posix: fix lseek to DATA or HOLE on directory

[szychows]

Implemented lseek to DATA or HOLE on directory.

---

This change is 

[codecov-io]

Codecov Report

Merging #305 into master will increase coverage by <.01%. The diff coverage is 86.04%.

@@            Coverage Diff            @@
##           master    #305      +/-   ##
=========================================
+ Coverage    79.3%   79.3%   +<.01%     
=========================================
  Files          81      81              
  Lines       12069   12092      +23     
  Branches     1629    1635       +6     
=========================================
+ Hits         9571    9590      +19     
- Misses       1893    1895       +2     
- Partials      605     607       +2

Impacted Files	Coverage Δ
tests/posix/rw/rw.cpp	92.87% <100%> (+0.06%)	:arrow_up:
src/libpmemfile-posix/lseek.c	89.51% <80.64%> (-1.97%)	:arrow_down:
src/libpmemfile-posix/utils.c	73.01% <0%> (-0.43%)	:arrow_down:
src/libpmemfile-posix/rename.c	91.9% <0%> (-0.04%)	:arrow_down:
src/libpmemfile-posix/file.c	65.93% <0%> (ø)	:arrow_up:
src/libpmemfile-posix/data.c	92.27% <0%> (+0.02%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update e1d95a6...3c5bb7e. Read the comment docs.

[krzycz]

Reviewed 2 of 2 files at r1. Review status: all files reviewed at latest revision, 2 unresolved discussions.

---

Comments from Reviewable

[szychows]

Review status: 0 of 2 files reviewed at latest revision, 2 unresolved discussions.

---

src/libpmemfile-posix/lseek.c, line 181 at r1 (raw file):

Previously, marcinslusarz (Marcin Ślusarz) wrote…

"else return -ENXIO;" just in case we'll support more file types

Done.

---

src/libpmemfile-posix/lseek.c, line 208 at r1 (raw file):

Previously, marcinslusarz (Marcin Ślusarz) wrote…

offset >= end lseek_end_directory returns offset *after* the last entry, so offset == end is above "file" size

Done.

---

Comments from Reviewable

[marcinslusarz]

src/libpmemfile-posix/lseek.c, line 181 at r1 (raw file):

Previously, marcinslusarz (Marcin Ślusarz) wrote…

"else return -ENXIO;" just in case we'll support more file types

well, please put new line after else...

---

Comments from Reviewable

[szychows]

Review status: 0 of 2 files reviewed at latest revision, 1 unresolved discussion.

---

src/libpmemfile-posix/lseek.c, line 181 at r1 (raw file):

Previously, marcinslusarz (Marcin Ślusarz) wrote…

well, please put new line after else...

Done.

---

Comments from Reviewable

[marcinslusarz]

---

Reviewed 2 of 2 files at r2. Review status: all files reviewed at latest revision, all discussions resolved.

---

Comments from Reviewable

[sarahjelinek]

---

Review status: :shipit: all files reviewed at latest revision, all discussions resolved, all commit checks successful.

---

Comments from Reviewable