version 1.10, 2003/06/12 07:57:38 |
version 1.10.2.2, 2004/08/19 22:37:33 |
|
|
int |
int |
pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) |
pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) |
{ |
{ |
#if defined(HAVE_OPENPTY) || defined(BSD4_4) |
|
/* openpty(3) exists in OSF/1 and some other os'es */ |
|
char buf[64]; |
char buf[64]; |
int i; |
int i; |
|
|
|
|
} |
} |
strlcpy(namebuf, buf, namebuflen); /* possible truncation */ |
strlcpy(namebuf, buf, namebuflen); /* possible truncation */ |
return 1; |
return 1; |
#else /* HAVE_OPENPTY */ |
|
#ifdef HAVE__GETPTY |
|
/* |
|
* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more |
|
* pty's automagically when needed |
|
*/ |
|
char *slave; |
|
|
|
slave = _getpty(ptyfd, O_RDWR, 0622, 0); |
|
if (slave == NULL) { |
|
error("_getpty: %.100s", strerror(errno)); |
|
return 0; |
|
} |
|
strlcpy(namebuf, slave, namebuflen); |
|
/* Open the slave side. */ |
|
*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
|
if (*ttyfd < 0) { |
|
error("%.200s: %.100s", namebuf, strerror(errno)); |
|
close(*ptyfd); |
|
return 0; |
|
} |
|
return 1; |
|
#else /* HAVE__GETPTY */ |
|
#ifdef HAVE_DEV_PTMX |
|
/* |
|
* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3 |
|
* also has bsd-style ptys, but they simply do not work.) |
|
*/ |
|
int ptm; |
|
char *pts; |
|
|
|
ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY); |
|
if (ptm < 0) { |
|
error("/dev/ptmx: %.100s", strerror(errno)); |
|
return 0; |
|
} |
|
if (grantpt(ptm) < 0) { |
|
error("grantpt: %.100s", strerror(errno)); |
|
return 0; |
|
} |
|
if (unlockpt(ptm) < 0) { |
|
error("unlockpt: %.100s", strerror(errno)); |
|
return 0; |
|
} |
|
pts = ptsname(ptm); |
|
if (pts == NULL) |
|
error("Slave pty side name could not be obtained."); |
|
strlcpy(namebuf, pts, namebuflen); |
|
*ptyfd = ptm; |
|
|
|
/* Open the slave side. */ |
|
*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
|
if (*ttyfd < 0) { |
|
error("%.100s: %.100s", namebuf, strerror(errno)); |
|
close(*ptyfd); |
|
return 0; |
|
} |
|
/* Push the appropriate streams modules, as described in Solaris pts(7). */ |
|
if (ioctl(*ttyfd, I_PUSH, "ptem") < 0) |
|
error("ioctl I_PUSH ptem: %.100s", strerror(errno)); |
|
if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0) |
|
error("ioctl I_PUSH ldterm: %.100s", strerror(errno)); |
|
if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0) |
|
error("ioctl I_PUSH ttcompat: %.100s", strerror(errno)); |
|
return 1; |
|
#else /* HAVE_DEV_PTMX */ |
|
#ifdef HAVE_DEV_PTS_AND_PTC |
|
/* AIX-style pty code. */ |
|
const char *name; |
|
|
|
*ptyfd = open("/dev/ptc", O_RDWR | O_NOCTTY); |
|
if (*ptyfd < 0) { |
|
error("Could not open /dev/ptc: %.100s", strerror(errno)); |
|
return 0; |
|
} |
|
name = ttyname(*ptyfd); |
|
if (!name) |
|
fatal("Open of /dev/ptc returns device for which ttyname fails."); |
|
strlcpy(namebuf, name, namebuflen); |
|
*ttyfd = open(name, O_RDWR | O_NOCTTY); |
|
if (*ttyfd < 0) { |
|
error("Could not open pty slave side %.100s: %.100s", |
|
name, strerror(errno)); |
|
close(*ptyfd); |
|
return 0; |
|
} |
|
return 1; |
|
#else /* HAVE_DEV_PTS_AND_PTC */ |
|
/* BSD-style pty code. */ |
|
char buf[64]; |
|
int i; |
|
const char *ptymajors = "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
|
const char *ptyminors = "0123456789abcdef"; |
|
int num_minors = strlen(ptyminors); |
|
int num_ptys = strlen(ptymajors) * num_minors; |
|
|
|
for (i = 0; i < num_ptys; i++) { |
|
snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors], |
|
ptyminors[i % num_minors]); |
|
*ptyfd = open(buf, O_RDWR | O_NOCTTY); |
|
if (*ptyfd < 0) |
|
continue; |
|
snprintf(namebuf, namebuflen, "/dev/tty%c%c", |
|
ptymajors[i / num_minors], ptyminors[i % num_minors]); |
|
|
|
/* Open the slave side. */ |
|
*ttyfd = open(namebuf, O_RDWR | O_NOCTTY); |
