From f03a640f6af7cef470c452970f6031d41a61f227 Mon Sep 17 00:00:00 2001 From: "Anna (navi) Figueiredo Gomes" Date: Sun, 14 Jul 2024 17:41:47 +0200 Subject: openrc-run: allow multiplexed symlinks to live outside init.d use the realpath of the target to locate which sysconf dir it's in, using it as a base to load the config file. the service path is then normalized from the symlink without dereferencing it. Signed-off-by: Anna (navi) Figueiredo Gomes --- src/openrc-run/openrc-run.c | 123 ++++++++++++++++++++++++++++---------------- 1 file changed, 80 insertions(+), 43 deletions(-) (limited to 'src/openrc-run/openrc-run.c') diff --git a/src/openrc-run/openrc-run.c b/src/openrc-run/openrc-run.c index 5856a368..46c9364a 100644 --- a/src/openrc-run/openrc-run.c +++ b/src/openrc-run/openrc-run.c @@ -210,21 +210,21 @@ restore_state(void) if (rc_in_plugin || exclusive_fd == -1) return; - state = rc_service_state(applet); + state = rc_service_state(service); if (state & RC_SERVICE_STOPPING) { if (state & RC_SERVICE_WASINACTIVE) - rc_service_mark(applet, RC_SERVICE_INACTIVE); + rc_service_mark(service, RC_SERVICE_INACTIVE); else - rc_service_mark(applet, RC_SERVICE_STARTED); + rc_service_mark(service, RC_SERVICE_STARTED); if (rc_runlevel_stopping()) - rc_service_mark(applet, RC_SERVICE_FAILED); + rc_service_mark(service, RC_SERVICE_FAILED); } else if (state & RC_SERVICE_STARTING) { if (state & RC_SERVICE_WASINACTIVE) - rc_service_mark(applet, RC_SERVICE_INACTIVE); + rc_service_mark(service, RC_SERVICE_INACTIVE); else - rc_service_mark(applet, RC_SERVICE_STOPPED); + rc_service_mark(service, RC_SERVICE_STOPPED); if (rc_runlevel_starting()) - rc_service_mark(applet, RC_SERVICE_FAILED); + rc_service_mark(service, RC_SERVICE_FAILED); } exclusive_fd = svc_unlock(applet, exclusive_fd); } @@ -1099,17 +1099,72 @@ service_plugable(void) return allow; } +static char * +normalize_path(const char *src) +{ + char *path; + size_t path_len; + size_t src_len = strlen(src); + + if (src_len == 0 || src[0] != '/') { + char pwd[PATH_MAX]; + size_t pwd_len; + + if (getcwd(pwd, sizeof(pwd)) == NULL) + return NULL; + + pwd_len = strlen(pwd); + path = xmalloc(pwd_len + 1 + src_len + 1); + memcpy(path, pwd, pwd_len); + path_len = pwd_len; + } else { + path = xmalloc((src_len > 0 ? src_len : 1) + 1); + path_len = 0; + } + + for (const char *ptr = src, *next; ptr < src + src_len; ptr = next + 1) { + size_t len; + next = strchr(ptr, '/'); + if (!next) + next = src + src_len; + len = next - ptr; + switch (len) { + case 2: + if (ptr[0] == '.' && ptr[1] == '.') { + const char *slash = strrchr(path, '/'); + if (slash) + path_len = slash - path; + continue; + } + break; + case 1: + if (ptr[0] == '.') + continue; + break; + case 0: + continue; + } + path[path_len++] = '/'; + memcpy(&path[path_len], ptr, len); + path_len += len; + } + + if (path_len == 0) + path[path_len++] = '/'; + + path[path_len] = '\0'; + return path; +} + int main(int argc, char **argv) { bool doneone = false; int retval, opt, depoptions = RC_DEP_TRACE; RC_STRING *svc; char *path = NULL; - char *lnk = NULL; - char *dir, *save = NULL, *saveLnk = NULL; + char *dir, *save = NULL; char *pidstr = NULL; size_t l = 0, ll; - const char *file; struct stat stbuf; /* Show help if insufficient args */ @@ -1118,8 +1173,6 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } - applet = basename_c(argv[0]); - if (rc_yesno(getenv("RC_USER_SERVICES"))) rc_set_user(); @@ -1129,45 +1182,29 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } - atexit(cleanup); - /* We need to work out the real full path to our service. - * This works fine, provided that we ONLY allow multiplexed services - * to exist in the same directory as the master link. - * Also, the master link as to be a real file in the init dir. */ + * multiplexed services must point to a target in a init dir. */ path = realpath(argv[1], NULL); if (!path) { fprintf(stderr, "realpath: %s\n", strerror(errno)); exit(EXIT_FAILURE); } - lnk = xmalloc(4096); - memset(lnk, 0, 4096); - if (readlink(argv[1], lnk, 4096-1)) { - dir = dirname(path); - if (strchr(lnk, '/')) { - save = xstrdup(dir); - saveLnk = xstrdup(lnk); - dir = dirname(saveLnk); - if (strcmp(dir, save) == 0) - file = basename_c(argv[1]); - else - file = basename_c(lnk); - dir = save; - } else - file = basename_c(argv[1]); - xasprintf(&service, "%s/%s", dir, file); - if (stat(service, &stbuf) != 0) { - free(service); - service = xstrdup(lnk); - } - free(save); - free(saveLnk); + save = dirname(path); + dir = strrchr(save, '/'); + if (!dir || strcmp(dir, "/init.d") != 0) { + fprintf(stderr, "%s is not an init dir", path); + exit(EXIT_FAILURE); } - free(lnk); - if (!service) - service = xstrdup(path); + *dir = '\0'; + + setenv("RC_SYSCONF_DIR", save, true); + free(path); + + service = normalize_path(argv[1]); applet = basename_c(service); + atexit(cleanup); + if (argc < 3) usage(EXIT_FAILURE); @@ -1400,7 +1437,7 @@ int main(int argc, char **argv) } else if (strcmp(optarg, "zap") == 0) { einfo("Manually resetting %s to stopped state", applet); - if (!rc_service_mark(applet, + if (!rc_service_mark(service, RC_SERVICE_STOPPED)) eerrorx("rc_service_mark: %s", strerror(errno)); -- cgit v1.2.3