source: rtems/c/build-tools/src/eolstrip.c @ 607e0a25

4.104.114.84.95
Last change on this file since 607e0a25 was 607e0a25, checked in by Joel Sherrill <joel.sherrill@…>, on 03/03/98 at 16:20:52

Switched from "extern int errno" to "#include <errno.h>".

  • Property mode set to 100644
File size: 7.7 KB
Line 
1/*
2 *  eolstrip - strip white space from end of lines
3 *
4 *  This program strips the white space from the end of every line in the
5 *  specified program.
6 *
7 *  usage:  eolstrip  [ -v ] [ arg ... ] files...
8 *           -v          -- verbose
9 *
10 * $Id$
11 */
12
13#define GETOPTARGS "vt"
14
15char *USAGE = "\
16usage:  cklength  [ -v ] [ arg ... ] files... \n\
17            -v          -- verbose\n\
18            -t          -- test only .. DO NOT OVERWRITE FILE!!!\n\
19\n\
20Strip the white space from the end of every line on the list of files.\n\
21";
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <fcntl.h>
26#include <ctype.h>
27#include <stdlib.h>
28#include <unistd.h>
29#include <string.h>
30#include <memory.h>
31#include <stdarg.h>
32#include <errno.h>
33
34#include "config.h"
35
36#ifndef VMS
37#ifndef HAVE_STRERROR
38extern int sys_nerr;
39extern char *sys_errlist[];
40
41#define strerror( _err ) \
42  ((_err) < sys_nerr) ? sys_errlist [(_err)] : "unknown error"
43
44#else   /* HAVE_STRERROR */
45char *strerror ();
46#endif
47#else   /* VMS */
48char *strerror (int,...);
49#endif
50
51
52#define BUFFER_SIZE     2048
53#define MAX_PATH        2048
54
55#define SUCCESS         0
56#define FAILURE         -1
57#define Failed(x)       (((int) (x)) == FAILURE)
58#define TRUE    1
59#define FALSE   0
60#define STREQ(a,b)      (strcmp(a,b) == 0)
61#define NUMELEMS(arr)   (sizeof(arr) / sizeof(arr[0]))
62
63/*
64 * Definitions for unsigned "ints"; especially for use in data structures
65 *  that will be shared among (potentially) different cpu's (we punt on
66 *  byte ordering problems tho)
67 */
68
69typedef unsigned char   u8;
70typedef unsigned short  u16;
71typedef unsigned long   u32;
72
73/*
74 * vars controlled by command line options
75 */
76
77int verbose = FALSE;                    /* be verbose */
78int test_only = FALSE;                  /* test only */
79
80extern char *optarg;                    /* getopt(3) control vars */
81extern int optind, opterr;
82
83char *progname;                         /* for error() */
84
85int process(char *arg);
86void error(int errn, ...);
87long getparm(char *s, long min, long max, char *msg);
88
89#define ERR_ERRNO  (1<<((sizeof(int) * 8) - 2)) /* hi bit; use 'errno' */
90#define ERR_FATAL  (ERR_ERRNO / 2)              /* fatal error ; no return */
91#define ERR_ABORT  (ERR_ERRNO / 4)              /* fatal error ; abort */
92#define ERR_MASK   (ERR_ERRNO | ERR_FATAL | ERR_ABORT) /* all */
93
94#define stol(p) strtol(p, (char **) NULL, 0)
95int  Open(), Read(), Write();
96
97int main(
98  int argc,
99  char **argv
100)
101{
102    register int c;
103    int showusage = FALSE;                      /* usage error? */
104    int rc = 0;
105
106    /*
107     * figure out invocation leaf-name
108     */
109
110    if ((progname = strrchr(argv[0], '/')) == (char *) NULL)
111        progname = argv[0];
112    else
113        progname++;
114
115    argv[0] = progname;                         /* for getopt err reporting */
116
117    /*
118     *  Check options and arguments.
119     */
120
121    opterr = 0;                                 /* we'll report all errors */
122    while ((c = getopt(argc, argv, GETOPTARGS)) != EOF)
123        switch (c)
124        {
125            case 't':                           /* toggle test only mode */
126                test_only = ! test_only;
127                break;
128
129            case 'v':                           /* toggle verbose */
130                verbose = ! verbose;
131                break;
132
133            case '?':
134                showusage = TRUE;
135        }
136
137    if (showusage)
138    {
139        (void) fprintf(stderr, "%s", USAGE);
140        exit(1);
141    }
142
143    /*
144     *  traverse and process the arguments
145     */
146
147    for ( ; argv[optind]; optind++)
148        if (Failed(process(argv[optind])))
149            rc = FAILURE;
150
151    return rc;
152}
153
154
155/*
156 * process(arg)
157 */
158
159int
160process(char *arg)
161{
162  FILE   *in;
163  FILE   *out = (FILE *) 0;
164  char    outname[ MAX_PATH ];
165  char   *bptr;
166  char    buffer[ BUFFER_SIZE ];
167  int     length;
168  int     line_number;
169  int     rc = SUCCESS;  /* succeed by default */
170
171  in = fopen( arg, "r" );
