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/* ISC license. */
#include <skalibs/bsdsnowflake.h> /* stat */
#include <skalibs/nonposix.h> /* mkdtemp */
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h> /* rename */
#include <errno.h>
#include <skalibs/stat.h>
#include <skalibs/posixplz.h>
#include <skalibs/gol.h>
#include <skalibs/tai.h>
#include <skalibs/prog.h>
#include <skalibs/strerr.h>
#include <skalibs/direntry.h>
#include <skalibs/djbunix.h>
#include <s6-rc/config.h>
#include <s6-rc/s6rc.h>
#define USAGE "s6-rc-set-new [ -v verbosity ] [ -r repo ] setname..."
#define dieusage() strerr_dieusage(100, USAGE)
static void cleanup (char const *fn)
{
int e = errno ;
rm_rf(fn) ;
errno = e ;
}
static inline void newset (char const *repo, char const *setname)
{
size_t repolen = strlen(repo) ;
size_t setlen = strlen(setname) ;
char everything[repolen + 21] ;
char fn[repolen + 10 + setlen] ;
char tmp[repolen + 18 + setlen] ;
char act[repolen + 25 + setlen] ;
char onb[repolen + 25 + setlen] ;
memcpy(everything, repo, repolen) ;
memcpy(everything + repolen, "/sources/.everything", 21) ;
memcpy(fn, everything, repolen + 9) ;
memcpy(fn + repolen + 9, setname, setlen + 1) ;
if (access(fn, F_OK) == -1)
{
if (errno != ENOENT) strerr_diefu2sys(111, "access ", fn) ;
}
else strerr_dief4x(100, "set ", setname, " already exists in repository ", repo) ;
memcpy(tmp, fn, repolen + 9) ;
tmp[repolen + 9] = '.' ;
memcpy(tmp + repolen + 10, setname, setlen) ;
memcpy(tmp + repolen + 10 + setlen, ":XXXXXX", 8) ;
if (!mkdtemp(tmp)) strerr_diefu2sys(111, "mkdtemp ", tmp) ;
memcpy(act, tmp, repolen + 17 + setlen) ;
memcpy(act + repolen + 17 + setlen, "/lock", 6) ;
if (!openwritenclose_unsafe(act, "", 0))
{
cleanup(tmp) ;
strerr_diefu2sys(111, "create ", act) ;
}
memcpy(act + repolen + 18 + setlen, "masked", 7) ;
if (mkdir(act, 02755) == -1)
{
cleanup(tmp) ;
strerr_diefu2sys(111, "mkdir ", act) ;
}
memcpy(act + repolen + 18 + setlen, "onboot", 7) ;
if (mkdir(act, 02755) == -1)
{
cleanup(tmp) ;
strerr_diefu2sys(111, "mkdir ", act) ;
}
memcpy(onb, act, repolen + 25 + setlen) ;
memcpy(act + repolen + 18 + setlen, "active", 7) ;
if (mkdir(act, 02755) == -1)
{
cleanup(tmp) ;
strerr_diefu2sys(111, "mkdir ", act) ;
}
DIR *dir = opendir(everything) ;
for (;;)
{
char *cur = act ;
size_t len ;
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
len = strlen(d->d_name) ;
char src[len + 33] ;
char dst[repolen + 26 + setlen + len] ;
memcpy(src, "../.everything/", 15) ;
memcpy(src + 15, d->d_name, len) ;
memcpy(src + 15 + len, "/flag-essential", 16) ;
if (access(src, F_OK) == -1)
{
if (errno != ENOENT) strerr_diefu2sys(111, "access ", src) ;
}
else cur = onb ;
memcpy(src + 21 + len, "recommended", 12) ;
if (access(src, F_OK) == -1)
{
if (errno != ENOENT) strerr_diefu2sys(111, "access ", src) ;
}
else cur = onb ;
src[15 + len] = 0 ;
memcpy(dst, cur, repolen + 24 + setlen) ;
dst[repolen + 24 + setlen] = '/' ;
memcpy(dst + repolen + 25 + setlen, d->d_name, len+1) ;
if (symlink(src, dst) == -1)
{
cleanup(tmp) ;
strerr_diefu4sys(111, "symlink ", src, " to ", dst) ;
}
}
dir_close(dir) ;
if (errno)
{
cleanup(tmp) ;
strerr_diefu2sys(111, "readdir ", tmp) ;
}
if (chmod(tmp, 02755) == -1)
{
cleanup(tmp) ;
strerr_diefu2sys(111, "chmod ", tmp) ;
}
if (symlink(tmp, fn) == -1)
{
cleanup(tmp) ;
strerr_diefu4sys(111, "rename ", tmp, " to ", fn) ;
}
}
enum gola_e
{
GOLA_VERBOSITY,
GOLA_REPODIR,
GOLA_N
} ;
static gol_arg const rgola[2] =
{
{ .so = 'v', .lo = "verbosity", .i = GOLA_VERBOSITY },
{ .so = 'r', .lo = "repodir", .i = GOLA_REPODIR }
} ;
int main (int argc, char const *const *argv)
{
char const *repo = S6RC_REPO_BASE ;
int fdlock ;
unsigned int verbosity = 1 ;
char const *wgola[2] = { 0 } ;
unsigned int golc ;
PROG = "s6-rc-set-new" ;
golc = gol_main(argc, argv, 0, 0, rgola, 2, 0, wgola) ;
argc -= golc ; argv += golc ;
if (wgola[GOLA_VERBOSITY] && !uint0_scan(wgola[GOLA_VERBOSITY], &verbosity))
strerr_dief1x(100, "verbosity needs to be an unsigned integer") ;
if (wgola[GOLA_REPODIR]) repo = wgola[GOLA_REPODIR] ;
if (!argc) dieusage() ;
for (unsigned int i = 0 ; i < argc ; i++)
{
if (!argv[i][0]) strerr_dief1x(100, "set names cannot be empty") ;
if (argv[i][0] == '.') strerr_dief1x(100, "set names cannot start with a dot") ;
if (strchr(argv[i], '/') || strchr(argv[i], '\n'))
strerr_dief1x(100, "set names cannot contain / or newlines") ;
}
fdlock = s6rc_repo_lock(repo, 1) ;
if (fdlock == -1) strerr_diefu2sys(111, "lock ", repo) ;
tain_now_g() ;
for (unsigned int i = 0 ; i < argc ; i++)
newset(repo, argv[i]) ;
return 0 ;
}
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