44 lines
1,011 B
C
44 lines
1,011 B
C
/* See LICENSE file for copyright and license details. */
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#include "util.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
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#include <pty.h>
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#endif
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extern int ptm, pts;
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void
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getpty(void) {
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char *ptsdev;
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#if defined(_GNU_SOURCE)
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ptm = getpt();
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#elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
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ptm = posix_openpt(O_RDWR);
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#else
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ptm = open("/dev/ptmx", O_RDWR);
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if(ptm == -1)
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if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1)
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err(EXIT_FAILURE, "cannot open pty");
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#endif
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#if defined(_XOPEN_SOURCE)
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if(ptm != -1) {
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if(grantpt(ptm) == -1)
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err(EXIT_FAILURE, "cannot grant access to pty");
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if(unlockpt(ptm) == -1)
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err(EXIT_FAILURE, "cannot unlock pty");
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ptsdev = ptsname(ptm);
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if(!ptsdev)
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err(EXIT_FAILURE, "slave pty name undefined");
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pts = open(ptsdev, O_RDWR);
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if(pts == -1)
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err(EXIT_FAILURE, "cannot open slave pty");
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}
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else
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err(EXIT_FAILURE, "cannot open pty");
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#endif
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}
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