From f5e48e94a2f4d4bbd6e5628c7f2afafc6dbcc459 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 7 Mar 2024 17:28:52 -0500 Subject: build: Build mlibc + add distclean target Signed-off-by: Ian Moffett --- lib/mlibc/options/glibc/generic/shadow-stubs.cpp | 217 ----------------------- 1 file changed, 217 deletions(-) delete mode 100644 lib/mlibc/options/glibc/generic/shadow-stubs.cpp (limited to 'lib/mlibc/options/glibc/generic/shadow-stubs.cpp') diff --git a/lib/mlibc/options/glibc/generic/shadow-stubs.cpp b/lib/mlibc/options/glibc/generic/shadow-stubs.cpp deleted file mode 100644 index 9ce6584..0000000 --- a/lib/mlibc/options/glibc/generic/shadow-stubs.cpp +++ /dev/null @@ -1,217 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -/* - * The code in this file is largely based on or taken from musl. - * This includes: - * - xatol - * - __parsespent - * - cleanup - * - getspnam_r - * - getspnam - */ -#define NUM(n) ((n) == -1 ? 0 : -1), ((n) == -1 ? 0 : (n)) - -int putspent(const struct spwd *sp, FILE *f) { - auto str = [] (char *s) { - return ((s) ? (s) : ""); - }; - return fprintf(f, "%s:%s:%.*d:%.*d:%.*d:%.*d:%.*d:%.*d:%.*u\n", - str(sp->sp_namp), str(sp->sp_pwdp), NUM(sp->sp_lstchg), - NUM(sp->sp_min), NUM(sp->sp_max), NUM(sp->sp_warn), - NUM(sp->sp_inact), NUM(sp->sp_expire), NUM((int)sp->sp_flag)) < 0 ? -1 : 0; -} -#undef NUM - -static long xatol(char **s) { - long x; - if(**s == ':' || **s == '\n') { - return -1; - } - for(x = 0; (unsigned int)**s - '0' < 10U; ++*s) { - x = 10 * x + (**s - '0'); - } - return x; -} - -static int __parsespent(char *s, struct spwd *sp) { - sp->sp_namp = s; - if(!(s = strchr(s, ':'))) { - return -1; - } - *s = 0; - - sp->sp_pwdp = ++s; - if(!(s = strchr(s, ':'))) { - return -1; - } - *s = 0; - - s++; - sp->sp_lstchg = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_min = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_max = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_warn = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_inact = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_expire = xatol(&s); - if(*s != ':') { - return -1; - } - - s++; - sp->sp_flag = xatol(&s); - if(*s != '\n') { - return -1; - } - return 0; -} - -static void cleanup(void *p) { - fclose((FILE *)p); -} - -int getspnam_r(const char *name, struct spwd *sp, char *buf, size_t size, struct spwd **res) { - char path[20 + NAME_MAX]; - FILE *f = 0; - int rv = 0; - int fd; - size_t k, l = strlen(name); - int skip = 0; - int cs; - int orig_errno = errno; - - *res = 0; - - /* Disallow potentially-malicious user names */ - if(*name=='.' || strchr(name, '/') || !l) { - return errno = EINVAL; - } - - /* Buffer size must at least be able to hold name, plus some.. */ - if(size < l + 100) { - return errno = ERANGE; - } - - /* Protect against truncation */ - if(snprintf(path, sizeof path, "/etc/tcb/%s/shadow", name) >= (int)sizeof path) { - return errno = EINVAL; - } - - fd = open(path, O_RDONLY|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC); - if(fd >= 0) { - struct stat st = {}; - errno = EINVAL; - if(fstat(fd, &st) || !S_ISREG(st.st_mode) || !(f = fdopen(fd, "rb"))) { - pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); - close(fd); - pthread_setcancelstate(cs, 0); - return errno; - } - } else { - if(errno != ENOENT && errno != ENOTDIR) { - return errno; - } - f = fopen("/etc/shadow", "rbe"); - if(!f) { - if(errno != ENOENT && errno != ENOTDIR) { - return errno; - } - return 0; - } - } - - pthread_cleanup_push(cleanup, f); - while(fgets(buf, size, f) && (k = strlen(buf)) > 0) { - if(skip || strncmp(name, buf, l) || buf[l] != ':') { - skip = buf[k - 1] != '\n'; - continue; - } - if(buf[k - 1] != '\n') { - rv = ERANGE; - break; - } - - if(__parsespent(buf, sp) < 0) { - continue; - } - *res = sp; - break; - } - pthread_cleanup_pop(1); - errno = rv ? rv : orig_errno; - return rv; -} - -int lckpwdf(void) { - mlibc::infoLogger() << "mlibc: lckpwdf is unimplemented like musl" << frg::endlog; - return 0; -} - -int ulckpwdf(void) { - mlibc::infoLogger() << "mlibc: ulckpwdf is unimplemented like musl" << frg::endlog; - return 0; -} - -// Musl defines LINE_LIM to 256 -#define LINE_LIM 256 - -struct spwd *getspnam(const char *name) { - static struct spwd sp; - static char *line; - struct spwd *res; - int e; - int orig_errno = errno; - - if(!line) { - line = (char *)malloc(LINE_LIM); - } - if(!line) { - return 0; - } - e = getspnam_r(name, &sp, line, LINE_LIM, &res); - errno = e ? e : orig_errno; - return res; -} - -struct spwd *fgetspent(FILE *) { - __ensure(!"Not implemented"); - __builtin_unreachable(); -} - -void endspent(void) { - mlibc::infoLogger() << "mlibc: endspent is a stub" << frg::endlog; -} -- cgit v1.2.3