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The functions involved were called only once.
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likely behaves very badly when given too many files or delimiters.
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Add two less-frequently used flags for modinfo; -b specifies an alternate
root and -k replaces the output of uname -r.
Additionally, avoid a potential overflow in sprintf,
and correct an inverted test.
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Don't use xopen() if you want to iterate through multiple files.
Don't abort if unable to open the file, but return error if it can't map it.
(And leak the filehandle.) All modinfo_file() actually uses is the filename,
no reason to go through dirtree() for that. Nothing is actually _checking_ the
return value of modinfo_file(). Avoid global data outside of toy_union.
Make sure extension is at end of file (we can add support for more extensions
later).
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use of a path to a module (*.ko.xz and similar included, but not supported).
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Move ftname out of GLOBALS into 'F' handler. Make 'i' zero pad output (zeroes
in middle of ID can get lost).
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lib: rename format_mode() to mode_to_string() (echoing string_to_mode), make it
take a normal char * argument.
stat: collapse big switch/case statements that only have one line each
into if/else staircase (much fewer lines of code). Remove return type
(other stat implementations print ? for unknown escapes, so do that here).
Inline do_stat() and do_statfs(). Set default string in normal local
variable "format". Remove unnecessary struct d. Restructure stat logic to
"if (flagf && !statfs()) else if (!flagf && !stat()) else perror_msg();"
Teach %N to add -> symlink. Judicious use of putchar() instead of xputc to
let FILE * do its job collating output.
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Put global stat info in a union so we don't have to malloc it and thus don't need an explicit size tracked in main(). Make date_stat_format() take a timespec and take advantage of stat having an embedded timespec (nanosecond printing), typecast the long long prints for XYZ because on some 32 bit platforms it's an int.
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From the mailing list:
Ok, first thing: clean up the help text. I realize what's there is copied verbatim from the man page, but that man page sucks. ("modification time" vs "change time"?) Took a bit of finagling to fit it in 80x24, but just made it.
GLOBALS() indent was still tab, change to two spaces. And I tend to put a blank line between options lib/args.c automatically fills out and normal globals.
We never do anything with date_stat_format() but immediately print it, might as well make the function do it.
The types[] array in do_stat() is a rough edge. Hmmm... there's no else case that sets the type in case it was unknown (such as 0). In theory, this never happens. In practice it means I can cheat slightly, given this observation:
$ find linux -name stat.h | xargs grep 'S_IF[A-Z]*[ \t]'
linux/include/uapi/linux/stat.h:#define S_IFMT 00170000
linux/include/uapi/linux/stat.h:#define S_IFSOCK 0140000
linux/include/uapi/linux/stat.h:#define S_IFLNK 0120000
linux/include/uapi/linux/stat.h:#define S_IFREG 0100000
linux/include/uapi/linux/stat.h:#define S_IFBLK 0060000
linux/include/uapi/linux/stat.h:#define S_IFDIR 0040000
linux/include/uapi/linux/stat.h:#define S_IFCHR 0020000
linux/include/uapi/linux/stat.h:#define S_IFIFO 0010000
I.E. the only place the I_IFBLAH constants occur a stat.h header in current linux code is in the generic stuff, it doesn't vary per target. (The access permission bits are actually subtly standardized in posix due to the command line arguments to chmod, although I'm sure cygwin finds a way to break. But the type fields, not so much. But linux has to be binary compatible with itself foreverish, and that's all I really care about.)
So, we have ALMOST have this going by twos, except there's no 8 and there is a 1. so let's make the 1 the default, feed a blank string into the 8... No, duh: octal. So it's actually 2, 4, 6, 8, 10, 12. So make the loop look like:
filetype = statf->st_mode & S_IFMT;
TT.ftname = types;
for (i = 1; filetype != (i*8192) && i < 7; i++)
TT.ftname += strlen(TT.ftname)+1;
Yes that's linux-specific, and I think I'm ok with that.
Printing all zeroes and pretending that's nanosecond resolution... either support it or don't. Let's see, supporting it is stat->st_atim.tv_nsec and similar... no mention of nanoseconds in strftime() (et tu, posix2008?) so pass it as a second argument and append it by hand... (Need to test that against musl...)
When we hit an unknown type in print_it() we print the literal character, which is right for %% but what about an unknown option?
$ stat -c %q /
?
Eh, I guess that's a "don't care". It didn't die with an error, that's the important thing.
I have a horrible idea for compressing the switch/case blocks, but should probably check this in and get some sleep for right now...
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set_hw_address().
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of the flags/options, but does the raw output.
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and move xsocket() to it.
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module names, so modinfo should too. Made it use mmap() while I was there, and some cosmetic refactoring.
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