4.104.114.84.95
Last change
on this file since 70810dc was
e4b25c4,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/30/99 at 13:46:28
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Corrected so they would compile with POSIX disabled.
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-
Property mode set to
100644
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File size:
1.4 KB
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Line | |
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1 | /* |
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2 | * ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name |
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3 | * |
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4 | * $Id$ |
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5 | */ |
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6 | |
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7 | #include <sys/types.h> |
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8 | #include <sys/stat.h> |
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9 | #include <fcntl.h> |
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10 | #include <dirent.h> |
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11 | #include <termios.h> |
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12 | #include <unistd.h> |
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13 | #include <paths.h> |
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14 | #include <_syslist.h> |
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15 | #include <errno.h> |
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16 | |
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17 | #include "libio_.h" |
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18 | |
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19 | |
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20 | int ttyname_r( |
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21 | int fd, |
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22 | char *name, |
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23 | int namesize |
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24 | ) |
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25 | { |
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26 | struct stat sb; |
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27 | struct termios tty; |
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28 | struct dirent *dirp; |
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29 | DIR *dp; |
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30 | struct stat dsb; |
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31 | char *rval; |
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32 | |
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33 | /* Must be a terminal. */ |
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34 | if (tcgetattr (fd, &tty) < 0) |
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35 | set_errno_and_return_minus_one(EBADF); |
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36 | |
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37 | /* Must be a character device. */ |
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38 | if (_fstat (fd, &sb) || !S_ISCHR (sb.st_mode)) |
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39 | set_errno_and_return_minus_one(EBADF); |
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40 | |
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41 | if ((dp = opendir (_PATH_DEV)) == NULL) |
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42 | set_errno_and_return_minus_one(EBADF); |
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43 | |
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44 | for (rval = NULL; (dirp = readdir (dp)) != NULL ;) |
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45 | { |
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46 | if (dirp->d_ino != sb.st_ino) |
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47 | continue; |
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48 | strcpy (name + sizeof (_PATH_DEV) - 1, dirp->d_name); |
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49 | if (stat (name, &dsb) || sb.st_dev != dsb.st_dev || |
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50 | sb.st_ino != dsb.st_ino) |
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51 | continue; |
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52 | (void) closedir (dp); |
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53 | rval = name; |
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54 | break; |
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55 | } |
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56 | (void) closedir (dp); |
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57 | return 0; |
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58 | } |
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59 | |
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60 | static char buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV; |
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61 | |
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62 | /* |
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63 | * ttyname() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name |
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64 | */ |
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65 | |
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66 | char *ttyname( |
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67 | int fd |
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68 | ) |
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69 | { |
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70 | if ( !ttyname_r( fd, buf, sizeof(buf) ) ) |
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71 | return buf; |
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72 | return NULL; |
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73 | } |
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74 | |
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