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| author | maxim <maxim@FreeBSD.org> | 2006-10-07 12:11:21 +0000 |
|---|---|---|
| committer | maxim <maxim@FreeBSD.org> | 2006-10-07 12:11:21 +0000 |
| commit | a9cb1cf4c1c019322d972507dbca9d570755222f (patch) | |
| tree | e0f349296877452b899ef820ccd32f94381e0a3f /bin/cp | |
| parent | a906aad1ec63043c546ed2bb9562c084e15ac66a (diff) | |
| download | FreeBSD-src-a9cb1cf4c1c019322d972507dbca9d570755222f.zip FreeBSD-src-a9cb1cf4c1c019322d972507dbca9d570755222f.tar.gz | |
o Avoid division by zero.
o Place error checking code near to the syscall.
Submitted by: bde
Diffstat (limited to 'bin/cp')
| -rw-r--r-- | bin/cp/utils.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/bin/cp/utils.c b/bin/cp/utils.c index 64ebc52..5286c74 100644 --- a/bin/cp/utils.c +++ b/bin/cp/utils.c @@ -54,7 +54,8 @@ __FBSDID("$FreeBSD$"); #include <unistd.h> #include "extern.h" -#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y)) + +#define cp_pct(x, y) ((y == 0) ? 0 : (int)(100.0 * (x) / (y))) int copy_file(const FTSENT *entp, int dne) @@ -149,6 +150,8 @@ copy_file(const FTSENT *entp, int dne) for (bufp = p, wresid = fs->st_size; ; bufp += wcount, wresid -= (size_t)wcount) { wcount = write(to_fd, bufp, wresid); + if (wcount <= 0) + break; wtotal += wcount; if (info) { info = 0; @@ -158,7 +161,7 @@ copy_file(const FTSENT *entp, int dne) cp_pct(wtotal, fs->st_size)); } - if (wcount >= (ssize_t)wresid || wcount <= 0) + if (wcount >= (ssize_t)wresid) break; } if (wcount != (ssize_t)wresid) { @@ -179,6 +182,8 @@ copy_file(const FTSENT *entp, int dne) for (bufp = buf, wresid = rcount; ; bufp += wcount, wresid -= wcount) { wcount = write(to_fd, bufp, wresid); + if (wcount <= 0) + break; wtotal += wcount; if (info) { info = 0; @@ -188,7 +193,7 @@ copy_file(const FTSENT *entp, int dne) cp_pct(wtotal, fs->st_size)); } - if (wcount >= (ssize_t)wresid || wcount <= 0) + if (wcount >= (ssize_t)wresid) break; } if (wcount != (ssize_t)wresid) { |
