diff options
Diffstat (limited to 'loginutils')
| -rw-r--r-- | loginutils/getty.c | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/loginutils/getty.c b/loginutils/getty.c index d123d49..9648a17 100644 --- a/loginutils/getty.c +++ b/loginutils/getty.c @@ -25,13 +25,14 @@ #include <fcntl.h> #include <stdarg.h> #include <ctype.h> -#ifdef CONFIG_FEATURE_UTMP -#include <utmp.h> -#endif #include <getopt.h> #include <termios.h> #include "busybox.h" +#ifdef CONFIG_FEATURE_UTMP +#include <utmp.h> +#endif + #define _PATH_LOGIN "/bin/login" /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */ @@ -153,7 +154,7 @@ struct options { /* Storage for things detected while the login name was read. */ -static struct chardata { +struct chardata { int erase; /* erase character */ int kill; /* kill character */ int eol; /* end-of-line character */ @@ -233,9 +234,11 @@ static int caps_lock(const char *s); static int bcode(char *s); static void error(const char *fmt, ...) __attribute__ ((noreturn)); +#ifdef SYSV_STYLE #ifdef CONFIG_FEATURE_UTMP static void update_utmp(char *line); #endif +#endif /* The following is used for understandable diagnostics. */ @@ -552,16 +555,11 @@ static void update_utmp(char *line) /* open_tty - set up tty as standard { input, output, error } */ static void open_tty(char *tty, struct termio *tp, int local) { - /* Get rid of the present standard { output, error} if any. */ - - (void) close(1); - (void) close(2); - errno = 0; /* ignore above errors */ - /* Set up new standard input, unless we are given an already opened port. */ if (strcmp(tty, "-")) { struct stat st; + int fd; /* Sanity checks... */ @@ -574,12 +572,11 @@ static void open_tty(char *tty, struct termio *tp, int local) /* Open the tty as standard input. */ - (void) close(0); - errno = 0; /* ignore close(2) errors */ - debug("open(2)\n"); - if (open(tty, O_RDWR | O_NONBLOCK, 0) != 0) + fd = open(tty, O_RDWR | O_NONBLOCK, 0); + if (dup2(fd, STDIN_FILENO) == -1) error("/dev/%s: cannot open as standard input: %m", tty); + close(fd); } else { @@ -592,9 +589,10 @@ static void open_tty(char *tty, struct termio *tp, int local) error("%s: not open for read/write", tty); } - /* Set up standard output and standard error file descriptors. */ + /* Replace current standard output/error fd's with new ones */ debug("duping\n"); - if (dup(0) != 1 || dup(0) != 2) /* set up stdout and stderr */ + if (dup2(STDIN_FILENO, STDOUT_FILENO) == -1 || + dup2(STDIN_FILENO, STDERR_FILENO) == -1) error("%s: dup problem: %m", tty); /* we have a problem */ /* |