I put in the following archive a copy of my '/usr/bin/fromdos' program
together with a small DOS (CR-LF) text file.
What happens to me in 2.1.56 (I don't count 2.1.57 because it is a
total disaster, and I didn't notice this bug before 2.1.56) is that
the result is correct if the files are on an ext2 FS, while on a
MSDOS (==VFAT) FS the result is always a file of zero length.
You can imagine how happy I was discovering that djgpp under dosemu
destroyed my files ;-) .. well, I found a test case, and it's a kernel
bug, probably with unlink or rename.
Please have a look at it.
begin 644 dosbug.tar.gz
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!````
`
end
Trace follows.
execve("/temp/fromdos", ["/temp/fromdos", "sol.ini"], [/* 47 vars */]) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40007000
mprotect(0x40000000, 20682, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
mprotect(0x8048000, 6819, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
stat("/etc/ld.so.cache", {st_mode=S_IFREG|0644, st_size=10274, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
mmap(0, 10274, PROT_READ, MAP_SHARED, 3, 0) = 0x40008000
close(3) = 0
stat("/etc/ld.so.preload", 0xbffff9d0) = -1 ENOENT (No such file or directory)
open("/usr/X11R6/lib/libc.so.5", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.5", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 770048, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4000b000
mmap(0x4000b000, 537343, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x4000b000
mmap(0x4008f000, 19948, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x83000) = 0x4008f000
mmap(0x40094000, 207064, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40094000
close(3) = 0
mprotect(0x4000b000, 537343, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
munmap(0x40008000, 10274) = 0
mprotect(0x8048000, 6819, PROT_READ|PROT_EXEC) = 0
mprotect(0x4000b000, 537343, PROT_READ|PROT_EXEC) = 0
mprotect(0x40000000, 20682, PROT_READ|PROT_EXEC) = 0
personality(PER_LINUX) = 0
geteuid() = 0
getuid() = 0
getgid() = 0
getegid() = 0
sigaction(SIGINT, {0x8048df0, [], SA_INTERRUPT|SA_NOMASK|SA_ONESHOT}, {SIG_DFL}) = 0
sigaction(SIGTERM, {0x8048df0, [], SA_INTERRUPT|SA_NOMASK|SA_ONESHOT}, {SIG_DFL}) = 0
brk(0x804ad2c) = 0x804ad2c
brk(0x804b000) = 0x804b000
stat("/etc/locale/C/libc.cat", 0xbffff54c) = -1 ENOENT (No such file or directory)
stat("/usr/share/locale/C/libc.cat", 0xbffff54c) = -1 ENOENT (No such file or directory)
stat("/usr/share/locale/libc/C", 0xbffff54c) = -1 ENOENT (No such file or directory)
stat("/usr/share/locale/C/libc.cat", 0xbffff54c) = -1 ENOENT (No such file or directory)
stat("/usr/local/share/locale/C/libc.cat", 0xbffff54c) = -1 ENOENT (No such file or directory)
stat("sol.ini", {st_mode=S_IFREG|0644, st_size=33, ...}) = 0
getpid() = 133
stat("./a00133", 0xbffff9b4) = -1 ENOENT (No such file or directory)
open("sol.ini", O_RDONLY) = 3
open("./a00133", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
brk(0x8050000) = 0x8050000
brk(0x8055000) = 0x8055000
read(3, "[Solitaire]\r\nOptions=32\r\nBac"..., 16384) = 33
read(3, "", 16384) = 0
close(3) = 0
write(4, "[Solitaire]\nOptions=32\nBack=6\n"..., 30) = 30
close(4) = 0
unlink("sol.ini") = 0
rename("./a00133", "sol.ini") = 0
chmod("sol.ini", 0100644) = 0
_exit(0) = ?
Alberto