自制c语言编制cgi实现搜索功能

　　1. 环境
/usr/local/apache/htdocs/ (待检索的文件在该目录下)
/usr/local/apache/temp/ (作为中转的文件夹)
/usr/local/apache/cgi-bin/
2. 将gcc search.c产生的a.out放置在/usr/local/apache/cgi-bin/中，权限设置为nobody可
以执行。
3. chown -R nobody.nobody /usr/local/apache/temp
4. 在/etc/cron.daily中增加一个文件deletetemp 权限为555
rm -f /usr/local/apache/temp/*
5. 在/etc/cron.hourly中增加一个文件myupdate 权限为555
updatedb -U /usr/local/apache/htdocs
6. 删除/etc/cron.daily中的一个文件slocate.cron

附录(共2条)：
1. index.htm的源码
<Html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>

<body>
<p>请输入你的查询字符串</p>
<form name="form1" action="http://129.158.217.223/cgi-bin/a.out">
<p> </p>
<p>
<input name="keyname" value="" type=text>
</p>
<p>
<input type="submit" value="查询">
</p>
</form>
<p> </p>
</body>
</html>

2. search.c的源码
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>

int main(int argc, char* argv[])
{
int fd;
int status;
time_t i;
char cFileName[64];
char cTempName[64];
char cBuffer[1024];
char *p = cBuffer;
char cContent[10240];

char *data;
char keyWord[1024];
data = getenv("QUERY_STRING");
if(data==NULL)
{
printf("Content-Type:text/html

");
printf("not found!");
exit(1);
}

sscanf(data, "keyname=%s&", keyword);

p += sprintf(p, "locate '%s' sed -e 's#^/usr/local/apache/htdocs#http://129.158.217.223#' sed -e 's#^.*$#<a href=&>&</a>#' > ", keyword);
i = time(NULL);

sprintf(cTempName, "%d.html", i);
sprintf(cFileName, "/usr/local/apache/temp/%d.html", i);
strcat(cBuffer, cFileName);
cBuffer[1024-1]=0;

system(cBuffer);
fd = open(cFileName, O_RDWR);
status = read(fd, cContent, sizeof(cContent)-1);
close(fd);

printf("Content-Type:text/html

");
printf("<meta http-equiv=refresh content=0;url="http://129.158.217.223/temp/%s">
", cTempName);
printf("Waiting.......................
");

printf("%s", keyword);
return 0;
}