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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/djbunix.h>
#include <skalibs/random.h>
#include <s6-rc/config.h>
#include <s6-rc/s6rc.h>
#define USAGE "s6-rc-repo-init [ -v verbosity ] [ -r repo ] [ -h fdhuser ] sources..."
#define dieusage() strerr_dieusage(100, USAGE)
static void cleanup (char const *fn)
{
int e = errno ;
rm_rf(fn) ;
errno = e ;
}
enum golb_e
{
GOLB_FORCE,
GOLB_N
} ;
static gol_bool const rgolb[1] =
{
{ .so = 'f', .lo = "force", .clear = 0, .set = 1 << GOLB_FORCE }
} ;
enum gola_e
{
GOLA_VERBOSITY,
GOLA_REPODIR,
GOLA_FDHUSER,
GOLA_N
} ;
static gol_arg const rgola[3] =
{
{ .so = 'v', .lo = "verbosity", .i = GOLA_VERBOSITY },
{ .so = 'r', .lo = "repodir", .i = GOLA_REPODIR },
{ .so = 'h', .lo = "fdhuser", .i = GOLA_FDHUSER }
} ;
int main (int argc, char const *const *argv)
{
size_t repolen ;
char const *repo = S6RC_REPO_BASE ;
unsigned int verbosity = 1 ;
mode_t m ;
char const *wgola[3] = { 0 } ;
uint64_t wgolb = 0 ;
unsigned int golc ;
PROG = "s6-rc-repo-init" ;
golc = gol_main(argc, argv, rgolb, 1, rgola, 3, &wgolb, 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] ;
for (unsigned int i = 0 ; i < argc ; i++)
if (argv[i][0] != '/')
strerr_dief2x(100, argv[i], " is not an absolute path") ;
if (!argc) strerr_warnw1x("no source directories given, creating an empty repository") ;
tain_now_g() ;
repolen = strlen(repo) ;
char repotmp[repolen + 12] ;
char tmp[repolen + 21] ;
memcpy(repotmp, repo, repolen) ;
memcpy(repotmp + repolen, "-tmp.XXXXXX", 12) ;
m = umask(0) ;
if (!mkdtemp(repotmp))
{
size_t i = repolen ;
if (errno != ENOENT)
strerr_diefu2sys(111, "mkdtemp ", repotmp) ;
while (i && repotmp[i] != '/') i-- ;
repotmp[i] = 0 ;
if (mkdirp2(repotmp, 02755) == -1)
strerr_diefu2sys(111, "mkdir ", repotmp) ;
repotmp[i] = '/' ;
memcpy(repotmp + repolen, ":new:XXXXXX", 12) ;
if (!mkdtemp(repotmp))
strerr_diefu2sys(111, "mkdtemp ", repotmp) ;
}
memcpy(tmp, repotmp, repolen + 11) ;
tmp[repolen + 11] = '/' ;
memcpy(tmp + repolen + 12, "compiled", 9) ;
if (mkdir(tmp, 02755) == -1)
{
cleanup(repotmp) ;
strerr_diefu2sys(111, "mkdir ", tmp) ;
}
memcpy(tmp + repolen + 12, "sources", 8) ;
if (mkdir(tmp, 02755) == -1)
{
cleanup(repotmp) ;
strerr_diefu2sys(111, "mkdir ", tmp) ;
}
umask(m) ;
memcpy(tmp + repolen + 12, "lock", 5) ;
if (!openwritenclose_unsafe5(tmp, "", 0, 0, 0))
{
cleanup(repotmp) ;
strerr_diefu2sys(111, "create ", tmp) ;
}
if (!s6rc_repo_sync(repotmp, argv, argc, verbosity, wgola[GOLA_FDHUSER]))
{
cleanup(repotmp) ;
return 111 ;
}
if (chmod(repotmp, 02755) == -1)
strerr_diefu2sys(111, "chmod ", repotmp) ;
if (rename(repotmp, repo) == -1)
{
if (errno != EEXIST || !(wgolb & 1 << GOLB_FORCE))
{
cleanup(repotmp) ;
strerr_diefu4sys(111, "rename ", repotmp, " to ", repo) ;
}
else
{
memcpy(tmp, repo, repolen) ;
memcpy(tmp + repolen, ":old:", 5) ;
random_name(tmp + repolen + 5, 15) ;
tmp[repolen + 20] = 0 ;
if (rename(repo, tmp) == -1)
{
cleanup(repotmp) ;
strerr_diefu4sys(111, "rename ", repo, " to ", tmp) ;
}
if (rename(repotmp, repo) == -1)
{
int e = errno ;
if (rename(tmp, repo) == -1)
strerr_diefu7sys(111, "rename directories to ", repo, ": weird race happened. New repository is at ", repotmp, " and old repository is at ", tmp, " - reported error was") ;
errno = e ;
cleanup(repotmp) ;
strerr_diefu4sys(111, "rename ", repotmp, " to ", repo) ;
}
}
}
return 0 ;
}
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