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wc: fix a hang gue to isprint(EOF)

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The new isprint replacement macro returns TRUE for isprint(EOF), so the
read loop never returns. Moved the check for EOF immediately after the
read.

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Dan Fandrich
2009-11-18 10:48:09 +01:00
committed by Denys Vlasenko
parent 995f15452a
commit 5b0a7f1a6e
1 changed files with 20 additions and 16 deletions
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36
coreutils/wc.c
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@@ -68,19 +68,14 @@ enum {
int wc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int wc_main(int argc UNUSED_PARAM, char **argv)
{
FILE *fp;
const char *s, *arg;
const char *arg;
const char *start_fmt = " %9"COUNT_FMT + 1;
const char *fname_fmt = " %s\n";
COUNT_T *pcounts;
COUNT_T counts[4];
COUNT_T totals[4];
unsigned linepos;
unsigned u;
int num_files = 0;
int c;
int num_files;
smallint status = EXIT_SUCCESS;
smallint in_word;
unsigned print_type;
print_type = getopt32(argv, "lwcL");
@@ -101,7 +96,14 @@ int wc_main(int argc UNUSED_PARAM, char **argv)
pcounts = counts;
num_files = 0;
while ((arg = *argv++) != 0) {
FILE *fp;
const char *s;
unsigned u;
unsigned linepos;
smallint in_word;
++num_files;
fp = fopen_or_warn_stdin(arg);
if (!fp) {
@@ -114,10 +116,19 @@ int wc_main(int argc UNUSED_PARAM, char **argv)
in_word = 0;
do {
int c;
/* Our -w doesn't match GNU wc exactly... oh well */
++counts[WC_CHARS];
c = getc(fp);
if (c == EOF) {
if (ferror(fp)) {
bb_simple_perror_msg(arg);
status = EXIT_FAILURE;
}
--counts[WC_CHARS];
goto DO_EOF; /* Treat an EOF as '\r'. */
}
if (isprint(c)) {
++linepos;
if (!isspace(c)) {
@@ -134,7 +145,7 @@ int wc_main(int argc UNUSED_PARAM, char **argv)
if (c == '\t') {
linepos = (linepos | 7) + 1;
} else { /* '\n', '\r', '\f', or '\v' */
DO_EOF:
DO_EOF:
if (linepos > counts[WC_LENGTH]) {
counts[WC_LENGTH] = linepos;
}
@@ -145,13 +156,6 @@ int wc_main(int argc UNUSED_PARAM, char **argv)
linepos = 0;
}
}
} else if (c == EOF) {
if (ferror(fp)) {
bb_simple_perror_msg(arg);
status = EXIT_FAILURE;
}
--counts[WC_CHARS];
goto DO_EOF; /* Treat an EOF as '\r'. */
} else {
continue;
}
@@ -170,7 +174,7 @@ int wc_main(int argc UNUSED_PARAM, char **argv)
fclose_if_not_stdin(fp);
OUTPUT:
OUTPUT:
/* coreutils wc tries hard to print pretty columns
* (saves results for all files, find max col len etc...)
* we won't try that hard, it will bloat us too much */