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Diffstat (limited to 'lib/mlibc/options/posix/generic/unistd-stubs.cpp')
-rw-r--r--lib/mlibc/options/posix/generic/unistd-stubs.cpp1227
1 files changed, 1227 insertions, 0 deletions
diff --git a/lib/mlibc/options/posix/generic/unistd-stubs.cpp b/lib/mlibc/options/posix/generic/unistd-stubs.cpp
new file mode 100644
index 0000000..39cf76a
--- /dev/null
+++ b/lib/mlibc/options/posix/generic/unistd-stubs.cpp
@@ -0,0 +1,1227 @@
+#include <stdio.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <unistd.h>
+#include <limits.h>
+#include <termios.h>
+#include <pwd.h>
+#include <sys/ioctl.h>
+
+#include <bits/ensure.h>
+#include <mlibc/allocator.hpp>
+#include <mlibc/arch-defs.hpp>
+#include <mlibc/debug.hpp>
+#include <mlibc/posix-sysdeps.hpp>
+#include <mlibc/bsd-sysdeps.hpp>
+#include <mlibc/thread.hpp>
+
+namespace {
+
+constexpr bool logExecvpeTries = false;
+
+}
+
+unsigned int alarm(unsigned int seconds) {
+ struct itimerval it = {}, old = {};
+ it.it_value.tv_sec = seconds;
+ setitimer(ITIMER_REAL, &it, &old);
+ return old.it_value.tv_sec + !! old.it_value.tv_usec;
+}
+
+int chdir(const char *path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_chdir, -1);
+ if(int e = mlibc::sys_chdir(path); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int fchdir(int fd) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fchdir, -1);
+ if(int e = mlibc::sys_fchdir(fd); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int chown(const char *path, uid_t uid, gid_t gid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fchownat, -1);
+ if(int e = mlibc::sys_fchownat(AT_FDCWD, path, uid, gid, 0); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+ssize_t confstr(int name, char *buf, size_t len) {
+ const char *str = "";
+ if (name == _CS_PATH) {
+ str = "/bin:/usr/bin";
+ } else if(name == _CS_GNU_LIBPTHREAD_VERSION) {
+ // We are not glibc, so we can return 0 here.
+ return 0;
+ } else if(name == _CS_GNU_LIBC_VERSION) {
+ // We are not glibc, so we can return 0 here.
+ return 0;
+ } else {
+ mlibc::infoLogger() << "\e[31mmlibc: confstr() request " << name << " is unimplemented\e[39m"
+ << frg::endlog;
+ __ensure(!"Not implemented");
+ }
+
+ return snprintf(buf, len, "%s", str) + 1;
+}
+
+void _exit(int status) {
+ mlibc::sys_exit(status);
+}
+
+int execl(const char *path, const char *arg0, ...) {
+ // TODO: It's a stupid idea to limit the number of arguments here.
+ char *argv[16];
+ argv[0] = const_cast<char *>(arg0);
+
+ va_list args;
+ int n = 1;
+ va_start(args, arg0);
+ while(true) {
+ __ensure(n < 15);
+ auto argn = va_arg(args, const char *);
+ argv[n++] = const_cast<char *>(argn);
+ if(!argn)
+ break;
+ }
+ va_end(args);
+ argv[n] = nullptr;
+
+ return execve(path, argv, environ);
+}
+
+// This function is taken from musl.
