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LibC: Add posix_openpt(), grantpt() and unlockpt()

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This makes getting a pseudoterminal pair a little bit more portable.
Note that grantpt() and unlockpt() are currently no-ops, since we've
already granted the pseudoterminal slave to the calling user.

We also accept O_CLOEXEC to posix_openpt(), unlike some systems. :^)
This commit is contained in:
Andreas Kling 2020-02-05 21:17:41 +01:00
parent 6d1740e4be
commit f2a087126c
5 changed files with 58 additions and 6 deletions
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12
Applications/Terminal/main.cpp
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@ -202,9 +202,17 @@ int main(int argc, char** argv)
if (chdir(get_current_user_home_path().characters()) < 0)
perror("chdir");
int ptm_fd = open("/dev/ptmx", O_RDWR | O_CLOEXEC);
int ptm_fd = posix_openpt(O_RDWR | O_CLOEXEC);
if (ptm_fd < 0) {
perror("open(ptmx)");
perror("posix_openpt");
return 1;
}
if (grantpt(ptm_fd) < 0) {
perror("grantpt");
return 1;
}
if (unlockpt(ptm_fd) < 0) {
perror("unlockpt");
return 1;
}