diff options
| -rw-r--r-- | src/cmd/Makefile | 3 | ||||
| -rw-r--r-- | src/cmd/cat/Makefile | 18 | ||||
| -rw-r--r-- | src/cmd/cat/cat.c | 64 |
3 files changed, 85 insertions, 0 deletions
diff --git a/src/cmd/Makefile b/src/cmd/Makefile index 1263be8..0cde3ff 100644 --- a/src/cmd/Makefile +++ b/src/cmd/Makefile @@ -20,6 +20,8 @@ all: LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) cd echo/; make LDSCRIPT=$(LDSCRIPT) CC=$(CC) AS=$(AS) LD=$(LD) SYSROOT=$(SYSROOT) \ LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) + cd cat/; make LDSCRIPT=$(LDSCRIPT) CC=$(CC) AS=$(AS) LD=$(LD) SYSROOT=$(SYSROOT) \ + LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) .PHONY: clean clean: @@ -30,3 +32,4 @@ clean: cd lsdisk/; make clean cd login/; make clean cd echo/; make clean + cd cat/; make clean diff --git a/src/cmd/cat/Makefile b/src/cmd/cat/Makefile new file mode 100644 index 0000000..3827429 --- /dev/null +++ b/src/cmd/cat/Makefile @@ -0,0 +1,18 @@ +include ../../data/build/user.mk + +CFILES = $(shell find . -name "*.c") +CFILES = $(shell find . -name "*.c") +CFLAGS = -L$(LIBC_DIR) -lc $(INTERNAL_CFLAGS) \ + -L../../lib/libwidget -lwidget -L../../lib/libc/ -lc \ + -I../../lib/libwidget/include/ +OBJECTS = $(CFILES:%.c=%.o) + +$(SYSROOT)/usr/bin/cat: $(OBJECTS) + $(LD) $(OBJECTS) -o $@ $(CFLAGS) + +%.o: %.c + $(CC) $(INTERNAL_CFLAGS) -c $(CFLAGS) $< -o $@ + +.PHONY: clean +clean: + rm -f *.o *.d diff --git a/src/cmd/cat/cat.c b/src/cmd/cat/cat.c new file mode 100644 index 0000000..d9a22fd --- /dev/null +++ b/src/cmd/cat/cat.c @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdio.h> +#include <unistd.h> +#include <stddef.h> +#include <fcntl.h> + +static void +cat(const char *path) +{ + char buf[128]; + size_t len; + int fd; + + fd = open(path, O_RDONLY); + if (fd < 0) { + printf("error: could not open \"%s\"\n", path); + return; + } + + /* Read chunk by chunk */ + while ((len = read(fd, buf, sizeof(buf))) > 0) { + printf("%s", buf); + } + + close(fd); +} + +int +main(void) +{ + for (int i = 1; i < __argc; ++i) { + cat(__argv[i]); + } + + return 0; +} |