60{
61 static const size_t segSize = 1024*1024;
62 class ioFD
63 {public:
64 int FD;
65 ioFD(int fd=-1) : FD(fd) {}
66 ~ioFD() {
if (FD >= 0)
close(FD);}
67 } In, Out(outFD);
68
69 struct utimbuf tBuff;
70 struct stat buf, bufO, bufSL;
71 char *inBuff, *bP;
72 off_t Offset=0, fileSize;
73 size_t ioSize, copySize;
74 ssize_t rLen;
75 int rc;
76
77
78
79 if ((In.FD =
open(inFn, O_RDONLY)) < 0)
81
82
83
85 copySize = fileSize = buf.st_size;
86
87
88
89
90
92 if (buf.st_dev == bufO.st_dev)
93 {char lnkBuff[1024+8]; const char *srcFn = inFn; int n;
94 if (lstat(inFn, &bufSL))
return -
OssEroute.
Emsg(
"Copy",errno,
"lstat",inFn);
95 if ((bufSL.st_mode & S_IFMT) == S_IFLNK)
96 {if ((n = readlink(inFn, lnkBuff, sizeof(lnkBuff)-1)) < 0)
98 lnkBuff[n] = '\0'; srcFn = lnkBuff;
99 }
101 if (link(srcFn,outFn))
return -
OssEroute.
Emsg(
"Copy",errno,
"link",outFn);
102 return fileSize;
103 }
104
105
106
107 ioSize = (fileSize < (off_t)segSize ? fileSize : segSize);
108 while(copySize)
109 {if ((inBuff = (char *)mmap(0, ioSize, PROT_READ,
110#if defined(__FreeBSD__)
111 MAP_RESERVED0040|MAP_PRIVATE, In.FD, Offset)) == MAP_FAILED)
112#elif defined(__GNU__)
113 MAP_PRIVATE, In.FD, Offset)) == MAP_FAILED)
114#else
115 MAP_NORESERVE|MAP_PRIVATE, In.FD, Offset)) == MAP_FAILED)
116#endif
118 if (Write(outFn, Out.FD, inBuff, ioSize, Offset) < 0) break;
119 copySize -= ioSize; Offset += ioSize;
120 if (munmap(inBuff, ioSize) < 0)
121 {
OssEroute.
Emsg(
"Copy", errno,
"unmap memory for", inFn);
break;}
122 if (copySize < segSize) ioSize = copySize;
123 }
124
125
126
127 if (copySize)
128 { if ((off_t)copySize != fileSize) return -EIO;
129
130 OssEroute.
Emsg(
"Copy",
"Trying traditional copy for", inFn,
"...");
131 char ioBuff[segSize];
132 off_t rdSize, wrSize = segSize, inOff=0;
133 while(copySize)
134 {if (copySize < segSize) rdSize = wrSize = copySize;
135 else rdSize = segSize;
136 bP = ioBuff;
137 while(rdSize)
138 {
do {rLen =
pread(In.FD, bP, rdSize, inOff);}
139 while(rLen < 0 && errno == EINTR);
141 rLen ? errno : ECANCELED, "read", inFn);
142 bP += rLen; rdSize -= rLen; inOff += rLen;
143 }
144 if ((rc = Write(outFn, Out.FD, ioBuff, wrSize, Offset)) < 0) return rc;
145 copySize -= wrSize; Offset += wrSize;
146 }
147 }
148
149
150
152
153
154
155 tBuff.actime = buf.st_atime;
156 tBuff.modtime= buf.st_mtime;
157 if (utime(outFn, &tBuff))
159
160
161
162 return fileSize;
163}
#define pread(a, b, c, d)
static off_t Copy(const char *inFn, const char *outFn, int outFD)
int Emsg(const char *esfx, int ecode, const char *text1, const char *text2=0)