As noted by Pradeep (and I tested also the code on OpenBSD):
The man page for fts library call states both the following:
short fts_pathlen; /* strlen(fts_path) */
fts_pathlen The length of the string referenced by fts_path
However, for the structures returned from fts_children() function,
fts_pathlen is strlen(fts_path) + strlen(fts_name), which contradicts
the man page statement. So I believe that there is either a bug in the
man page or the fts_children() library call.
The following program can be used for verification:
int main() {
struct passwd *pwd_entry = getpwuid(getuid());
char *paths[] = {pwd_entry->pw_dir, NULL};
FTS* fts = fts_open(paths, FTS_LOGICAL, NULL);
FTSENT* ftsent = fts_read(fts);
FTSENT* child = fts_children(fts, 0);
while (child != NULL) {
printf("\n %s %s %d %lu", child->fts_path, child->fts_name,
child->fts_pathlen, strlen(child->fts_path));
child = child->fts_link;
}
return 0;
}
Reported-by: Pradeep Kumar <pradeepsixer@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Compile warning with glibc 2.25:
warning: In the GNU C Library, "makedev" is defined by
<sys/sysmacros.h>. For historical compatibility, it is
currently defined by <sys/types.h> as well, but we plan to
remove this soon. To use "makedev", include <sys/sysmacros.h>
directly. If you did not intend to use a system-defined macro
"makedev", you should undefine it after including
<sys/types.h>.
Background: glibc commit dbab6577c6684c62bd2521c1c29dc25c3cac966f
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Recast the advice against manually declaring 'errno' to
a more modern perspective. It's 13 years since the original
text was added, and even then it was describing old behavior.
Cast the description to be about behavior further away in
time, and note more clearly that manual declaration will
cause problems with modern C libraries.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Added after a patch from Wesley Aptekar-Cassels that proposed
to add error numbers to the text.
Reported-by: Wesley Aptekar-Cassels <w.aptekar@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
POSIX.1-2008 noted the explicitly the change (to align with
the C standards) that error numbers are positive, rather
than nonzero.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Restructure the text and add some subheadings for better
readability. No (intentional) content changes.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Based on comparing the filtered content of the two main
kernel errno files:
cat include/uapi/asm-generic/errno.h \
include/uapi/asm-generic/errno-base.h | grep define | \
grep -v 'define _' | awk '{print $2}' | sort -u
to see what is absent from this page, and used in either kernel
or glibc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Document the glibc 2.24 change that dropped CWD from the default
search path employed by execlp(), execvp() and execvpe() when
PATH is not defined.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
I'm not sure what compiler is referred to by "pc(1)",
but "dnf whatprovides" and web searches turn up no
mention of a compiler by that name.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk