full-write.c #1

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/full-write.c

Line

Source

Count

/* An interface to read and write that retries (if necessary) until complete.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>. */

#include <config.h>

/* Specification. */

#ifdef FULL_READ

# include "full-read.h"

#else

# include "full-write.h"

#endif

#include <errno.h>

#ifdef FULL_READ

# include "safe-read.h"

# define safe_rw safe_read

# define full_rw full_read

# undef const

# define const /* empty */

#else

# include "safe-write.h"

# define safe_rw safe_write

# define full_rw full_write

#endif

#ifdef FULL_READ

/* Set errno to zero upon EOF. */

# define ZERO_BYTE_TRANSFER_ERRNO 0

#else

/* Some buggy drivers return 0 when one tries to write beyond

a device's end. (Example: Linux 1.2.13 on /dev/fd0.)

Set errno to ENOSPC so they get a sensible diagnostic. */

# define ZERO_BYTE_TRANSFER_ERRNO ENOSPC

#endif

/* Write(read) COUNT bytes at BUF to(from) descriptor FD, retrying if

interrupted or if a partial write(read) occurs. Return the number

of bytes transferred.

When writing, set errno if fewer than COUNT bytes are written.

When reading, if fewer than COUNT bytes are read, you must examine

errno to distinguish failure from EOF (errno == 0). */

size_t

full_rw (int fd, const void *buf, size_t count)

{

size_t total = 0;

const char *ptr = (const char *) buf;

while (count > 0)

count > 0	Description
TRUE	evaluated 38821 times by 8 tests Evaluated by: cat cp factor ginstall head mv split yes
FALSE	evaluated 36861 times by 8 tests Evaluated by: cat cp factor ginstall head mv split yes

36861-38821

{

size_t n_rw = safe_rw (fd, ptr, count);

if (n_rw == (size_t) -1)

n_rw == (size_t) -1	Description
TRUE	evaluated 102 times by 3 tests Evaluated by: cat split yes
FALSE	evaluated 38716 times by 8 tests Evaluated by: cat cp factor ginstall head mv split yes

102-38716

break;

executed 102 times by 3 tests: break;

Executed by:

cat
split
yes

102

if (n_rw == 0)

n_rw == 0	Description
TRUE	evaluated 970 times by 2 tests Evaluated by: ginstall head
FALSE	evaluated 37746 times by 8 tests Evaluated by: cat cp factor ginstall head mv split yes

970-37746

{

errno = ZERO_BYTE_TRANSFER_ERRNO;

break;

executed 970 times by 2 tests: break;

Executed by:

ginstall
head

970

}

total += n_rw;

ptr += n_rw;

count -= n_rw;

}

executed 37746 times by 8 tests: end of block

Executed by:

cat
cp
factor
ginstall
head
mv
split
yes

37746

return total;

executed 37933 times by 8 tests: return total;

Executed by:

cat
cp
factor
ginstall
head
mv
split
yes

37933

}

Generated by Squish Coco 4.1.2