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feat(shell): import readline, and add simple history

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iridiumR 2022-09-20 21:04:55 +08:00
parent 5c8ed315f7
commit 87eb989d79
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GPG key ID: 5574BE4450D55618
3 changed files with 19 additions and 48 deletions
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5
Makefile
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@ -1,6 +1,7 @@
SHELL := /bin/bash SHELL := /bin/bash
CC = gcc CC = gcc
SRC = main.c loop.c exec.c line.c builtin.c SRC = main.c loop.c exec.c line.c builtin.c
LINK= -lreadline
OBJ = $(SRC:.c=.ro) OBJ = $(SRC:.c=.ro)
DBGOBJ = $(SRC:.c=.do) DBGOBJ = $(SRC:.c=.do)
EXE = dish EXE = dish
@ -11,10 +12,10 @@ debug: CFLAGS = -g -O0 -DDEBUG
release: CFLAGS = -Wall -O3 release: CFLAGS = -Wall -O3
release: $(OBJ) release: $(OBJ)
$(CC) $(CFLAGS) -o $(EXE) $(OBJ) $(CC) $(CFLAGS) -o $(EXE) $(OBJ) $(LINK)
debug: $(DBGOBJ) debug: $(DBGOBJ)
$(CC) $(CFLAGS) -o $(DBGEXE) $(DBGOBJ) $(CC) $(CFLAGS) -o $(DBGEXE) $(DBGOBJ) $(LINK)
clean: clean:
rm -f *.o *.do *.ro rm -f *.o *.do *.ro

40
line.c
View file

@ -4,45 +4,13 @@
* @Last Modified by: 1ridic * @Last Modified by: 1ridic
* @Last Modified time: 2022-09-18 14:14:05 * @Last Modified time: 2022-09-18 14:14:05
*/ */
#include "line.h"
#include <stdio.h> #include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h>
char *readLine(void) { #include "line.h"
int bufsize = LINE_BUF_SIZE;
int position = 0;
char *buffer = malloc(sizeof(char) * bufsize);
char c;
if (!buffer) {
fprintf(stderr, "dish: allocation error\n");
exit(EXIT_FAILURE);
}
while (1) {
// read a character
c = getchar();
// repleace EOF with a null character and return
if (c == EOF || c == '\n') {
buffer[position] = '\0';
return buffer;
} else {
buffer[position] = c;
}
position++;
/* if the buffer is full, reallocate */
if (position >= bufsize) {
bufsize += LINE_BUF_SIZE;
buffer = realloc(buffer, bufsize);
if (!buffer) {
fprintf(stderr, "dish: allocation error\n");
exit(EXIT_FAILURE);
}
}
}
}
char **splitLine(char *line) { char **splitLine(char *line) {
int bufsize = LINE_BUF_SIZE, position = 0; int bufsize = LINE_BUF_SIZE, position = 0;

12
loop.c
View file

@ -4,12 +4,14 @@
* @Last Modified by: 1ridic * @Last Modified by: 1ridic
* @Last Modified time: 2022-09-18 23:32:02 * @Last Modified time: 2022-09-18 23:32:02
*/ */
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <stdlib.h>
#include <string.h>
#include "loop.h" #include "loop.h"
#include "exec.h" #include "exec.h"
#include "line.h" #include "line.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int status; int status;
@ -17,8 +19,8 @@ int loop() {
char *line; char *line;
char **args; char **args;
printf(ANSI_COLOR_GREEN"> "ANSI_COLOR_RESET); line = readline(ANSI_COLOR_GREEN"> "ANSI_COLOR_RESET);
line = readLine(); add_history(line);
args = splitLine(line); args = splitLine(line);
status = commandExec(args); status = commandExec(args);
free(line); free(line);