forked from mirror/dwm
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
/**
|
|
* Magically finds the current's executable path
|
|
*
|
|
* I'm doing the do{}while(); trick because Linux (what I'm running) is not
|
|
* POSIX compilant and so lstat() cannot be trusted on /proc entries
|
|
*
|
|
* See Also:
|
|
* man 2 stat #TODO: Figure this out on linux
|
|
*
|
|
* According to POSIX.1-2001, lstat() on a symbolic link need return
|
|
valid information only in the st_size field and the file type of
|
|
the st_mode field of the stat structure. POSIX.1-2008 tightens
|
|
the specification, requiring lstat() to return valid information
|
|
in all fields except the mode bits in st_mode.
|
|
*
|
|
* @return char* the path of the current executable
|
|
*/
|
|
char *get_dwm_path(){
|
|
return "/run/current-system/sw/bin/dwm";
|
|
|
|
// https://en.wikibooks.org/wiki/C_Programming/POSIX_Reference/sys/stat.h#Member_types
|
|
struct stat s;
|
|
int r, length, rate = 42;
|
|
char *path = NULL;
|
|
|
|
if(lstat("/proc/self/exe", &s) == -1){
|
|
perror("lstat:");
|
|
return NULL;
|
|
}
|
|
|
|
length = s.st_size + 1 - rate;
|
|
|
|
do{
|
|
length+=rate;
|
|
|
|
free(path);
|
|
path = malloc(sizeof(char) * length);
|
|
|
|
if(path == NULL){
|
|
perror("malloc:");
|
|
return NULL;
|
|
}
|
|
|
|
r = readlink("/proc/self/exe", path, length);
|
|
|
|
if(r == -1){
|
|
perror("readlink:");
|
|
return NULL;
|
|
}
|
|
}while(r >= length);
|
|
|
|
path[r] = '\0';
|
|
|
|
return path;
|
|
}
|
|
|
|
/**
|
|
* self-restart
|
|
*
|
|
* Initially inspired by: Yu-Jie Lin
|
|
* https://sites.google.com/site/yjlnotes/notes/dwm
|
|
*/
|
|
void self_restart(const Arg *arg) {
|
|
char *const argv[] = {get_dwm_path(), NULL};
|
|
|
|
if(argv[0] == NULL){
|
|
return;
|
|
}
|
|
|
|
execv(argv[0], argv);
|
|
}
|