From d6d77527fa55d59e47b8e8fa301ab004894bc467 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Mon, 15 Sep 2025 23:15:06 +0000 Subject: Add s6-rc-set-changestate. FINALLY. --- src/repo/s6-rc-set-changestate.c | 204 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 204 insertions(+) create mode 100644 src/repo/s6-rc-set-changestate.c (limited to 'src/repo/s6-rc-set-changestate.c') diff --git a/src/repo/s6-rc-set-changestate.c b/src/repo/s6-rc-set-changestate.c new file mode 100644 index 0000000..89cdea8 --- /dev/null +++ b/src/repo/s6-rc-set-changestate.c @@ -0,0 +1,204 @@ +/* ISC license. */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define USAGE "s6-rc-set-changestate [ -v verbosity ] [ -F forcelevel ] [ -r repo ] [ -3 ] set newstate services..." +#define dieusage() strerr_dieusage(100, USAGE) + +enum golb_e +{ + GOLB_FORCE_ESSENTIAL = 0x01, + GOLB_IGNORE_DEPENDENCIES = 0x02, + GOLB_DRYRUN = 0x04 +} ; + +enum gola_e +{ + GOLA_VERBOSITY, + GOLA_REPODIR, + GOLA_FORCELEVEL, + GOLA_N +} ; + +struct subname_s +{ + char const *name ; + uint8_t sub ; +} ; + +static gol_bool const rgolb[] = +{ + { .so = '3', .lo = "force-essential", .clear = 0, .set = GOLB_FORCE_ESSENTIAL }, + { .so = 'f', .lo = "ignore-dependencies", .clear = 0, .set = GOLB_IGNORE_DEPENDENCIES }, + { .so = 'n', .lo = "dry-run", .clear = 0, .set = GOLB_DRYRUN } +} ; + +static gol_arg const rgola[] = +{ + { .so = 'v', .lo = "verbosity", .i = GOLA_VERBOSITY }, + { .so = 'r', .lo = "repodir", .i = GOLA_REPODIR }, + { .so = 'I', .lo = "if-dependencies-found", .i = GOLA_FORCELEVEL } +} ; + +static struct subname_s const accepted_forcelevels[] = +{ + { .name = "fail", .sub = 0 }, + { .name = "pull", .sub = 2 }, + { .name = "warn", .sub = 1 } +} ; + +static uint64_t wgolb = 0 ; + +static struct subname_s const accepted_subs[] = +{ + { .name = "active", .sub = 1 }, + { .name = "always", .sub = 3 }, + { .name = "disable", .sub = 1 }, + { .name = "disabled", .sub = 1 }, + { .name = "enable", .sub = 2 }, + { .name = "enabled", .sub = 2 }, + { .name = "essential", .sub = 3 }, + { .name = "mask", .sub = 0 }, + { .name = "masked", .sub = 0 }, + { .name = "onboot", .sub = 2 }, + { .name = "unmask", .sub = 1 }, + { .name = "unmasked", .sub = 1 } +} ; + +static int subname_cmp (void const *a, void const *b) +{ + return strcmp((char const *)a, ((struct subname_s const *)b)->name) ; +} + +int main (int argc, char const *const *argv) +{ + stralloc storage = STRALLOC_ZERO ; + genalloc svlist = GENALLOC_ZERO ; /* s6rc_repo_sv */ + char const *repo = S6RC_REPO_BASE ; + int fdlock ; + unsigned int verbosity = 1 ; + unsigned int forcelevel = 1 ; + char const *wgola[3] = { 0 } ; + unsigned int golc ; + struct subname_s *newsub ; + size_t max = 0, m = 0 ; + s6rc_repo_sv *list ; + uint32_t listn ; + + PROG = "s6-rc-set-changestate" ; + golc = gol_main(argc, argv, rgolb, 1, rgola, 2, &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_FORCELEVEL]) + { + struct subname_s *p = bsearch(wgola[GOLA_FORCELEVEL], accepted_forcelevels, sizeof(accepted_forcelevels)/sizeof(struct subname_s), sizeof(struct subname_s), &subname_cmp) ; + if (!p) strerr_dief1x(100, "if-dependencies-found needs to be fail, warn or pull") ; + forcelevel = p->sub ; + } + if (wgola[GOLA_REPODIR]) repo = wgola[GOLA_REPODIR] ; + if (argc < 3) dieusage() ; + if (strchr(argv[0], '/') || strchr(argv[0], '\n')) + strerr_dief1x(100, "set names cannot contain / or newlines") ; + + newsub = bsearch(argv[1], accepted_subs, sizeof(accepted_subs)/sizeof(struct subname_s), sizeof(struct subname_s), &subname_cmp) ; + if (!newsub) strerr_dief2x(100, "unrecognized state change directive:", argv[1]) ; + if (newsub->sub == 3 && !