a.c

linux 下的 得到可执行文件路径

#include <stdio.h>
#include <stdlib.h>
#include <link.h>
#include <unistd.h>
#define MAX_PATH 1024

int GetBinName(char* fn){
	int count = readlink("/proc/self/exe", fn, MAX_PATH); 
	if ((count<0)||(count>=MAX_PATH)){
		return 1;
	}
	return 0;
}

int fexist(char* fn){
	FILE* ret = fopen(fn, "r");
	if(ret){
		fclose(ret);
		return 1;
	}
	return 0;
}

int fcname(char* fullpath, char* name){
	int i;
	int ret = 0;
	int len = strlen(fullpath);
	if(len<=0)return 1;
	//printf("strlen == %d\n", len);
	for(i=len-1;i>0;i--){
		//printf("i == %d\n", i);
		if((fullpath[i]=='/')||(fullpath[i]=='\\')){
			//printf("ret when i == %d\n", i);
			fullpath[i+1] = '\0';
			ret = 1;
			break;
		}
	}
	if(ret){
		strcat(fullpath, name);
	}else{
		strcpy(fullpath, name);
	}
}

int main(){
	char exe[MAX_PATH];
	char fn[] = "/bin/a.exe";
	char in[] = "a.ini";
	int r = fexist("/etc/NetUniKey.ini");
	printf("%d\n", r);
	fcname(&fn[0], &in[0]);
	printf("%s\n", fn);
	GetBinName(&exe[0]);
	printf("%s\n", exe);
}