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tty.c

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/home/opencoverage/opencoverage/guest-scripts/coreutils/src/src/tty.c

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1 /* tty -- print the name of the terminal connected to standard input -

3 -

4 This program is free software: you can redistribute it and/or modify -

5 it under the terms of the GNU General Public License as published by -

6 the Free Software Foundation, either version 3 of the License, or -

7 (at your option) any later version. -

8 -

9 This program is distributed in the hope that it will be useful, -

10 but WITHOUT ANY WARRANTY; without even the implied warranty of -

11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -

12 GNU General Public License for more details. -

13 -

14 You should have received a copy of the GNU General Public License -

15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ -

16 -

17 /* Displays "not a tty" if stdin is not a terminal. -

18 Displays nothing if -s option is given. -

19 Exit status 0 if stdin is a tty, 1 if not a tty, 2 if usage error, -

20 3 if write error. -

21 -

22 Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ -

23 -

24 #include <config.h> -

25 #include <stdio.h> -

26 #include <getopt.h> -

27 #include <sys/types.h> -

28 -

29 #include "system.h" -

30 #include "error.h" -

31 #include "quote.h" -

32 -

33 /* Exit statuses. */ -

34 enum -

35 { -

36 TTY_STDIN_NOTTY = 1, -

37 TTY_FAILURE = 2, -

38 TTY_WRITE_ERROR = 3 -

39 }; -

40 -

41 /* The official name of this program (e.g., no 'g' prefix). */ -

42 #define PROGRAM_NAME "tty" -

43 -

44 #define AUTHORS proper_name ("David MacKenzie") -

45 -

46 /* If true, return an exit status but produce no output. */ -

47 static bool silent; -

48 -

49 static struct option const longopts[] = -

50 { -

51 {"silent", no_argument, NULL, 's'}, -

52 {"quiet", no_argument, NULL, 's'}, -

53 {GETOPT_HELP_OPTION_DECL}, -

54 {GETOPT_VERSION_OPTION_DECL}, -

55 {NULL, 0, NULL, 0} -

56 }; -

57 -

58 void -

59 usage (int status) -

60 { -

if (status != EXIT_SUCCESS)

status != 0	Description
TRUE	evaluated 5 times by 1 test Evaluated by: tty
FALSE	evaluated 6 times by 1 test Evaluated by: tty

5-6

emit_try_help ();

executed 5 times by 1 test: end of block

Executed by:

63 else -

64 { -

65 printf (_("Usage: %s [OPTION]...\n"), program_name); -

66 fputs (_("\ -

67 Print the file name of the terminal connected to standard input.\n\ -

68 \n\ -

69 -s, --silent, --quiet print nothing, only return an exit status\n\ -

70 "), stdout); -

71 fputs (HELP_OPTION_DESCRIPTION, stdout); -

72 fputs (VERSION_OPTION_DESCRIPTION, stdout); -

73 emit_ancillary_info (PROGRAM_NAME); -

}

executed 6 times by 1 test: end of block

Executed by:

exit (status);

executed 11 times by 1 test: exit (status);

Executed by:

76 } -

77 -

78 int -

79 main (int argc, char **argv) -

80 { -

81 int optc; -

82 -

83 initialize_main (&argc, &argv); -

84 set_program_name (argv[0]); -

85 setlocale (LC_ALL, ""); -

86 bindtextdomain (PACKAGE, LOCALEDIR); -

87 textdomain (PACKAGE); -

88 -

89 initialize_exit_failure (TTY_WRITE_ERROR); -

90 atexit (close_stdout); -

91 -

92 silent = false; -

93 -

while ((optc = getopt_long (argc, argv, "s", longopts, NULL)) != -1)

(optc = getopt... *)0) )) != -1	Description
TRUE	evaluated 24 times by 1 test Evaluated by: tty
FALSE	evaluated 11 times by 1 test Evaluated by: tty

11-24

95 { -

96 switch (optc) -

97 { -

case 's':

executed 11 times by 1 test: case 's':

Executed by:

99 silent = true; -

100

break;

executed 11 times by 1 test: break;

Executed by:

101 -

102

case_GETOPT_HELP_CHAR;

never executed: break;

executed 6 times by 1 test: case GETOPT_HELP_CHAR:

Executed by:

0-6

103 -

104

case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);

executed 4 times by 1 test: exit ( 0 );

Executed by:

never executed: break;

executed 4 times by 1 test: case GETOPT_VERSION_CHAR:

Executed by:

0-4

105 -

106

default:

executed 3 times by 1 test: default:

Executed by:

107 usage (TTY_FAILURE); -

108

}

never executed: end of block

109 } -

110 -

111

if (optind < argc)

optind < argc	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tty
FALSE	evaluated 9 times by 1 test Evaluated by: tty

2-9

112 { -

113 error (0, 0, _("extra operand %s"), quote (argv[optind])); -

114 usage (TTY_FAILURE); -

115

}

never executed: end of block

116 -

117 errno = ENOENT; -

118 -

119

if (silent)

silent	Description
TRUE	evaluated 7 times by 1 test Evaluated by: tty
FALSE	evaluated 2 times by 1 test Evaluated by: tty

2-7

120

return isatty (STDIN_FILENO) ? EXIT_SUCCESS : TTY_STDIN_NOTTY;

executed 7 times by 1 test: return isatty ( 0 ) ? 0 : TTY_STDIN_NOTTY;

Executed by:

121 -

122 int status = EXIT_SUCCESS; -

123 char const *tty = ttyname (STDIN_FILENO); -

124 -

125

if (! tty)

! tty	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tty
FALSE	never evaluated

0-2

126 { -

127 tty = _("not a tty"); -

128 status = TTY_STDIN_NOTTY; -

129

}

executed 2 times by 1 test: end of block

Executed by:

130 -

131 puts (tty); -

132

return status;

executed 2 times by 1 test: return status;

Executed by:

133 } -

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