freya/lazysphere
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

refactor and xargs

Browse source
This commit is contained in:
Murphy 2023-05-01 18:43:32 -04:00
parent 5a0ec4ed37
commit 82e55dde69
19 changed files with 649 additions and 432 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
Makefile
View file

@ -1,15 +1,24 @@
CC = gcc
INCFLAGS = -Isrc
SOURCE = src
CCFLAGS = -std=c99 -Wall -Wextra -pedantic -O2 -D_DEFAULT_SOURCE
MAJOR = 0
MINOR = 0
PATCH = 1
INCFLAGS = $(shell echo $(SOURCE) | xargs printf -- '-I%s')
CCFLAGS = -std=c99 -Wall -Wextra -pedantic -O2
CCFLAGS += -D_DEFAULT_SOURCE -DMAJOR=$(MAJOR) -DMINOR=$(MINOR) -DPATCH=$(PATCH) -DCHECK_LINK
CCFLAGS += $(INCFLAGS)
LDFLAGS = -s
LDFLAGS += $(INCFLAGS)
BIN = bin
APP = $(BIN)/app
SRC = $(shell find src -name "*.c")
SRC = $(shell find $(SOURCE) -name "*.c")
DIR = $(shell find $(SOURCE) -type d)
OBJ = $(SRC:%.c=$(BIN)/%.o)
.PHONY: dirs run clean build install uninstall
@ -17,10 +26,7 @@ OBJ = $(SRC:%.c=$(BIN)/%.o)
EOF: clean build
dirs:
mkdir -p ./$(BIN)
mkdir -p ./$(BIN)/src
mkdir -p ./$(BIN)/src/util
mkdir -p ./$(BIN)/src/commands
echo $(DIR) | xargs printf -- '$(BIN)/%s\n' | xargs mkdir -p
run: build
$(APP)

2
readme.md
View file

@ -4,7 +4,7 @@
A terrible busybox/gnu coreutils clone.
Currently the only supported commands are:
`dd`, `cat`, `yes`, `echo`, `printf`, `id`, `groups`, `ls`, `tail`, `head`, `ed`, `tee`, `true`, `false`, `tee`, `whoami`, `wc`
`dd`, `cat`, `yes`, `echo`, `printf`, `id`, `groups`, `ls`, `tail`, `head`, `ed`, `tee`, `true`, `false`, `tee`, `whoami`, `wc`, `xargs`
## How to

1
src/command.h
View file

@ -30,3 +30,4 @@ COMMAND(ed);
COMMAND(tee);
COMMAND(whoami);
COMMAND(wc);
COMMAND(xargs);

56
src/commands/cat.c
View file

@ -2,13 +2,13 @@
#include <ctype.h>
struct Flags {
static struct {
bool number_lines;
bool number_non_empty;
bool change_non_print;
bool change_tabs;
bool end_lines_dollar;
};
} flags;
static bool printable(char c) {
switch (c) {
@ -20,7 +20,7 @@ static bool printable(char c) {
}
}
static void help() {
static void help(void) {
printf("Usage: cat [-nbvteA] [FILE]...\n\n");
printf("Print FILEs to stdout\n\n");
printf("\t-n Number output lines\n");
@ -29,10 +29,9 @@ static void help() {
printf("\t-t ...and tabs as ^I\n");
printf("\t-e ...and end lines with $\n");
printf("\t-A Same as -vte\n");
exit(EXIT_SUCCESS);
}
static void cat_file(FILE* file, struct Flags flags) {
static void cat_file(FILE* file) {
char c;
size_t read;
@ -78,35 +77,8 @@ static void cat_file(FILE* file, struct Flags flags) {
}
}
COMMAND(cat) {
struct Flags flags;
flags.number_lines = false;
flags.number_non_empty = false;
flags.change_non_print = false;
flags.change_tabs = false;
flags.end_lines_dollar = false;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) {
continue;
}
if (streql("-", argv[i])) {
break;
}
if (streql("--help", argv[i])) {
help();
}
start++;
size_t len = strlen(argv[i]);
for (size_t j = 1; j < len; j++) {
char c = argv[i][j];
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case 'n':
flags.number_lines = true;
@ -133,19 +105,29 @@ COMMAND(cat) {
default:
error("error: unkown flag -%c", c);
}
return ARG_UNUSED;
}
}
COMMAND(cat) {
flags.number_lines = false;
flags.number_non_empty = false;
flags.change_non_print = false;
flags.change_tabs = false;
flags.end_lines_dollar = false;
int start = parse_args(argc, argv, help, short_arg, NULL);
int arg_len = argc - start;
if (arg_len < 1) {
cat_file(stdin, flags);
cat_file(stdin);
return EXIT_SUCCESS;
}
for (int i = start; i < argc; i++) {
FILE* in = get_file(argv[i], "r");
cat_file(in, flags);
cat_file(in);
if (in != stdin)
fclose(in);
}

7
src/commands/dd.c
View file

@ -1,13 +1,12 @@
#include "../command.h"
static void help() {
static void help(void) {
printf("Usage: dd [if=FILE] [of=FILE] [bs=N] [count=N]\n\n");
printf("Copy a file with converting and formatting\n\n");
printf("\tif=FILE\t\tRead from FILE instead of stdin\n");
printf("\tof=FILE\t\tWrite to FILE instead of stdout\n");
printf("\tbs=N\t\tRead and write N bytes at a time\n");
printf("\tcount=N\t\tCopy only N input blocks\n");
exit(EXIT_SUCCESS);
}
COMMAND(dd) {
@ -17,6 +16,8 @@ COMMAND(dd) {
int bs = 1024;
int count = -1;
parse_help(argc, argv, help);
for (int i = 0; i < argc; i++) {
if (prefix("if=", argv[i])) {
char* path = argv[i] + 3;
@ -36,8 +37,6 @@ COMMAND(dd) {
if (count < 1) {
error("error: count must be greather than 0");
}
} else if (streql("--help", argv[i])) {
help();
} else {
error("error: unkown option %s", argv[i]);
}