+int execle(const char *path, const char *arg0, ...) {
+ int argc;
+ va_list ap;
+ va_start(ap, arg0);
+ for(argc = 1; va_arg(ap, const char *); argc++);
+ va_end(ap);
+
+ int i;
+ char *argv[argc + 1];
+ char **envp;
+ va_start(ap, arg0);
+ argv[0] = (char *)argv;
+ for(i = 1; i <= argc; i++)
+ argv[i] = va_arg(ap, char *);
+ envp = va_arg(ap, char **);
+ va_end(ap);
+ return execve(path, argv, envp);
+}
+
+// This function is taken from musl
+int execlp(const char *file, const char *argv0, ...) {
+ int argc;
+ va_list ap;
+ va_start(ap, argv0);
+ for(argc = 1; va_arg(ap, const char *); argc++);
+ va_end(ap);
+ {
+ int i;
+ char *argv[argc + 1];
+ va_start(ap, argv0);
+ argv[0] = (char *)argv0;
+ for(i = 1; i < argc; i++)
+ argv[i] = va_arg(ap, char *);
+ argv[i] = NULL;
+ va_end(ap);
+ return execvp(file, argv);
+ }
+}
+
+int execv(const char *path, char *const argv[]) {
+ return execve(path, argv, environ);
+}
+
+int execvp(const char *file, char *const argv[]) {
+ return execvpe(file, argv, environ);
+}
+
+int execvpe(const char *file, char *const argv[], char *const envp[]) {
+ char *null_list[] = {
+ nullptr
+ };
+
+ if(!argv)
+ argv = null_list;
+ if(!envp)
+ envp = null_list;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_execve, -1);
+
+ if(strchr(file, '/')) {
+ int e = mlibc::sys_execve(file, argv, envp);
+ __ensure(e && "sys_execve() is supposed to never return with success");
+ errno = e;
+ return -1;
+ }
+
+ frg::string_view dirs;
+ if(const char *pv = getenv("PATH"); pv) {
+ dirs = pv;
+ }else{
+ dirs = "/bin:/usr/bin";
+ }
+
+ size_t p = 0;
+ int res = ENOENT;
+ while(p < dirs.size()) {
+ size_t s; // Offset of next colon or end of string.
+ if(size_t cs = dirs.find_first(':', p); cs != size_t(-1)) {
+ s = cs;
+ }else{
+ s = dirs.size();
+ }
+
+ frg::string<MemoryAllocator> path{getAllocator()};
+ path += dirs.sub_string(p, s - p);
+ path += "/";
+ path += file;
+
+ if(logExecvpeTries)
+ mlibc::infoLogger() << "mlibc: execvpe() tries '" << path.data() << "'" << frg::endlog;
+
+ int e = mlibc::sys_execve(path.data(), argv, envp);
+ __ensure(e && "sys_execve() is supposed to never return with success");
+ switch(e) {
+ case ENOENT:
+ case ENOTDIR:
+ break;
+ case EACCES:
+ res = EACCES;
+ break;
+ default:
+ errno = e;
+ return -1;
+ }
+
+ p = s + 1;
+ }
+
+ errno = res;
+ return -1;
+}
+
+int faccessat(int dirfd, const char *pathname, int mode, int flags) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_faccessat, -1);
+ if(int e = mlibc::sys_faccessat(dirfd, pathname, mode, flags); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int fchown(int fd, uid_t uid, gid_t gid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fchownat, -1);
+ if(int e = mlibc::sys_fchownat(fd, "", uid, gid, AT_EMPTY_PATH); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int fchownat(int fd, const char *path, uid_t uid, gid_t gid, int flags) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fchownat, -1);
+ if(int e = mlibc::sys_fchownat(fd, path, uid, gid, flags); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int fdatasync(int fd) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fdatasync, -1);
+ if(int e = mlibc::sys_fdatasync(fd); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int fexecve(int, char *const [], char *const []) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+long fpathconf(int, int) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int fsync(int fd) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fsync, -1);
+ if(auto e = mlibc::sys_fsync(fd); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int ftruncate(int fd, off_t size) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_ftruncate, -1);
+ if(int e = mlibc::sys_ftruncate(fd, size); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+char *getcwd(char *buffer, size_t size) {
+ if (buffer) {
+ if (size == 0) {
+ errno = EINVAL;
+ return NULL;
+ }
+ } else if (!buffer) {
+ if (size == 0)
+ size = PATH_MAX;
+
+ buffer = (char *)malloc(size);
+ }
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getcwd, nullptr);
+ if(int e = mlibc::sys_getcwd(buffer, size); e) {
+ errno = e;
+ return NULL;
+ }
+
+ return buffer;
+}
+
+int getgroups(int size, gid_t list[]) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getgroups, -1);
+ int ret;
+ if(int e = mlibc::sys_getgroups(size, list, &ret); e) {
+ errno = e;
+ return -1;
+ }
+ return ret;
+}
+
+long gethostid(void) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int gethostname(char *buffer, size_t bufsize) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_gethostname, -1);
+ if(auto e = mlibc::sys_gethostname(buffer, bufsize); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int sethostname(const char *buffer, size_t bufsize) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_sethostname, -1);
+ if(auto e = mlibc::sys_sethostname(buffer, bufsize); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+// Code taken from musl
+char *getlogin(void) {
+ return getenv("LOGNAME");
+}
+
+int getlogin_r(char *, size_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+// optarg and optind are provided to us by the GLIBC part of the mlibc.
