projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| 2 | .\" | |
| 3 | .\" Permission is granted to make and distribute verbatim copies of this | |
| 4 | .\" manual provided the copyright notice and this permission notice are | |
| 5 | .\" preserved on all copies. | |
| 6 | .\" | |
| 7 | .\" Permission is granted to copy and distribute modified versions of this | |
| 8 | .\" manual under the conditions for verbatim copying, provided that the | |
| 9 | .\" entire resulting derived work is distributed under the terms of a | |
| 10 | .\" permission notice identical to this one. | |
| c13182ef | 11 | .\" |
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12 | .\" Since the Linux kernel and libraries are constantly changing, this |
| 13 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 14 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 15 | .\" the use of the information contained herein. The author(s) may not | |
| 16 | .\" have taken the same level of care in the production of this manual, | |
| 17 | .\" which is licensed free of charge, as they might when working | |
| 18 | .\" professionally. | |
| c13182ef | 19 | .\" |
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20 | .\" Formatted or processed versions of this manual, if unaccompanied by |
| 21 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 22 | .\" | |
| 23 | .\" References consulted: | |
| 24 | .\" Linux libc source code | |
| 25 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
| 26 | .\" 386BSD man pages | |
| 27 | .\" Modified Sat Jul 24 19:17:53 1993 by Rik Faith (faith@cs.unc.edu) | |
| cc4615cc | 28 | .TH GETUSERSHELL 3 2007-07-26 "GNU" "Linux Programmer's Manual" |
| fea681da | 29 | .SH NAME |
| e935e108 | 30 | getusershell, setusershell, endusershell \- get permitted user shells |
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31 | .SH SYNOPSIS |
| 32 | .nf | |
| 33 | .B #include <unistd.h> | |
| 34 | .sp | |
| 35 | .B char *getusershell(void); | |
| 36 | .sp | |
| 37 | .B void setusershell(void); | |
| 38 | .sp | |
| 39 | .B void endusershell(void); | |
| 40 | .fi | |
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41 | .sp |
| 42 | .in -4n | |
| 43 | Feature Test Macro Requirements for glibc (see | |
| 44 | .BR feature_test_macros (7)): | |
| 45 | .in | |
| 46 | .sp | |
| 47 | .ad l | |
| 48 | .BR getusershell (), | |
| 49 | .BR setusershell (), | |
| 50 | .BR endusershell (): | |
| c105dbb5 | 51 | .RS 4 |
| cc4615cc | 52 | _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE\ <\ 500) |
| c105dbb5 | 53 | .RE |
| cc4615cc | 54 | .ad b |
| fea681da | 55 | .SH DESCRIPTION |
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56 | The |
| 57 | .BR getusershell () | |
| 58 | function returns the next line from the file | |
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59 | \fI/etc/shells\fP, opening the file if necessary. |
| 60 | The line should contain | |
| 61 | the pathname of a valid user shell. | |
| 62 | If \fI/etc/shells\fP does not exist or | |
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63 | is unreadable, |
| 64 | .BR getusershell () | |
| 65 | behaves as if \fI/bin/sh\fP and | |
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66 | \fI/bin/csh\fP were listed in the file. |
| 67 | .PP | |
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68 | The |
| 69 | .BR setusershell () | |
| 70 | function rewinds \fI/etc/shells\fP. | |
| fea681da | 71 | .PP |
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72 | The |
| 73 | .BR endusershell () | |
| 74 | function closes \fI/etc/shells\fP. | |
| 47297adb | 75 | .SH RETURN VALUE |
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76 | The |
| 77 | .BR getusershell () | |
| 78 | function returns a NULL pointer on end-of-file. | |
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79 | .SH FILES |
| 80 | .nf | |
| 81 | /etc/shells | |
| 82 | .fi | |
| 47297adb | 83 | .SH CONFORMING TO |
| 44a2c328 | 84 | 4.3BSD. |
| 47297adb | 85 | .SH SEE ALSO |
| fea681da | 86 | .BR shells (5) |