60
src/commands/echo.c
View file

@ -1,5 +1,10 @@
#include "../command.h"
static struct {
bool escape_codes;
bool newline;
} flags;
static void print_with_escape_codes(const char* str) {
size_t index = 0;
@ -44,44 +49,39 @@ static void print_with_escape_codes(const char* str) {
}
}
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case 'e':
flags.escape_codes = true;
break;
case 'E':
flags.escape_codes = false;
break;
case 'n':
flags.newline = false;
break;
default:
flags.newline = true;
flags.escape_codes = false;
return ARG_IGNORE;
};
return ARG_UNUSED;
}
COMMAND(echo) {
if (argc < 1) {
return EXIT_SUCCESS;
}
bool escape_codes = false;
bool newline = true;
flags.escape_codes = false;
flags.newline = true;
int start = 0;
if (prefix("-", argv[0])) {
start = 1;
for (size_t i = 0; i < strlen(argv[0] + 1); i++) {
char c = argv[0][i + 1];
switch (c) {
case 'e':
escape_codes = true;
break;
case 'E':
escape_codes = false;
break;
case 'n':
newline = false;
break;
default:
escape_codes = false;
newline = true;
start = 0;
break;
}
}
}
int start = parse_args(argc, argv, NULL, short_arg, NULL);
for (int i = start; i < argc; i++) {
if (escape_codes) {
if (flags.escape_codes) {
print_with_escape_codes(argv[i]);
} else {
printf("%s", argv[i]);
@ -92,7 +92,7 @@ COMMAND(echo) {
}
}
if (newline) {
if (flags.newline) {
putchar('\n');
}

30
src/commands/ed.c
View file

@ -141,21 +141,6 @@ static bool parse_regex_lines(char** end, struct LineAddress* address) {
}
}
// for (; (dir == BEFORE ? i >= until : i < until); dir == BEFORE ? i-- : i++) {
// int len;
// if (re_matchp(regex, lines[i], &len) == -1) {
// if (dir == BEFORE && i == 0) break;
// continue;
// }
// if (cap == siz) {
// cap *= 2;
// buf = realloc(buf, cap * sizeof(unsigned long));
// }
// buf[siz] = i;
// siz++;
// if (dir == BEFORE && i == 0) break;
// }
free_address(*address);
address->empty = false;
address->type = SET;
@ -295,7 +280,7 @@ static void free_data(bool all) {
}
}
static void load_empty() {
static void load_empty(void) {
free_data(false);
line_capacity = 8;
@ -579,7 +564,7 @@ static int substute_string(long int index, long int matches, re_t regex, char* s
return matches_found;
}
static void prompt() {
static void prompt(void) {
printf(": ");
fflush(stdout);
@ -805,13 +790,13 @@ test:
}
static void prompt_loop() {
static void prompt_loop(void) {
while (true) {
prompt();
}
}
static void help() {
static void help(void) {
printf("Usage: ed [FILE]\n\n");
printf("Edit a given [FILE] or create a new text file\n\n");
printf("\t(.,.)\tnewline\t\tgo to address line and print\n");
@ -832,15 +817,16 @@ static void help() {
printf("\t(.,.)\tw file\t\twrite contents of lines to file\n");
printf("\t(.,.)\twq file\t\twrite contents of lines to file then quit\n");
printf("\t(.,.)\tW file\t\tappend contents of line to file\n");
exit(EXIT_SUCCESS);
printf("\t\t=\t\tprint current line number\n");
}
COMMAND(ed) {
parse_help(argc, argv, help);
if (argc < 1) {
load_empty();
prompt_loop();
} else if (streql(argv[0], "--help")) {
help();
} else {
FILE* file = get_file(argv[0], "r");
load_file(file);

