version 1.8.2.2, 2004/03/04 18:18:17 |
version 1.9, 2003/05/24 09:30:40 |
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int |
int |
pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) |
pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) |
{ |
{ |
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#if defined(HAVE_OPENPTY) || defined(BSD4_4) |
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/* openpty(3) exists in OSF/1 and some other os'es */ |
char buf[64]; |
char buf[64]; |
int i; |
int i; |
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} |
} |
strlcpy(namebuf, buf, namebuflen); /* possible truncation */ |
strlcpy(namebuf, buf, namebuflen); /* possible truncation */ |
return 1; |
return 1; |
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#else /* HAVE_OPENPTY */ |
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#ifdef HAVE__GETPTY |
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/* |
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* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more |
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* pty's automagically when needed |
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*/ |
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char *slave; |
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slave = _getpty(ptyfd, O_RDWR, 0622, 0); |
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if (slave == NULL) { |
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error("_getpty: %.100s", strerror(errno)); |
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return 0; |
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} |
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strlcpy(namebuf, slave, namebuflen); |
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/* Open the slave side. */ |
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*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
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if (*ttyfd < 0) { |
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error("%.200s: %.100s", namebuf, strerror(errno)); |
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close(*ptyfd); |
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return 0; |
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} |
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return 1; |
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#else /* HAVE__GETPTY */ |
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#ifdef HAVE_DEV_PTMX |
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/* |
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* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3 |
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* also has bsd-style ptys, but they simply do not work.) |
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*/ |
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int ptm; |
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char *pts; |
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ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY); |
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if (ptm < 0) { |
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error("/dev/ptmx: %.100s", strerror(errno)); |
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return 0; |
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} |
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if (grantpt(ptm) < 0) { |
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error("grantpt: %.100s", strerror(errno)); |
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return 0; |
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} |
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if (unlockpt(ptm) < 0) { |
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error("unlockpt: %.100s", strerror(errno)); |
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return 0; |
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} |
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pts = ptsname(ptm); |
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if (pts == NULL) |
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error("Slave pty side name could not be obtained."); |
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strlcpy(namebuf, pts, namebuflen); |
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*ptyfd = ptm; |
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/* Open the slave side. */ |
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*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
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if (*ttyfd < 0) { |
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error("%.100s: %.100s", namebuf, strerror(errno)); |
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close(*ptyfd); |
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return 0; |
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} |
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/* Push the appropriate streams modules, as described in Solaris pts(7). */ |
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if (ioctl(*ttyfd, I_PUSH, "ptem") < 0) |
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error("ioctl I_PUSH ptem: %.100s", strerror(errno)); |
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if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0) |
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error("ioctl I_PUSH ldterm: %.100s", strerror(errno)); |
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if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0) |
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error("ioctl I_PUSH ttcompat: %.100s", strerror(errno)); |
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return 1; |
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#else /* HAVE_DEV_PTMX */ |
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#ifdef HAVE_DEV_PTS_AND_PTC |
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/* AIX-style pty code. */ |
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const char *name; |
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*ptyfd = open("/dev/ptc", O_RDWR | O_NOCTTY); |
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if (*ptyfd < 0) { |
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error("Could not open /dev/ptc: %.100s", strerror(errno)); |
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return 0; |
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} |
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name = ttyname(*ptyfd); |
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if (!name) |
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fatal("Open of /dev/ptc returns device for which ttyname fails."); |
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strlcpy(namebuf, name, namebuflen); |
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*ttyfd = open(name, O_RDWR | O_NOCTTY); |
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if (*ttyfd < 0) { |
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error("Could not open pty slave side %.100s: %.100s", |
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name, strerror(errno)); |
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close(*ptyfd); |
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return 0; |
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} |
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return 1; |
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#else /* HAVE_DEV_PTS_AND_PTC */ |
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/* BSD-style pty code. */ |
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char buf[64]; |
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int i; |
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const char *ptymajors = "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
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const char *ptyminors = "0123456789abcdef"; |
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int num_minors = strlen(ptyminors); |
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int num_ptys = strlen(ptymajors) * num_minors; |
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for (i = 0; i < num_ptys; i++) { |
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snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors], |
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ptyminors[i % num_minors]); |
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*ptyfd = open(buf, O_RDWR | O_NOCTTY); |
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if (*ptyfd < 0) |
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continue; |
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snprintf(namebuf, namebuflen, "/dev/tty%c%c", |
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ptymajors[i / num_minors], ptyminors[i % num_minors]); |
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/* Open the slave side. */ |
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*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
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if (*ttyfd < 0) { |
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error("%.100s: %.100s", namebuf, strerror(errno)); |
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close(*ptyfd); |
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return 0; |
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} |
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return 1; |
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} |
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return 0; |
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#endif /* HAVE_DEV_PTS_AND_PTC */ |
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#endif /* HAVE_DEV_PTMX */ |
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#endif /* HAVE__GETPTY */ |
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#endif /* HAVE_OPENPTY */ |
} |
} |
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/* Releases the tty. Its ownership is returned to root, and permissions to 0666. */ |
/* Releases the tty. Its ownership is returned to root, and permissions to 0666. */ |
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error("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno)); |
error("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno)); |
} |
} |
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/* Makes the tty the process's controlling tty and sets it to sane modes. */ |
/* Makes the tty the processes controlling tty and sets it to sane modes. */ |
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void |
void |
pty_make_controlling_tty(int *ttyfd, const char *ttyname) |
pty_make_controlling_tty(int *ttyfd, const char *ttyname) |