github.com/afumu/libc@v0.0.6/musl/src/env/getenv.c (about)

     1  #include <stdlib.h>
     2  #include <string.h>
     3  #include <unistd.h>
     4  
     5  char *getenv(const char *name)
     6  {
     7  	size_t l = __strchrnul(name, '=') - name;
     8  	if (l && !name[l] && __environ)
     9  		for (char **e = __environ; *e; e++)
    10  			if (!strncmp(name, *e, l) && l[*e] == '=')
    11  				return *e + l+1;
    12  	return 0;
    13  }