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Introduce virDirOpen

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A helper that calls opendir and reports an error if it fails.
This commit is contained in:
Ján Tomko 2016-06-21 16:33:36 +02:00
parent bdb868101b
commit f0ced7086a
3 changed files with 32 additions and 4 deletions
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1
src/libvirt_private.syms
View File

@ -1495,6 +1495,7 @@ safezero;
virBuildPathInternal;
virDirClose;
virDirCreate;
virDirOpen;
virDirRead;
virFileAbsPath;
virFileAccessibleAs;

33
src/util/virfile.c
View File

@ -2732,6 +2732,31 @@ virFileRemove(const char *path,
}
#endif /* WIN32 */
static int
virDirOpenInternal(DIR **dirp, const char *name)
{
*dirp = opendir(name);
if (!*dirp) {
virReportSystemError(errno, _("cannot open directory '%s'"), name);
return -1;
}
return 1;
}
/**
* virDirOpen
* @dirp: directory stream
* @name: path of the directory
*
* Returns 1 on success.
* On failure, -1 is returned and an error is reported.
*/
int
virDirOpen(DIR **dirp, const char *name)
{
return virDirOpenInternal(dirp, name);
}
/**
* virDirRead:
* @dirp: directory to read
@ -2740,13 +2765,13 @@ virFileRemove(const char *path,
*
* Wrapper around readdir. Typical usage:
* struct dirent ent;
* int value;
* int rc;
* DIR *dir;
* if (!(dir = opendir(name)))
* if (virDirOpen(&dir, name) < 0)
* goto error;
* while ((value = virDirRead(dir, &ent, name)) > 0)
* while ((rc = virDirRead(dir, &ent, name)) > 0)
* process ent;
* if (value < 0)
* if (rc < 0)
* goto error;
*
* Returns -1 on error, with error already reported if @name was

2
src/util/virfile.h
View File

@ -230,6 +230,8 @@ enum {
};
int virDirCreate(const char *path, mode_t mode, uid_t uid, gid_t gid,
unsigned int flags) ATTRIBUTE_RETURN_CHECK;
int virDirOpen(DIR **dirp, const char *dirname)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
int virDirRead(DIR *dirp, struct dirent **ent, const char *dirname)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
void virDirClose(DIR **dirp)