1explain_system_or_die(3)   Library Functions Manual   explain_system_or_die(3)
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NAME

6       explain_system_or_die - execute a shell command and report errors
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SYNOPSIS

9       #include <libexplain/system.h>
10       void explain_system_or_die(const char *command);
11       void explain_system_success_or_die(const char *command);
12       int explain_system_success(const char *command);
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DESCRIPTION

15       These functions may be used to execute commands via the system(3) func‐
16       tion, and report the results.
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18   explain_system_or_die
19       void explain_system_or_die(const char *command);
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21       The explain_system_or_die function is used to call the system(3) system
22       call.   On  failure  an explanation will be printed to stderr, obtained
23       from explain_system(3), and then  the  process  terminates  by  calling
24       exit(EXIT_FAILURE).
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26       This  function  is intended to be used in a fashion similar to the fol‐
27       lowing example:
28              int status = explain_system_or_die(command);
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30       command The command, exactly as to be passed to  the  system(3)  system
31               call.
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33       Returns:
34               This  function  only returns on success, see system(3) for more
35               information.  On failure, prints an explanation and exits.
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37   explain_system_success_or_die
38       void explain_system_success_or_die(const char *command);
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40       The explain_system_success_or_die function is used  to  call  the  sys‐
41       tem(3)  system  call.  On failure, including any exit status other than
42       EXIT_SUCCESS, an explanation will be printed to stderr,  obtained  from
43       explain_system(3),   and   then   the  process  terminates  by  calling
44       exit(EXIT_FAILURE).
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46       This function is intended to be used in a fashion similar to  the  fol‐
47       lowing example:
48              explain_system_success_or_die(command);
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50       command The  command,  exactly  as to be passed to the system(3) system
51               call.
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53       Returns:
54               This function only returns on success.  On failure,  prints  an
55               explanation and exits.
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57   explain_system_success
58       int explain_system_success(const char *command);
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60       The  explain_system_success function is used to call the system(3) sys‐
61       tem call.  On failure, including any exit status other  than  EXIT_SUC‐
62       CESS,   an  explanation  will  be  printed  to  stderr,  obtained  from
63       explain_system(3).  However, the priniting of an error message does not
64       also cause exit(2) to be called.
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66       This  function  is intended to be used in a fashion similar to the fol‐
67       lowing example:
68              int status = explain_system_success(command);
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70       command The command, exactly as to be passed to  the  system(3)  system
71               call.
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73       Returns:
74               the  value returned by the system(3) system call.  In all cases
75               other than EXIT_SUCCESS, an error message will also  have  been
76               printed to stderr.
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SEE ALSO

79       system(3)
80               execute a shell command
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82       explain_system(3)
83               explain system(3) errors
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85       exit(2) terminate the calling process
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88       libexplain version 1.4
89       Copyright (C) 2008 Peter Miller
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93                                                      explain_system_or_die(3)
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