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annotate toys/posix/touch.c @ 701:7b316e3c0e11

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Fix touch warnings (unused variables, failure to reserve space for null terminator).
author Rob Landley <rob@landley.net>
date Fri, 16 Nov 2012 15:44:45 -0600
parents ad6bff0c9169
children 9fb5fe6eb13f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
699
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * touch.c : change timestamp of a file
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4 * Copyright 2012 Choubey Ji <warior.linux@gmail.com>
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5 *
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6 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html
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7
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8 USE_TOUCH(NEWTOY(touch, "mrt", TOYFLAG_BIN))
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9
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10 config TOUCH
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11 bool "th"
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12 default y
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13 help
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14 Usage: Usage: touch [OPTION]... FILE...
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15 Update the access and modification times of each FILE to the current time.
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16 -m change only the modification time
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17 -r, --reference=FILE use this file's times instead of current time
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18 -t STAMP use [[CC]YY]MMDDhhmm[.ss] instead of current time
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19 */
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20
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21 #include "toys.h"
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22
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23 int check_date_format(char *date_input)
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24 {
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25 int count_date_digit = 0;
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26 unsigned long long flag_b4_sec;
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27 int flag_af_sec;
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28 char *date_store = (char *)malloc(12 * sizeof(char));
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29
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30 while(date_input[count_date_digit] != '.') {
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31 date_store[count_date_digit] = date_input[count_date_digit];
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32 count_date_digit++;
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33 }
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34 date_store[count_date_digit++] = '\0';
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35 flag_b4_sec = atoll(date_store);
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36 date_store[0] = date_input[count_date_digit++];
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37 date_store[1] = date_input[count_date_digit];
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38 date_store[2] = '\0';
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39 flag_af_sec = atoi(date_store);
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40 if(date_store[0] == '0' && date_store[1] == '0') flag_af_sec = 1;
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41 if(flag_b4_sec && flag_af_sec) return 0;
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42 else return -1;
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43 }
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44
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45 /* function to return number of seconds since epoch till the given date */
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46 time_t get_time_sec(char *date_input)
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47 {
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48 int count_date_digit = 0;
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49 char mm[3];
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50 char year[5];
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51 time_t time_of_modify;
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52 struct tm t_yyyymmddhhss;
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53
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54 while(date_input[count_date_digit] != '.') {
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55 if(count_date_digit < 4)
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56 year[count_date_digit] = date_input[count_date_digit];
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57 count_date_digit++;
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58 if(count_date_digit == 4) {
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59 year[count_date_digit] = '\0';
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60 t_yyyymmddhhss.tm_year = atoi(year)-1900;
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61 break;
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62 }
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63 }
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64 mm[0] = date_input[4];
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65 mm[1] = date_input[5];
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66 mm[2] = '\0';
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67 t_yyyymmddhhss.tm_mon = (atoi(mm) - 1);
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68 mm[0] = date_input[6];
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69 mm[1] = date_input[7];
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70 mm[2] = '\0';
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71 t_yyyymmddhhss.tm_mday = atoi(mm);
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72 mm[0] = date_input[8];
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73 mm[1] = date_input[9];
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74 mm[2] = '\0';
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75 t_yyyymmddhhss.tm_hour = atoi(mm);
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76 mm[0] = date_input[10];
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77 mm[1] = date_input[11];
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78 mm[2] = '\0';
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79 t_yyyymmddhhss.tm_min = atoi(mm);
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80 mm[0] = date_input[13];
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81 mm[1] = date_input[14];
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82 mm[2] = '\0';
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83 t_yyyymmddhhss.tm_sec = atoi(mm);
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84 time_of_modify = mktime(&t_yyyymmddhhss);
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85 return time_of_modify;
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86 }
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87
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88 void touch_main(void)
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89 {
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90 int fd, touch_flag_t = 0, touch_flag_m = 0, touch_flag_r = 0;
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91 time_t now;
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92 struct utimbuf modinfo;
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93 struct stat filestat;
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94
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95 if (!toys.optflags) {
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96 time(&now);
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97 modinfo.modtime = now;
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98 modinfo.actime = now;
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99 } else {
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100 if (toys.optflags & 1) {
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101 touch_flag_t = 1;
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102 if ((toys.optflags >> 2) & 1) touch_flag_m = 1;
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103 }
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104
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105 if ((toys.optflags >> 1) & 1) touch_flag_r = 1;
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106
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107 if (toys.optflags >> 2) touch_flag_m = 1;
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108 }
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109
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110 if (touch_flag_t) {
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111 if (!check_date_format(toys.optargs[0])) {
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112 modinfo.modtime = get_time_sec((char *)toys.optargs[0]);
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113 modinfo.actime = get_time_sec(toys.optargs[0]);
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114 } else {
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115 perror_msg("Invalid date format, -t [yyyyMMddhhmm.ss]");
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116 toys.exitval = EXIT_FAILURE;
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117 }
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118 }
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119 if(touch_flag_r) {
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120 if(stat(toys.optargs[0], &filestat) < 0) {
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121 printf("Error : unable to get information for file %s\n", toys.optargs[0]);
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122 toys.exitval = EXIT_FAILURE;
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123 }
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124 modinfo.modtime = filestat.st_mtime;
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125 modinfo.actime = filestat.st_atime;
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126 }
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127 if(touch_flag_m) {
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128 if(stat(toys.optargs[toys.optc - 1], &filestat) < 0) {
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129 toys.exitval = EXIT_FAILURE;
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130 return;
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131 }
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132 modinfo.actime = filestat.st_atime;
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133 if(!(touch_flag_r | touch_flag_t)) {
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134 time(&now);
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135 modinfo.modtime = now;
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136 }
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137 }
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138 if (utime(toys.optargs[toys.optc - 1], &modinfo) == -1) {
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
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139 if ((fd = open(toys.optargs[toys.optc - 1],O_CREAT |O_RDWR, 0644)) != -1) {
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
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140 close(fd);
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Rob Landley <rob@landley.net>
parents: 699
diff changeset
141 utime(toys.optargs[toys.optc - 1], &modinfo);
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
142 } else {
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
143 perror("unable to create the file");
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
144 toys.exitval = EXIT_FAILURE;
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
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145 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
146 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
147 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
148
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
149