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/* ISC license. */
#include <unistd.h>
#include <skalibs/bytestr.h>
#include <skalibs/uint.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-setuidgid username prog..."
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv, char const *const *envp)
{
unsigned int pos ;
PROG = "s6-setuidgid" ;
if (argc < 3) dieusage() ;
pos = str_chr(argv[1], ':') ;
if (argv[1][pos])
{
unsigned int uid = 0, gid = 0, len = uint_scan(argv[1], &uid) ;
if (len != pos) dieusage() ;
if (argv[1][pos+1] && !uint0_scan(argv[1]+pos+1, &gid)) dieusage() ;
if (gid && setgid(gid)) strerr_diefu1sys(111, "setgid") ;
if (uid && setuid(uid)) strerr_diefu1sys(111, "setuid") ;
}
else if (!prot_setuidgid(argv[1]))
strerr_diefu2sys(111, "change identity to ", argv[1]) ;
pathexec_run(argv[2], argv+2, envp) ;
strerr_dieexec(111, argv[2]) ;
}
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