[ac7d5ef0] | 1 | /* |
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| 2 | * eolstrip - strip white space from end of lines |
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| 3 | * |
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| 4 | * This program strips the white space from the end of every line in the |
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| 5 | * specified program. |
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| 6 | * |
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| 7 | * usage: eolstrip [ -v ] [ arg ... ] files... |
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| 8 | * -v -- verbose |
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| 9 | * |
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| 10 | * $Id$ |
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| 11 | */ |
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| 12 | |
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| 13 | #define GETOPTARGS "vt" |
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| 14 | |
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| 15 | char *USAGE = "\ |
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| 16 | usage: cklength [ -v ] [ arg ... ] files... \n\ |
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| 17 | -v -- verbose\n\ |
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| 18 | -t -- test only .. DO NOT OVERWRITE FILE!!!\n\ |
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| 19 | \n\ |
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| 20 | Strip the white space from the end of every line on the list of files.\n\ |
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| 21 | "; |
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| 22 | |
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| 23 | #include <stdio.h> |
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[c62d36f] | 24 | #include <stdlib.h> |
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[ac7d5ef0] | 25 | #include <fcntl.h> |
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| 26 | #include <ctype.h> |
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| 27 | #include <stdlib.h> |
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| 28 | #include <unistd.h> |
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| 29 | #include <string.h> |
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| 30 | #include <memory.h> |
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| 31 | #include <stdarg.h> |
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| 32 | |
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[9ad1f13] | 33 | #include "config.h" |
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| 34 | |
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| 35 | #ifndef VMS |
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| 36 | #ifndef HAVE_STRERROR |
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| 37 | extern int sys_nerr; |
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| 38 | extern char *sys_errlist[]; |
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| 39 | |
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| 40 | #define strerror( _err ) \ |
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| 41 | ((_err) < sys_nerr) ? sys_errlist [(_err)] : "unknown error" |
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| 42 | |
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| 43 | #else /* HAVE_STRERROR */ |
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| 44 | char *strerror (); |
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| 45 | #endif |
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| 46 | #else /* VMS */ |
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| 47 | char *strerror (int,...); |
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| 48 | #endif |
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| 49 | |
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| 50 | |
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[ac7d5ef0] | 51 | #define BUFFER_SIZE 2048 |
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| 52 | #define MAX_PATH 2048 |
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| 53 | |
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| 54 | #define SUCCESS 0 |
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| 55 | #define FAILURE -1 |
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| 56 | #define Failed(x) (((int) (x)) == FAILURE) |
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| 57 | #define TRUE 1 |
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| 58 | #define FALSE 0 |
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| 59 | #define STREQ(a,b) (strcmp(a,b) == 0) |
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| 60 | #define NUMELEMS(arr) (sizeof(arr) / sizeof(arr[0])) |
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| 61 | |
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| 62 | /* |
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| 63 | * Definitions for unsigned "ints"; especially for use in data structures |
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| 64 | * that will be shared among (potentially) different cpu's (we punt on |
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| 65 | * byte ordering problems tho) |
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| 66 | */ |
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| 67 | |
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| 68 | typedef unsigned char u8; |
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| 69 | typedef unsigned short u16; |
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| 70 | typedef unsigned long u32; |
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| 71 | |
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| 72 | /* |
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| 73 | * vars controlled by command line options |
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| 74 | */ |
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| 75 | |
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| 76 | int verbose = FALSE; /* be verbose */ |
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| 77 | int test_only = FALSE; /* test only */ |
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| 78 | |
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| 79 | extern char *optarg; /* getopt(3) control vars */ |
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| 80 | extern int optind, opterr; |
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| 81 | extern int errno; |
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| 82 | |
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| 83 | char *progname; /* for error() */ |
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| 84 | |
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| 85 | int process(char *arg); |
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| 86 | void error(int errn, ...); |
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| 87 | long getparm(char *s, long min, long max, char *msg); |
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| 88 | |
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| 89 | #define ERR_ERRNO (1<<((sizeof(int) * 8) - 2)) /* hi bit; use 'errno' */ |
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| 90 | #define ERR_FATAL (ERR_ERRNO / 2) /* fatal error ; no return */ |
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| 91 | #define ERR_ABORT (ERR_ERRNO / 4) /* fatal error ; abort */ |
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| 92 | #define ERR_MASK (ERR_ERRNO | ERR_FATAL | ERR_ABORT) /* all */ |
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| 93 | |
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| 94 | #define stol(p) strtol(p, (char **) NULL, 0) |
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| 95 | int Open(), Read(), Write(); |
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| 96 | |
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[419fdf1] | 97 | int main( |
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| 98 | int argc, |
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| 99 | char **argv |
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| 100 | ) |
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[ac7d5ef0] | 101 | { |
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| 102 | register int c; |
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| 103 | int showusage = FALSE; /* usage error? */ |
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| 104 | int rc = 0; |
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| 105 | |
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| 106 | /* |
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| 107 | * figure out invocation leaf-name |
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| 108 | */ |
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| 109 | |
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| 110 | if ((progname = strrchr(argv[0], '/')) == (char *) NULL) |
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| 111 | progname = argv[0]; |
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| 112 | else |
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| 113 | progname++; |
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| 114 | |
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| 115 | argv[0] = progname; /* for getopt err reporting */ |
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| 116 | |
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| 117 | /* |
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| 118 | * Check options and arguments. |
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| 119 | */ |
