first commit

1 files changed, 45 insertions, 0 deletions

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;
+}