw_shell, result->pw_shell));
+	assert(pwd.pw_uid == result->pw_uid);
+	assert(pwd.pw_gid == result->pw_gid);
+
+	free(pwd.pw_name);
+	free(pwd.pw_passwd);
+	free(pwd.pw_gecos);
+	free(pwd.pw_dir);
+	free(pwd.pw_shell);
+
+	pwd.pw_name = "managarm";
+	pwd.pw_passwd = "passwordhash";
+	pwd.pw_uid = 1234;
+	pwd.pw_gid = 12345;
+	pwd.pw_gecos = "/etc/password test";
+	pwd.pw_dir = "/home/managarm\n";
+	pwd.pw_shell = "/usr/bin/bash";
+
+	// tmpfile() cannot be used because its unimplemented in mlibc.
+	char filename[] = "pwdXXXXXX";
+	int tmpfd = mkstemp(filename);
+	assert(tmpfd);
+	FILE *tmp = fdopen(tmpfd, "w+");
+	assert(tmp);
+
+	assert(putpwent(NULL, tmp) < 0);
+	assert(putpwent(&pwd, tmp) < 0);
+
+	pwd.pw_dir = "/home/managarm:";
+	assert(putpwent(&pwd, tmp) < 0);
+
+	pwd.pw_dir = "/home/:managarm\n";
+	assert(putpwent(&pwd, tmp) < 0);
+
+	pwd.pw_dir = "/home/managarm";
+	assert(putpwent(&pwd, tmp) == 0);
+	rewind(tmp);
+
+	char *expected = "managarm:passwordhash:1234:12345:/etc/password test:/home/managarm:/usr/bin/bash\n";
+	size_t expectedlen = strlen(expected);
+
+	size_t readsize = fread(buf, 1, bufsize, tmp);
+	assert(readsize == expectedlen);
+	assert(strncmp(expected, buf, expectedlen) == 0);
+
+	fclose(tmp);
+	unlink(filename);
+	free(buf);
+
+	return 0;
+}