84
src/commands/head.c
View file

@ -1,17 +1,17 @@
#include "../command.h"
struct Flags {
static struct {
int count;
bool lines;
bool print_headers;
bool dont_print_headers;
};
} flags;
static void head_file_lines(FILE* file, struct Flags* flags) {
static void head_file_lines(FILE* file) {
size_t len = 0;
char* line = NULL;
int count = flags->count;
int count = flags.count;
while(count > 0 && getline(&line, &len, file) != -1) {
printf("%s", line);
count--;
@ -21,9 +21,9 @@ static void head_file_lines(FILE* file, struct Flags* flags) {
fclose(file);
}
static void head_file_chars(FILE* file, struct Flags* flags) {
static void head_file_chars(FILE* file) {
char c;
int count = flags->count;
int count = flags.count;
while(count > 0 && (c = getc(file)) != EOF) {
putchar(c);
count--;
@ -32,7 +32,7 @@ static void head_file_chars(FILE* file, struct Flags* flags) {
fclose(file);
}
static void help() {
static void help(void) {
printf("Usage: head [OPTIONS] [FILE]...\n\n");
printf("Print first 10 lines of FILEs (or stdin)\n");
printf("With more than one FILE, precede each with a filename header.\n\n");
@ -41,19 +41,11 @@ static void help() {
printf("\t\t\t(b:*512 k:*1024 m:*1024^2)\n");
printf("\t-q\t\tNever print headers\n");
printf("\t-v\t\tAlways print headers\n");
exit(EXIT_SUCCESS);
}
static char* next_arg(int argc, char** argv, int index) {
if (index >= argc) {
error("error: expected another argument after option");
}
return argv[index];
}
static void print_header(char* path, struct Flags* flags, bool many) {
if (flags->dont_print_headers) return;
if (!many && !flags->print_headers) return;
static void print_header(char* path, bool many) {
if (flags.dont_print_headers) return;
if (!many && !flags.print_headers) return;
if (streql("-", path)) {
printf("\n==> standard input <==\n");
} else {
@ -61,53 +53,37 @@ static void print_header(char* path, struct Flags* flags, bool many) {
}
}
static void head_file(char* path, struct Flags* flags, bool many) {
static void head_file(char* path, bool many) {
FILE* file = get_file(path, "r");
print_header(path, flags, many);
if (flags->lines) {
head_file_lines(file, flags);
print_header(path, many);
if (flags.lines) {
head_file_lines(file);
} else {
head_file_chars(file, flags);
head_file_chars(file);
}
}
COMMAND(head) {
struct Flags flags;
flags.count = 10;
flags.lines = true;
flags.print_headers = false;
flags.dont_print_headers = false;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) break;
if (streql(argv[0], "--help")) help();
start++;
int i_s = i;
for (size_t j = 1; j < strlen(argv[i_s]); j++) {
char c = argv[i_s][j];
static int short_arg(char c, char* next) {
switch(c) {
case 'c': {
start++;
flags.lines = false;
char* arg = next_arg(argc, argv, ++i);
long int bkm = get_blkm(arg);
check_arg(next);
long int bkm = get_blkm(next);
if (bkm < 1) {
error("error: bkm cannot be less than 1");
}
flags.count = bkm;
break;
return ARG_USED;
}
case 'n': {
start++;
flags.lines = true;
char* arg = next_arg(argc, argv, ++i);
long int bkm = get_blkm(arg);
check_arg(next);
long int bkm = get_blkm(next);
if (bkm < 1) {
error("error: bkm cannot be less than 1");
}
flags.count = bkm;
break;
return ARG_USED;
}
case 'q':
flags.dont_print_headers = true;
@ -119,23 +95,31 @@ COMMAND(head) {
error("error: unknown option -%c", c);
}
}
return ARG_UNUSED;
}
}
COMMAND(head) {
flags.count = 10;
flags.lines = true;
flags.print_headers = false;
flags.dont_print_headers = false;
int start = parse_args(argc, argv, help, short_arg, NULL);
int count = argc - start;
if (count < 1) {
head_file_lines(stdin, &flags);
head_file_lines(stdin);
return EXIT_SUCCESS;
}
if (count == 1) {
head_file(argv[start], &flags, false);
head_file(argv[start], false);
return EXIT_SUCCESS;
}
for (int i = 0; i < count; i++) {
head_file(argv[start + i], &flags, true);
head_file(argv[start + i], true);
}
return EXIT_SUCCESS;

