implement

1 files changed, 84 insertions, 1 deletions

diff --git a/src/pwd/getpwnam.c b/src/pwd/getpwnam.c
index 5a255caf..f5b1b979 100644
--- a/src/pwd/getpwnam.c
+++ b/src/pwd/getpwnam.c
@@ -1,10 +1,93 @@
 #include "sys/types.h"
 #include <pwd.h>
 #include "stddef.h"
+#include "stdio.h"
+#include "limits.h"
+#include "string.h"
+#include "_config.h"
+
+#ifndef LINE_MAX
+#define LINE_MAX _POSIX2_LINE_MAX
+#endif
 
 struct passwd * getpwnam(const char * name)
 {
-	(void)name;
+	static char buf[LINE_MAX + 1];
+	static struct passwd pwd = { 0 };
+	char *user, *password, *uid, *gid, *gecos, *home, *shell, *nl;
+
+	/* TODO: attempt calling first _PWD_CMD */
+
+	FILE *db = fopen(_PWD_DB, "r");
+	if (db == NULL) {
+		return NULL;
+	}
+
+	while (fgets(buf, sizeof(buf), db) != NULL) {
+		user = buf;
+		if ((password = strchr(buf, ':')) != NULL) {
+			*password = '\0';
+			password++;
+		} else {
+			continue;
+		}
+
+		if (strcmp(user, name) != 0) {
+			continue;
+		}
+
+		if ((uid = strchr(password, ':')) != NULL) {
+			*uid = '\0';
+			uid++;
+		} else {
+			continue;
+		}
+
+		if ((gid = strchr(uid, ':')) != NULL) {
+			*gid = '\0';
+			gid++;
+		} else {
+			continue;
+		}
+
+		if ((gecos = strchr(gid, ':')) != NULL) {
+			*gecos = '\0';
+			gecos++;
+		} else {
+			continue;
+		}
+
+		if ((home = strchr(gecos, ':')) != NULL) {
+			*home = '\0';
+			home++;
+		} else {
+			continue;
+		}
+
+		if ((shell = strchr(home, ':')) != NULL) {
+			*shell = '\0';
+			shell++;
+			if ((nl = strchr(shell, '\n')) != NULL) {
+				*nl = '\0';
+			}
+		} else {
+			continue;
+		}
+
+		pwd.pw_name = user;
+		pwd.pw_uid = strtoul(gid, NULL, 10);
+		pwd.pw_gid = strtoul(gid, NULL, 10);
+		pwd.pw_dir = home;
+		pwd.pw_shell = shell;
+		break;
+	}
+
+	fclose(db);
+
+	if (strcmp(name, pwd.pw_name) == 0) {
+		return &pwd;
+	}
+
 	return NULL;
 }