github-mirror/fish-shell
2
0
Fork 0
mirror of https://github.com/fish-shell/fish-shell.git synced 2024-11-22 13:18:59 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Improve error for redirections to invalid paths

Browse Source 
This finds the first broken component, to help people figure out where
they misspelt something.

E.g.

```
echo foo >/usr/lob/systemd/system/machines.target.wants/var-lib-machines.mount
```

will now show:

```
warning: Path '/usr/lob' does not exist
```

which would help with seeing that it should be "/usr/lib".
This commit is contained in:
Fabian Homborg 2021-11-19 21:11:28 +01:00
parent c82ce5132b
commit 8391f94081
5 changed files with 38 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/io.cpp
View File

@ -7,6 +7,7 @@
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <cstring>
@ -236,8 +237,32 @@ bool io_chain_t::append_from_specs(const redirection_spec_list_t &specs, const w
if ((oflags & O_EXCL) && (errno == EEXIST)) {
FLOGF(warning, NOCLOB_ERROR, spec.target.c_str());
} else {
FLOGF(warning, FILE_ERROR, spec.target.c_str());
if (should_flog(warning)) wperror(L"open");
if (should_flog(warning)) {
FLOGF(warning, FILE_ERROR, spec.target.c_str());
auto err = errno;
// If the error is that the file doesn't exist
// or there's a non-directory component,
// find the first problematic component for a better message.
if (err == ENOENT || err == ENOTDIR) {
auto dname = spec.target;
struct stat buf;
while (!dname.empty()) {
auto next = wdirname(dname);
if (!wstat(next, &buf)) {
if (!S_ISDIR(buf.st_mode)) {
FLOGF(warning, _(L"Path '%ls' is not a directory"), next.c_str());
} else {
FLOGF(warning, _(L"Path '%ls' does not exist"), dname.c_str());
}
break;
}
dname = next;
}
} else {
wperror(L"open");
}
}
}
// If opening a file fails, insert a closed FD instead of the file redirection
// and return false. This lets execution potentially recover and at least gives

4
tests/checks/exec.fish
View File

@ -1,12 +1,12 @@
#RUN: %fish %s
exec cat <nosuchfile
#CHECKERR: warning: An error occurred while redirecting file 'nosuchfile'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path 'nosuchfile' does not exist
echo "failed: $status"
#CHECK: failed: 1
not exec cat <nosuchfile
#CHECKERR: warning: An error occurred while redirecting file 'nosuchfile'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path 'nosuchfile' does not exist
echo "neg failed: $status"
#CHECK: neg failed: 0

8
tests/checks/pipestatus.fish
View File

@ -181,24 +181,24 @@ command true > /not/a/valid/path
echo $pipestatus : $status
#CHECK: 1 : 1
#CHECKERR: warning: An error occurred while redirecting file '/not/a/valid/path'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path '/not' does not exist
# Here the first process will launch, the second one will not.
command true | command true | command true > /not/a/valid/path
echo $pipestatus : $status
#CHECK: 0 0 1 : 1
#CHECKERR: warning: An error occurred while redirecting file '/not/a/valid/path'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path '/not' does not exist
# Pipeline breaks do not result in dangling jobs.
command true | command cat > /not/a/valid/path ; jobs
#CHECKERR: warning: An error occurred while redirecting file '/not/a/valid/path'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path '/not' does not exist
#CHECK: jobs: There are no jobs
# Regression test for #7038
cat /dev/zero | dd > /not/a/valid/path
echo 'Not hung'
#CHECKERR: warning: An error occurred while redirecting file '/not/a/valid/path'
#CHECKERR: open: No such file or directory
#CHECKERR: warning: Path '/not' does not exist
#CHECK: Not hung

4
tests/checks/redirect.fish
View File

@ -138,3 +138,7 @@ echo "/bin/echo pipe 12 <&12 12<&-" | source 12<&0
#CHECK: pipe 10
#CHECK: pipe 11
#CHECK: pipe 12
echo foo >/bin/echo/file
#CHECKERR: warning: An error occurred while redirecting file '/bin/echo/file'
#CHECKERR: warning: Path '/bin/echo' is not a directory

2
tests/pexpects/pipeline.py
View File

@ -37,6 +37,6 @@ expect_prompt("jobs: There are no jobs", unmatched="Should be no jobs")
# Check that this weird invalid double-redirection doesn't crash fish.
sendline("cat | cat </non/existent/file")
expect_str("warning: An error occurred while redirecting file '/non/existent/file'")
expect_str("open: No such file or directory")
expect_str("warning: Path '/non' does not exist")
send("\x04")
expect_prompt()