Bruce Evans 1df595f25d Fixed searching of $PATH in execvp(). Do what sh(1) should do according ... to POSIX.2. In particular: - don't retry for ETXTBSY. This matches what sh(1) does. The retry code was broken anyway. It only slept for several seconds for the first few retries. Then it retried without sleeping. - don't abort the search for errors related to the path prefix, in particular for ENAMETOOLONG, ENOTDIR, ELOOP. This fixes PR1487. sh(1) gets this wrong in the opposite direction by never aborting the search. - don't confuse EACCES for errors related to the path prefix with EACCES for errors related to the file. sh(1) gets this wrong. - don't return a stale errno when the search terminates normally without finding anything. The errno for the last unsuccessful execve() was usually returned. This gave too much precedence to pathologies in the last component of $PATH. This bug is irrelevant for sh(1). The implementation still uses the optimization/race-inhibitor of trying to execve() things first. POSIX.2 seems to require looking at file permissions using stat(). We now use stat() after execve() if execve() fails with an ambiguous error. Trying execve() first may actually be a pessimization, since failing execve()s are fundamentally a little slower than stat(), and are significantly slower when a file is found but has unsuitable permissions or points to an unsuitable interpreter. PR: 1487		1997-10-14 07:23:16 +00:00
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amd64	Changed all paths to be relative to src/lib instead of src/lib/libc	1997-05-03 03:50:06 +00:00
compat-43	kill the undead	1997-07-13 14:26:00 +00:00
db	Submitted by: Sin'ichiro MIYATANI / Phase One, Inc <siu@phaseone.co.jp>	1997-09-24 20:38:12 +00:00
gen	Fixed searching of $PATH in execvp(). Do what sh(1) should do according	1997-10-14 07:23:16 +00:00
gmon	Changed all paths to be relative to src/lib instead of src/lib/libc	1997-05-03 03:50:06 +00:00
i386	kill the undead	1997-07-13 14:26:00 +00:00
locale	Use revived __maskrune for digittoint	1997-09-27 04:34:35 +00:00
net	Some adjustments for the resolver use of poll(). For some reason I thought	1997-09-16 06:03:54 +00:00
nls	Plug even more failure memory leaks	1997-05-10 04:40:40 +00:00
quad	Changed all paths to be relative to src/lib instead of src/lib/libc	1997-05-03 03:50:06 +00:00
regex	Changed all paths to be relative to src/lib instead of src/lib/libc	1997-05-03 03:50:06 +00:00
rpc	Make selection logic more strict. Only select AF_INET loopback interfaces	1997-09-21 23:04:51 +00:00
stdio	Rework previous commit.. I was confused by the number of diffs in the PR	1997-07-06 08:42:37 +00:00
stdlib	environmental -> environment.	1997-09-18 06:55:21 +00:00
stdtime	Merged in better support of ISO 8601 from elsie.nci.nih.gov.	1997-10-03 19:06:57 +00:00
string	Added bounds checking to the example after chasing down someone's	1997-07-26 00:47:06 +00:00
sys	Add the AIO/LIO to libc. They aren't fully done yet, but have been in the	1997-10-10 05:48:16 +00:00
xdr	Restore Id.	1997-05-28 16:29:12 +00:00
yp	Use ${DESTDIR} correctly in front of absolute paths.	1997-05-23 08:24:00 +00:00
Makefile	Use ${DESTDIR} correctly in front of absolute paths.	1997-05-23 08:24:00 +00:00
Makefile.inc	Changed all paths to be relative to src/lib instead of src/lib/libc	1997-05-03 03:50:06 +00:00