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getty: cleanup part 1
This commit is contained in:
Denis Vlasenko
parent
7c4503d223
commit
dce3fde414
@ -50,7 +50,7 @@ extern void updwtmp(const char *filename, const struct utmp *ut);
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* and for line editing at the same time.
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*/
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#ifdef SYSV_STYLE
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#ifdef SYSV_STYLE
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#include <sys/utsname.h>
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#include <time.h>
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#endif
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@ -147,7 +147,7 @@ struct chardata {
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/* Initial values for the above. */
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static struct chardata init_chardata = {
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static const struct chardata init_chardata = {
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DEF_ERASE, /* default erase character */
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DEF_KILL, /* default kill character */
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13, /* default eol char */
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@ -161,7 +161,7 @@ struct Speedtab {
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int code;
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};
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static struct Speedtab speedtab[] = {
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static const struct Speedtab speedtab[] = {
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{50, B50},
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{75, B75},
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{110, B110},
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@ -201,7 +201,7 @@ static struct Speedtab speedtab[] = {
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#endif
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#ifdef SYSV_STYLE
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#ifdef SYSV_STYLE
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#ifdef CONFIG_FEATURE_UTMP
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static void update_utmp(char *line);
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#endif
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@ -262,7 +262,7 @@ static void parse_args(int argc, char **argv, struct options *op)
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op->flags = getopt32(argc, argv, opt_string,
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&(op->initstring), &fakehost, &(op->issue),
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&(op->login), &ts);
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if(op->flags & F_INITSTRING) {
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if (op->flags & F_INITSTRING) {
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const char *p = op->initstring;
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char *q;
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@ -280,33 +280,34 @@ static void parse_args(int argc, char **argv, struct options *op)
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*q = '\0';
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}
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op->flags ^= F_ISSUE; /* revert flag show /etc/issue */
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if(op->flags & F_TIMEOUT) {
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if (op->flags & F_TIMEOUT) {
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op->timeout = xatoul_range(ts, 1, INT_MAX);
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}
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argv += optind;
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argc -= optind;
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debug("after getopt loop\n");
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if (argc < optind + 2) /* check parameter count */
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if (argc < 2) /* check parameter count */
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bb_show_usage();
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/* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
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if ('0' <= argv[optind][0] && argv[optind][0] <= '9') {
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if ('0' <= argv[0][0] && argv[0][0] <= '9') {
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/* a number first, assume it's a speed (BSD style) */
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parse_speeds(op, argv[optind++]); /* baud rate(s) */
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op->tty = argv[optind]; /* tty name */
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parse_speeds(op, argv[0]); /* baud rate(s) */
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op->tty = argv[1]; /* tty name */
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} else {
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op->tty = argv[optind++]; /* tty name */
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parse_speeds(op, argv[optind]); /* baud rate(s) */
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op->tty = argv[0]; /* tty name */
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parse_speeds(op, argv[1]); /* baud rate(s) */
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}
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optind++;
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if (argc > optind && argv[optind])
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setenv("TERM", argv[optind], 1);
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if (argc > 2 && argv[2])
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setenv("TERM", argv[2], 1);
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debug("exiting parseargs\n");
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}
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static void xdup2(int srcfd, int dstfd, const char *tty)
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{
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if(dup2(srcfd, dstfd) == -1)
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if (dup2(srcfd, dstfd) == -1)
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bb_perror_msg_and_die("%s: dup", tty);
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}
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@ -333,7 +334,7 @@ static void open_tty(char *tty, struct termio *tp, int local)
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debug("open(2)\n");
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fd = xopen(tty, O_RDWR | O_NONBLOCK);
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if(fd) {
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if (fd) {
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xdup2(fd, 0, tty);
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close(fd);
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}
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@ -372,12 +373,14 @@ static void open_tty(char *tty, struct termio *tp, int local)
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*/
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#ifdef DEBIAN
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#warning Debian /dev/vcs[a]NN hack is deprecated and will be removed
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{
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/* tty to root.dialout 660 */
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struct group *gr;
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int id;
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id = (gr = getgrnam("dialout")) ? gr->gr_gid : 0;
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gr = getgrnam("dialout");
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id = gr ? gr->gr_gid : 0;
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chown(tty, 0, id);
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chmod(tty, 0660);
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@ -491,7 +494,8 @@ static void auto_baud(struct termio *tp)
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*/
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(void) sleep(1);
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if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) {
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nread = read(0, buf, sizeof(buf) - 1);
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if (nread > 0) {
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buf[nread] = '\0';
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for (bp = buf; bp < buf + nread; bp++) {
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if (isascii(*bp) && isdigit(*bp)) {
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@ -536,15 +540,10 @@ static void do_prompt(struct options *op, struct termio *tp)
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/* returns 1 if true, 0 if false */
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static int caps_lock(const char *s)
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{