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| 120 | |
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| 121 | opterr = 0; /* we'll report all errors */ |
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| 122 | while ((c = getopt(argc, argv, GETOPTARGS)) != EOF) |
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| 123 | switch (c) |
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| 124 | { |
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| 125 | case 't': /* toggle test only mode */ |
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| 126 | test_only = ! test_only; |
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| 127 | break; |
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| 128 | |
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| 129 | case 'v': /* toggle verbose */ |
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| 130 | verbose = ! verbose; |
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| 131 | break; |
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| 132 | |
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| 133 | case '?': |
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| 134 | showusage = TRUE; |
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| 135 | } |
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| 136 | |
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| 137 | if (showusage) |
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| 138 | { |
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| 139 | (void) fprintf(stderr, "%s", USAGE); |
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| 140 | exit(1); |
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| 141 | } |
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| 142 | |
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| 143 | /* |
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| 144 | * traverse and process the arguments |
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| 145 | */ |
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| 146 | |
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| 147 | for ( ; argv[optind]; optind++) |
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| 148 | if (Failed(process(argv[optind]))) |
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| 149 | rc = FAILURE; |
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| 150 | |
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| 151 | return rc; |
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| 152 | } |
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| 153 | |
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| 154 | |
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| 155 | /* |
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| 156 | * process(arg) |
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| 157 | */ |
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| 158 | |
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| 159 | int |
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| 160 | process(char *arg) |
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| 161 | { |
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| 162 | FILE *in; |
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| 163 | FILE *out = (FILE *) 0; |
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| 164 | char outname[ MAX_PATH ]; |
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| 165 | char *bptr; |
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| 166 | char buffer[ BUFFER_SIZE ]; |
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| 167 | int length; |
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| 168 | int line_number; |
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| 169 | int rc = SUCCESS; /* succeed by default */ |
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| 170 | |
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| 171 | in = fopen( arg, "r" ); |
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| 172 | if (!in) |
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| 173 | error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg ); |
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| 174 | |
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| 175 | if ( !test_only ) { |
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| 176 | sprintf( outname, "%s.eoltmp", arg ); |
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| 177 | |
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| 178 | out = fopen( outname, "w" ); |
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| 179 | if (!out) |
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| 180 | error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg ); |
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| 181 | } |
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| 182 | |
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| 183 | if ( verbose ) |
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| 184 | fprintf( stderr, "Processing %s\n", arg ); |
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| 185 | |
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| 186 | for ( line_number=1 ; ; line_number++ ) { |
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| 187 | bptr = fgets( buffer, BUFFER_SIZE, in ); |
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| 188 | if (!bptr) |
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| 189 | break; |
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| 190 | |
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| 191 | /* |
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| 192 | * Don't count the carriage return. |
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| 193 | */ |
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| 194 | |
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| 195 | length = strlen( buffer ) - 1; |
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| 196 | |
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| 197 | if ( buffer[ length ] != '\n' ) |
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| 198 | error(ERR_ERRNO|ERR_FATAL, "Line %d too long in %s\n", line_number, arg); |
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| 199 | |
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[2936b425] | 200 | while ( isspace( (int) buffer[ length ] ) ) |
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[ac7d5ef0] | 201 | buffer[ length-- ] = '\0'; |
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| 202 | |
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| 203 | if ( test_only ) { |
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| 204 | fprintf( stderr, "%s\n", arg ); |
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| 205 | break; |
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| 206 | } |
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| 207 | |
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| 208 | fprintf( out, "%s\n", buffer ); |
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| 209 | } |
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| 210 | |
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| 211 | fclose( in ); |
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| 212 | if ( !test_only ) { |
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| 213 | fclose( out ); |
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| 214 | rename( outname, arg ); |
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| 215 | } |
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| 216 | return rc; |
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| 217 | } |
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| 218 | |
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| 219 | /* |
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| 220 | * error(errn, arglist) |
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| 221 | * report an error to stderr using printf(3) conventions. |
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| 222 | * Any output is preceded by '<progname>: ' |
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| 223 | * |
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| 224 | * Uses ERR_FATAL bit to request exit(errn) |
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| 225 | * ERR_ABORT to request abort() |
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| 226 | * ERR_ERRNO to indicate use of errno instead of argument. |
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| 227 | * |
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| 228 | * If resulting 'errn' is non-zero, it is assumed to be an 'errno' and its |
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| 229 | * associated error message is appended to the output. |
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| 230 | */ |
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| 231 | |
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| 232 | /*VARARGS*/ |
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| 233 | |
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| 234 | void |
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| 235 | error(int error_flag, ...) |
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| 236 | { |
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| 237 | va_list arglist; |
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| 238 | register char *format; |
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| 239 | int local_errno; |
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| 240 | |
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| 241 | extern int errno; |
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| 242 | |
