1 | /* |
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2 | * cklength - check the length of lines in a file |
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3 | * |
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4 | * This program check to see if the files passed to it on the command line |
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5 | * contain a line which exceeds the maximum allowable length. The default |
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6 | * maximum line length is 80. |
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7 | * |
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8 | * usage: cklength [ -v ] [ arg ... ] files... |
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9 | * -l length -- maximum line length |
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10 | * -v -- verbose |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #define GETOPTARGS "l:nNv" |
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16 | |
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17 | char *USAGE = "\ |
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18 | usage: cklength [ -v ] [ arg ... ] files... \n\ |
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19 | -l length -- maximum line length\n\ |
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20 | -n -- report line numbers for offending lines\n\ |
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21 | -N -- report line numbers and length for offending lines\n\ |
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22 | -v -- verbose\n\ |
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23 | \n\ |
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24 | Print the name of files which have at least 1 line which exceeds the\n\ |
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25 | maximum line length. The default maximum line length is 80.\n\ |
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26 | "; |
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27 | |
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28 | #include <stdio.h> |
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29 | #include <stdlib.h> |
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30 | #include <fcntl.h> |
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31 | #include <ctype.h> |
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32 | #include <stdlib.h> |
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33 | #include <unistd.h> |
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34 | #include <string.h> |
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35 | #include <memory.h> |
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36 | #include <stdarg.h> |
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37 | #include <errno.h> |
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38 | |
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39 | #include "config.h" |
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40 | |
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41 | #ifndef VMS |
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42 | #ifndef HAVE_STRERROR |
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43 | extern int sys_nerr; |
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44 | extern char *sys_errlist[]; |
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45 | |
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46 | #define strerror( _err ) \ |
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47 | ((_err) < sys_nerr) ? sys_errlist [(_err)] : "unknown error" |
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48 | |
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49 | #else /* HAVE_STRERROR */ |
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50 | char *strerror (); |
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51 | #endif |
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52 | #else /* VMS */ |
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53 | char *strerror (int,...); |
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54 | #endif |
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55 | |
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56 | |
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57 | #define BUFFER_SIZE 512 |
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58 | |
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59 | #define SUCCESS 0 |
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60 | #define FAILURE -1 |
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61 | #define Failed(x) (((int) (x)) == FAILURE) |
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62 | #define TRUE 1 |
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63 | #define FALSE 0 |
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64 | #define STREQ(a,b) (strcmp(a,b) == 0) |
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65 | #define NUMELEMS(arr) (sizeof(arr) / sizeof(arr[0])) |
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66 | |
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67 | /* |
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68 | * Definitions for unsigned "ints"; especially for use in data structures |
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69 | * that will be shared among (potentially) different cpu's (we punt on |
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70 | * byte ordering problems tho) |
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71 | */ |
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72 | |
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73 | typedef unsigned char u8; |
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74 | typedef unsigned short u16; |
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75 | typedef unsigned long u32; |
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76 | |
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77 | /* |
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78 | * vars controlled by command line options |
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79 | */ |
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80 | |
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81 | int verbose = FALSE; /* be verbose */ |
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82 | int report_line_numbers = FALSE; /* report line numbers of offenders */ |
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83 | int report_line_length = FALSE; /* report line length of offenders */ |
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84 | |
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85 | int line_length = 80; /* maximum allowable line length */ |
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86 | |
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87 | extern char *optarg; /* getopt(3) control vars */ |
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88 | extern int optind, opterr; |
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89 | |
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90 | char *progname; /* for error() */ |
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91 | |
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92 | int process(char *arg); |
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93 | void error(int errn, ...); |
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94 | long getparm(char *s, long min, long max, char *msg); |
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95 | |
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96 | #define ERR_ERRNO (1<<((sizeof(int) * 8) - 2)) /* hi bit; use 'errno' */ |
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97 | #define ERR_FATAL (ERR_ERRNO / 2) /* fatal error ; no return */ |
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98 | #define ERR_ABORT (ERR_ERRNO / 4) /* fatal error ; abort */ |
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99 | #define ERR_MASK (ERR_ERRNO | ERR_FATAL | ERR_ABORT) /* all */ |
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100 | |
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101 | #define stol(p) strtol(p, (char **) NULL, 0) |
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102 | int Open(), Read(), Write(); |
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103 | |
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104 | int main( |
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105 | int argc, |
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106 | char **argv |
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107 | ) |
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108 | { |
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109 | register int c; |
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110 | int showusage = FALSE; /* usage error? */ |
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111 | int rc = 0; |
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112 | |
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113 | /* |
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114 | * figure out invocation leaf-name |
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115 | */ |
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116 | |
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117 | if ((progname = strrchr(argv[0], '/')) == (char *) NULL) |
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118 | progname = argv[0]; |
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119 | else |
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120 | progname++; |
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121 | |
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122 | argv[0] = progname; /* for getopt err reporting */ |
