diff options
author | Glenn L McGrath <bug1@ihug.co.nz> | 2003-01-21 23:55:56 +0300 |
---|---|---|
committer | Glenn L McGrath <bug1@ihug.co.nz> | 2003-01-21 23:55:56 +0300 |
commit | 9e5d6c002ca589fb2e767fc8bafd6ceddaa12d39 (patch) | |
tree | cc4bb2d87b27a82c93e46d0abc3f9ab8a3f3a232 | |
parent | 4c51202b9dfe3df38e0a50bef9b66bd4cae39277 (diff) |
run telnet from inetd, present login prompt if login is configured,
patch from Bastian Blank
-rw-r--r-- | include/libbb.h | 4 | ||||
-rw-r--r-- | libbb/Makefile.in | 2 | ||||
-rw-r--r-- | loginutils/getty.c | 138 | ||||
-rw-r--r-- | loginutils/login.c | 20 | ||||
-rw-r--r-- | networking/Config.in | 7 | ||||
-rw-r--r-- | networking/telnetd.c | 107 |
6 files changed, 121 insertions, 157 deletions
diff --git a/include/libbb.h b/include/libbb.h index d67bf07ec..42e89a5e9 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -277,7 +277,6 @@ extern const char * const gshadow_file; extern const char * const group_file; extern const char * const securetty_file; extern const char * const motd_file; -extern const char * const issue_file; extern const char * const _path_login; #ifdef CONFIG_FEATURE_DEVFS @@ -365,4 +364,7 @@ typedef struct llist_s { } llist_t; extern llist_t *llist_add_to(llist_t *old_head, char *new_item); +void print_login_issue(const char *issue_file, const char *tty); +void print_login_prompt(void); + #endif /* __LIBCONFIG_H__ */ diff --git a/libbb/Makefile.in b/libbb/Makefile.in index c97f7d2b3..08f8028d9 100644 --- a/libbb/Makefile.in +++ b/libbb/Makefile.in @@ -33,7 +33,7 @@ LIBBB_SRC:= \ get_last_path_component.c get_line_from_file.c herror_msg.c \ herror_msg_and_die.c human_readable.c inet_common.c inode_hash.c \ interface.c isdirectory.c kernel_version.c last_char_is.c libc5.c \ - llist_add_to.c loop.c make_directory.c mode_string.c \ + llist_add_to.c login.c loop.c make_directory.c mode_string.c \ module_syscalls.c mtab.c mtab_file.c my_getgrgid.c my_getgrnam.c \ my_getpwnam.c my_getpwnamegid.c my_getpwuid.c obscure.c parse_mode.c \ parse_number.c perror_msg.c perror_msg_and_die.c print_file.c \ diff --git a/loginutils/getty.c b/loginutils/getty.c index 0f0778caf..1b9c6ac4d 100644 --- a/loginutils/getty.c +++ b/loginutils/getty.c @@ -73,8 +73,6 @@ extern void updwtmp(const char *filename, const struct utmp *ut); #include <time.h> #endif -#define LOGIN " login: " /* login prompt */ - /* Some shorthands for control characters. */ #define CTL(x) (x ^ 0100) /* Assumes ASCII dialect */ @@ -752,142 +750,10 @@ static void auto_baud(struct termio *tp) /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */ static void do_prompt(struct options *op, struct termio *tp) { -#ifdef ISSUE - FILE *fd; - int oflag; - int c; - struct utsname uts; - - (void) uname(&uts); -#endif - - (void) write(1, "\r\n", 2); /* start a new line */ #ifdef ISSUE /* optional: show /etc/issue */ - if ((op->flags & F_ISSUE) && (fd = fopen(op->issue, "r"))) { - oflag = tp->c_oflag; /* save current setting */ - tp->c_oflag |= (ONLCR | OPOST); /* map NL in output to CR-NL */ - (void) ioctl(0, TCSETAW, tp); - - - while ((c = getc(fd)) != EOF) { - if (c == '\\') { - c = getc(fd); - - switch (c) { - case 's': - (void) printf("%s", uts.sysname); - break; - - case 'n': - (void) printf("%s", uts.nodename); - break; - - case 'r': - (void) printf("%s", uts.release); - break; - - case 'v': - (void) printf("%s", uts.version); - break; - - case 'm': - (void) printf("%s", uts.machine); - break; - - case 'o': - { - char domainname[256]; - - getdomainname(domainname, sizeof(domainname)); - domainname[sizeof(domainname) - 