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| 243 | (void) fflush(stdout); /* in case stdout/stderr same */ |
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| 244 | |
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| 245 | local_errno = error_flag & ~ERR_MASK; |
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| 246 | if (error_flag & ERR_ERRNO) /* use errno? */ |
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| 247 | local_errno = errno; |
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| 248 | |
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| 249 | va_start(arglist, error_flag); |
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| 250 | format = va_arg(arglist, char *); |
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| 251 | (void) fprintf(stderr, "%s: ", progname); |
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| 252 | (void) vfprintf(stderr, format, arglist); |
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| 253 | va_end(arglist); |
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| 254 | |
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| 255 | if (local_errno) |
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[9ad1f13] | 256 | (void) fprintf(stderr, " (%s)\n", strerror(local_errno)); |
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[ac7d5ef0] | 257 | else |
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[9ad1f13] | 258 | (void) fprintf(stderr, "\n"); |
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[ac7d5ef0] | 259 | |
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| 260 | (void) fflush(stderr); |
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| 261 | |
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| 262 | if (error_flag & (ERR_FATAL | ERR_ABORT)) |
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| 263 | { |
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| 264 | if (error_flag & ERR_FATAL) |
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| 265 | { |
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[c64e4ed4] | 266 | error(0, "fatal error, exiting"); |
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| 267 | exit(local_errno ? local_errno : 1); |
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[ac7d5ef0] | 268 | } |
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| 269 | else |
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| 270 | { |
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| 271 | error(0, "fatal error, aborting"); |
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| 272 | abort(); |
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| 273 | } |
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| 274 | } |
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| 275 | } |
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| 276 | |
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| 277 | long |
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| 278 | getparm(char *s, |
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| 279 | long min, |
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| 280 | long max, |
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| 281 | char *msg) |
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| 282 | { |
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| 283 | long val; |
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| 284 | |
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| 285 | if ( ! strchr("0123456789-", *s)) |
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| 286 | { |
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| 287 | error(ERR_FATAL, "'%s' is not a number", s); |
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| 288 | return min; |
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| 289 | } |
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| 290 | |
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| 291 | val = strtol(s, (char **) NULL, 0); |
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| 292 | if ((val < min) || (val > max)) |
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| 293 | { |
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| 294 | if (min == max) |
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| 295 | error(ERR_FATAL, "%s can only be %ld", s, min); |
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| 296 | else |
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| 297 | error(ERR_FATAL, "%s must be between %ld and %ld", msg, min, max); |
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| 298 | } |
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| 299 | |
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| 300 | return val; |
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| 301 | } |
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| 302 | |
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| 303 | |
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| 304 | /* |
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| 305 | * Open() |
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| 306 | * Perform open(2), returning the file descriptor. Prints |
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| 307 | * error message if open fails. |
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| 308 | */ |
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| 309 | |
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| 310 | int |
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| 311 | Open(char *file, |
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| 312 | int oflag, |
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| 313 | int mode) |
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| 314 | { |
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| 315 | int O_fd; |
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| 316 | |
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| 317 | if (Failed(O_fd = open(file, oflag, mode))) |
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| 318 | error( |
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| 319 | ERR_ERRNO | ERR_FATAL, |
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| 320 | "open('%s', 0x%x, 0%o) failed", file, oflag, mode |
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| 321 | ); |
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| 322 | |
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| 323 | return O_fd; |
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| 324 | } |
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| 325 | |
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| 326 | /* |
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| 327 | * Read() |
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| 328 | * Perform read(2); prints error message if fails. |
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| 329 | */ |
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| 330 | |
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| 331 | int |
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| 332 | Read(int file, |
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| 333 | char *buffer, |
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| 334 | unsigned int count) |
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| 335 | { |
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| 336 | int nbytes; |
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| 337 | |
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| 338 | if (Failed(nbytes = read(file, buffer, count))) |
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| 339 | error( |
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| 340 | ERR_ERRNO | ERR_FATAL, |
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| 341 | "read(%d, 0x%x, %d) failed", file, buffer, count |
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| 342 | ); |
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| 343 | |
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| 344 | return nbytes; |
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| 345 | } |
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| 346 | |
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| 347 | /* |
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| 348 | * Write() |
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| 349 | * Perform write(2); prints error message if fails. |
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| 350 | */ |
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| 351 | |
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| 352 | int |
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| 353 | Write(int file, |
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| 354 | char *buffer, |
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| 355 | unsigned int count) |
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| 356 | { |
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| 357 | int nbytes; |
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| 358 | |
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| 359 | if (Failed(nbytes = write(file, buffer, count))) |
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| 360 | error( |
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| 361 | ERR_ERRNO | ERR_FATAL, |
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| 362 | "write(%d, 0x%x, %d) failed", file, buffer, count |
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| 363 | ); |
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| 364 | |
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| 365 | return nbytes; |
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| 366 | } |
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