135
src/commands/ls.c
View file

@ -15,14 +15,14 @@
#define EXEC_COLOR ANSCII BOLD NEXT NORMAL GREEN COLOR
#define BLK_COLOR ANSCII BOLD NEXT NORMAL YELLOW COLOR
struct Flags {
static struct {
bool hidden;
bool hide_dot;
bool more_info;
bool one_column;
bool recurse;
enum When colored;
};
} flags;
struct FileInfo {
struct passwd* usr;
@ -206,14 +206,14 @@ static char* get_file_color(struct FileInfo* info) {
return color;
}
static void list_files(struct FileInfo* files, int file_len, struct FileListInfo info, struct Flags* flags, const char* dir_path) {
static void list_files(struct FileInfo* files, int file_len, struct FileListInfo info, const char* dir_path) {
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
if (!isatty(1)) {
flags->one_column = true;
if (flags->colored == AUTO)
flags->colored = NO;
flags.one_column = true;
if (flags.colored == AUTO)
flags.colored = NO;
}
char* color;
@ -223,7 +223,7 @@ static void list_files(struct FileInfo* files, int file_len, struct FileListInfo
for (int i = 0; i < file_len; i++) {
struct FileInfo finfo = files[i];
color = get_file_color(&finfo);
if (flags->more_info) {
if (flags.more_info) {
printf("%s %*d %*s %*s %*s %s %s%s%s",
finfo.mode,
info.max_link,
@ -235,9 +235,9 @@ static void list_files(struct FileInfo* files, int file_len, struct FileListInfo
info.max_size,
finfo.size,
finfo.date,
flags->colored != NO ? color : "",
flags.colored != NO ? color : "",
finfo.name,
flags->colored != NO ? "\x1b[0m" : ""
flags.colored != NO ? "\x1b[0m" : ""
);
if (finfo.type == DT_LNK) {
char path[PATH_MAX];
@ -254,21 +254,21 @@ static void list_files(struct FileInfo* files, int file_len, struct FileListInfo
} else {
putchar('\n');
}
} else if (flags->one_column) {
printf("%s%s%s\n", flags->colored != NO ? color : "", finfo.name, flags->colored != NO ? "\x1b[0m" : "");
} else if (flags.one_column) {
printf("%s%s%s\n", flags.colored != NO ? color : "", finfo.name, flags.colored != NO ? "\x1b[0m" : "");
} else {
if (info.total_len > w.ws_col) {
if (i != 0 && i % row_count == 0) putchar('\n');
printf("%s%*s%s", flags->colored != NO ? color : "", -column_width,
finfo.name, flags->colored != NO ? "\x1b[0m" : "");
printf("%s%*s%s", flags.colored != NO ? color : "", -column_width,
finfo.name, flags.colored != NO ? "\x1b[0m" : "");
} else {
printf("%s%s%s ", flags->colored != NO ? color : "", finfo.name,
flags->colored != NO ? "\x1b[0m" : "");
printf("%s%s%s ", flags.colored != NO ? color : "", finfo.name,
flags.colored != NO ? "\x1b[0m" : "");
}
}
}
if (!flags->more_info) printf("\n");
if (!flags.more_info) printf("\n");
}
static bool is_dot_dir(const char* path) {
@ -321,7 +321,7 @@ static void push_file(
(*size)++;
}
static bool recurse_directory(char* path, struct Flags* flags) {
static bool recurse_directory(char* path) {
DIR* d;
struct dirent* file;
bool first = true;
@ -338,10 +338,10 @@ static bool recurse_directory(char* path, struct Flags* flags) {
while((file = readdir(d)) != NULL) {
if (file->d_type == DT_DIR) continue;
if (!flags->hidden && prefix(".", file->d_name)) continue;
if (!flags.hidden && prefix(".", file->d_name)) continue;
if (is_dot_dir(file->d_name)) continue;
if (first) {
if (flags->colored == NO)
if (flags.colored == NO)
printf("\n%s:\n", path);
else
printf("\n%s%s:%s\n", DIR_COLOR, path, FILE_COLOR);
@ -350,10 +350,10 @@ static bool recurse_directory(char* path, struct Flags* flags) {
push_file(&files, &info, &size, &capacity, file->d_name, path);
}
list_files(files, size, info, flags, path);
list_files(files, size, info, path);
free(files);
if (!flags->more_info) printf("\n");
if (!flags.more_info) printf("\n");
closedir(d);
@ -362,11 +362,11 @@ static bool recurse_directory(char* path, struct Flags* flags) {
while((file = readdir(d)) != NULL) {
if (file->d_type != DT_DIR) continue;
if (!flags->hidden && prefix(".", file->d_name)) continue;
if (!flags.hidden && prefix(".", file->d_name)) continue;
if (is_dot_dir(file->d_name)) continue;
char buf[PATH_MAX];
append_path(buf, path, file->d_name);
recurse_directory(buf, flags);
recurse_directory(buf);
}
closedir(d);
@ -374,9 +374,9 @@ static bool recurse_directory(char* path, struct Flags* flags) {
return true;
}
static bool list_directory(char* path, struct Flags* flags) {
if (flags->recurse) {
return recurse_directory(path, flags);
static bool list_directory(char* path) {
if (flags.recurse) {
return recurse_directory(path);
}
DIR* d = get_directory(path);
@ -390,12 +390,12 @@ static bool list_directory(char* path, struct Flags* flags) {
struct dirent* file;
while ((file = readdir(d)) != NULL) {
if (!flags->hidden && prefix(".", file->d_name)) continue;
if (flags->hide_dot && is_dot_dir(file->d_name)) continue;
if (!flags.hidden && prefix(".", file->d_name)) continue;
if (flags.hide_dot && is_dot_dir(file->d_name)) continue;
push_file(&files, &info, &size, &capacity, file->d_name, path);
}
if (size > 0) list_files(files, size, info, flags, path);
if (size > 0) list_files(files, size, info, path);
free(files);
closedir(d);
@ -408,7 +408,7 @@ static bool is_dir(const char* path) {
return S_ISDIR(s.st_mode);
}
static void list_file_args(int start, int argc, char** argv, struct Flags* flags) {
static void list_file_args(int start, int argc, char** argv) {
int capacity = 8;
int size = 0;
struct FileInfo* files = malloc(sizeof(struct FileInfo) * capacity);
@ -420,12 +420,12 @@ static void list_file_args(int start, int argc, char** argv, struct Flags* flags
push_file((struct FileInfo**) &files, &info, &size, &capacity, argv[i], ".");
}
if (size > 0) list_files(files, size, info, flags, ".");
if (size > 0) list_files(files, size, info, ".");
free(files);
}
static void help() {
static void help(void) {
printf("Usage: ls [FILE]...\n\n");
printf("List directory contents\n\n");
printf("\t-1\tOne column output\n");
@ -433,39 +433,10 @@ static void help() {
printf("\t-a\tInclude names starting with .\n");
printf("\t-A\tLike -a but without . and ..\n");
printf("\t-R\tRecurse\n");
exit(EXIT_SUCCESS);
}
COMMAND(ls) {
struct Flags flags;
flags.hidden = false;
flags.more_info = false;
flags.hide_dot = false;
flags.one_column = false;
flags.recurse = false;
flags.colored = AUTO;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) break;
if (streql("--help", argv[i])) help();
start++;
if (prefix("--color=", argv[i])) {
char* arg = argv[i] + 8;
if (streql("yes", arg) || streql("always", arg)) {
flags.colored = YES;
} else if (streql("auto", arg)) {
flags.colored = AUTO;
} else if (streql("no", arg) || streql("never", arg)) {
flags.colored = NO;
} else {
error("error: invalid color options: %s", arg);
}
continue;
}
for (size_t j = 1; j < strlen(argv[i]); j++) {
char c = argv[i][j];
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case 'R':
flags.recurse = true;
@ -486,15 +457,45 @@ COMMAND(ls) {
default:
error("error: unkown option -%c", c);
}
}
return ARG_UNUSED;
}
static int long_arg(char* cur, char* next) {
UNUSED(next);
if (prefix("--color=", cur)) {
char* arg = cur + 8;
if (streql("yes", arg) || streql("always", arg)) {
flags.colored = YES;
} else if (streql("auto", arg)) {
flags.colored = AUTO;
} else if (streql("no", arg) || streql("never", arg)) {
flags.colored = NO;
} else {
error("error: invalid color options: %s", arg);
}
} else {
return ARG_IGNORE;
}
return ARG_UNUSED;
}
COMMAND(ls) {
flags.hidden = false;
flags.more_info = false;
flags.hide_dot = false;
flags.one_column = false;
flags.recurse = false;
flags.colored = AUTO;
int start = parse_args(argc, argv, help, short_arg, long_arg);
if (argc - start == 0) {
list_directory(".", &flags);
list_directory(".");
return EXIT_SUCCESS;
}
list_file_args(start, argc, argv, &flags);
list_file_args(start, argc, argv);
bool titled = argc - start > 1;
for (int i = start; i < argc; i++) {
@ -505,7 +506,7 @@ COMMAND(ls) {
else
printf("\n%s:\n", argv[i]);
}
if (list_directory(argv[i], &flags) && i + 1 != argc)
if (list_directory(argv[i]) && i + 1 != argc)
if (titled && !flags.recurse) printf("\n");
}