+
+static char *scan = NULL; /* Private scan pointer. */
+
+int getopt(int argc, char *const argv[], const char *optstring) {
+ char c;
+ char *place;
+
+ optarg = NULL;
+
+ if (!scan || *scan == '\0') {
+ if (optind == 0)
+ optind++;
+
+ if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
+ return EOF;
+ if (argv[optind][1] == '-' && argv[optind][2] == '\0') {
+ optind++;
+ return EOF;
+ }
+
+ scan = argv[optind]+1;
+ optind++;
+ }
+
+ c = *scan++;
+ place = strchr(optstring, c);
+
+ if (!place || c == ':') {
+ fprintf(stderr, "%s: unknown option -%c\n", argv[0], c);
+ return '?';
+ }
+
+ place++;
+ if (*place == ':') {
+ if (*scan != '\0') {
+ optarg = scan;
+ scan = NULL;
+ } else if( optind < argc ) {
+ optarg = argv[optind];
+ optind++;
+ } else {
+ fprintf(stderr, "%s: option requires argument -%c\n", argv[0], c);
+ return ':';
+ }
+ }
+
+ return c;
+}
+
+pid_t getpgid(pid_t pid) {
+ pid_t pgid;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getpgid, -1);
+ if(int e = mlibc::sys_getpgid(pid, &pgid); e) {
+ errno = e;
+ return -1;
+ }
+ return pgid;
+}
+
+pid_t getpgrp(void) {
+ return getpgid(0);
+}
+
+pid_t getsid(pid_t pid) {
+ if(!mlibc::sys_getsid) {
+ MLIBC_MISSING_SYSDEP();
+ return -1;
+ }
+ pid_t sid;
+ if(int e = mlibc::sys_getsid(pid, &sid); e) {
+ errno = e;
+ return -1;
+ }
+ return sid;
+}
+
+int lchown(const char *path, uid_t uid, gid_t gid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fchownat, -1);
+ if(int e = mlibc::sys_fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int link(const char *old_path, const char *new_path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_link, -1);
+ if(int e = mlibc::sys_link(old_path, new_path); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int linkat(int olddirfd, const char *old_path, int newdirfd, const char *new_path, int flags) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_linkat, -1);
+ if(int e = mlibc::sys_linkat(olddirfd, old_path, newdirfd, new_path, flags); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+// Code take from musl
+int lockf(int fd, int op, off_t size) {
+ struct flock l = {
+ .l_type = F_WRLCK,
+ .l_whence = SEEK_CUR,
+ .l_start = 0,
+ .l_len = size,
+ .l_pid = 0,
+ };
+
+ switch(op) {
+ case F_TEST:
+ l.l_type = F_RDLCK;
+ if(fcntl(fd, F_GETLK, &l) < 0)
+ return -1;
+ if(l.l_type == F_UNLCK || l.l_pid == getpid())
+ return 0;
+ errno = EACCES;
+ return -1;
+ case F_ULOCK:
+ l.l_type = F_UNLCK;
+ [[fallthrough]];
+ case F_TLOCK:
+ return fcntl(fd, F_SETLK, &l);
+ case F_LOCK:
+ return fcntl(fd, F_SETLKW, &l);
+ }
+
+ errno = EINVAL;
+ return -1;
+}
+
+int nice(int) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+long pathconf(const char *, int name) {
+ switch (name) {
+ case _PC_NAME_MAX:
+ return NAME_MAX;
+ default:
+ mlibc::infoLogger() << "missing pathconf() entry " << name << frg::endlog;
+ errno = EINVAL;
+ return -1;
+ }
+}
+
+int pause(void) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pause, -1);
+ if(int e = mlibc::sys_pause(); e) {
+ errno = e;
+ return -1;
+ }
+ __ensure(!"There is no successful completion return value for pause");
+ __builtin_unreachable();
+}
+
+int pipe(int *fds) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pipe, -1);
+ if(int e = mlibc::sys_pipe(fds, 0); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int pipe2(int *fds, int flags) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pipe, -1);
+ if(int e = mlibc::sys_pipe(fds, flags); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+ssize_t pread(int fd, void *buf, size_t n, off_t off) {
+ ssize_t num_read;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pread, -1);
+ if(int e = mlibc::sys_pread(fd, buf, n, off, &num_read); e) {
+ errno = e;
+ return -1;
+ }
+ return num_read;
+}
+
+ssize_t pwrite(int fd, const void *buf, size_t n, off_t off) {
+ ssize_t num_written;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pwrite, -1);
+ if(int e = mlibc::sys_pwrite(fd, buf, n, off, &num_written); e) {
+ errno = e;
+ return -1;
+ }
+ return num_written;
+}
+
+ssize_t readlink(const char *__restrict path, char *__restrict buffer, size_t max_size) {
+ ssize_t length;
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_readlink, -1);
+ if(int e = mlibc::sys_readlink(path, buffer, max_size, &length); e) {
