diff options
Diffstat (limited to 'unix/sftp.c')
| -rw-r--r-- | unix/sftp.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/unix/sftp.c b/unix/sftp.c new file mode 100644 index 00000000..023f41ee --- /dev/null +++ b/unix/sftp.c @@ -0,0 +1,584 @@ +/* + * sftp.c: the Unix-specific parts of PSFTP and PSCP. + */ + +#include <sys/time.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdlib.h> +#include <fcntl.h> +#include <dirent.h> +#include <unistd.h> +#include <utime.h> +#include <errno.h> +#include <assert.h> + +#include "putty.h" +#include "ssh.h" +#include "psftp.h" + +#if HAVE_GLOB_H +#include <glob.h> +#endif + +char *x_get_default(const char *key) +{ + return NULL; /* this is a stub */ +} + +void platform_get_x11_auth(struct X11Display *display, Conf *conf) +{ + /* Do nothing, therefore no auth. */ +} +const bool platform_uses_x11_unix_by_default = true; + +/* + * Default settings that are specific to PSFTP. + */ +char *platform_default_s(const char *name) +{ + return NULL; +} + +bool platform_default_b(const char *name, bool def) +{ + return def; +} + +int platform_default_i(const char *name, int def) +{ + return def; +} + +FontSpec *platform_default_fontspec(const char *name) +{ + return fontspec_new(""); +} + +Filename *platform_default_filename(const char *name) +{ + if (!strcmp(name, "LogFileName")) + return filename_from_str("putty.log"); + else + return filename_from_str(""); +} + +SeatPromptResult filexfer_get_userpass_input(Seat *seat, prompts_t *p) +{ + /* The file transfer tools don't support Restart Session, so we + * can just have a single static cmdline_get_passwd_input_state + * that's never reset */ + static cmdline_get_passwd_input_state cmdline_state = + CMDLINE_GET_PASSWD_INPUT_STATE_INIT; + + SeatPromptResult spr; + spr = cmdline_get_passwd_input(p, &cmdline_state, false); + if (spr.kind == SPRK_INCOMPLETE) + spr = console_get_userpass_input(p); + return spr; +} + +/* + * Set local current directory. Returns NULL on success, or else an + * error message which must be freed after printing. + */ +char *psftp_lcd(char *dir) +{ + if (chdir(dir) < 0) + return dupprintf("%s: chdir: %s", dir, strerror(errno)); + else + return NULL; +} + +/* + * Get local current directory. Returns a string which must be + * freed. + */ +char *psftp_getcwd(void) +{ + char *buffer, *ret; + size_t size = 256; + + buffer = snewn(size, char); + while (1) { + ret = getcwd(buffer, size); + if (ret != NULL) + return ret; + if (errno != ERANGE) { + sfree(buffer); + return dupprintf("[cwd unavailable: %s]", strerror(errno)); + } + /* + * Otherwise, ERANGE was returned, meaning the buffer + * wasn't big enough. + */ + sgrowarray(buffer, size, size); + } +} + +struct RFile { + int fd; +}; + +RFile *open_existing_file(const char *name, uint64_t *size, + unsigned long *mtime, unsigned long *atime, + long *perms) +{ + int fd; + RFile *ret; + + fd = open(name, O_RDONLY); + if (fd < 0) + return NULL; + + ret = snew(RFile); + ret->fd = fd; + + if (size || mtime || atime || perms) { + struct stat statbuf; + if (fstat(fd, &statbuf) < 0) { + fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); + memset(&statbuf, 0, sizeof(statbuf)); + } + + if (size) + *size = statbuf.st_size; + + if (mtime) + *mtime = statbuf.st_mtime; + + if (atime) + *atime = statbuf.st_atime; + + if (perms) + *perms = statbuf.st_mode; + } + + return ret; +} + +int read_from_file(RFile *f, void *buffer, int length) +{ + return read(f->fd, buffer, length); +} + +void close_rfile(RFile *f) +{ + close(f->fd); + sfree(f); +} + +struct WFile { + int fd; + char *name; +}; + +WFile *open_new_file(const char *name, long perms) +{ + int fd; + WFile *ret; + + fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, + (mode_t)(perms ? perms : 0666)); + if (fd < 0) + return NULL; + + ret = snew(WFile); + ret->fd = fd; + ret->name = dupstr(name); + + return ret; +} + + +WFile *open_existing_wfile(const char *name, uint64_t *size) +{ + int fd; + WFile *ret; + + fd = open(name, O_APPEND | O_WRONLY); + if (fd < 0) + return NULL; + + ret = snew(WFile); + ret->fd = fd; + ret->name = dupstr(name); + + if (size) { + struct stat statbuf; + if (fstat(fd, &statbuf) < 0) { + fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); + memset(&statbuf, 0, sizeof(statbuf)); + } + + *size = statbuf.st_size; + } + + return ret; +} + +int write_to_file(WFile *f, void *buffer, int length) +{ + char *p = (char *)buffer; + int so_far = 0; + + /* Keep trying until we've really written as much as we can. */ + while (length > 0) { + int ret = write(f->fd, p, length); + + if (ret < 0) + return ret; + + if (ret == 0) + break; + + p += ret; + length -= ret; + so_far += ret; + } + + return so_far; +} + +void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) +{ + struct utimbuf ut; + + ut.actime = atime; + ut.modtime = mtime; + + utime(f->name, &ut); +} + +/* Closes and frees the WFile */ +void close_wfile(WFile *f) +{ + close(f->fd); + sfree(f->name); + sfree(f); +} + +/* Seek offset bytes through file, from whence, where whence is + FROM_START, FROM_CURRENT, or FROM_END */ +int seek_file(WFile *f, uint64_t offset, int whence) +{ + int lseek_whence; + + switch (whence) { + case FROM_START: + lseek_whence = SEEK_SET; + break; + case FROM_CURRENT: + lseek_whence = SEEK_CUR; + break; + case FROM_END: + lseek_whence = SEEK_END; + break; + default: + return -1; + } + + return lseek(f->fd, offset, lseek_whence) >= 0 ? 0 : -1; +} + +uint64_t get_file_posn(WFile *f) +{ + return lseek(f->fd, (off_t) 0, SEEK_CUR); +} + +int file_type(const char *name) +{ + struct stat statbuf; + + if (stat(name, &statbuf) < 0) { + if (errno != ENOENT) + fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); + return FILE_TYPE_NONEXISTENT; + } + + if (S_ISREG(statbuf.st_mode)) + return FILE_TYPE_FILE; + + if (S_ISDIR(statbuf.st_mode)) + return FILE_TYPE_DIRECTORY; + + return FILE_TYPE_WEIRD; +} + +struct DirHandle { + DIR *dir; +}; + +DirHandle *open_directory(const char *name, const char **errmsg) +{ + DIR *dir; + DirHandle *ret; + + dir = opendir(name); + if (!dir) { + *errmsg = strerror(errno); + return NULL; + } + + ret = snew(DirHandle); + ret->dir = dir; + return ret; +} + +char *read_filename(DirHandle *dir) +{ + struct dirent *de; + + do { + de = readdir(dir->dir); + if (de == NULL) + return NULL; + } while ((de->d_name[0] == '.' && + (de->d_name[1] == '\0' || + (de->d_name[1] == '.' && de->d_name[2] == '\0')))); + + return dupstr(de->d_name); +} + +void close_directory(DirHandle *dir) +{ + closedir(dir->dir); + sfree(dir); +} + +int test_wildcard(const char *name, bool cmdline) +{ + struct stat statbuf; + + if (stat(name, &statbuf) == 0) { + return WCTYPE_FILENAME; + } else if (cmdline) { + /* + * On Unix, we never need to parse wildcards coming from + * the command line, because the shell will have expanded + * them into a filename list already. + */ + return WCTYPE_NONEXISTENT; + } else { +#if HAVE_GLOB_H + glob_t globbed; + int ret = WCTYPE_NONEXISTENT; + + if (glob(name, GLOB_ERR, NULL, &globbed) == 0) { + if (globbed.gl_pathc > 0) + ret = WCTYPE_WILDCARD; + globfree(&globbed); + } + + return ret; +#else + /* On a system without glob.h, we just have to return a + * failure code */ + return WCTYPE_NONEXISTENT; +#endif + } +} + +/* + * Actually return matching file names for a local wildcard. + */ +#if HAVE_GLOB_H +struct WildcardMatcher { + glob_t globbed; + int i; +}; +WildcardMatcher *begin_wildcard_matching(const char *name) { + WildcardMatcher *ret = snew(WildcardMatcher); + + if (glob(name, 0, NULL, &ret->globbed) < 0) { + sfree(ret); + return NULL; + } + + ret->i = 0; + + return ret; +} +char *wildcard_get_filename(WildcardMatcher *dir) { + if (dir->i < dir->globbed.gl_pathc) { + return