first commit

19 files changed, 353 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ddc169b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+CC = tcc
+CFLAGS = -Wall -g
+#CC = gcc
+#CFLAGS = -Wall -Wextra
+LDFLAGS = 
+SRC = src
+BIN = bin
+
+SRCS=$(wildcard $(SRC)/*.c)
+BINS=$(SRCS:$(SRC)/%.c=%)
+
+all: $(BINS)
+
+%: $(SRC)/%.c
+	$(CC) $(CFLAGS) -o $(BIN)/$@ $<
+
+clean:
+	rm -r $(BIN)/*
diff --git a/bin/cat b/bin/cat
new file mode 100755
index 0000000..95c49db
--- /dev/null
+++ b/bin/cat
diff --git a/bin/catplan9 b/bin/catplan9
new file mode 100755
index 0000000..35d66a3
--- /dev/null
+++ b/bin/catplan9
diff --git a/bin/cp b/bin/cp
new file mode 100755
index 0000000..e5b3bf6
--- /dev/null
+++ b/bin/cp
diff --git a/bin/echo b/bin/echo
new file mode 100755
index 0000000..1344bcf
--- /dev/null
+++ b/bin/echo
diff --git a/bin/head b/bin/head
new file mode 100755
index 0000000..08aef70
--- /dev/null
+++ b/bin/head
diff --git a/bin/tac b/bin/tac
new file mode 100755
index 0000000..dc2dda2
--- /dev/null
+++ b/bin/tac
diff --git a/bin/tail b/bin/tail
new file mode 100755
index 0000000..b5f2a26
--- /dev/null
+++ b/bin/tail
diff --git a/bin/touch b/bin/touch
new file mode 100755
index 0000000..69f0d0b
--- /dev/null
+++ b/bin/touch
diff --git a/do.txt b/do.txt
new file mode 100644
index 0000000..a8ababa
--- /dev/null
+++ b/do.txt
@@ -0,0 +1,28 @@
+cp
+dd
+df
+dir
+ln
+ls
+mkdir
+mv
+rm
+rmdir
+base32
+base64
+wc
+arch
+basename
+date
+du
+false
+pwd
+true
+whoami
+yes
+less
+more
+ascii
+awk
+grep
+cd
diff --git a/src/cat.c b/src/cat.c
new file mode 100644
index 0000000..b89cba6
--- /dev/null
+++ b/src/cat.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define PROGRAM_NAME "cat"
+
+struct stat statbuf;
+
+int main(int argc, char* argv[]) {
+	FILE *fileptr = NULL;
+	char buf[8192];
+	char ch;
+	
+	if (argc < 2) {
+		while (fgets(buf, sizeof(buf), stdin) != NULL) {
+			printf("%s", buf);
+		}
+
+		return 0;
+	}
+	
+	if (access(argv[1], F_OK) != 0) {
+		printf("%s: %s: No such file or directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+		
+	if (stat(argv[1], &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+		printf("%s: %s is a directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+
+	fileptr = fopen(argv[1], "r");
+
+	if (fileptr == NULL){
+		perror("cat");
+		return 1;
+	}
+
+	while ((ch = fgetc(fileptr)) != EOF) {
+		putchar(ch);
+	}
+
+	fclose(fileptr);
+	return 0;
+}
diff --git a/src/cp.c b/src/cp.c
new file mode 100644
index 0000000..573677d
--- /dev/null
+++ b/src/cp.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	FILE *input, *output;
+	char ch;
+
+	if (argv[2] == NULL) {
+		printf("specify a destination\n");
+		return 1;
+	}
+
+	input = fopen(argv[1], "r");
+	output = fopen(argv[2], "a");
+	
+	if (input == NULL || output == NULL) {
+		printf("failed to open the file dingus\n");
+		return 1;
+	} else {
+		while ((ch = fgetc(input)) != EOF) {
+			fputc(ch, output);
+		}
+	}
+
+	fclose(input);
+	fclose(output);
+
+	return 0;
+}
diff --git a/src/echo.c b/src/echo.c
new file mode 100644
index 0000000..ad853f1
--- /dev/null
+++ b/src/echo.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[]) {
+	for (int i=1; i < argc; i++) {
+		printf("%s ", argv[i]);
+	}
+	
+	printf("\n");
+
+	return 0;
+}
diff --git a/src/head.c b/src/head.c
new file mode 100644
index 0000000..d669545
--- /dev/null
+++ b/src/head.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define PROGRAM_NAME "head"
+
+struct stat statbuf;
+
+int main(int argc, char* argv[]) {
+	FILE *fileptr = NULL;
+	char buf[8192];
+	char ch;
+	int lines = 0;
+
+	if (argc < 2) {
+		while (fgets(buf, sizeof(buf), stdin) != NULL) {
+			printf("%s", buf);
+		}
+
+		return 0;
+	}
+	
+	if (access(argv[1], F_OK) != 0) {
