linux 获取exe的路径

使用示例：

int bufsize = 1024;
char buffer[bufsize];
readlink("/proc/self/exe", buf, bufsize);

To summarize:

On Unixes with

/proc

really
straight and realiable way is to:

readlink("/proc/self/exe",
 buf, bufsize)

(Linux)

readlink("/proc/curproc/file",
 buf, bufsize)

(FreeBSD)

readlink("/proc/self/path/a.out",
 buf, bufsize)

(Solaris)

On Unixes without

/proc

(i.e.
if above fails):

If argv[0] starts with "/" (absolute path) this is the path.

Otherwise if argv[0] contains "/" (relative path) append it to cwd (assuming it hasn't been changed yet).

Otherwise search directories in

$PATH

for
executable

argv[0]

.

Afterwards it may be reasonable to check whether the executable isn't actually a symlink. If it is resolve it relative to the symlink directory.

This step is not necessary in /proc method (at least for Linux). There the proc symlink points directly to executable.

Note that it is up to the calling process to set

argv[0]

correctly.
It is right most of the times however there are occasions when the calling process cannot be trusted (ex. setuid executable).

On Windows: use

GetModuleFileName(NULL,
 buf, bufsize)