48f20655ac
- new call names, message field aliases, call tables; - initialize all ABI request messages to zero; - format callnr.h in the same way as com.h; - remove param.h namespace pollution in servers; - make brk(2) go to VM directly, rather than through PM; - remove obsolete WAIT and BRK calls from PM; - remove obsolete UTIME call from VFS; - clean up path copying routine in VFS; - move system calls from libminlib to libc; - correct some errno-related mistakes in libc routines; Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
25 lines
589 B
C
25 lines
589 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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#ifdef __weak_alias
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__weak_alias(getppid, _getppid)
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#endif
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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 ( (pid_t) -1);
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return( (pid_t) m.PM_GETPID_PARENT);
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}
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