+		printf("%s: %s: No such file or directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+		
+	if (stat(argv[1], &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+		printf("%s: %s is a directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}	
+
+	fileptr = fopen(argv[1], "r");
+	
+	if (fileptr == NULL) {
+		perror("head");
+		return 1;
+	}
+	
+	while (((ch = fgetc(fileptr)) != EOF) && (lines < 10)) {
+		if (ch == '\n') {
+			lines++;
+		}	
+		putchar(ch);
+	}
+
+	fclose(fileptr);
+	return 0;
+}
diff --git a/src/tac.c b/src/tac.c
new file mode 100644
index 0000000..3f7caf6
--- /dev/null
+++ b/src/tac.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define PROGRAM_NAME "tac"
+
+struct stat statbuf;
+
+int main(int argc, char* argv[]) {
+	FILE *fileptr = NULL;
+	char buf[8192];
+	char ch;
+	int size = 0;
+
+	if (argc < 2) {
+		while (fgets(buf, sizeof(buf), stdin) != NULL) {
+			printf("%s", buf);
+		}
+
+		return 0;
+	}	
+
+	if (access(argv[1], F_OK) != 0) {
+		printf("%s: %s: No such file or directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+		
+	if (stat(argv[1], &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+		printf("%s: %s is a directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+
+	fileptr = fopen(argv[1], "r");
+	
+	if (fileptr == NULL) {
+		perror("tac");
+		return 1;
+	}
+
+	while ((ch = fgetc(fileptr)) != EOF) {
+		size++;
+	}
+		
+	size = size - 2;
+	rewind(fileptr);
+
+	while (size >= 0) {
+		fseek(fileptr, size, 0);
+		ch = fgetc(fileptr);
+		putchar(ch);
+		size--;
+	}
+
+	printf("\n");
+
+	fclose(fileptr);
+	return 0;
+}
diff --git a/src/tail.c b/src/tail.c
new file mode 100644
index 0000000..e34b90f
--- /dev/null
+++ b/src/tail.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define PROGRAM_NAME "tail"
+
+struct stat statbuf;
+
+int main(int argc, char* argv[]) {
+	FILE *fileptr = NULL;
+	char buf[8192];
+	char ch;
+	int size = 0, lines = 0;
+
+	if (argc < 2) {
+		while (fgets(buf, sizeof(buf), stdin) != NULL) {
+			printf("%s", buf);
+		}
+
+		return 0;
+	}	
+
+	if (access(argv[1], F_OK) != 0) {
+		printf("%s: %s: No such file or directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+		
+	if (stat(argv[1], &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+		printf("%s: %s is a directory.\n", PROGRAM_NAME, argv[1]);
+		return 1;
+	}
+
+	fileptr = fopen(argv[1], "r");
+	
+	if (fileptr == NULL) {
+		printf("ermmmm can't open this\n");
+		return 1;
+	}
+
+	while ((ch = fgetc(fileptr)) != EOF) {
+		size++;
+	}
+
+	size = size - 2;
+	rewind(fileptr);
+
+	while (size >= 0 && lines < 10) {
+		fseek(fileptr, size, 0);
+		ch = fgetc(fileptr);
+		if (ch == '\n') {
+			lines++;
+		}
+		putchar(ch);
+		size--;
+	}
+
+	fclose(fileptr);
+	return 0;
+}
diff --git a/src/touch.c b/src/touch.c
new file mode 100644
index 0000000..6cbde27
--- /dev/null
+++ b/src/touch.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define PROGRAM_NAME "touch"
+
+int main(int argc, char* argv[]) {
+	if (argc < 2) {
+		fprintf(stderr, "%s: missing file operand\n", PROGRAM_NAME);
+		return 1;
+	}
+
+	for (int i = 1; i < argc; i++) {
+		if (utimes(argv[i], NULL) != 0) {
+			int file = open(argv[i], O_CREAT | O_WRONLY, 0644);
+
+			if (file == -1) {
+				perror("touch");
+				continue;
+			}
+
+			close(file);
+		}
+	}
+
+	return 0;
+}
diff --git a/test b/test
new file mode 100644
index 0000000..c0da8f4
--- /dev/null
+++ b/test
@@ -0,0 +1,27 @@
+jajf;daj fa;df 
+aifa
+ fjksa]fk
+as
+fl
+'a lf
+afjsaif fpjas fposa fhpasihfidhidahpfa
+'s
+f
+saf
+sa
+fs
+af
+afsagagda
+fjsafak
+fg
+ad
+g
+ag
+a
+g
+dagdagagda
+g
+gda
+gda
+gadhfsahhhfsh
+ hSF HF H FH  FS H  
diff --git a/todo.txt b/todo.txt
new file mode 100644
index 0000000..a3197d3
--- /dev/null
+++ b/todo.txt
@@ -0,0 +1,2 @@
+tail + head:
+implement variable lines