[sam@hzhsan test]$ more test_processname.cpp #include <limits.h> #include <stdio.h> #include <string.h> #include <unistd.h> size_t get_executable_path( char* processdir,char* processname, size_t len) {         char* path_end;         if(readlink("/proc/self/exe", processdir,len) <=0)                 return -1;         path_end = strrchr(processdir,  '/');         if(path_end == NULL)                 return -1;         ++path_end;         strcpy(processname, path_end);         *path_end = '\0';         return (size_t)(path_end - processdir); } int main() {         char path[PATH_MAX];         char processname[1024];         get_executable_path(path, processname, sizeof(path));         printf("directory:%s\nprocessname:%s\n",path,processname); } [sam@hzhsan test]$