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qemu-config: add error propagation to qemu_config_parse

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This enables some simplification of vl.c via error_fatal, and improves
error messages.  Before:

  $ ./qemu-system-x86_64 -readconfig .
  qemu-system-x86_64: error reading file
  qemu-system-x86_64: -readconfig .: read config .: Invalid argument
  $ /usr/libexec/qemu-kvm -readconfig foo
  qemu-kvm: -readconfig foo: read config foo: No such file or directory

After:

  $ ./qemu-system-x86_64 -readconfig .
  qemu-system-x86_64: -readconfig .: Cannot read config file: Is a directory
  $ ./qemu-system-x86_64 -readconfig foo
  qemu-system-x86_64: -readconfig foo: Could not open 'foo': No such file or directory

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210226170816.231173-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-02-26 12:08:16 -05:00
parent e20e182ea0
commit f7544edcd3
4 changed files with 27 additions and 33 deletions
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5
include/qemu/config-file.h
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@ -11,9 +11,10 @@ void qemu_add_drive_opts(QemuOptsList *list);
int qemu_global_option(const char *str);
void qemu_config_write(FILE *fp);
int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname);
int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname,
Error **errp);
int qemu_read_config_file(const char *filename);
int qemu_read_config_file(const char *filename, Error **errp);
/* Parse QDict options as a replacement for a config file (allowing multiple
enumerated (0..(n-1)) configuration "sections") */