| brk.2 (9665) | brk.2 (14855) |
|---|---|
| 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 80 unchanged lines hidden (view full) --- 89system call may be used to determine 90the maximum permissible size of the 91.Em data 92segment; 93it will not be possible to set the break 94beyond the 95.Em rlim_max 96value returned from a call to | 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 80 unchanged lines hidden (view full) --- 89system call may be used to determine 90the maximum permissible size of the 91.Em data 92segment; 93it will not be possible to set the break 94beyond the 95.Em rlim_max 96value returned from a call to |
| 97.Xr getrlimit , | 97.Xr getrlimit 2 , |
| 98e.g. 99.Dq qetext + rlp\(->rlim_max. 100(see 101.Xr end 3 102for the definition of 103.Em etext ) . 104.Sh RETURN VALUES 105.Nm Brk 106returns 0 if successful; 107otherwise -1 with 108.Va errno 109set to indicate why the allocation failed. 110The 111.Nm sbrk 112returns a pointer to the base of the new storage if successful; 113otherwise -1 with 114.Va errno 115set to indicate why the allocation failed. 116.Sh ERRORS | 98e.g. 99.Dq qetext + rlp\(->rlim_max. 100(see 101.Xr end 3 102for the definition of 103.Em etext ) . 104.Sh RETURN VALUES 105.Nm Brk 106returns 0 if successful; 107otherwise -1 with 108.Va errno 109set to indicate why the allocation failed. 110The 111.Nm sbrk 112returns a pointer to the base of the new storage if successful; 113otherwise -1 with 114.Va errno 115set to indicate why the allocation failed. 116.Sh ERRORS |
| 117.Xr Sbrk | 117.Fn Sbrk |
| 118will fail and no additional memory will be allocated if 119one of the following are true: 120.Bl -tag -width [ENOMEM] 121.It Bq Er ENOMEM 122The limit, as set by 123.Xr setrlimit 2 , 124was exceeded. 125.It Bq Er ENOMEM --- 8 unchanged lines hidden (view full) --- 134.Xr getrlimit 2 , 135.Xr malloc 3 , 136.Xr end 3 137.Sh BUGS 138Setting the break may fail due to a temporary lack of 139swap space. It is not possible to distinguish this 140from a failure caused by exceeding the maximum size of 141the data segment without consulting | 118will fail and no additional memory will be allocated if 119one of the following are true: 120.Bl -tag -width [ENOMEM] 121.It Bq Er ENOMEM 122The limit, as set by 123.Xr setrlimit 2 , 124was exceeded. 125.It Bq Er ENOMEM --- 8 unchanged lines hidden (view full) --- 134.Xr getrlimit 2 , 135.Xr malloc 3 , 136.Xr end 3 137.Sh BUGS 138Setting the break may fail due to a temporary lack of 139swap space. It is not possible to distinguish this 140from a failure caused by exceeding the maximum size of 141the data segment without consulting |
| 142.Xr getrlimit . | 142.Xr getrlimit 2 . |
| 143.Sh HISTORY 144A 145.Nm 146function call appeared in Version 7 AT&T UNIX. | 143.Sh HISTORY 144A 145.Nm 146function call appeared in Version 7 AT&T UNIX. |