+ errno = e;
+ return -1;
+ }
+ return length;
+}
+
+ssize_t readlinkat(int, const char *__restrict, char *__restrict, size_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int rmdir(const char *path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_rmdir, -1);
+ if(int e = mlibc::sys_rmdir(path); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int setegid(gid_t egid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setegid, 0);
+ if(int e = mlibc::sys_setegid(egid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int seteuid(uid_t euid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_seteuid, 0);
+ if(int e = mlibc::sys_seteuid(euid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int setgid(gid_t gid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setgid, 0);
+ if(int e = mlibc::sys_setgid(gid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int setpgid(pid_t pid, pid_t pgid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setpgid, -1);
+ if(int e = mlibc::sys_setpgid(pid, pgid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+pid_t setpgrp(void) {
+ return setpgid(0, 0);
+}
+
+int setregid(gid_t rgid, gid_t egid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setregid, -1);
+ if(int e = mlibc::sys_setregid(rgid, egid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int setreuid(uid_t ruid, uid_t euid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setreuid, -1);
+ if(int e = mlibc::sys_setreuid(ruid, euid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+pid_t setsid(void) {
+ if(!mlibc::sys_setsid) {
+ MLIBC_MISSING_SYSDEP();
+ return -1;
+ }
+ pid_t sid;
+ if(int e = mlibc::sys_setsid(&sid); e) {
+ errno = e;
+ return -1;
+ }
+ return sid;
+}
+
+int setuid(uid_t uid) {
+ if(!mlibc::sys_setuid) {
+ MLIBC_MISSING_SYSDEP();
+ mlibc::infoLogger() << "mlibc: missing sysdep sys_setuid(). Returning 0" << frg::endlog;
+ return 0;
+ }
+ if(int e = mlibc::sys_setuid(uid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+void swab(const void *__restrict, void *__restrict, ssize_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int symlink(const char *target_path, const char *link_path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_symlink, -1);
+ if(int e = mlibc::sys_symlink(target_path, link_path); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int symlinkat(const char *target_path, int dirfd, const char *link_path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_symlinkat, -1);
+ if(int e = mlibc::sys_symlinkat(target_path, dirfd, link_path); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+void sync(void) {
+ if(!mlibc::sys_sync) {
+ MLIBC_MISSING_SYSDEP();
+ } else {
+ mlibc::sys_sync();
+ }
+}
+
+long sysconf(int number) {
+ if(mlibc::sys_sysconf) {
+ long ret = 0;
+
+ int e = mlibc::sys_sysconf(number, &ret);
+
+ if(e && e != EINVAL) {
+ errno = e;
+ return -1;
+ }
+
+ if(e != EINVAL) {
+ return ret;
+ }
+ }
+
+ /* default return values, if not overriden by sysdep */
+ switch(number) {
+ case _SC_ARG_MAX:
+ // On linux, it is defined to 2097152 in most cases, so define it to be 2097152
+ return 2097152;
+ case _SC_PAGE_SIZE:
+ return mlibc::page_size;
+ case _SC_OPEN_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_OPEN_MAX) returns fallback value 256\e[39m" << frg::endlog;
+ return 256;
+ case _SC_PHYS_PAGES:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_PHYS_PAGES) returns fallback value 1024\e[39m" << frg::endlog;
+ return 1024;
+ case _SC_NPROCESSORS_ONLN:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_NPROCESSORS_ONLN) returns fallback value 1\e[39m" << frg::endlog;
+ return 1;
+ case _SC_GETPW_R_SIZE_MAX:
+ return NSS_BUFLEN_PASSWD;
+ case _SC_GETGR_R_SIZE_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_GETGR_R_SIZE_MAX) returns fallback value 1024\e[39m" << frg::endlog;
+ return 1024;
+ case _SC_CHILD_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_CHILD_MAX) returns fallback value 25\e[39m" << frg::endlog;
+ // On linux, it is defined to 25 in most cases, so define it to be 25
+ return 25;
+ case _SC_JOB_CONTROL:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_JOB_CONTROL) returns fallback value 1\e[39m" << frg::endlog;
+ // If 1, job control is supported
+ return 1;
+ case _SC_CLK_TCK:
+ // TODO: This should be obsolete?