5
src/commands/printf.c
View file

@ -78,10 +78,9 @@ static void handle_slash(char n) {
}
}
static void help() {
static void help(void) {
printf("Usage printf FORMAT [ARG]...\n\n");
printf("Format and print ARG(s) according to FORMAT (a-la C prinf)\n");
exit(EXIT_SUCCESS);
}
COMMAND(print) {
@ -89,7 +88,7 @@ COMMAND(print) {
error("usage: printf FORMAT [ARG]...\n");
}
if (streql("--help", argv[0])) help();
parse_help(argc, argv, help);
size_t index = 0;
int arg_index = 0;

90
src/commands/tail.c
View file

@ -1,13 +1,13 @@
#include "../command.h"
struct Flags {
static struct {
bool lines;
int count;
bool print_headers;
bool dont_print_headers;
bool print_as_grow;
int grow_wait;
};
} flags;
static size_t tail_file_lines(FILE* file, unsigned int count, size_t skip) {
char* ring[count];
@ -83,7 +83,7 @@ static size_t tail_file_chars(FILE* file, unsigned int count, size_t skip) {
return read;
}
static void help() {
static void help(void) {
printf("Usage: tail [OPTIONS] [FILE]...\n\n");
printf("Print last 10 lines of FILEs (or stdin) to.\n");
printf("With more than one FILE, precede each with a filename header.\n\n");
@ -97,16 +97,9 @@ static void help() {
exit(EXIT_SUCCESS);
}
static char* next_arg(int argc, char** argv, int index) {
if (index >= argc) {
error("error: expected another argument after option");
}
return argv[index];
}
static void print_header(char* path, struct Flags* flags, bool many) {
if (flags->dont_print_headers) return;
if (!many && !flags->print_headers) return;
static void print_header(char* path, bool many) {
if (flags.dont_print_headers) return;
if (!many && !flags.print_headers) return;
if (streql("-", path)) {
printf("\n==> standard input <==\n");
} else {
@ -114,63 +107,44 @@ static void print_header(char* path, struct Flags* flags, bool many) {
}
}
static void tail_file(char* path, struct Flags* flags, bool many) {
static void tail_file(char* path, bool many) {
FILE* file = get_file(path, "r");
print_header(path, flags, many);
print_header(path, many);
size_t skip = 0;
while (true) {
if (flags->lines) {
skip = tail_file_lines(file, flags->count, skip);
if (flags.lines) {
skip = tail_file_lines(file, flags.count, skip);
} else {
skip = tail_file_chars(file, flags->count, skip);
skip = tail_file_chars(file, flags.count, skip);
}
if (!flags->print_as_grow) break;
sleep(flags->grow_wait);
if (!flags.print_as_grow) break;
sleep(flags.grow_wait);
get_file(path, "r");
};
}
COMMAND(tail) {
struct Flags flags;
flags.count = 10;
flags.dont_print_headers = false;
flags.print_headers = false;
flags.lines = true;
flags.print_as_grow = false;
flags.grow_wait = 10;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) break;
if (streql(argv[0], "--help")) help();
start++;
int i_s = i;
for (size_t j = 1; j < strlen(argv[i_s]); j++) {
char c = argv[i_s][j];
static int short_arg(char c, char* next) {
switch (c) {
case 'c': {
start++;
flags.lines = false;
char* arg = next_arg(argc, argv, ++i);
long int bkm = get_blkm(arg);
check_arg(next);
long int bkm = get_blkm(next);
if (bkm < 1) {
error("error: bkm cannot be less than 1");
}
flags.count = bkm;
break;
return ARG_USED;
}
case 'n': {
start++;
flags.lines = true;
char* arg = next_arg(argc, argv, ++i);
long int bkm = get_blkm(arg);
check_arg(next);
long int bkm = get_blkm(next);
if (bkm < 1) {
error("error: bkm cannot be less than 1");
}
flags.count = bkm;
break;
return ARG_USED;
}
case 'q':
flags.dont_print_headers = true;
@ -182,21 +156,31 @@ COMMAND(tail) {
flags.print_as_grow = true;
break;
case 's': {
start++;
char* arg = next_arg(argc, argv, ++i);
long int sec = get_number(arg);
check_arg(next);
long int sec = get_number(next);
if (sec < 1) {
error("error: wait seconds cannot be less than 1");
}
flags.grow_wait = sec;
break;
return ARG_USED;
}
default: {
error("error: unknown option -%c", c);
}
}
return ARG_UNUSED;
}
}
COMMAND(tail) {
flags.count = 10;
flags.dont_print_headers = false;
flags.print_headers = false;
flags.lines = true;
flags.print_as_grow = false;
flags.grow_wait = 10;
int start = parse_args(argc, argv, help, short_arg, NULL);
int count = argc - start;
@ -206,12 +190,12 @@ COMMAND(tail) {
}
if (count == 1) {
tail_file(argv[start], &flags, false);
tail_file(argv[start], false);
return EXIT_SUCCESS;
}
for (int i = 0; i < count; i++) {
tail_file(argv[start + i], &flags, true);
tail_file(argv[start + i], true);
}
return EXIT_SUCCESS;

