54 lines
826 B
C
54 lines
826 B
C
/*
|
|
setgroups.c
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <grp.h>
|
|
|
|
int setgroups(int ngroups, const gid_t *gidset)
|
|
{
|
|
if(ngroups > 1) {
|
|
/* Supplementary groups not implemented */
|
|
errno= EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if(ngroups == 1)
|
|
return setgid(gidset[0]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int initgroups(const char *name, gid_t basegid)
|
|
{
|
|
struct group *gr;
|
|
int r, found = 0;
|
|
if((r = setgid(basegid)) < 0)
|
|
return r;
|
|
|
|
setgrent();
|
|
while (!found && (gr = getgrent()) != NULL) {
|
|
char **mem;
|
|
for(mem = gr->gr_mem; mem && *mem; mem++) {
|
|
if(!strcmp(name, *mem)) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endgrent();
|
|
|
|
/* Because supplemental groups aren't implemented, this call
|
|
* should fail if the user is in any supplemental groups.
|
|
*/
|
|
if(found) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|