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_CLK_TCK) is obsolete and returns arbitrary value 1000000\e[39m" << frg::endlog;
+ return 1000000;
+ case _SC_NGROUPS_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_NGROUPS_MAX) returns fallback value 65536\e[39m" << frg::endlog;
+ // On linux, it is defined to 65536 in most cases, so define it to be 65536
+ return 65536;
+ case _SC_RE_DUP_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_RE_DUP_MAX) returns fallback value RE_DUP_MAX\e[39m" << frg::endlog;
+ return RE_DUP_MAX;
+ case _SC_LINE_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_LINE_MAX) returns fallback value 2048\e[39m" << frg::endlog;
+ // Linux defines it as 2048.
+ return 2048;
+ case _SC_XOPEN_CRYPT:
+#if __MLIBC_CRYPT_OPTION
+ return _XOPEN_CRYPT;
+#else
+ return -1;
+#endif /* __MLIBC_CRYPT_OPTION */
+ case _SC_NPROCESSORS_CONF:
+ // TODO: actually return a proper value for _SC_NPROCESSORS_CONF
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_NPROCESSORS_CONF) unconditionally returns fallback value 1\e[39m" << frg::endlog;
+ return 1;
+ case _SC_HOST_NAME_MAX:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf(_SC_HOST_NAME_MAX) unconditionally returns fallback value 256\e[39m" << frg::endlog;
+ return 256;
+ default:
+ mlibc::infoLogger() << "\e[31mmlibc: sysconf() call is not implemented, number: " << number << "\e[39m" << frg::endlog;
+ errno = EINVAL;
+ return -1;
+ }
+}
+
+pid_t tcgetpgrp(int fd) {
+ int pgrp;
+ if(ioctl(fd, TIOCGPGRP, &pgrp) < 0) {
+ return -1;
+ }
+ return pgrp;
+}
+
+int tcsetpgrp(int fd, pid_t pgrp) {
+ return ioctl(fd, TIOCSPGRP, &pgrp);
+}
+
+int truncate(const char *, off_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+char *ttyname(int fd) {
+ const size_t size = 128;
+ static thread_local char buf[size];
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_ttyname, nullptr);
+ if(int e = mlibc::sys_ttyname(fd, buf, size); e) {
+ errno = e;
+ return nullptr;
+ }
+ return buf;
+}
+
+int ttyname_r(int fd, char *buf, size_t size) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_ttyname, -1);
+ if(int e = mlibc::sys_ttyname(fd, buf, size); e) {
+ return e;
+ }
+ return 0;
+}
+
+int unlink(const char *path) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_unlinkat, -1);
+ if(int e = mlibc::sys_unlinkat(AT_FDCWD, path, 0); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int unlinkat(int fd, const char *path, int flags) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_unlinkat, -1);
+ if(int e = mlibc::sys_unlinkat(fd, path, flags); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int getpagesize() {
+ return mlibc::page_size;
+}
+
+// Code taken from musl
+// GLIBC extension for stdin/stdout
+char *getpass(const char *prompt) {
+ int fdin, fdout;
+ struct termios s, t;
+ ssize_t l;
+ static char password[128];
+
+ if((fdin = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) {
+ fdin = STDIN_FILENO;
+ fdout = STDOUT_FILENO;
+ } else {
+ fdout = fdin;
+ }
+
+ tcgetattr(fdin, &t);
+ s = t;
+ t.c_lflag &= ~(ECHO | ISIG);
+ t.c_lflag |= ICANON;
+ t.c_iflag &= ~(INLCR | IGNCR);
+ t.c_iflag |= ICRNL;
+ tcsetattr(fdin, TCSAFLUSH, &t);
+ tcdrain(fdin);
+
+ dprintf(fdout, "%s", prompt);
+
+ l = read(fdin, password, sizeof password);
+ if(l >= 0) {
+ if((l > 0 && password[l - 1] == '\n') || l == sizeof password)
+ l--;
+ password[l] = 0;
+ }
+
