DeforaOS/utils
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Supporting cross-device file renaming

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This commit is contained in:
Pierre Pronchery 2007-07-08 11:14:34 +00:00
parent e4831defec
commit 67794dcc42
1 changed files with 21 additions and 5 deletions
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26
src/mv.c
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@ -35,6 +35,7 @@ typedef int Prefs;
static int _mv_error(char const * message, int ret);
static int _mv_single(Prefs * prefs, char const * src, char const * dst);
static int _mv_multiple(Prefs * prefs, int filec, char * const filev[]);
static int _mv(Prefs * prefs, int filec, char * filev[])
{
struct stat st;
@ -45,10 +46,8 @@ static int _mv(Prefs * prefs, int filec, char * filev[])
return _mv_error(filev[filec - 1], 1);
if(filec > 2)
{
fprintf(stderr, "%s%s%s", "mv: ", filev[filec - 1],
": Does not exist and more than two"
" operands were given\n");
return 1;
errno = ENOTDIR;
return _mv_error(filev[filec - 1], 1);
}
}
else if(S_ISDIR(st.st_mode))
@ -70,8 +69,25 @@ static int _mv_error(char const * message, int ret)
static int _mv_single(Prefs * prefs, char const * src, char const * dst)
{
if(rename(src, dst) != 0)
FILE * fp;
char buf[BUFSIZ];
size_t i;
if(rename(src, dst) == 0)
return 0;
if(errno != EXDEV)
return _mv_error(src, 1);
if(unlink(dst) != 0
&& errno != ENOENT)
return _mv_error(dst, 1);
if((fp = fopen(dst, "w+")) == NULL)
return _mv_error(dst, 1);
while((i = fread(buf, sizeof(char), sizeof(buf), fp)) > 0)
if(fwrite(buf, sizeof(char), i, fp) != i)
break;
if(fclose(fp) != 0
|| i != 0)
return _mv_error(dst, 1);
return 0;
}