| popen.3 (32eef9aeb1f39a1623cea55da147c89abbd5b9a5) | popen.3 (c0595bfc20bc580b80ce3f084f638808ca4dc044) |
|---|---|
| 1.\" Copyright (c) 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. --- 170 unchanged lines hidden (view full) --- 179.Pp 180Failure to execute the shell 181is indistinguishable from the shell's failure to execute command, 182or an immediate exit of the command. 183The only hint is an exit status of 127. 184.Pp 185The 186.Fn popen | 1.\" Copyright (c) 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. --- 170 unchanged lines hidden (view full) --- 179.Pp 180Failure to execute the shell 181is indistinguishable from the shell's failure to execute command, 182or an immediate exit of the command. 183The only hint is an exit status of 127. 184.Pp 185The 186.Fn popen |
| 187argument | 187function |
| 188always calls 189.Xr sh 1 , 190never calls 191.Xr csh 1 . 192.Sh HISTORY 193A 194.Fn popen 195and a 196.Fn pclose 197function appeared in 198.At v7 . 199.Pp 200Bidirectional functionality was added in 201.Fx 2.2.6 . | 188always calls 189.Xr sh 1 , 190never calls 191.Xr csh 1 . 192.Sh HISTORY 193A 194.Fn popen 195and a 196.Fn pclose 197function appeared in 198.At v7 . 199.Pp 200Bidirectional functionality was added in 201.Fx 2.2.6 . |