+ tcsetattr(fdin, TCSAFLUSH, &s);
+
+ dprintf(fdout, "\n");
+ if(fdin != STDIN_FILENO) {
+ close(fdin);
+ }
+
+ return l < 0 ? 0 : password;
+}
+
+char *get_current_dir_name(void) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+// This is a Linux extension
+pid_t gettid(void) {
+ if(!mlibc::sys_gettid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_gettid()");
+ }
+ return mlibc::sys_gettid();
+}
+
+int getentropy(void *buffer, size_t length) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getentropy, -1);
+ if(length > 256) {
+ errno = EIO;
+ return -1;
+ }
+ if(int e = mlibc::sys_getentropy(buffer, length); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+ssize_t write(int fd, const void *buf, size_t count) {
+ ssize_t bytes_written;
+ if(int e = mlibc::sys_write(fd, buf, count, &bytes_written); e) {
+ errno = e;
+ return (ssize_t)-1;
+ }
+ return bytes_written;
+}
+
+ssize_t read(int fd, void *buf, size_t count) {
+ ssize_t bytes_read;
+ if(int e = mlibc::sys_read(fd, buf, count, &bytes_read); e) {
+ errno = e;
+ return (ssize_t)-1;
+ }
+ return bytes_read;
+}
+
+off_t lseek(int fd, off_t offset, int whence) {
+ off_t new_offset;
+ if(int e = mlibc::sys_seek(fd, offset, whence, &new_offset); e) {
+ errno = e;
+ return (off_t)-1;
+ }
+ return new_offset;
+}
+
+off64_t lseek64(int fd, off64_t offset, int whence) {
+ off64_t new_offset;
+ if(int e = mlibc::sys_seek(fd, offset, whence, &new_offset); e) {
+ errno = e;
+ return (off64_t)-1;
+ }
+ return new_offset;
+}
+
+int close(int fd) {
+ return mlibc::sys_close(fd);
+}
+
+unsigned int sleep(unsigned int secs) {
+ time_t seconds = secs;
+ long nanos = 0;
+ if(!mlibc::sys_sleep) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_sleep()");
+ }
+ mlibc::sys_sleep(&seconds, &nanos);
+ return seconds;
+}
+
+// In contrast to sleep() this functions returns 0/-1 on success/failure.
+int usleep(useconds_t usecs) {
+ time_t seconds = 0;
+ long nanos = usecs * 1000;
+ if(!mlibc::sys_sleep) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_sleep()");
+ }
+ return mlibc::sys_sleep(&seconds, &nanos);
+}
+
+int dup(int fd) {
+ int newfd;
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_dup, -1);
+ if(int e = mlibc::sys_dup(fd, 0, &newfd); e) {
+ errno = e;
+ return -1;
+ }
+ return newfd;
+}
+
+int dup2(int fd, int newfd) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_dup2, -1);
+ if(int e = mlibc::sys_dup2(fd, 0, newfd); e) {
+ errno = e;
+ return -1;
+ }
+ return newfd;
+}
+
+pid_t fork(void) {
+ auto self = mlibc::get_current_tcb();
+ pid_t child;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_fork, -1);
+
+ auto hand = self->atforkEnd;
+ while (hand) {
+ if (hand->prepare)
+ hand->prepare();
+
+ hand = hand->prev;
+ }
+
+ if(int e = mlibc::sys_fork(&child); e) {
+ errno = e;
+ return -1;
+ }
+
+ hand = self->atforkBegin;
+ while (hand) {
+ if (!child) {
+ if (hand->child)
+ hand->child();
+ } else {
+ if (hand->parent)
+ hand->parent();
+ }
+ hand = hand->next;
+ }
+
+ return child;
+}
+
+pid_t vfork(void) {
+ pid_t child;
+ /*
+ * Fork handlers established using pthread_atfork(3) are not
+ * called when a multithreaded program employing the NPTL
+ * threading library calls vfork(). Fork handlers are called
+ * in this case in a program using the LinuxThreads threading
+ * library. (See pthreads(7) for a description of Linux
+ * threading libraries.)
