login add

TODO

@@ -46,7 +46,7 @@ Loginutils:
  getty
 
 Modutils (linux only):
- modprobe
+ insmod
  rmmod
  lsmod
 
@@ -54,9 +54,6 @@ Findutils:
  grep
  find
 
-Shell:
- rc - run command (1 2 3 ~ | <> <<>> & * " parsing) (sig handler)
-
 BUGS:
 	ls (unicode strlen, -l flag col)
 	xargs (getopt with glibc)

build.sh

@@ -26,7 +26,7 @@ for project in $projects; do
 			cd $PROJECT_DIR/$i
 			echo "   * Compile" $i
 			chmod -v +x build.sh
-			env CC=$CC CFLAGS="$CFLAGS -I$PROJECT_DIR -I$PROJECT_DIR/include/libmu -lm" OUTPUT="$PROJECT_DIR"/bin/ ./build.sh
+			env CC=$CC CFLAGS="$CFLAGS -I$PROJECT_DIR -I$PROJECT_DIR/include/libmu" OUTPUT="$PROJECT_DIR"/bin/ ./build.sh
 			cd $PROJECT_DIR
 		done
 		echo

include/libmu/get_string.h

@@ -0,0 +1,21 @@
+#ifndef _GET_STRING_H
+#define _GET_STRING_H
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+int mu_get_string(const char *prog_name, char *buf, const size_t len) {
+	off_t rbytes = read(STDIN_FILENO, buf, len);
+
+	if (rbytes <= 0) {
+		fprintf(stderr, "%s: %s\n", prog_name, strerror(errno));
+		return 1;
+	}
+
+	if (rbytes > 1)
+		buf[rbytes - 1] = '\0';
+
+	return 0;
+}
+
+#endif

include/libmu/pw_check.h

@@ -0,0 +1,30 @@
+#ifndef _PW_CHECK_H
+#define _PW_CHECK_H
+
+#include <pwd.h>
+#include <stdio.h>
+#include <crypt.h>
+#include <unistd.h>
+
+int pw_check(const char *prog_name, const struct passwd *pw, const char *pass) {
+	if (pw->pw_passwd[0] == '\0' || pass[0] == '\0') {
+		fprintf(stderr, "%s: Incorrect password\n", prog_name);
+		return 1;
+	}
+
+	if (pw->pw_passwd[0] == '!' || pw->pw_passwd[0] == '*') {
+		fprintf(stderr, "%s: Denied\n", prog_name);
+		return 1;
+	}
+
+	char *cryptpass = crypt(pass, pw->pw_passwd);
+	if (cryptpass == NULL)
+		return 1;
+
+	if (!strcmp(pw->pw_passwd, cryptpass))
+		return 0;
+
+	return 1;
+}
+
+#endif

src/coreutils/cp/cp.c

@@ -179,14 +179,14 @@ int main(int argc, char **argv) {
 		}
 	}
 
-	if (argv[optind] == NULL) {
+	argv += optind;
+	argc -= optind;
+
+	if (argc < 2) {
 		fprintf(stderr, "cp: missing operand\n");
 		return 1;
 	}
 
-	argv += optind;
-	argc -= optind;
-
 	int ret = 0;
 	if (argc == 2)
 		ret = cptree(argv[0], argv[argc - 1]);

src/loginutils/login/build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+project_dir=$(pwd)
+echo ./*.c $CFLAGS -o $OUTPUT$(basename $project_dir) -lcrypt | xargs $CC

src/loginutils/login/login.c

@@ -0,0 +1,94 @@
+#include <pwd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <unistd.h>
+#include <signal.h>
+#include "get_string.h"
+#include "pw_check.h"
+
+void login(const struct passwd *pw) {
+	char *shell = pw->pw_shell[0] == '\0' ? "/bin/sh" : pw->pw_shell;
+
+	setenv("HOME", pw->pw_dir, 1);
+	setenv("SHELL", shell, 1);
+	setenv("USER", pw->pw_name, 1);
+	setenv("LOGNAME", pw->pw_name, 1);
+
+	if (chdir(pw->pw_dir) < 0) {
+		fprintf(stderr, "login: %s\n", strerror(errno));
+		return;
+	}
+
+	execlp(shell, shell, "-l", NULL);
+}
+
+struct passwd *proccess_input(char *hostname) {
+	static char user[512];
+	static char psswd[512];
+
+	/* Username */
+	printf("Login on %s:\n", hostname);
+	if (mu_get_string("login", user, sizeof(user)))
+		return NULL;
+
+	struct passwd *pw = getpwnam(user);
+	if (!pw) {
+		fprintf(stderr, "login: Incorrent username\n");
+		return NULL;
+	}
+
+
+	/* Password */
+	printf("\nPassword:\n");
+	if (mu_get_string("login", psswd, sizeof(psswd)))
+		return NULL;
+
+	if (pw_check("login", pw, psswd)) {
+		memset(psswd, '\0', sizeof(psswd));
+		return NULL;
+	}
+
+
+	memset(psswd, '\0', sizeof(psswd));
+	return pw;
+}
+
+int main(void) {
+	if ((!isatty(STDIN_FILENO) || !isatty(STDOUT_FILENO))) {
+		fprintf(stderr, "login: no tty\n");
+		return 1;
+	}
+
+	/* For prompt */
+	char hostname[HOST_NAME_MAX + 1];
+	if (gethostname(hostname, sizeof(hostname)) < 0) {
+		fprintf(stderr, "login: %s\n", strerror(errno));
+		return 1;
+	}
+
+	signal(SIGQUIT, SIG_IGN);
+	signal(SIGINT, SIG_IGN);
+	signal(SIGHUP, SIG_IGN);
+
+
+	struct passwd *pw = proccess_input(hostname);
+	if (!pw)
+		return 1;
+
+	/* Start */
+	if (setgid(pw->pw_gid) < 0) {
+		fprintf(stderr, "login: %s\n", strerror(errno));
+		return 1;
+	}
+
+	if (setuid(pw->pw_uid) < 0) {
+		fprintf(stderr, "login: %s\n", strerror(errno));
+		return 1;
+	}
+
+	login(pw);
+	return 0;
+}

src/miscutils/spark/build.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 project_dir=$(pwd)
-echo ./*.c $CFLAGS -o $OUTPUT$(basename $project_dir) | xargs $CC
+echo ./*.c $CFLAGS -o $OUTPUT$(basename $project_dir) -lm | xargs $CC