OpenCoverage

getpass.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/coreutils/src/lib/getpass.c

Source code

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Line Source Count

2 -

3 This file is part of the GNU C Library. -

4 -

5 This program is free software; you can redistribute it and/or modify -

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

7 the Free Software Foundation; either version 3, or (at your option) -

8 any later version. -

9 -

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

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

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

13 GNU General Public License for more details. -

14 -

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

16 with this program; if not, see <https://www.gnu.org/licenses/>. */ -

17 -

18 #ifndef _LIBC -

19 # include <config.h> -

20 #endif -

21 -

22 #include "getpass.h" -

23 -

24 #include <stdio.h> -

25 -

26 #if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) -

27 -

28 # include <stdbool.h> -

29 -

30 # if HAVE_DECL___FSETLOCKING && HAVE___FSETLOCKING -

31 # if HAVE_STDIO_EXT_H -

32 # include <stdio_ext.h> -

33 # endif -

34 # else -

35 # define __fsetlocking(stream, type) /* empty */ -

36 # endif -

37 -

38 # if HAVE_TERMIOS_H -

39 # include <termios.h> -

40 # endif -

41 -

42 # if USE_UNLOCKED_IO -

43 # include "unlocked-io.h" -

44 # else -

45 # if !HAVE_DECL_FFLUSH_UNLOCKED -

46 # undef fflush_unlocked -

47 # define fflush_unlocked(x) fflush (x) -

48 # endif -

49 # if !HAVE_DECL_FLOCKFILE -

50 # undef flockfile -

51 # define flockfile(x) ((void) 0) -

52 # endif -

53 # if !HAVE_DECL_FUNLOCKFILE -

54 # undef funlockfile -

55 # define funlockfile(x) ((void) 0) -

56 # endif -

57 # if !HAVE_DECL_FPUTS_UNLOCKED -

58 # undef fputs_unlocked -

59 # define fputs_unlocked(str,stream) fputs (str, stream) -

60 # endif -

61 # if !HAVE_DECL_PUTC_UNLOCKED -

62 # undef putc_unlocked -

63 # define putc_unlocked(c,stream) putc (c, stream) -

64 # endif -

65 # endif -

66 -

67 /* It is desirable to use this bit on systems that have it. -

68 The only bit of terminal state we want to twiddle is echoing, which is -

69 done in software; there is no need to change the state of the terminal -

70 hardware. */ -

71 -

72 # ifndef TCSASOFT -

73 # define TCSASOFT 0 -

74 # endif -

75 -

76 static void -

77 call_fclose (void *arg) -

78 { -

if (arg != NULL)

arg != ((void *)0)	Description
TRUE	never evaluated
FALSE	never evaluated

fclose (arg);

never executed: rpl_fclose (arg);

}

never executed: end of block

82 -

83 char * -

84 getpass (const char *prompt) -

85 { -

86 FILE *tty; -

87 FILE *in, *out; -

88 # if HAVE_TCGETATTR -

89 struct termios s, t; -

90 # endif -

91 bool tty_changed = false; -

92 static char *buf; -

93 static size_t bufsize; -

94 ssize_t nread; -

95 -

96 /* Try to write to and read from the terminal if we can. -

97 If we can't open the terminal, use stderr and stdin. */ -

98 -

99 tty = fopen ("/dev/tty", "w+"); -

100

if (tty == NULL)

tty == ((void *)0)	Description
TRUE	never evaluated
FALSE	never evaluated

101 { -

102 in = stdin; -

103 out = stderr; -

104

}

never executed: end of block

105 else -

106 { -

107 /* We do the locking ourselves. */ -

108 __fsetlocking (tty, FSETLOCKING_BYCALLER); -

109 -

110 out = in = tty; -

111

}

never executed: end of block

112 -

113 flockfile (out); -

114 -

115 /* Turn echoing off if it is on now. */ -

116 # if HAVE_TCGETATTR -

117

if (tcgetattr (fileno (in), &t) == 0)

tcgetattr (fil...(in), &t) == 0	Description
TRUE	never evaluated
FALSE	never evaluated

118 { -

119 /* Save the old one. */ -

120 s = t; -

121 /* Tricky, tricky. */ -

122 t.c_lflag &= ~(ECHO | ISIG); -

123 tty_changed = (tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &t) == 0); -

124

}

never executed: end of block

125 # endif -

126 -

127 /* Write the prompt. */ -

128 fputs_unlocked (prompt, out); -

129 fflush_unlocked (out); -

130 -

131 /* Read the password. */ -

132 nread = getline (&buf, &bufsize, in); -

133 -

134 /* According to the C standard, input may not be followed by output -

135 on the same stream without an intervening call to a file -

136 positioning function. Suppose in == out; then without this fseek -

137 call, on Solaris, HP-UX, AIX, OSF/1, the previous input gets -

138 echoed, whereas on IRIX, the following newline is not output as -

139 it should be. POSIX imposes similar restrictions if fileno (in) -

140 == fileno (out). The POSIX restrictions are tricky and change -

141 from POSIX version to POSIX version, so play it safe and invoke -

142 fseek even if in != out. */ -

143 fseeko (out, 0, SEEK_CUR); -

144 -

145

if (buf != NULL)

buf != ((void *)0)	Description
TRUE	never evaluated
FALSE	never evaluated

146 { -

147

if (nread < 0)

nread < 0	Description
TRUE	never evaluated
FALSE	never evaluated

148

buf[0] = '\0';

never executed: buf[0] = '\0';

149

else if (buf[nread - 1] == '\n')

buf[nread - 1] == '\n'	Description
TRUE	never evaluated
FALSE	never evaluated

150 { -

151 /* Remove the newline. */ -

152 buf[nread - 1] = '\0'; -

153

if (tty_changed)

tty_changed	Description
TRUE	never evaluated
FALSE	never evaluated

154 { -

155 /* Write the newline that was not echoed. */ -

156 putc_unlocked ('\n', out); -

157

}

never executed: end of block

158

}

never executed: end of block

159

}

never executed: end of block

160 -

161 /* Restore the original setting. */ -

162 # if HAVE_TCSETATTR -

163

if (tty_changed)

tty_changed	Description
TRUE	never evaluated
FALSE	never evaluated

164

tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &s);

never executed: tcsetattr (fileno (in), 2 | 0, &s);

165 # endif -

166 -

167 funlockfile (out); -

168 -

169 call_fclose (tty); -

170 -

171

return buf;

never executed: return buf;

172 } -

173 -

174 #else /* W32 native */ -

175 -

176 /* Windows implementation by Martin Lambers <marlam@marlam.de>, -

177 improved by Simon Josefsson. */ -

178 -

179 /* For PASS_MAX. */ -

180 # include <limits.h> -

181 /* For _getch(). */ -

182 # include <conio.h> -

183 /* For strdup(). */ -

184 # include <string.h> -

185 -

186 # ifndef PASS_MAX -

187 # define PASS_MAX 512 -

188 # endif -

189 -

190 char * -

191 getpass (const char *prompt) -

192 { -

193 char getpassbuf[PASS_MAX + 1]; -

194 size_t i = 0; -

195 int c; -

196 -

197 if (prompt) -

198 { -

199 fputs (prompt, stderr); -

200 fflush (stderr); -

201 } -

202 -

203 for (;;) -

204 { -

205 c = _getch (); -

206 if (c == '\r') -

207 { -

208 getpassbuf[i] = '\0'; -

209 break; -

210 } -

211 else if (i < PASS_MAX) -

212 { -

213 getpassbuf[i++] = c; -

214 } -

215 -

216 if (i >= PASS_MAX) -

217 { -

218 getpassbuf[i] = '\0'; -

219 break; -

220 } -

221 } -

222 -

223 if (prompt) -

224 { -

225 fputs ("\r\n", stderr); -

226 fflush (stderr); -

227 } -

228 -

229 return strdup (getpassbuf); -

230 } -

231 #endif -

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