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my_alias.c
/*********************************************************************************
* 文件名称：my_alias.c
* 功能描述：alias and unalias cmd
* 维护记录：2009-3-25 V1.01 by skyily
*********************************************************************************/
#include "my_alias.h"
#include "main.h"
MY_ALIAS *alias_head;
/*********************************************************************************
* 语法格式： void alias_init(void)
* 实现功能： initialize alias environment
* 入口参数： 无
* 出口参数： 无
*********************************************************************************/
void alias_init()
{
FILE *fp;
char tmp_buf[1024] = {""};
char tmp_by[1024] = {""};
char tmp_ture[1024] = {""};
MY_ALIAS *node = NULL;
MY_ALIAS *bp = NULL;
int i = 0;
int j = 0;
if((fp = fopen("/home/skyily/temp/shellprograme/.aliasrc", "r")) == NULL)
{
perror("open .aliasrc error!");
return ;
}
while(fgets(tmp_buf, 1024, fp) != NULL)
{
if(strncmp(tmp_buf, "alias", 5) == 0)
{
node = (MY_ALIAS *)malloc(sizeof(MY_ALIAS));
i = 6;
j = 0;
while(tmp_buf[i] != '=')
{
tmp_by[j++] = tmp_buf[i++];
}
i += 2;
j = 0;
while(tmp_buf[i] != '\'')
{
tmp_ture[j++] = tmp_buf[i++];
}
// sscanf(tmp_buf, "alias %s='%s'\n", node->by_name, node->ture_name);
strcpy(node->by_name, tmp_by);
strcpy(node->ture_name, tmp_ture);
// printf("%s\n", tmp_by);
// printf("%s\n", tmp_ture);
memset(tmp_by, 0, 1024);
memset(tmp_ture, 0, 1024);
if(alias_head == NULL)
bp = alias_head = node;
else
bp->next = node;
bp = node;
bp->next = NULL;
node = NULL;
}
memset(tmp_buf, 0, 1024);
}
// close(fp);
return ;
}
/*********************************************************************************
* 语法格式： char *alias_check(char *buf, int c_size)
* 实现功能： check alias in the alias environment
* 入口参数： buf is cmd_buf, operate cmd_buf; c_size is size of cmd burch
* 出口参数： alias_head
*********************************************************************************/
char *alias_check(char *buf, int c_size)
{
MY_ALIAS *p = alias_head;
char tmp_buf[CMD_SIZE] = {""};
int i = 0;
//char *tmp_ar[CMD_BUNCH_SIZE];
if(argv[0] != NULL)
{
while(p != NULL)
{
if(strcmp(argv[0], p->by_name) == 0)
{
// printf("%s\n", p->ture_name); //test
// strcpy(argv[0], p->ture_name); //wrong...
argv[0] = NULL;
strcpy(tmp_buf, p->ture_name);
// printf("%s\n", argv[0]); //test
for(i = 1; i < c_size; i++)
{
// printf("%s\n", argv[i]); //test
strcat(tmp_buf, " ");
strcat(tmp_buf, argv[i]);
argv[i] = NULL;
}
// printf("%s\n", tmp_buf); //test
strcpy(buf, tmp_buf); //
return buf;
// break;
}
p = p->next;
}
}
return NULL;
}
/*********************************************************************************
* 语法格式： void alias_display(void)
* 实现功能： display alias environment
* 入口参数： 无
* 出口参数： 无
*********************************************************************************/
void alias_display()
{
MY_ALIAS *p = alias_head;
char tmp_buf[1024] = {""};
while(p != NULL)
{
sprintf(tmp_buf, "alias %s='%s'", p->by_name, p->ture_name);
printf("%s\n", tmp_buf);
memset(tmp_buf, 0, 1024);
p = p->next;
}
return ;
}
/*********************************************************************************
* 语法格式： MY_ALIAS *alias_cmd(int c_size)
* 实现功能： implement alias cmd
* 入口参数： c_size is size of cmd burch
* 出口参数： alias_head
*********************************************************************************/
MY_ALIAS *alias_cmd(int c_size)
{
MY_ALIAS *tmp = alias_head;
MY_ALIAS *p = NULL;
MY_ALIAS *node = NULL;
char tmp_buf[1024] = {""};
char tmp_by[1024] = {""};
char tmp_ture[1024] = {""};
char end[CMD_SIZE] = {""};
int signal = 0;
int i = 0;
int j = 0;
char *ptr;
if(argv[1] != NULL)
{
strcpy(tmp_buf, argv[1]);
if(c_size > 2)
{
for(i = 2; i < c_size; i++)
{
strcat(tmp_buf, " ");
strcat(tmp_buf, argv[i]);
}
}
i = 0;
if((ptr = strchr(tmp_buf, '=')) && (*ptr != tmp_buf[0]))
{
while(tmp_buf[i] != '=')
{
tmp_by[j++] = tmp_buf[i++];
}
i++;
if(tmp_buf[i] != '\0')
{
j = 0;
if(tmp_buf[i] != '\'' ) //|| tmp_buf[i] == '\"')
{
printf("alias %s format is not right\n", tmp_buf);
printf("example is ll=\'ls -l\'\n");
return alias_head;
}
i++;
while(tmp_buf[i] != '\'')
{
if(tmp_buf[i] == '\0')
{
while(1)
{
printf("> ");
fflush(stdout);
fgets(end, CMD_SIZE, stdin);
if((end != NULL) && (strcmp(end, "\'\n") == 0))
{
break;
}
memset(end, 0, CMD_SIZE);
}
break;
}
tmp_ture[j++] = tmp_buf[i++];
}
while(tmp != NULL)
{
p = tmp;
if(strcmp(tmp_by, p->by_name) == 0)
{
signal = 1;
break;
}
tmp = tmp->next;
}
if(signal == 1)
{
memset(p->ture_name, 0, 200);
strcpy(p->ture_name, tmp_ture);
//printf("%s\n", tmp_ture);
}
else
{
node = (MY_ALIAS *)malloc(sizeof(MY_ALIAS));
node->next = alias_head;
alias_head = node;
strcpy(node->by_name, tmp_by);
strcpy(node->ture_name, tmp_ture);
node = NULL;
}
}
else
{
printf("input error\n");
}
}
else
{
printf("alias %s not found\n", tmp_buf);
}
}
return alias_head;
}
/*********************************************************************************
* 语法格式： void unalias_cmd(void)
* 实现功能： delelt alias of environment
* 入口参数： 无
* 出口参数： 无
*********************************************************************************/
void unalias_cmd()
{
MY_ALIAS *p = alias_head;
MY_ALIAS *tmp = NULL;
if(argv[1] != NULL)
{
if(strcmp(argv[1], "-a") == 0)
{
while(alias_head != NULL)
{
alias_head = alias_head->next;
free(p);
// p = NULL;
p = alias_head;
}
}
else
{
//while(p != NULL)
{
while((p != NULL) && (strcmp(argv[1], p->by_name) != 0))
{
tmp = p;
p = p->next;
}
if((p != NULL) && (strcmp(argv[1], p->by_name) == 0))
{
if(p == alias_head)
{
alias_head = p->next;
free(p);
p = NULL;
}
else
{
tmp->next = p->next;
free(p);
p = NULL;
}
}
else
{
printf("unalias %s not found\n", argv[1]);
}
}
}
}
return ;
}
基本已经实现，希望大家多多指点
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