|
if (*ttyfd < 0) { |
|
error("%.100s: %.100s", namebuf, strerror(errno)); |
|
close(*ptyfd); |
|
return 0; |
|
} |
|
return 1; |
|
} |
|
return 0; |
|
#endif /* HAVE_DEV_PTS_AND_PTC */ |
|
#endif /* HAVE_DEV_PTMX */ |
|
#endif /* HAVE__GETPTY */ |
|
#endif /* HAVE_OPENPTY */ |
|
} |
} |
|
|
/* 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. */ |
|
|
void |
void |
pty_release(const char *ttyname) |
pty_release(const char *tty) |
{ |
{ |
if (chown(ttyname, (uid_t) 0, (gid_t) 0) < 0) |
if (chown(tty, (uid_t) 0, (gid_t) 0) < 0) |
error("chown %.100s 0 0 failed: %.100s", ttyname, strerror(errno)); |
error("chown %.100s 0 0 failed: %.100s", tty, strerror(errno)); |
if (chmod(ttyname, (mode_t) 0666) < 0) |
if (chmod(tty, (mode_t) 0666) < 0) |
error("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno)); |
error("chmod %.100s 0666 failed: %.100s", tty, strerror(errno)); |
} |
} |
|
|
/* Makes the tty the process's controlling tty and sets it to sane modes. */ |
/* Makes the tty the process's controlling tty and sets it to sane modes. */ |
|
|
void |
void |
pty_make_controlling_tty(int *ttyfd, const char *ttyname) |
pty_make_controlling_tty(int *ttyfd, const char *tty) |
{ |
{ |
int fd; |
int fd; |
|
|
|
|
if (ioctl(*ttyfd, TIOCSCTTY, NULL) < 0) |
if (ioctl(*ttyfd, TIOCSCTTY, NULL) < 0) |
error("ioctl(TIOCSCTTY): %.100s", strerror(errno)); |
error("ioctl(TIOCSCTTY): %.100s", strerror(errno)); |
#endif /* TIOCSCTTY */ |
#endif /* TIOCSCTTY */ |
fd = open(ttyname, O_RDWR); |
fd = open(tty, O_RDWR); |
if (fd < 0) |
if (fd < 0) |
error("%.100s: %.100s", ttyname, strerror(errno)); |
error("%.100s: %.100s", tty, strerror(errno)); |
else |
else |
close(fd); |
close(fd); |
|
|
|
|
} |
} |
|
|
void |
void |
pty_setowner(struct passwd *pw, const char *ttyname) |
pty_setowner(struct passwd *pw, const char *tty) |
{ |
{ |
struct group *grp; |
struct group *grp; |
gid_t gid; |
gid_t gid; |
|
|
* Warn but continue if filesystem is read-only and the uids match/ |
* Warn but continue if filesystem is read-only and the uids match/ |
* tty is owned by root. |
* tty is owned by root. |
*/ |
*/ |
if (stat(ttyname, &st)) |
if (stat(tty, &st)) |
fatal("stat(%.100s) failed: %.100s", ttyname, |
fatal("stat(%.100s) failed: %.100s", tty, |
strerror(errno)); |
strerror(errno)); |
|
|
if (st.st_uid != pw->pw_uid || st.st_gid != gid) { |
if (st.st_uid != pw->pw_uid || st.st_gid != gid) { |
if (chown(ttyname, pw->pw_uid, gid) < 0) { |
if (chown(tty, pw->pw_uid, gid) < 0) { |
if (errno == EROFS && |
if (errno == EROFS && |
(st.st_uid == pw->pw_uid || st.st_uid == 0)) |
(st.st_uid == pw->pw_uid || st.st_uid == 0)) |
debug("chown(%.100s, %u, %u) failed: %.100s", |
debug("chown(%.100s, %u, %u) failed: %.100s", |
ttyname, (u_int)pw->pw_uid, (u_int)gid, |
tty, (u_int)pw->pw_uid, (u_int)gid, |
strerror(errno)); |
strerror(errno)); |
else |
else |
fatal("chown(%.100s, %u, %u) failed: %.100s", |
fatal("chown(%.100s, %u, %u) failed: %.100s", |
ttyname, (u_int)pw->pw_uid, (u_int)gid, |
tty, (u_int)pw->pw_uid, (u_int)gid, |
strerror(errno)); |
strerror(errno)); |
} |
} |
} |
} |
|
|
if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode) { |
if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode) { |
if (chmod(ttyname, mode) < 0) { |
if (chmod(tty, mode) < 0) { |
if (errno == EROFS && |
if (errno == EROFS && |
(st.st_mode & (S_IRGRP | S_IROTH)) == 0) |
(st.st_mode & (S_IRGRP | S_IROTH)) == 0) |
debug("chmod(%.100s, 0%o) failed: %.100s", |
debug("chmod(%.100s, 0%o) failed: %.100s", |
ttyname, (u_int)mode, strerror(errno)); |
tty, (u_int)mode, strerror(errno)); |
else |
else |
fatal("chmod(%.100s, 0%o) failed: %.100s", |
fatal("chmod(%.100s, 0%o) failed: %.100s", |
ttyname, (u_int)mode, strerror(errno)); |
tty, (u_int)mode, strerror(errno)); |
} |
} |
} |
} |
} |
} |