diff options
Diffstat (limited to 'wait_for_sysfs.c')
| -rw-r--r-- | wait_for_sysfs.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/wait_for_sysfs.c b/wait_for_sysfs.c index 72368efac8..d775eb1c95 100644 --- a/wait_for_sysfs.c +++ b/wait_for_sysfs.c @@ -6,6 +6,7 @@ * directories and then just exit. * * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> + * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -35,6 +36,10 @@ #include "udev_version.h" #include "libsysfs/sysfs/libsysfs.h" +#ifndef FILENAME_MAX +#define FILENAME_MAX 4096 +#endif + #ifdef LOG unsigned char logname[LOGNAME_SIZE]; void log_message(int level, const char *format, ...) @@ -73,6 +78,7 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev }; struct class_file *classfile; const char *file = "dev"; + char filename[FILENAME_MAX]; int loop; /* look if we want to look for another file instead of "dev" */ @@ -87,13 +93,21 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev } } - dbg("looking at class '%s' for specific file '%s'", class_dev->classname, class_dev->path); + strcpy(filename, class_dev->path); + strcat(filename, "/"); + strcat(filename, file); + dbg("looking at class '%s' for specific file '%s' with full name %s", class_dev->classname, class_dev->path, filename); loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND; while (--loop) { struct stat stats; - if (stat(class_dev->path, &stats) == 0) { + if (stat(class_dev->path, &stats) == -1) { + dbg("oops, the directory '%s' just disappeared.", class_dev->path); + return -ENODEV; + } + + if (stat(filename, &stats) == 0) { dbg("class '%s' specific file '%s' found", class_dev->classname, file); return 0; } @@ -102,7 +116,7 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev } dbg("error: getting class '%s' specific file '%s'", class_dev->classname, file); - return -1; + return -ENOENT; } /* check if we need to wait for a physical device */ @@ -284,6 +298,7 @@ int main(int argc, char *argv[], char *envp[]) struct sysfs_class_device *class_dev_parent; struct sysfs_device *device_dev = NULL; int loop; + int retval; int rc = 0; init_logging("wait_for_sysfs"); @@ -335,7 +350,10 @@ int main(int argc, char *argv[], char *envp[]) } dbg("class_device opened '%s'", filename); - if (wait_for_class_device_attributes(class_dev) != 0) { + retval = wait_for_class_device_attributes(class_dev); + if (retval == -ENODEV) + goto exit_class; + if (retval != 0) { rc = 4; goto exit_class; } |