48 lines
904 B
C
48 lines
904 B
C
#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "ourhdr.h"
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extern char *ptsname(int); /* prototype not in any system header */
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int
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ptym_open(char *pts_name)
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{
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char *ptr;
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int fdm;
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strcpy(pts_name, "/dev/ptmx"); /* in case open fails */
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if ( (fdm = open(pts_name, O_RDWR)) < 0)
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return(-1);
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if (grantpt(fdm) < 0) { /* grant access to slave */
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close(fdm);
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return(-2);
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}
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if (unlockpt(fdm) < 0) { /* clear slave's lock flag */
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close(fdm);
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return(-3);
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}
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if ( (ptr = ptsname(fdm)) == NULL) { /* get slave's name */
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close(fdm);
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return(-4);
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}
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strcpy(pts_name, ptr); /* return name of slave */
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return(fdm); /* return fd of master */
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}
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int
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ptys_open(int fdm, char *pts_name)
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{
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int fds;
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/* following should allocate controlling terminal */
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if ( (fds = open(pts_name, O_RDWR)) < 0) {
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close(fdm);
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return(-5);
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}
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return(fds);
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}
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