diff options
Diffstat (limited to 'src/pkg/exec/exec.go')
| -rw-r--r-- | src/pkg/exec/exec.go | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/pkg/exec/exec.go b/src/pkg/exec/exec.go index 958245832d..c6a5e06bb2 100644 --- a/src/pkg/exec/exec.go +++ b/src/pkg/exec/exec.go @@ -14,14 +14,15 @@ import ( "strconv" ) -// PathError records the name of a binary that was not -// found on the current $PATH. -type PathError struct { - Name string +// Error records the name of a binary that failed to be be executed +// and the reason it failed. +type Error struct { + Name string + Error os.Error } -func (e *PathError) String() string { - return "command " + strconv.Quote(e.Name) + " not found in $PATH" +func (e *Error) String() string { + return "exec: " + strconv.Quote(e.Name) + ": " + e.Error.String() } // Cmd represents an external command being prepared or run. @@ -32,8 +33,8 @@ type Cmd struct { // value. Path string - // Args is the command line arguments, including the command as Args[0]. - // If Args is empty, Run uses {Path}. + // Args holds command line arguments, including the command as Args[0]. + // If the Args field is empty or nil, Run uses {Path}. // // In typical use, both Path and Args are set by calling Command. Args []string @@ -44,7 +45,7 @@ type Cmd struct { // Dir specifies the working directory of the command. // If Dir is the empty string, Run runs the command in the - // process's current directory. + // calling process's current directory. Dir string // Stdin specifies the process's standard input. @@ -81,7 +82,7 @@ type Cmd struct { // resolve the path to a complete name if possible. Otherwise it uses // name directly. // -// The returned Cmd's Args is constructed from the command name +// The returned Cmd's Args field is constructed from the command name // followed by the elements of arg, so arg should not include the // command name itself. For example, Command("echo", "hello") func Command(name string, arg ...string) *Cmd { @@ -97,7 +98,7 @@ func Command(name string, arg ...string) *Cmd { } // interfaceEqual protects against panics from doing equality tests on -// two interface with non-comparable underlying types +// two interfaces with non-comparable underlying types func interfaceEqual(a, b interface{}) bool { defer func() { recover() |