Simple shell added. Simple fprintf function added too.

3 files changed, 70 insertions, 10 deletions

diff --git a/src/user/lib/std/stdio.c b/src/user/lib/std/stdio.c
index c11dd05..2bce2e3 100644
--- a/src/user/lib/std/stdio.c
+++ b/src/user/lib/std/stdio.c
@@ -1,9 +1,14 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <tce/syscall.h>
 
-void printk_int(int number) {
+void fprint(FILE f, char *s) {
+	write(f, 0, strlen(s), s);
+}
+
+void fprint_int(FILE f, int number) {
 	if (number == 0) {
-		printk("0");
+		fprint(f, "0");
 		return;
 	}
 	int negative = 0;
@@ -31,10 +36,10 @@ void printk_int(int number) {
 		number /= 10;
 	}
 	r[order] = 0;
-	printk(s);
+	fprint(f, s);
 }
 
-void printk_hex(unsigned v) {
+void fprint_hex(FILE f, unsigned v) {
 	char s[11] = {'0', 'x', 0};
 
 	int i;
@@ -46,5 +51,63 @@ void printk_hex(unsigned v) {
 		v = v << 4;
 	}
 	s[11] = 0;
-	printk(s);
+	fprint(f, s);
+}
+
+void fprintf(FILE f, char* format, ...) {
+	va_list ap;
+	va_start(ap, format);
+
+	char* start = format;
+
+	while (*format) {
+		if (*format == '%') {
+			if (start != format) write(f, 0, format - start, start);
+			format++;
+			if (*format == 'd' || *format == 'i') {
+				fprint_int(f, va_arg(ap, int));
+			} else if (*format == 'p') {
+				fprint_hex(f, va_arg(ap, uint32_t));
+			} else if (*format == 's') {
+				fprint(f, va_arg(ap, char*));
+			}
+			format++;
+			start = format;
+		} else {
+			format++;
+		}
+	}
+	if (start != format) write(f, 0, format - start, start);
+
+	va_end(ap);
+}
+
+char* freadln(FILE f) {
+	int i;
+
+	char *p = (char*)malloc(256);
+	char *b = p;
+
+	while (1) {
+		int l = read(f, 0, 255, b);
+		if (l < 0) {
+			free(b);
+			return 0;
+		}
+
+		for (i = 0; i < l; i++) {
+			if (b[i] == '\n') {
+				b[i+1] = 0;
+				return p;
+			}
+		}
+
+		int d = b - p + l;
+
+		char* newp = (char*)malloc(d + 256);
+		memcpy(newp, p, d);
+		free(p);
+		p = newp;
+		b = p + d;
+	}
 }
diff --git a/src/user/lib/std/stdlib.c b/src/user/lib/std/stdlib.c
index 21753e9..9d46b5c 100644
--- a/src/user/lib/std/stdlib.c
+++ b/src/user/lib/std/stdlib.c
@@ -4,8 +4,5 @@
 volatile int errno;
 
 void abort() {
-	printk("Abort - errno ");
-	printk_int(errno);
-	printk(".\n");
-	process_exit(-1);
+	process_exit(100 + errno);
 }
diff --git a/src/user/lib/std/string.c b/src/user/lib/std/string.c
index 20fd9e8..7cd8ede 100644
--- a/src/user/lib/std/string.c
+++ b/src/user/lib/std/string.c
@@ -3,7 +3,7 @@
 int strlen(const char *str) {
 	int i = 0;
 	while (str[i++]);
-	return i;
+	return i-1;
 }
 
 char *strchr(const char *str, char c) {