172  if (!in)
173    error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg );
174
175  if ( !test_only ) {
176    sprintf( outname, "%s.eoltmp", arg );
177
178    out = fopen( outname, "w" );
179    if (!out)
180      error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg );
181  }
182
183  if ( verbose )
184    fprintf( stderr, "Processing %s\n", arg );
185
186  for ( line_number=1 ; ; line_number++ ) {
187    bptr = fgets( buffer, BUFFER_SIZE, in );
188    if (!bptr)
189      break;
190
191    /*
192     *  Don't count the carriage return.
193     */
194
195    length = strlen( buffer ) - 1;
196
197    if ( buffer[ length ] != '\n' )
198      error(ERR_ERRNO|ERR_FATAL, "Line %d too long in %s\n", line_number, arg);
199
200    while ( isspace( (int) buffer[ length ] ) )
201      buffer[ length-- ] = '\0';
202
203    if ( test_only ) {
204      fprintf( stderr, "%s\n", arg );
205      break;
206    }
207
208    fprintf( out, "%s\n", buffer );
209  }
210
211  fclose( in );
212  if ( !test_only ) {
213    fclose( out );
214    rename( outname, arg );
215  }
216  return rc;
217}
218
219/*
220 * error(errn, arglist)
221 *      report an error to stderr using printf(3) conventions.
222 *      Any output is preceded by '<progname>: '
223 *
224 * Uses ERR_FATAL bit to request exit(errn)
225 *      ERR_ABORT to request abort()
226 *      ERR_ERRNO to indicate use of errno instead of argument.
227 *
228 * If resulting 'errn' is non-zero, it is assumed to be an 'errno' and its
229 *      associated error message is appended to the output.
230 */
231
232/*VARARGS*/
233
234void
235error(int error_flag, ...)
236{
237    va_list arglist;
238    register char *format;
239    int local_errno;
240
241    extern int errno;
242
243    (void) fflush(stdout);          /* in case stdout/stderr same */
244
245    local_errno = error_flag & ~ERR_MASK;
246    if (error_flag & ERR_ERRNO)     /* use errno? */
247        local_errno = errno;
248
249    va_start(arglist, error_flag);
250    format = va_arg(arglist, char *);
251    (void) fprintf(stderr, "%s: ", progname);
252    (void) vfprintf(stderr, format, arglist);
253    va_end(arglist);
254
255    if (local_errno)
256      (void) fprintf(stderr, " (%s)\n", strerror(local_errno));
257    else
258      (void) fprintf(stderr, "\n");
259
260    (void) fflush(stderr);
261
262    if (error_flag & (ERR_FATAL | ERR_ABORT))
263    {
264        if (error_flag & ERR_FATAL)
265        {
266            error(0, "fatal error, exiting");
267            exit(local_errno ? local_errno : 1);
268        }
269        else
270        {
271            error(0, "fatal error, aborting");
272            abort();
273        }
274    }
275}
276
277long
278getparm(char *s,
279        long min,
280        long max,
281        char *msg)
282{
283    long val;
284
285    if ( ! strchr("0123456789-", *s))
286    {
287        error(ERR_FATAL, "'%s' is not a number", s);
288        return min;
289    }
290
291    val = strtol(s, (char **) NULL, 0);
292    if ((val < min) || (val > max))
293    {
294        if (min == max)
295            error(ERR_FATAL, "%s can only be %ld", s, min);
296        else
297            error(ERR_FATAL, "%s must be between %ld and %ld", msg, min, max);
298    }
299
300    return val;
301}
302
303
304/*
305 * Open()
306 *      Perform open(2), returning the file descriptor.  Prints
307 *      error message if open fails.
308 */
309
310int
311Open(char *file,
312     int oflag,
313     int mode)
314{
315    int O_fd;
316
317    if (Failed(O_fd = open(file, oflag, mode)))
318        error(
319          ERR_ERRNO | ERR_FATAL,
320          "open('%s', 0x%x, 0%o) failed", file, oflag, mode
321        );
322
323    return O_fd;
324}
325
326/*
327 * Read()
328 *      Perform read(2); prints error message if fails.
329 */
330
331int
332Read(int file,
333     char *buffer,
334     unsigned int count)
335{
336    int nbytes;
337
338    if (Failed(nbytes = read(file, buffer, count)))
339        error(
340          ERR_ERRNO | ERR_FATAL,
341          "read(%d, 0x%x, %d) failed", file, buffer, count
342        );
343
344    return nbytes;
345}
346
347/*
348 * Write()
349 *      Perform write(2); prints error message if fails.
350 */
351
352int
353Write(int file,
354      char *buffer,
355      unsigned int count)
356{
357    int nbytes;
358
359    if (Failed(nbytes = write(file, buffer, count)))
360        error(
361          ERR_ERRNO | ERR_FATAL,
362          "write(%d, 0x%x, %d) failed", file, buffer, count
363        );
364
365    return nbytes;
366}
Note: See TracBrowser for help on using the repository browser.