45
src/commands/tee.c
View file

@ -2,7 +2,12 @@
#include <signal.h>
static void help() {
static struct {
bool append;
bool handle_sigint;
} flags;
static void help(void) {
printf("Usage: tee [-ai] [FILE]...\n\n");
printf("Copy stdin to each FILE, and also to stdout\n\n");
printf("\t-a Append to the given FILEs, don't overwrite\n");
@ -10,7 +15,7 @@ static void help() {
exit(EXIT_SUCCESS);
}
static void handle(){}
static void handle(int dummy){UNUSED(dummy);}
static void run_tee(int file_count, FILE* files[file_count]) {
char c;
@ -26,33 +31,29 @@ static void run_tee(int file_count, FILE* files[file_count]) {
}
}
COMMAND(tee) {
bool append = false;
bool handle_sigint = false;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) break;
if (streql("--help", argv[i])) help();
start++;
for (size_t j = 1; j < strlen(argv[i]); j++) {
char o = argv[i][j];
switch (o) {
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case 'a':
append = true;
flags.append = true;
break;
case 'i':
handle_sigint = true;
flags.handle_sigint = true;
break;
default:
error("error: unkown option: %c", o);
}
error("error: unkown option: %c", c);
}
return ARG_UNUSED;
}
if (handle_sigint) {
COMMAND(tee) {
flags.append = false;
flags.handle_sigint = false;
int start = parse_args(argc, argv, help, short_arg, NULL);
if (flags.handle_sigint) {
signal(SIGINT, handle);
}
@ -63,7 +64,7 @@ COMMAND(tee) {
FILE* files[argc - start];
for (int i = start; i < argc; i++) {
FILE* file = get_file(argv[i], append ? "a" : "w");
FILE* file = get_file(argv[i], flags.append ? "a" : "w");
files[i - start] = file;
}

66
src/commands/wc.c
View file

@ -2,13 +2,14 @@
#include <ctype.h>
struct Flags {
static struct {
bool newlines;
bool words;
bool characters;
bool bytes;
bool longest_line;
};
bool has_flags;
} flags;
static int lines = 0;
static int words = 0;
@ -16,20 +17,20 @@ static int chars = 0;
static int bytes = 0;
static int logst = 0;
static void list(int l, int w, int c, int b, int lg, struct Flags* flags) {
if (flags->newlines) {
static void list(int l, int w, int c, int b, int lg) {
if (flags.newlines) {
printf("\t%d", l);
}
if (flags->words) {
if (flags.words) {
printf("\t%d", w);
}
if (flags->characters) {
if (flags.characters) {
printf("\t%d", c);
}
if (flags->bytes) {
if (flags.bytes) {
printf("\t%d", b);
}
if (flags->longest_line) {
if (flags.longest_line) {
printf("\t%d", lg);
}
}
@ -40,7 +41,7 @@ static bool is_delimiter(char c) {
return c == ' ' || c == '\t' || c == '\n';
}
static void run_wc(FILE* file, struct Flags* flags) {
static void run_wc(FILE* file) {
int l = 0, w = 0, c = 0, b = 0, lg = 0;
bool in_word = false;
@ -70,7 +71,7 @@ static void run_wc(FILE* file, struct Flags* flags) {
}
if (in_word) w++;
lg = lg > current_length ? lg : current_length;
list(l, w, c, b, lg, flags);
list(l, w, c, b, lg);
lines += l;
words += w;
chars += c;
@ -80,7 +81,7 @@ static void run_wc(FILE* file, struct Flags* flags) {
fclose(file);
}
static void help() {
static void help(void) {
printf("Usage: wc [-cmlwL] [FILE]...\n\n");
printf("Count lines, words, and bytes for FILEs (or stdin)\n\n");
printf("\t-c Count bytes\n");
@ -91,24 +92,8 @@ static void help() {
exit(EXIT_SUCCESS);
}
COMMAND(wc) {
struct Flags flags;
flags.newlines = false;
flags.words = false;
flags.characters = false;
flags.bytes = false;
flags.longest_line = false;
bool has_flags = false;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i])) break;
if (streql("--help", argv[i])) help();
start++;
for (size_t j = 1; j < strlen(argv[i]); j++) {
char c = argv[i][j];
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case 'c':
flags.bytes = true;
@ -128,30 +113,41 @@ COMMAND(wc) {
default:
error("error: invald option -%c", c);
}
has_flags = true;
}
flags.has_flags = true;
return ARG_UNUSED;
}
if (!has_flags) {
COMMAND(wc) {
flags.newlines = false;
flags.words = false;
flags.characters = false;
flags.bytes = false;
flags.longest_line = false;
flags.has_flags = false;
int start = parse_args(argc, argv, help, short_arg, NULL);
if (!flags.has_flags) {
flags.newlines = true;
flags.words = true;
flags.characters = true;
}
if (argc - start < 1) {
run_wc(stdin, &flags);
run_wc(stdin);
printf("\n");
return EXIT_SUCCESS;
}
for (int i = start; i < argc; i++) {
FILE* file = get_file(argv[i], "r");
run_wc(file, &flags);
run_wc(file);
printf("\t%s\n", argv[i]);
}
if (argc - start > 1) {
list(lines, words, chars, bytes, logst, &flags);
list(lines, words, chars, bytes, logst);
printf("\ttotal\n");
}