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123 | |
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124 | /* |
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125 | * Check options and arguments. |
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126 | */ |
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127 | |
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128 | opterr = 0; /* we'll report all errors */ |
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129 | while ((c = getopt(argc, argv, GETOPTARGS)) != EOF) |
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130 | switch (c) |
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131 | { |
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132 | case 'l': /* line length */ |
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133 | line_length = atoi( optarg ); |
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134 | if ( line_length < 0 || line_length > BUFFER_SIZE ) |
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135 | error(ERR_FATAL, "(%d) is illegal line length\n",line_length); |
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136 | break; |
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137 | |
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138 | case 'n': /* toggle report_line_numbers */ |
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139 | report_line_numbers = ! report_line_numbers; |
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140 | break; |
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141 | |
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142 | case 'N': /* toggle both reports */ |
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143 | report_line_numbers = ! report_line_numbers; |
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144 | report_line_length = ! report_line_length; |
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145 | break; |
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146 | |
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147 | case 'v': /* toggle verbose */ |
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148 | verbose = ! verbose; |
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149 | break; |
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150 | |
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151 | case '?': |
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152 | showusage = TRUE; |
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153 | } |
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154 | |
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155 | if (showusage) |
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156 | { |
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157 | (void) fprintf(stderr, "%s", USAGE); |
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158 | exit(1); |
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159 | } |
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160 | |
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161 | /* |
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162 | * traverse and process the arguments |
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163 | */ |
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164 | |
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165 | for ( ; argv[optind]; optind++) |
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166 | if (Failed(process(argv[optind]))) |
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167 | rc = FAILURE; |
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168 | |
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169 | return rc; |
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170 | } |
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171 | |
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172 | |
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173 | /* |
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174 | * process(arg) |
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175 | */ |
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176 | |
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177 | int |
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178 | process(char *arg) |
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179 | { |
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180 | FILE *in; |
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181 | char *bptr; |
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182 | char buffer[ BUFFER_SIZE ]; |
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183 | int line_number; |
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184 | int length; |
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185 | int count; |
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186 | int rc = SUCCESS; /* succeed by default */ |
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187 | |
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188 | in = fopen( arg, "r" ); |
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189 | if (!in) |
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190 | error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg ); |
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191 | |
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192 | count = 0; |
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193 | |
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194 | for ( line_number=1 ; ; line_number++ ) { |
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195 | bptr = fgets( buffer, BUFFER_SIZE, in ); |
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196 | if (!bptr) |
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197 | break; |
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198 | |
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199 | /* |
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200 | * Don't count the carriage return. |
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201 | */ |
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202 | |
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203 | length = strlen( buffer ) - 1; |
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204 | |
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205 | if ( length <= line_length ) |
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206 | continue; |
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207 | |
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208 | if ( count == 0 ) { |
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209 | fprintf( stderr, "%s\n", arg ); |
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210 | if ( !report_line_numbers ) |
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211 | break; |
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212 | } |
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213 | |
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214 | if ( verbose ) |
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215 | fprintf( stderr, "TOO LONG:%d: %s\n", line_number, buffer ); |
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216 | |
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217 | if ( report_line_numbers ) { |
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218 | if ( report_line_length ) |
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219 | fprintf( stderr, "%d: %d\n" , line_number, length ); |
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220 | else |
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221 | fprintf( stderr, "%d\n" , line_number ); |
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222 | } |
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223 | |
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224 | count++; |
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225 | |
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226 | } |
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227 | |
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228 | fclose( in ); |
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229 | return rc; |
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230 | } |
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231 | |
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232 | /* |
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233 | * error(errn, arglist) |
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234 | * report an error to stderr using printf(3) conventions. |
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235 | * Any output is preceded by '<progname>: ' |
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236 | * |
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237 | * Uses ERR_FATAL bit to request exit(errn) |
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238 | * ERR_ABORT to request abort() |
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239 | * ERR_ERRNO to indicate use of errno instead of argument. |
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240 | * |
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241 | * If resulting 'errn' is non-zero, it is assumed to be an 'errno' and its |
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242 | * associated error message is appended to the output. |
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243 | */ |
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244 | |
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245 | /*VARARGS*/ |
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246 | |
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247 | void |
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248 | error(int error_flag, ...) |