+ * - vfork(2), release 5.13 of the Linux man-pages project
+ *
+ * as a result, we call sys_fork instead of running atforks
+ */
+
+ /* deferring to fork as implementing vfork correctly requires assembly
+ * to handle not mucking up the stack
+ */
+ if(!mlibc::sys_fork) {
+ MLIBC_MISSING_SYSDEP();
+ errno = ENOSYS;
+ return -1;
+ }
+
+ if(int e = mlibc::sys_fork(&child); e) {
+ errno = e;
+ return -1;
+ }
+
+ return child;
+}
+
+int execve(const char *path, char *const argv[], char *const envp[]) {
+ char *null_list[] = {
+ nullptr
+ };
+
+ if(!argv)
+ argv = null_list;
+ if(!envp)
+ envp = null_list;
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_execve, -1);
+ int e = mlibc::sys_execve(path, argv, envp);
+ __ensure(e && "sys_execve() is expected to fail if it returns");
+ errno = e;
+ return -1;
+}
+
+gid_t getgid(void) {
+ if(!mlibc::sys_getgid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_getgid()");
+ }
+ return mlibc::sys_getgid();
+}
+
+gid_t getegid(void) {
+ if(!mlibc::sys_getegid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_getegid()");
+ }
+ return mlibc::sys_getegid();
+}
+
+uid_t getuid(void) {
+ if(!mlibc::sys_getuid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_getuid()");
+ }
+ return mlibc::sys_getuid();
+}
+
+uid_t geteuid(void) {
+ if(!mlibc::sys_geteuid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_geteuid()");
+ }
+ return mlibc::sys_geteuid();
+}
+
+pid_t getpid(void) {
+ if(!mlibc::sys_getpid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_getpid()");
+ }
+ return mlibc::sys_getpid();
+}
+
+pid_t getppid(void) {
+ if(!mlibc::sys_getppid) {
+ MLIBC_MISSING_SYSDEP();
+ __ensure(!"Cannot continue without sys_getppid()");
+ }
+ return mlibc::sys_getppid();
+}
+
+int access(const char *path, int mode) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_access, -1);
+ if(int e = mlibc::sys_access(path, mode); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+char *getusershell(void) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+void setusershell(void) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+void endusershell(void) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int isatty(int fd) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_isatty, 0);
+ if(int e = mlibc::sys_isatty(fd); e) {
+ errno = e;
+ return 0;
+ }
+ return 1;
+}
+
+int chroot(const char *ptr) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_chroot, -1);
+ if(int e = mlibc::sys_chroot(ptr); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int daemon(int, int) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+char *ctermid(char *s) {
+ return s ? strcpy(s, "/dev/tty") : const_cast<char *>("/dev/tty");
+}
+
+int setresuid(uid_t ruid, uid_t euid, uid_t suid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setresuid, -1);
+ if(int e = mlibc::sys_setresuid(ruid, euid, suid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int setresgid(gid_t rgid, gid_t egid, gid_t sgid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setresgid, -1);
+ if(int e = mlibc::sys_setresgid(rgid, egid, sgid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int getdomainname(char *, size_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int setdomainname(const char *, size_t) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+
+int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getresuid, -1);
+ if(int e = mlibc::sys_getresuid(ruid, euid, suid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid) {
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getresgid, -1);
+ if(int e = mlibc::sys_getresgid(rgid, egid, sgid); e) {
+ errno = e;
+ return -1;
+ }
+ return 0;
+}
+
+#if __MLIBC_CRYPT_OPTION
+void encrypt(char[64], int) {
+ __ensure(!"Not implemented");
+ __builtin_unreachable();
+}
+#endif
+
+#if __MLIBC_BSD_OPTION
+void *sbrk(intptr_t increment) {
+ if(increment) {
+ errno = ENOMEM;
+ return (void *)-1;
+ }
+
+ MLIBC_CHECK_OR_ENOSYS(mlibc::sys_brk, (void *)-1);
+ void *out;
+ if(int e = mlibc::sys_brk(&out); e) {
+ errno = e;
+ return (void *)-1;
+ }
+ return out;
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 05:24:10 +0000