4
src/commands/whoami.c
View file

@ -2,14 +2,14 @@
#include <pwd.h>
static void help() {
static void help(void) {
printf("Usage: whoami\n\n");
printf("Print the username associated with the current effective user id\n");
exit(EXIT_SUCCESS);
}
COMMAND(whoami) {
if (argc > 0 && streql("--help", argv[0])) help();
parse_help(argc, argv, help);
uid_t usr = getuid();
struct passwd* passwd = getpwuid(usr);

163
src/commands/xargs.c Normal file
View file

@ -0,0 +1,163 @@
#include "../command.h"
#include <stdio.h>
#include <stdlib.h>
static struct {
bool null_seperated;
bool ignore_empty;
bool print_command;
bool prompt_command;
int max_args;
FILE* file;
} flags;
static void help(void) {
printf("Usage: xargs [OPTIONS] [PROG ARGS]\n\n");
printf("Run PROG on every item given by stdin\n\n");
printf("\t-0\tInput is separated by NULs\n");
printf("\t-a FILE\tRead from FILE instead of stdin\n");
printf("\t-r\tDon't run command if input is empty\n");
printf("\t-t\tPrint the command on stderr before execution\n");
printf("\t-p\tAsk user whether to run each command\n");
printf("\t-n N\tPass no more than N args to PROG\n");
}
static int short_arg(char c, char* next) {
UNUSED(next);
switch (c) {
case '0':
flags.null_seperated = true;
break;
case 'a':
check_arg(next);
flags.file = get_file(next, "r");
return ARG_USED;
case 'r':
flags.ignore_empty = true;
break;
case 't':
flags.print_command = true;
break;
case 'p':
flags.prompt_command = true;
break;
case 'n':
check_arg(next);
long int n = get_number(next);
if (n < 1) {
error("error: max arg count must be at least 1");
}
return ARG_USED;
}
return ARG_UNUSED;
}
char* read_next(FILE* file, int arg_count) {
if (arg_count == flags.max_args) return NULL;
int size = 0;
int capacity = 8;
char* buf = malloc(sizeof(char) * capacity);
char c;
while(c = getc(file), true) {
if (c == EOF && size == 0) {
free(buf);
return NULL;
}
if (size == capacity) {
capacity *= 2;
buf = realloc(buf, sizeof(char) * capacity);
}
if (c == '\0' || c == EOF || (!flags.null_seperated && c == '\n')) {
buf[size++] = '\0';
return buf;
} else {
buf[size++] = c;
}
}
}
void read_args(FILE* file, char*** args, int* size, int* capacity) {
char* arg;
while (arg = read_next(file, *size), true) {
if (*size == *capacity) {
*capacity *= 2;
*args = realloc(*args, sizeof(char*) * *capacity);
}
(*args)[(*size)++] = arg;
if (arg == NULL) break;
}
}
COMMAND(xargs) {
flags.null_seperated = false;
flags.ignore_empty = false;
flags.print_command = false;
flags.print_command = false;
flags.max_args = -1;
flags.file = stdin;
int start = parse_args(argc, argv, help, short_arg, NULL);
char* command;
if (start >= argc) {
command = "echo";
} else {
command = argv[start];
}
int arg_start = start + 1;
int arg_on_stack_count;
if (arg_start >= argc) {
arg_on_stack_count = 0;
arg_start = argc - 1;
} else {
arg_on_stack_count = argc - arg_start;
}
int size = arg_on_stack_count + 1;
int capacity = size + 8;
char** args = malloc(sizeof(char*) * capacity);
args[0] = command;
memcpy(&args[1], &argv[arg_start], arg_on_stack_count * sizeof(char*));
read_args(flags.file, &args, &size, &capacity);
if (flags.ignore_empty && size < 2) goto cleanup;
if (flags.prompt_command || flags.print_command) {
for (int i = 0; i < size - 1; i++) {
fprintf(stderr, "%s ", args[i]);
}
fprintf(stderr, "\b\n");
}
if (flags.prompt_command) {
fprintf(stderr, "Run command? ");
fflush(stderr);
FILE* in = get_tty_stream("r");
char c = getc(in);
fclose(in);
if (c != 'y' && c != 'Y') {
fprintf(stderr, "Skipping...\n");
goto cleanup;
}
}
if (execvp(command, args) == -1) {
error("error: failed to execute command: %s", strerror(errno));
}
cleanup:
for (int i = arg_on_stack_count + 1; i < size - 1; i++) {
free(args[i]);
}
fclose(flags.file);
return EXIT_SUCCESS;
}

