Mercurial > hg > toybox
annotate lib/password.c @ 848:feea7a8ecbb1
Redo find's indenting from tabs to two spaces.
author | Rob Landley <rob@landley.net> |
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date | Wed, 10 Apr 2013 19:58:21 -0500 |
parents | 786841fdb1e0 |
children | 77235d224b1d |
rev | line source |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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1 /* pwdutils.c - password read/update helper functions. |
626 | 2 * |
3 * Copyright 2012 Ashwini Kumar <ak.ashwini@gmail.com> | |
4 */ | |
5 | |
6 #include "toys.h" | |
7 #include <time.h> | |
8 | |
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9 int read_password(char * buff, int buflen, char* mesg) |
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10 { |
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11 int i = 0; |
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12 struct termios termio, oldtermio; |
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13 tcgetattr(0, &oldtermio); |
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14 tcflush(0, TCIFLUSH); |
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15 termio = oldtermio; |
626 | 16 |
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17 termio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); |
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18 termio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); |
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19 tcsetattr(0, TCSANOW, &termio); |
626 | 20 |
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21 fputs(mesg, stdout); |
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22 fflush(stdout); |
626 | 23 |
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24 while (1) { |
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25 int ret = read(0, &buff[i], 1); |
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26 if ( ret < 0 ) { |
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27 buff[0] = 0; |
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28 tcsetattr(0, TCSANOW, &oldtermio); |
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29 return 1; |
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30 } else if (ret == 0 || buff[i] == '\n' || buff[i] == '\r' || buflen == i+1) |
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31 { |
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32 buff[i] = '\0'; |
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33 break; |
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34 } |
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35 i++; |
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36 } |
626 | 37 |
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38 tcsetattr(0, TCSANOW, &oldtermio); |
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39 puts(""); |
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40 fflush(stdout); |
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41 return 0; |
626 | 42 } |
43 | |
44 static char *get_nextcolon(const char *line, char delim) | |
45 { | |
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46 char *current_ptr = NULL; |
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47 if((current_ptr = strchr(line, ':')) == NULL) error_exit("Invalid Entry\n"); |
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48 return current_ptr; |
626 | 49 } |
50 | |
637
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Use "_password" instead of "_passwd" for names in lib/password.c.
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51 int update_password(char *filename, char* username, char* encrypted) |
626 | 52 { |
694
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53 char *filenamesfx = NULL, *namesfx = NULL; |
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54 char *shadow = NULL, *sfx = NULL; |
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55 FILE *exfp, *newfp; |
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56 int ret = -1; //fail |
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57 struct flock lock; |
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58 char *line = NULL; |
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59 |
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60 shadow = strstr(filename, "shadow"); |
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61 filenamesfx = xmsprintf("%s+", filename); |
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62 sfx = strchr(filenamesfx, '+'); |
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63 |
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64 exfp = fopen(filename, "r+"); |
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65 if(!exfp) { |
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66 perror_msg("Couldn't open file %s",filename); |
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67 goto free_storage; |
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68 } |
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69 |
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70 *sfx = '-'; |
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71 ret = unlink(filenamesfx); |
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72 ret = link(filename, filenamesfx); |
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73 if(ret < 0) error_msg("can't create backup file"); |
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74 |
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75 *sfx = '+'; |
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76 lock.l_type = F_WRLCK; |
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77 lock.l_whence = SEEK_SET; |
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78 lock.l_start = 0; |
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79 lock.l_len = 0; |
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80 |
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81 ret = fcntl(fileno(exfp), F_SETLK, &lock); |
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82 if(ret < 0) perror_msg("Couldn't lock file %s",filename); |
626 | 83 |
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84 lock.l_type = F_UNLCK; //unlocking at a later stage |
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85 |
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86 newfp = fopen(filenamesfx, "w+"); |
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87 if(!newfp) { |
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88 error_msg("couldn't open file for writing"); |
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89 ret = -1; |
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90 fclose(exfp); |
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91 goto free_storage; |
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92 } |
626 | 93 |
694
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94 ret = 0; |
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95 namesfx = xmsprintf("%s:",username); |
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96 while((line = get_line(fileno(exfp))) != NULL) |
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97 { |
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98 if(strncmp(line, namesfx, strlen(namesfx)) != 0) |
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99 fprintf(newfp, "%s\n", line); |
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100 else { |
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101 char *current_ptr = NULL; |
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102 fprintf(newfp, "%s%s:",namesfx,encrypted); |
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103 current_ptr = get_nextcolon(line, ':'); //past username |
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104 current_ptr++; //past colon ':' after username |
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105 current_ptr = get_nextcolon(current_ptr, ':'); //past passwd |
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106 current_ptr++; //past colon ':' after passwd |
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107 if(shadow) { |
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108 fprintf(newfp, "%u:",(unsigned)(time(NULL))/(24*60*60)); |
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109 current_ptr = get_nextcolon(current_ptr, ':'); |
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110 current_ptr++; //past time stamp colon. |
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111 fprintf(newfp, "%s\n",current_ptr); |
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112 } |
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113 else fprintf(newfp, "%s\n",current_ptr); |
626 | 114 } |
115 | |
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116 free(line); |
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117 } |
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118 free(namesfx); |
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119 fcntl(fileno(exfp), F_SETLK, &lock); |
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120 fclose(exfp); |
626 | 121 |
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122 errno = 0; |
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123 fflush(newfp); |
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124 fsync(fileno(newfp)); |
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125 fclose(newfp); |
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126 rename(filenamesfx, filename); |
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127 if(errno) { |
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128 perror_msg("File Writing/Saving failed: "); |
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129 unlink(filenamesfx); |
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130 ret = -1; |
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131 } |
626 | 132 |
133 free_storage: | |
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134 free(filenamesfx); |
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135 return ret; |
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136 } |