1] = '\0'; - printf("%s", domainname); - } - break; - - case 'd': - case 't': - { - char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu", - "Fri", "Sat" - }; - char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", - "Jun", "Jul", "Aug", "Sep", "Oct", - "Nov", "Dec" - }; - time_t now; - struct tm *tm; - - (void) time(&now); - tm = localtime(&now); - - if (c == 'd') - (void) printf("%s %s %d %d", - weekday[tm->tm_wday], - month[tm->tm_mon], tm->tm_mday, - tm->tm_year < - 70 ? tm->tm_year + - 2000 : tm->tm_year + 1900); - else - (void) printf("%02d:%02d:%02d", tm->tm_hour, - tm->tm_min, tm->tm_sec); - - break; - } - - case 'l': - (void) printf("%s", op->tty); - break; - - case 'b': - { - int i; - - for (i = 0; speedtab[i].speed; i++) { - if (speedtab[i].code == (tp->c_cflag & CBAUD)) { - printf("%ld", speedtab[i].speed); - break; - } - } - break; - } - case 'u': - case 'U': - { - int users = 0; - struct utmp *ut; - - setutent(); - while ((ut = getutent())) - if (ut->ut_type == USER_PROCESS) - users++; - endutent(); - printf("%d ", users); - if (c == 'U') - printf((users == 1) ? "user" : "users"); - break; - } - default: - (void) putchar(c); - } - } else - (void) putchar(c); - } - fflush(stdout); - - tp->c_oflag = oflag; /* restore settings */ - (void) ioctl(0, TCSETAW, tp); /* wait till output is gone */ - (void) fclose(fd); - } -#endif -#ifdef __linux__ - { - char hn[MAXHOSTNAMELEN + 1]; - - (void) gethostname(hn, MAXHOSTNAMELEN); - write(1, hn, strlen(hn)); - } + print_login_issue(op->issue, op->tty); #endif - (void) write(1, LOGIN, sizeof(LOGIN) - 1); /* always show login prompt */ + print_login_prompt(); } /* next_speed - select next baud rate */ diff --git a/loginutils/login.c b/loginutils/login.c index 4a7f13ae8..c1ea165c8 100644 --- a/loginutils/login.c +++ b/loginutils/login.c @@ -253,20 +253,18 @@ static int login_prompt ( char *buf_name ) int i; for(i=0; i<EMPTY_USERNAME_COUNT; i++) { - gethostname ( buf, sizeof( buf )); - printf ( "\n%s login: ", buf ); - fflush ( stdout ); + print_login_prompt(); + + if ( !fgets ( buf, sizeof( buf ) - 1, stdin )) + return 0; - if ( !fgets ( buf, sizeof( buf ) - 1, stdin )) - return 0; - if ( !strchr ( buf, '\n' )) - return 0; - - for ( sp = buf; isspace ( *sp ); sp++ ) { } - for ( ep = sp; isgraph ( *ep ); ep++ ) { } + return 0; + + for ( sp = buf; isspace ( *sp ); sp++ ) { } + for ( ep = sp; isgraph ( *ep ); ep++ ) { } - *ep = 0; + *ep = 0; safe_strncpy(buf_name, sp, USERNAME_SIZE); if(buf_name[0]) return 1; diff --git a/networking/Config.in b/networking/Config.in index bc1178007..ebefd600d 100644 --- a/networking/Config.in +++ b/networking/Config.in @@ -315,6 +315,13 @@ config CONFIG_TELNETD help Please submit a patch to add help text for this item. +config CONFIG_FEATURE_TELNETD_INETD + bool " Use inetd" + default n + depends on CONFIG_TELNETD + help + Please submit a patch to add help text for this item. + config CONFIG_TFTP bool "tftp" default n diff --git a/networking/telnetd.c b/networking/telnetd.c index d208319a3..d17682eb4 100644 --- a/networking/telnetd.c +++ b/networking/telnetd.c @@ -1,4 +1,4 @@ -/* $Id: telnetd.c,v 1.2 2002/11/10 22:26:19 bug1 Exp $ +/* $Id: telnetd.c,v 1.3 2003/01/21 20:55:56 bug1 Exp $ * * Simple telnet server * Bjorn Wesen, Axis Communications AB (bjornw@axis.com) @@ -48,7 +48,13 @@ #define BUFSIZE 4000 -static const char *loginpath = "/bin/sh"; +static const char *loginpath = +#ifdef CONFIG_LOGIN +"/bin/login"; +#else +"/bin/sh"; +#endif +static const char *issuefile = "/etc/issue.net"; /* shell name and arguments */ @@ -57,8 +63,12 @@ static const char *argv_init[] = {NULL, NULL}; /* structure