Add some sources
This commit is contained in:
parent
37c36b25ba
commit
0548b71a72
13
src/common.h
Normal file
13
src/common.h
Normal file
@ -0,0 +1,13 @@
|
||||
#ifndef COMMON_H
|
||||
#define COMMON_H
|
||||
|
||||
|
||||
#define CONCAT(x,y) _CONCAT(x,y)
|
||||
#define _CONCAT(x,y) (x##y)
|
||||
|
||||
|
||||
#define TOSTR(x) _TOSTR(x)
|
||||
#define _TOSTR(x) (#x)
|
||||
|
||||
|
||||
#endif /* COMMON_H */
|
65
src/icmd.c
Normal file
65
src/icmd.c
Normal file
@ -0,0 +1,65 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <limits.h>
|
||||
#include "icmd.h"
|
||||
#include "common.h"
|
||||
|
||||
|
||||
#define ICMDS_SIZE \
|
||||
(sizeof(g_icmds) / sizeof(g_icmds[0]))
|
||||
|
||||
#define ICMD(name) \
|
||||
{ \
|
||||
.cmd = TOSTR(name), \
|
||||
.len = sizeof(TOSTR(name)), \
|
||||
.func = CONCAT(icmd_, name), \
|
||||
}
|
||||
|
||||
|
||||
struct icmd g_icmds[] =
|
||||
{
|
||||
ICMD(exit),
|
||||
ICMD(cd),
|
||||
ICMD(ls),
|
||||
};
|
||||
|
||||
|
||||
int
|
||||
call_icmds(char *line)
|
||||
{
|
||||
size_t i;
|
||||
|
||||
for (i = 0; i < ICMDS_SIZE; i++)
|
||||
{
|
||||
printf("cmp: %s : %s \n", g_icmds[i].cmd, line);
|
||||
if (strncmp(g_icmds[i].cmd, line, g_icmds[i].len) == 0)
|
||||
return g_icmds[i].func(line);
|
||||
}
|
||||
|
||||
return INT_MAX;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
icmd_exit(char *line)
|
||||
{
|
||||
printf("exiting with reason: %s", line);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
icmd_cd(char *line)
|
||||
{
|
||||
printf("I'm a cd! line: %s\n", line);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
icmd_ls(char *line)
|
||||
{
|
||||
printf("I'm a ls! line: %s\n", line);
|
||||
return 1;
|
||||
}
|
23
src/icmd.h
Normal file
23
src/icmd.h
Normal file
@ -0,0 +1,23 @@
|
||||
#ifndef ICMD_H
|
||||
#define ICMD_H
|
||||
|
||||
|
||||
struct icmd
|
||||
{
|
||||
char *cmd;
|
||||
int len;
|
||||
int (*func)(char *);
|
||||
};
|
||||
|
||||
|
||||
/* interface */
|
||||
int call_icmds(char *line);
|
||||
|
||||
|
||||
/* internal commands as functions */
|
||||
int icmd_exit(char *line);
|
||||
int icmd_cd(char *line);
|
||||
int icmd_ls(char *line);
|
||||
|
||||
|
||||
#endif /* ICMD_H */
|
49
src/main.c
Normal file
49
src/main.c
Normal file
@ -0,0 +1,49 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <limits.h>
|
||||
#include "icmd.h"
|
||||
|
||||
|
||||
/* should be enough */
|
||||
#define CMD_LINE_MAX 1024
|
||||
#define CMD_PATH_MAX 4096
|
||||
|
||||
|
||||
int
|
||||
die(char *s)
|
||||
{
|
||||
perror(s);
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
char line[CMD_LINE_MAX];
|
||||
char cwd[CMD_PATH_MAX];
|
||||
char *pline = line;
|
||||
int ret;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
/* todo: does it really fail? */
|
||||
if (getcwd(cwd, sizeof(cwd)) == NULL)
|
||||
die("getcwd()");
|
||||
|
||||
printf("[%s] ", cwd);
|
||||
fgets(line, sizeof(line), stdin);
|
||||
|
||||
ret = call_icmds(line);
|
||||
if (ret == INT_MAX)
|
||||
puts("no such internal command, going on...");
|
||||
else if (ret == 0)
|
||||
puts("internal command succeded!");
|
||||
else
|
||||
puts("internal command succeded!");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
Loading…
Reference in New Issue
Block a user