(wgolb & GOLB_FORCE_ESSENTIAL)) + strerr_dief1x(100, " artificially mark a service as essential without --force-essential") ; + + fdlock = s6rc_repo_lock(repo, 1) ; + if (fdlock == -1) strerr_diefu2sys(111, "lock ", repo) ; + tain_now_g() ; + + if (!s6rc_repo_makesvlist(repo, argv[0], &storage, &svlist)) _exit(111) ; + list = genalloc_s(s6rc_repo_sv, &svlist) ; + listn = genalloc_len(s6rc_repo_sv, &svlist) ; + + s6rc_repo_sv starting[argc - 2] ; + uint32_t ind[argc - 2] ; + + for (unsigned int i = 0 ; i < argc - 2 ; i++) + { + s6rc_repo_sv *p = bsearchr(argv[2+i], list, listn, sizeof(s6rc_repo_sv), &s6rc_repo_sv_bcmpr, storage.s) ; + if (!p) strerr_dief6x(100, "unknown service ", argv[2+i], " in set ", argv[0], " of repository ", repo) ; + starting[i] = *p ; + ind[i] = p - list ; + max += strlen(argv[2+i]) + 1 ; + } + + if (!(wgolb & GOLB_IGNORE_DEPENDENCIES)) + { + genalloc badga = GENALLOC_ZERO ; /* uint32_t */ + char const *tmpstart[argc - 2] ; + char tmpstore[max] ; + + for (unsigned int i = 0 ; i < argc - 2 ; i++) + { + size_t len ; + list[ind[i]].sub = newsub->sub ; + tmpstart[i] = tmpstore + m ; + len = strlen(storage.s + list[ind[i]].pos) + 1 ; + memcpy(tmpstore + m, storage.s + list[ind[i]].pos, len) ; + m += len ; + } + + if (!s6rc_repo_badsub(repo, argv[0], tmpstart, argc - 2, newsub->sub, list, listn, &storage, &badga)) _exit(111) ; + if (genalloc_len(uint32_t, &badga)) + { + uint32_t const *bads = genalloc_s(uint32_t, &badga) ; + unsigned int badn = genalloc_len(uint32_t, &badga) ; + if (verbosity) + { + char const *arg[10 + (badn << 1)] ; + arg[0] = PROG ; + arg[1] = ": " ; + arg[2] = !forcelevel ? "fatal" : "warning" ; + arg[3] = ": the following services (" ; + arg[4] = newsub->sub >= 2 ? "dependencies of" : "depending on" ; + arg[5] = " the ones given as arguments) " ; + arg[6] = forcelevel == 2 ? "are also being" : "also need to be" ; + arg[7] = " changed to \"" ; + arg[8] = s6rc_repo_subnames[newsub->sub] ; + arg[9] = "\": " ; + for (unsigned int i = 0 ; i < badn ; i++) + { + arg[10 + (i << 1)] = storage.s + list[bads[i]].pos ; + arg[11 + (i << 1)] = i < badn ? " " : "" ; + } + strerr_warnv(arg, 10 + (badn << 1)) ; + } + if (!forcelevel) _exit(1) ; + if (wgolb & GOLB_DRYRUN) _exit(0) ; + if (forcelevel == 2) + { + s6rc_repo_sv full[argc - 2 + badn] ; + for (unsigned int i = 0 ; i < argc - 2 ; i++) full[i] = starting[i] ; + for (unsigned int i = 0 ; i < badn ; i++) full[argc - 2 + i] = list[bads[i]] ; + if (!s6rc_repo_moveservices(repo, argv[0], full, argc - 2 + badn, newsub->sub, storage.s, verbosity)) _exit(111) ; + _exit(0) ; + } + } + } + + if (!(wgolb & GOLB_DRYRUN)) + { + if (!s6rc_repo_moveservices(repo, argv[0], starting, argc - 2, newsub->sub, storage.s, verbosity)) _exit(111) ; + } + _exit(0) ; +} -- cgit v1.3.1