linux c怎么获取进程信息 当前目录

// 获取当前进程名（进程目录在函数内已获取到）

bool GetLocalProgramName(char* processname)

{

    char processdir[1024] = {0}

    char* path_end 

    size_t len = 1024

    

    bool ret = false

    

    do

    {

        if(readlink("/proc/self/exe", processdir,len) <=0) 

        {

            fprintf(stderr, "[ERROR]can not get process name\n")

            break 

        }

        

        path_end = strrchr(processdir,  '/')   // 进程目录

        if(path_end == NULL) 

        {

            fprintf(stderr, "[ERROR]can not parse process name\n")

            break 

        }

        ++path_end 

        *path_end = '\0'

        strcpy(processname, path_end) 

        

        ret = true

    }while(0)

    

    return ret

}

这是我以前的代码，稍微改造一下就行。

opendir/readdir/closedir: 读取目录资讯

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#include

DIR * opendir(const char * pathname)

int closedir(DIR *dir)

struct dirent * readdir(DIR *dir)

int rewinddir(DIR *dir)

struct dirent {

long d_ino /* inode number */

off_t d_off /* offset to this dirent */

unsigned short d_reclen/* length of this d_name */

char d_name [NAME_MAX+1] /* file name (null-terminated) */

}

opendir开启一个目录 *** 作DIR，closedir关闭之。

readdir则循序读取目录中的资讯。

以下是个标准例。

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#include <sys/types.h>

#include <direct.h>

char ** dirGetInfo(const char *pathname)

{

char ** filenames

DIR * dir

struct dirent * ent

int n = 0

filenames = (char **)malloc(sizeof(char*))

filenames[0]=NULL

dir = opendir(pathname)

if (!dir) return filenames

while ((ent = readdir(dir))) {

filenames = (char**)realloc(filenames,sizeof(char*)*(n+1))

filenames[n] = strdup(ent->d_name)

n++

}

closedir(dir)

filenames = (char **)realloc(filenames,sizeof(char*)*(n+1))

filenames[n] = NULL

return filenames

}

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