that describes a session */ struct tsession { +#ifdef CONFIG_FEATURE_TELNETD_INETD + int sockfd_read, sockfd_write, ptyfd; +#else /* CONFIG_FEATURE_TELNETD_INETD */ struct tsession *next; int sockfd, ptyfd; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ int shell_pid; /* two circular buffers */ char *buf1, *buf2; @@ -204,7 +214,11 @@ send_iac(struct tsession *ts, unsigned char command, int option) static struct tsession * +#ifdef CONFIG_FEATURE_TELNETD_INETD +make_new_session(void) +#else /* CONFIG_FEATURE_TELNETD_INETD */ make_new_session(int sockfd) +#endif /* CONFIG_FEATURE_TELNETD_INETD */ { struct termios termbuf; int pty, pid; @@ -214,7 +228,12 @@ make_new_session(int sockfd) ts->buf1 = (char *)(&ts[1]); ts->buf2 = ts->buf1 + BUFSIZE; +#ifdef CONFIG_FEATURE_TELNETD_INETD + ts->sockfd_read = 0; + ts->sockfd_write = 1; +#else /* CONFIG_FEATURE_TELNETD_INETD */ ts->sockfd = sockfd; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ ts->rdidx1 = ts->wridx1 = ts->size1 = 0; ts->rdidx2 = ts->wridx2 = ts->size2 = 0; @@ -278,6 +297,8 @@ make_new_session(int sockfd) /*termbuf.c_lflag &= ~ICANON;*/ tcsetattr(0, TCSANOW, &termbuf); + print_login_issue(issuefile, NULL); + /* exec shell, with correct argv and env */ execv(loginpath, (char *const *)argv_init); @@ -291,6 +312,7 @@ make_new_session(int sockfd) return ts; } +#ifndef CONFIG_FEATURE_TELNETD_INETD static void free_session(struct tsession *ts) { @@ -319,30 +341,44 @@ free_session(struct tsession *ts) free(ts); } +#endif /* CONFIG_FEATURE_TELNETD_INETD */ int telnetd_main(int argc, char **argv) { +#ifndef CONFIG_FEATURE_TELNETD_INETD struct sockaddr_in sa; int master_fd; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ fd_set rdfdset, wrfdset; int selret; +#ifndef CONFIG_FEATURE_TELNETD_INETD int on = 1; int portnbr = 23; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ int c; - - /* check if user supplied a port number */ + static const char options[] = +#ifdef CONFIG_FEATURE_TELNETD_INETD + "f:l:"; +#else /* CONFIG_EATURE_TELNETD_INETD */ + "f:l:p:"; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ for (;;) { - c = getopt( argc, argv, "p:l:"); + c = getopt( argc, argv, options); if (c == EOF) break; switch (c) { - case 'p': - portnbr = atoi(optarg); + case 'f': + issuefile = strdup (optarg); break; case 'l': loginpath = strdup (optarg); break; +#ifndef CONFIG_FEATURE_TELNETD_INETD + case 'p': + portnbr = atoi(optarg); + break; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ default: show_usage(); } @@ -353,6 +389,12 @@ telnetd_main(int argc, char **argv) } argv_init[0] = loginpath; + +#ifdef CONFIG_FEATURE_TELNETD_INETD + sessions = make_new_session(); + + maxfd = 1; +#else /* CONFIG_EATURE_TELNETD_INETD */ sessions = 0; /* Grab a TCP socket. */ @@ -382,6 +424,7 @@ telnetd_main(int argc, char **argv) maxfd = master_fd; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ do { struct tsession *ts; @@ -393,10 +436,14 @@ telnetd_main(int argc, char **argv) * ptys if there is room in their respective session buffers. */ +#ifndef CONFIG_FEATURE_TELNETD_INETD FD_SET(master_fd, &rdfdset); +#endif /* CONFIG_FEATURE_TELNETD_INETD */ ts = sessions; +#ifndef CONFIG_FEATURE_TELNETD_INETD while (ts) { +#endif /* CONFIG_FEATURE_TELNETD_INETD */ /* buf1 is used from socket to pty * buf2 is used from pty to socket */ @@ -404,22 +451,33 @@ telnetd_main(int argc, char **argv) FD_SET(ts->ptyfd, &wrfdset); /* can write to pty */ } if (ts->size1 < BUFSIZE) { +#ifdef CONFIG_FEATURE_TELNETD_INETD + FD_SET(ts->sockfd_read, &rdfdset); /* can read from socket */ +#else /* CONFIG_FEATURE_TELNETD_INETD */ FD_SET(ts->sockfd, &rdfdset); /* can read from socket */ +#endif /* CONFIG_FEATURE_TELNETD_INETD */ } if (ts->size2 > 0) { +#ifdef CONFIG_FEATURE_TELNETD_INETD + FD_SET(ts->sockfd_write, &wrfdset); /* can write to socket */ +#else /* CONFIG_FEATURE_TELNETD_INETD */ FD_SET(ts->sockfd, &wrfdset); /* can write to socket */ +#endif /* CONFIG_FEATURE_TELNETD_INETD */ } if (ts->size2 < BUFSIZE) { FD_SET(ts->ptyfd, &rdfdset); /* can read from pty */ } +#ifndef CONFIG_FEATURE_TELNETD_INETD ts = ts->next; } +#endif /* CONFIG_FEATURE_TELNETD_INETD */ selret = select(maxfd + 1, &rdfdset, &wrfdset, 0, 0); if (!selret) break; +#ifndef CONFIG_FEATURE_TELNETD_INETD /* First check for and accept new sessions. */ if (FD_ISSET(master_fd, &rdfdset)) { int fd, salen; @@ -447,9 +505,12 @@ telnetd_main(int argc, char **argv) ts = sessions; while (ts) { /* For all sessions... */ +#endif /* CONFIG_FEATURE_TELNETD_INETD */ int maxlen, w, r; +#ifndef CONFIG_FEATURE_TELNETD_INETD struct tsession *next = ts->next; /* in case we free ts. */ - +#endif /* CONFIG_FEATURE_TELNETD_INETD */ + if (ts->size1 && FD_ISSET(ts->ptyfd, &wrfdset)) { int num_totty; char *ptr; @@ -459,9 +520,13 @@ telnetd_main(int argc, char **argv) w = write(ts->ptyfd, ptr, num_totty); if (w < 0) { +#ifdef CONFIG_FEATURE_TELNETD_INETD + exit(0); +#else /* CONFIG_FEATURE_TELNETD_INETD */ free_session(ts); ts = next; continue; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ } ts->wridx1 += w; ts->size1 -= w; @@ -469,31 +534,51 @@ telnetd_main(int argc, char **argv) ts->wridx1 = 0; } +#ifdef CONFIG_FEATURE_TELNETD_INETD + if (ts->size2 && FD_ISSET(ts->sockfd_write, &wrfdset)) { +#else /* CONFIG_FEATURE_TELNETD_INETD */ if (ts->size2 && FD_ISSET(ts->sockfd, &wrfdset)) { +#endif /* CONFIG_FEATURE_TELNETD_INETD */ /* Write to socket from buffer 2. */ maxlen = MIN(BUFSIZE - ts->wridx2, ts->size2); +#ifdef CONFIG_FEATURE_TELNETD_INETD + w = write(ts->sockfd_write, ts->buf2 + ts->wridx2, maxlen); + if (w < 0) + exit(0); +#else /* CONFIG_FEATURE_TELNETD_INETD */ w = write(ts->sockfd, ts->buf2 + ts->wridx2, maxlen); if (w < 0) { free_session(ts); ts = next; continue; } +#endif /* CONFIG_FEATURE_TELNETD_INETD */ ts->wridx2 += w; ts->size2 -= w; if (ts->wridx2 == BUFSIZE) ts->wridx2 = 0; } +#ifdef CONFIG_FEATURE_TELNETD_INETD + if (ts->size1 < BUFSIZE && FD_ISSET(ts->sockfd_read, &rdfdset)) { +#else /* CONFIG_FEATURE_TELNETD_INETD */ if (ts->size1 < BUFSIZE && FD_ISSET(ts->sockfd, &rdfdset)) { +#endif /* CONFIG_FEATURE_TELNETD_INETD */ /* Read from socket to buffer 1. */ maxlen = MIN(BUFSIZE - ts->rdidx1, BUFSIZE - ts->size1); +#ifdef CONFIG_FEATURE_TELNETD_INETD + r = read(ts->sockfd_read, ts->buf1 + ts->rdidx1, maxlen); + if (!r || (r < 0 && errno != EINTR)) + exit(0); +#else /* CONFIG_FEATURE_TELNETD_INETD */ r = read(ts->sockfd, ts->buf1 + ts->rdidx1, maxlen); if (!r || (r < 0 && errno != EINTR)) { free_session(ts); ts = next; continue; } +#endif /* CONFIG_FEATURE_TELNETD_INETD */ if(!*(ts->buf1 + ts->rdidx1 + r - 1)) { r--; if(!r) @@ -511,9 +596,13 @@ telnetd_main(int argc, char **argv) BUFSIZE - ts->size2); r = read(ts->ptyfd, ts->buf2 + ts->rdidx2, maxlen); if (!r || (r < 0 && errno != EINTR)) { +#ifdef CONFIG_FEATURE_TELNETD_INETD + exit(0); +#else /* CONFIG_FEATURE_TELNETD_INETD */ free_session(ts); ts = next; continue; +#endif /* CONFIG_FEATURE_TELNETD_INETD */ } ts->rdidx2 += r; ts->size2 += r; @@ -529,8 +618,10 @@ telnetd_main(int argc, char **argv) ts->rdidx2 = 0; ts->wridx2 = 0; } +#ifndef CONFIG_FEATURE_TELNETD_INETD ts = next; } +#endif /* CONFIG_FEATURE_TELNETD_INETD */ } while (1); |