aw/laymanshex
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apparently seek also can fail

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This commit is contained in:
gutmet 2020-04-27 00:18:47 +02:00
parent 24dad18c81
commit 8fe782253b
1 changed files with 6 additions and 4 deletions
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10
laymanshex.go
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@ -310,7 +310,7 @@ func setValues(descr fileDescription, binpath string, vals map[string]string) {
f, err := os.OpenFile(binpath, os.O_RDWR, 0666) f, err := os.OpenFile(binpath, os.O_RDWR, 0666)
optPanic("failed to write-open binary", err) optPanic("failed to write-open binary", err)
defer f.Close() defer f.Close()
for _, part := range descr.parts { for i, part := range descr.parts {
needSeek := true needSeek := true
if part.name != "" { if part.name != "" {
if val, ok := vals[part.name]; ok { if val, ok := vals[part.name]; ok {
@ -319,7 +319,8 @@ func setValues(descr fileDescription, binpath string, vals map[string]string) {
} }
} }
if needSeek { if needSeek {
f.Seek(part.handling.bytes, 1) _, err = f.Seek(part.handling.bytes, 1)
optPanic("set: could not advance in file (stuck at part "+strconv.Itoa(i)+"name: "+part.name+")", err)
} }
} }
} }
@ -329,9 +330,10 @@ func getValues(descr fileDescription, binpath string) map[string]string {
f, err := os.Open(binpath) f, err := os.Open(binpath)
defer f.Close() defer f.Close()
optPanic("failed to open binary", err) optPanic("failed to open binary", err)
for _, part := range descr.parts { for i, part := range descr.parts {
if part.name == "" { if part.name == "" {
f.Seek(part.handling.bytes, 1) _, err = f.Seek(part.handling.bytes, 1)
optPanic("get: could not advance in file (stuck at part "+strconv.Itoa(i)+"name: "+part.name+")", err)
} else { } else {
vals[part.name] = part.handling.readFrom(f, descr.byteOrder) vals[part.name] = part.handling.readFrom(f, descr.byteOrder)
} }