dupstr(dir->globbed.gl_pathv[dir->i++]); + } else + return NULL; +} +void finish_wildcard_matching(WildcardMatcher *dir) { + globfree(&dir->globbed); + sfree(dir); +} +#else +WildcardMatcher *begin_wildcard_matching(const char *name) +{ + return NULL; +} +char *wildcard_get_filename(WildcardMatcher *dir) +{ + unreachable("Can't construct a valid WildcardMatcher without <glob.h>"); +} +void finish_wildcard_matching(WildcardMatcher *dir) +{ + unreachable("Can't construct a valid WildcardMatcher without <glob.h>"); +} +#endif + +char *stripslashes(const char *str, bool local) +{ + char *p; + + /* + * On Unix, we do the same thing regardless of the 'local' + * parameter. + */ + p = strrchr(str, '/'); + if (p) str = p+1; + + return (char *)str; +} + +bool vet_filename(const char *name) +{ + if (strchr(name, '/')) + return false; + + if (name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2]))) + return false; + + return true; +} + +bool create_directory(const char *name) +{ + return mkdir(name, 0777) == 0; +} + +char *dir_file_cat(const char *dir, const char *file) +{ + ptrlen dir_pl = ptrlen_from_asciz(dir); + return dupcat( + dir, ptrlen_endswith(dir_pl, PTRLEN_LITERAL("/"), NULL) ? "" : "/", + file); +} + +/* + * Do a select() between all currently active network fds and + * optionally stdin, using cli_main_loop. + */ + +struct ssh_sftp_mainloop_ctx { + bool include_stdin, no_fds_ok; + int toret; +}; +static bool ssh_sftp_pw_setup(void *vctx, pollwrapper *pw) +{ + struct ssh_sftp_mainloop_ctx *ctx = (struct ssh_sftp_mainloop_ctx *)vctx; + int fdstate, rwx; + + if (!ctx->no_fds_ok && !toplevel_callback_pending() && + first_fd(&fdstate, &rwx) < 0) { + ctx->toret = -1; + return false; /* terminate cli_main_loop */ + } + + if (ctx->include_stdin) + pollwrap_add_fd_rwx(pw, 0, SELECT_R); + + return true; +} +static void ssh_sftp_pw_check(void *vctx, pollwrapper *pw) +{ + struct ssh_sftp_mainloop_ctx *ctx = (struct ssh_sftp_mainloop_ctx *)vctx; + + if (ctx->include_stdin && pollwrap_check_fd_rwx(pw, 0, SELECT_R)) + ctx->toret = 1; +} +static bool ssh_sftp_mainloop_continue(void *vctx, bool found_any_fd, + bool ran_any_callback) +{ + struct ssh_sftp_mainloop_ctx *ctx = (struct ssh_sftp_mainloop_ctx *)vctx; + if (ctx->toret != 0 || found_any_fd || ran_any_callback) + return false; /* finish the loop */ + return true; +} +static int ssh_sftp_do_select(bool include_stdin, bool no_fds_ok) +{ + struct ssh_sftp_mainloop_ctx ctx[1]; + ctx->include_stdin = include_stdin; + ctx->no_fds_ok = no_fds_ok; + ctx->toret = 0; + + cli_main_loop(ssh_sftp_pw_setup, ssh_sftp_pw_check, + ssh_sftp_mainloop_continue, ctx); + + return ctx->toret; +} + +/* + * Wait for some network data and process it. + */ +int ssh_sftp_loop_iteration(void) +{ + return ssh_sftp_do_select(false, false); +} + +/* + * Read a PSFTP command line from stdin. + */ +char *ssh_sftp_get_cmdline(const char *prompt, bool no_fds_ok) +{ + char *buf; + size_t buflen, bufsize; + int ret; + + fputs(prompt, stdout); + fflush(stdout); + + buf = NULL; + buflen = bufsize = 0; + + while (1) { + ret = ssh_sftp_do_select(true, no_fds_ok); + if (ret < 0) { + printf("connection died\n"); + sfree(buf); + return NULL; /* woop woop */ + } + if (ret > 0) { + sgrowarray(buf, bufsize, buflen); + ret = read(0, buf+buflen, 1); + if (ret < 0) { + perror("read"); + sfree(buf); + return NULL; + } + if (ret == 0) { + /* eof on stdin; no error, but no answer either */ + sfree(buf); + return NULL; + } + + if (buf[buflen++] == '\n') { + /* we have a full line */ + return buf; + } + } + } +} + +void frontend_net_error_pending(void) {} + +void platform_psftp_pre_conn_setup(LogPolicy *lp) {} + +const bool buildinfo_gtk_relevant = false; + +/* + * Main program: do platform-specific initialisation and then call + * psftp_main(). + */ +int main(int argc, char *argv[]) +{ + uxsel_init(); + return psftp_main(argc, argv); +} |