20 lines
519 B
C
20 lines
519 B
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <string.h>
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#include <unistd.h>
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pid_t getppid(void)
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{
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message m;
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memset(&m, 0, sizeof(m));
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/* POSIX says that this function is always successful and that no
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* return value is reserved to indicate an error. Minix syscalls
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* are not always successful and Minix returns the reserved value
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* (pid_t) -1 when there is an error.
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*/
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if (_syscall(PM_PROC_NR, PM_GETPID, &m) < 0) return(-1);
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return(m.m_pm_lc_getpid.parent_pid);
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}
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