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int capslock;
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for (capslock = 0; *s; s++) {
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if (islower(*s))
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return (0);
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if (capslock == 0)
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capslock = isupper(*s);
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}
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return (capslock);
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while (*s)
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if (islower(*s++))
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return 0;
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return 1;
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}
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#define logname bb_common_bufsiz1
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@ -557,7 +556,7 @@ static char *get_logname(struct options *op, struct chardata *cp, struct termio
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char ascval; /* low 7 bits of input character */
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int bits; /* # of "1" bits per character */
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int mask; /* mask with 1 bit up */
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static char *erase[] = { /* backspace-space-backspace */
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static const char *const erase[] = { /* backspace-space-backspace */
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"\010\040\010", /* space parity */
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"\010\040\010", /* odd parity */
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"\210\240\210", /* even parity */
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@ -575,7 +574,8 @@ static char *get_logname(struct options *op, struct chardata *cp, struct termio
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/* Prompt for and read a login name. */
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for (*logname = 0; *logname == 0; /* void */ ) {
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*logname = 0;
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while (*logname) {
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/* Write issue file and prompt, with "parity" bit == 0. */
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@ -583,7 +583,9 @@ static char *get_logname(struct options *op, struct chardata *cp, struct termio
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/* Read name, watch for break, parity, erase, kill, end-of-line. */
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for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) {
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bp = logname;
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cp->eol = 0;
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while (cp->eol == 0) {
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/* Do not report trivial EINTR/EIO errors. */
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@ -594,13 +596,13 @@ static char *get_logname(struct options *op, struct chardata *cp, struct termio
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}
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/* Do BREAK handling elsewhere. */
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if ((c == 0) && op->numspeed > 1)
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/* return (0); */
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if (c == 0 && op->numspeed > 1)
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return NULL;
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/* Do parity bit handling. */
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if (c != (ascval = (c & 0177))) { /* "parity" bit on ? */
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ascval = c & 0177;
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if (c != ascval) { /* "parity" bit on ? */
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for (bits = 1, mask = 1; mask & 0177; mask <<= 1)
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if (mask & ascval)
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bits++; /* count "1" bits */
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@ -648,12 +650,13 @@ static char *get_logname(struct options *op, struct chardata *cp, struct termio
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}
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/* Handle names with upper case and no lower case. */
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if ((cp->capslock = caps_lock(logname))) {
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cp->capslock = caps_lock(logname);
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if (cp->capslock) {
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for (bp = logname; *bp; bp++)
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if (isupper(*bp))
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*bp = tolower(*bp); /* map name to lower case */
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}
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return (logname);
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return logname;
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}
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/* termio_final - set the final tty mode bits */
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@ -746,8 +749,8 @@ static void update_utmp(char *line)
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utmpname(_PATH_UTMP);
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setutent();
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while ((utp = getutent())
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&& !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid)) /* nothing */
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;
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&& !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid))
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/* nothing */;
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if (utp) {
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memcpy(&ut, utp, sizeof(ut));
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@ -756,7 +759,7 @@ static void update_utmp(char *line)
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memset(&ut, 0, sizeof(ut));
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safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
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}
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/*endutent(); */
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/* endutent(); */
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strcpy(ut.ut_user, "LOGIN");
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safe_strncpy(ut.ut_line, line, sizeof(ut.ut_line));
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@ -808,20 +811,21 @@ int getty_main(int argc, char **argv)
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close(0);
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close(1);
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close(2);
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logmode = LOGMODE_NONE;
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#ifdef __linux__
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setsid();
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#endif
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/* We want special flavor of error_msg_and_die */
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die_sleep = 10;
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msg_eol = "\r\n";
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/* Was "/dev/console". Why should we spam *system console*
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* if there is a problem with getty on /dev/ttyS15?... */
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nullfd = xopen(bb_dev_null, O_RDWR);
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dup2(nullfd, 0);
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dup2(nullfd, 1);
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dup2(nullfd, 2);
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if(nullfd > 2)
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if (nullfd > 2)
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close(nullfd);
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/* We want special flavor of error_msg_and_die */
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die_sleep = 10;
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msg_eol = "\r\n";
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openlog(applet_name, LOG_PID, LOG_AUTH);
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logmode = LOGMODE_BOTH;
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@ -927,4 +931,3 @@ int getty_main(int argc, char **argv)
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(void) execl(options.login, options.login, "--", logname, (char *) 0);
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bb_error_msg_and_die("%s: can't exec %s", options.tty, options.login);
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}
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