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/* ISC license. */
#include <unistd.h>
#include <errno.h>
#include <skalibs/sgetopt.h>
#include <skalibs/uint.h>
#include <skalibs/fmtscan.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-nice [ -I | -i ] [ -n value ] prog..."
int main (int argc, char const *const *argv, char const *const *envp)
{
int incr = 10 ;
int strict = 0 ;
PROG = "s6-nice" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "Iin:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'I' : strict = 0 ; break ;
case 'i' : strict = 1 ; break ;
case 'n': if (!int_scan(l.arg, &incr)) strerr_dieusage(100, USAGE) ; break ;
default : strerr_dieusage(100, USAGE) ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) strerr_dieusage(100, USAGE) ;
errno = 0 ;
if ((nice(incr) < 0) && errno)
{
char fmt[1+UINT_FMT] ;
fmt[int_fmt(fmt, incr)] = 0 ;
if (strict) strerr_diefu2sys(111, "nice to ", fmt) ;
else strerr_warnwu2sys("nice to ", fmt) ;
}
pathexec_run(argv[0], argv, envp) ;
strerr_dieexec((errno == ENOENT) ? 127 : 126, argv[0]) ;
}
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