OrionLibC

diff --git a/pwd/getpw.c b/pwd/getpw.c
new file mode 100644
index 0000000..116cf97
--- /dev/null
+++ b/pwd/getpw.c
@@ -0,0 +1,148 @@
+#include <sys/limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pwd.h>
+
+#include <stdio.h>
+
+/* Parts of a /etc/passwd line */
+enum PasswordParts {
+	PASSWD_USERNAME,
+	PASSWD_PASSWORD,
+	PASSWD_UID,
+	PASSWD_GID,
+	PASSWD_INFO,
+	PASSWD_HOMEDIR,
+	PASSWD_SHELL,
+};
+
+static Passwd entry;
+static char entryUsername[33];
+static char entryPassword[128];
+static char entryInfo[1024];
+static char entryHomeDir[PATH_MAX];
+static char entryShell[PATH_MAX];
+
+/* Get part of a password line */
+static char *
+get_part(char *line, int index, char *buf)
+{
+	int i, len = 0;
+	char *start;
+	for (i = 0; i < index; i++)
+		while (*line++ != ':');
+	start = line;
+	while (*line != ':' && *line != '\n') {
+		line++;
+		len++;
+	}
+	memcpy(buf, start, len);
+	buf[len] = '\0';
+	return buf;
+}
+
+/* Convert a string to a number */
+static int
+number(char *str)
+{
+	int num = 0, col = 1, len;
+	for (len = 0; str[len] >= '0' && str[len] <= '9'; len++);
+	while (len--) {
+		num += (str[len] - '0') * col;
+		col *= 10;
+	}
+	return num;
+}
+
+/* Move to next line */
+static char *
+next_line(char *line)
+{
+	while (*line++ != '\n');
+	return line;
+}
+
+/* Convert line to Passwd */
+static Passwd *
+line_to_passwd(char *line)
+{
+	if (!*line)
+		return NULL;
+
+	char uidstr[8], gidstr[8];
+	get_part(line, PASSWD_USERNAME, entryUsername);
+	get_part(line, PASSWD_PASSWORD, entryPassword);
+	get_part(line, PASSWD_UID, uidstr);
+	get_part(line, PASSWD_GID, gidstr);
+	get_part(line, PASSWD_INFO, entryInfo);
+	get_part(line, PASSWD_HOMEDIR, entryHomeDir);
+	get_part(line, PASSWD_SHELL, entryShell);
+
+	entry.username = entryUsername;
+	entry.password = entryPassword;
+	entry.uid = number(uidstr);
+	entry.gid = number(gidstr);
+	entry.info = entryInfo;
+	entry.homedir = entryHomeDir;
+	entry.shell = entryShell;
+
+	return &entry;
+}
+
+/* Get password file entry by name */
+Passwd *
+getpwname(const char *username)
+{
+
+	int fd = open("/etc/passwd", O_RDONLY);
+	if (fd < 0)
+		return (Passwd *) fd;
+	size_t sz = lseek(fd, 0, SEEK_END);
+	lseek(fd, 0, SEEK_SET);
+	char *buf = malloc(sz);
+	read(fd, buf, sz);
+	close(fd);
+
+	char *line, tmp[33];
+	for (line = buf; *line; line = next_line(line)) {
+		get_part(line, PASSWD_USERNAME, tmp);
+		if (!strcmp(username, tmp))
+			break;
+	}
+
+	Passwd *res = line_to_passwd(line);
+
+	free(buf);
+	return res;
+}
+
+/* Get password file entry by ID */
+Passwd *
+getpwuid(uid_t uid)
+{
+	int fd = open("/etc/passwd", O_RDONLY);
+	if (fd < 0)
+		return (Passwd *) fd;
+	size_t sz = lseek(fd, 0, SEEK_END);
+	lseek(fd, 0, SEEK_SET);
+	char *buf = malloc(sz);
+	read(fd, buf, sz);
+	close(fd);
+
+	char *line, tmp[8];
+	uid_t uidLine;
+	for (line = buf; *line; line = next_line(line)) {
+		get_part(line, PASSWD_UID, tmp);
+		uidLine = number(tmp);
+		if (uid == uidLine)
+			break;
+	}
+
+	Passwd *res = line_to_passwd(line);
+
+	free(buf);
+	return res;
+}