#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <stdbool.h>

#include "ioexact.h"

extern volatile sig_atomic_t sigint;

ssize_t read_exact(int fd, void *buf, size_t len, bool mayexit)
{
	ssize_t num = 0, written;

	while (len > 0 && !sigint) {
		if ((written = read(fd, buf, len)) < 0) {
			if (errno == EAGAIN && num > 0)
				continue;
			if (mayexit)
				return -1;
			else
				continue;
		}
		if (!written)
			return 0;

		len -= written;
		buf += written;
		num += written;
	}

	return num;
}

ssize_t write_exact(int fd, void *buf, size_t len, bool mayexit)
{
	ssize_t num = 0, written;

	while (len > 0 && !sigint) {
		if ((written = write(fd, buf, len)) < 0) {
			if (errno == EAGAIN && num > 0)
				continue;
			if (mayexit)
				return -1;
			else
				continue;
		}
		if (!written)
			return 0;

		len -= written;
		buf += written;
		num += written;
	}

	return num;
}
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<tr><th>author</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2016-08-04 11:02:38 +0200</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2016-08-04 11:02:38 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c'>f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=0d87d7ec22a0879d3926faa4f4f4412a5dee1fba'>0d87d7ec22a0879d3926faa4f4f4412a5dee1fba</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c&amp;id2=0d87d7ec22a0879d3926faa4f4f4412a5dee1fba'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=c369e0a1a8fa6ca80e6c37c8735d9427b623ae62'>c369e0a1a8fa6ca80e6c37c8735d9427b623ae62</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c&amp;id2=c369e0a1a8fa6ca80e6c37c8735d9427b623ae62'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'perf-core-for-mingo-20160803' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent</div><div class='commit-msg'>Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

New features:

- Add --sample-cpu to 'perf record', to explicitely ask for sampling
  the CPU (Jiri Olsa)

Fixes:

- Fix processing of multi byte chunks in objdump output, fixing
  disassemble processing for annotation on at least ARM64 (Jan Stancek)

- Use SyS_epoll_wait in a BPF 'perf test' entry instead of sys_epoll_wait, that
  is not present in the DWARF info in vmlinux files (Arnaldo Carvalho de Melo)

- Add -wno-shadow when processing files using perl headers, fixing
  the build on Fedora Rawhide and Arch Linux (Namhyung Kim)

Infrastructure changes:

- Annotate prep work to better catch and report errors related to
  using objdump to disassemble DSOs (Arnaldo Carvalho de Melo)

- Add 'alloc', 'scnprintf' and 'and' methods for bitmap processing (Jiri Olsa)

- Add nested output resorting callback in hists processing (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo &lt;acme@redhat.com&gt;
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=f282f7a0ecc3e0b8fd8532a6c3e9401534cb907c'>Diffstat</a></div><table summary='diffstat' class='diffstat'>