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249 | { |
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250 | va_list arglist; |
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251 | register char *format; |
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252 | int local_errno; |
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253 | |
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254 | extern int errno; |
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255 | |
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256 | (void) fflush(stdout); /* in case stdout/stderr same */ |
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257 | |
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258 | local_errno = error_flag & ~ERR_MASK; |
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259 | if (error_flag & ERR_ERRNO) /* use errno? */ |
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260 | local_errno = errno; |
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261 | |
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262 | va_start(arglist, error_flag); |
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263 | format = va_arg(arglist, char *); |
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264 | (void) fprintf(stderr, "%s: ", progname); |
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265 | (void) vfprintf(stderr, format, arglist); |
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266 | va_end(arglist); |
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267 | |
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268 | if (local_errno) |
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269 | (void) fprintf(stderr, " (%s)\n", strerror(local_errno)); |
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270 | |
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271 | (void) fflush(stderr); |
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272 | |
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273 | if (error_flag & (ERR_FATAL | ERR_ABORT)) |
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274 | { |
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275 | if (error_flag & ERR_FATAL) |
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276 | { |
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277 | error(0, "fatal error, exiting"); |
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278 | exit(local_errno ? local_errno : 1); |
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279 | } |
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280 | else |
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281 | { |
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282 | error(0, "fatal error, aborting"); |
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283 | abort(); |
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284 | } |
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285 | } |
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286 | } |
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287 | |
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288 | long |
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289 | getparm(char *s, |
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290 | long min, |
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291 | long max, |
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292 | char *msg) |
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293 | { |
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294 | long val; |
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295 | |
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296 | if ( ! strchr("0123456789-", *s)) |
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297 | { |
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298 | error(ERR_FATAL, "'%s' is not a number", s); |
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299 | return min; |
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300 | } |
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301 | |
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302 | val = strtol(s, (char **) NULL, 0); |
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303 | if ((val < min) || (val > max)) |
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304 | { |
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305 | if (min == max) |
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306 | error(ERR_FATAL, "%s can only be %ld", s, min); |
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307 | else |
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308 | error(ERR_FATAL, "%s must be between %ld and %ld", msg, min, max); |
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309 | } |
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310 | |
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311 | return val; |
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312 | } |
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313 | |
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314 | |
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315 | /* |
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316 | * Open() |
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317 | * Perform open(2), returning the file descriptor. Prints |
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318 | * error message if open fails. |
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319 | */ |
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320 | |
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321 | int |
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322 | Open(char *file, |
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323 | int oflag, |
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324 | int mode) |
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325 | { |
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326 | int O_fd; |
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327 | |
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328 | if (Failed(O_fd = open(file, oflag, mode))) |
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329 | error( |
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330 | ERR_ERRNO | ERR_FATAL, |
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331 | "open('%s', 0x%x, 0%o) failed", file, oflag, mode |
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332 | ); |
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333 | |
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334 | return O_fd; |
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335 | } |
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336 | |
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337 | /* |
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338 | * Read() |
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339 | * Perform read(2); prints error message if fails. |
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340 | */ |
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341 | |
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342 | int |
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343 | Read(int file, |
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344 | char *buffer, |
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345 | unsigned int count) |
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346 | { |
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347 | int nbytes; |
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348 | |
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349 | if (Failed(nbytes = read(file, buffer, count))) |
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350 | error( |
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351 | ERR_ERRNO | ERR_FATAL, |
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352 | "read(%d, 0x%x, %d) failed", file, buffer, count |
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353 | ); |
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354 | |
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355 | return nbytes; |
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356 | } |
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357 | |
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358 | /* |
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359 | * Write() |
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360 | * Perform write(2); prints error message if fails. |
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361 | */ |
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362 | |
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363 | int |
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364 | Write(int file, |
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365 | char *buffer, |
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366 | unsigned int count) |
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367 | { |
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368 | int nbytes; |
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369 | |
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370 | if (Failed(nbytes = write(file, buffer, count))) |
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371 | error( |
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372 | ERR_ERRNO | ERR_FATAL, |
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373 | "write(%d, 0x%x, %d) failed", file, buffer, count |
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374 | ); |
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375 | |
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376 | return nbytes; |
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377 | } |
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