9
src/commands/yes.c
View file

@ -1,19 +1,18 @@
#include "../command.h"
static void help() {
static void help(void) {
printf("Usage: yes [STRING]\n\n");
printf("Repeatedly output a line with all specified STRING(s), or 'y'.\n");
exit(EXIT_SUCCESS);
}
COMMAND(yes) {
parse_help(argc, argv, help);
const char* repeat;
if (argc == 0) {
repeat = "y";
} else {
if (streql("--help", argv[0])) {
help();
}
repeat = argv[0];
for (int i = 1; i < argc; i++) {
*(argv[i]-1) = ' ';

6
src/main.c
View file

@ -13,6 +13,7 @@ int main (ARGUMENTS) {
error("error: argument 0 missing");
}
#ifdef CHECK_LINK
struct stat buf;
lstat(argv[0], &buf);
@ -20,12 +21,13 @@ int main (ARGUMENTS) {
if (argc < 2) {
printf("usage: lazysphere [function [arguments]...]\n\n");
printf("currently defined functions:\n");
printf("\tdd, cat, yes, echo, printf, id, groups, ls, tail, head, ed, tee, true, false, tee, whoami, wc\n");
printf("\tdd, cat, yes, echo, printf, id, groups, ls, tail, head, ed, tee, true, false, tee, whoami, wc, xargs\n");
return EXIT_SUCCESS;
}
argc--;
argv = &argv[1];
}
#endif
const char* cmd;
if (strncmp("./", argv[0], 2) == 0) {
@ -66,6 +68,8 @@ int main (ARGUMENTS) {
return whoami(NEXT_ARGS);
} else if (streql(cmd, "wc")) {
return wc(NEXT_ARGS);
} else if (streql(cmd, "xargs")) {
return xargs(NEXT_ARGS);
} else {
error("error: invalid command %s", cmd);
}

99
src/util/shared.c
View file

@ -2,10 +2,12 @@
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/stat.h>
#include <paths.h>
void error(const char* format, ...) {
va_list list;
@ -132,3 +134,100 @@ void print_date_time(time_t mills, char buf[13]) {
snprintf(buf + n, 13 - n, "%d %02d:%02d ", info->tm_mday, info->tm_hour, info->tm_sec);
}
#ifndef MAJOR
#define MAJOR 0
#endif
#ifndef MINOR
#define MINOR 0
#endif
#ifndef PATCH
#define PATCH 0
#endif
void check_arg (char* arg) {
if (arg == NULL) {
error("error: expected another argument after option");
}
}
static void global_help(void (*help)(void)) {
printf("LazySphere v%d.%d.%d multi-call binary.\n\n", MAJOR, MINOR, PATCH);
help();
exit(EXIT_SUCCESS);
}
void parse_help(int argc, char** argv, void (*help)(void)) {
if (argc < 1) return;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i]) || streql("-", argv[i])) break;
if (help != NULL && streql("--help", argv[i])) global_help(help);
}
}
int parse_args(int argc, char** argv, void (*help)(void), int (*short_arg)(char, char*), int (*long_arg)(char*, char*)) {
if (argc < 1) return 0;
int start = 0;
for (int i = 0; i < argc; i++) {
if (!prefix("-", argv[i]) || streql("-", argv[i])) break;
if (help != NULL && streql("--help", argv[i])) global_help(help);
char* next_arg;
if (i + 1 == argc) {
next_arg = NULL;
} else {
next_arg = argv[i+1];
}
int current = i;
if (prefix("--", argv[i])) {
if (long_arg == NULL) {
goto exit;
}
int r = long_arg(argv[current], next_arg);
if (r == ARG_USED) {
i++;
start++;
} else if (r == ARG_IGNORE) {
goto exit;
}
} else {
if (short_arg == NULL) {
goto exit;
}
for (size_t j = 1; j < strlen(argv[current]); j++) {
int r = short_arg(argv[current][j], next_arg);
if (r == ARG_USED) {
i++;
start++;
} else if (r == ARG_IGNORE) {
goto exit;
}
}
}
start++;
}
exit:
return start;
}
int get_tty() {
int fd = open(_PATH_TTY, O_RDONLY);
if (fd < 0) error("error: failed to get tty: %s", strerror(errno));
return fd;
}
FILE* get_tty_stream(char* type) {
int fd = get_tty();
FILE* file = fdopen(fd, type);
if (file == NULL) {
error("error: failed to open tty stream: %s", strerror(errno));
}
return file;
}

13
src/util/shared.h
View file

@ -3,6 +3,7 @@
#include <stdio.h>
#include <stdbool.h>
#include <time.h>
#include <fcntl.h>
#define ANSCII "\x1b["
#define NEXT ";"
@ -44,3 +45,15 @@ bool prefix(const char* pre, const char* str);
void print_file_size(size_t bytes, char buf[5]);
void print_date_time(time_t mills, char buf[13]);
#define UNUSED(x) (void)(x)
#define ARG_UNUSED 0
#define ARG_USED 1
#define ARG_IGNORE 2
void check_arg (char* arg);
void parse_help (int argc, char** argv, void (*help)(void));
int parse_args (int argc, char** argv, void (*help)(void), int (*short_arg)(char, char*), int (*long_arg)(char*, char*));
int get_tty();
FILE* get_tty_stream(char* type);