From: Chris Allegretta Date: Tue, 20 Jan 2015 06:15:34 +0000 (+0000) Subject: Take 2 at file locking fixes. New args to close_buffer() and X-Git-Tag: v2.3.99pre2~8 X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=5b1fb56a8f8f7b9ea19000079bd38a04ac982265;p=nano.git Take 2 at file locking fixes. New args to close_buffer() and switch_to_prevnext_buffer() to support message passthrough when trying to lock files using multibuffer. git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5105 35c25a1d-7b9e-4130-9fde-d3aeb78583b8 --- diff --git a/src/files.c b/src/files.c index 97494bc0..3ac53d81 100644 --- a/src/files.c +++ b/src/files.c @@ -126,6 +126,7 @@ int write_lockfile(const char *lockfilename, const char *origfilename, bool modi pid_t mypid; uid_t myuid; struct passwd *mypwuid; + struct stat fileinfo; char *lockdata = charalloc(1024); char myhostname[32]; ssize_t lockdatalen = 1024; @@ -145,8 +146,10 @@ int write_lockfile(const char *lockfilename, const char *origfilename, bool modi return -1; } - if (delete_lockfile(lockfilename) < 0) - return -1; + /* Check if the lock exists before we try to delete it...*/ + if (stat(lockfilename, &fileinfo) != -1) + if (delete_lockfile(lockfilename) < 0) + return -1; if (ISSET(INSECURE_BACKUP)) cflags = O_WRONLY | O_CREAT | O_APPEND; @@ -156,11 +159,13 @@ int write_lockfile(const char *lockfilename, const char *origfilename, bool modi fd = open(lockfilename, cflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); - /* Maybe we just don't have write access. Don't stop us from - * opening the file at all, just don't set the lock_filename and - * return success. */ - if (fd < 0 && errno == EACCES) - return 1; + /* Maybe we just don't have write access. Print an error message + and continue. */ + if (fd < 0) { + statusbar(_("Error writing lock file %s: %s"), lockfilename, + strerror(errno)); + return 0; + } /* Now we've got a safe file stream. If the previous open() call * failed, this will return NULL. */ @@ -229,8 +234,8 @@ int write_lockfile(const char *lockfilename, const char *origfilename, bool modi int delete_lockfile(const char *lockfilename) { if (unlink(lockfilename) < 0 && errno != ENOENT) { - statusbar(_("Error deleting lock file %s: %s"), lockfilename, - strerror(errno)); + statusbar(_("Error deleting lock file %s: %s"), lockfilename, + strerror(errno)); return -1; } return 1; @@ -314,6 +319,7 @@ int do_lockfile(const char *filename) * necessary, and then open and read the file, if applicable. */ void open_buffer(const char *filename, bool undoable) { + bool quiet = FALSE; bool new_buffer = (openfile == NULL #ifndef DISABLE_MULTIBUFFER || ISSET(MULTIBUFFER) @@ -344,12 +350,14 @@ void open_buffer(const char *filename, bool undoable) if (ISSET(LOCKING) && filename[0] != '\0') { int lockstatus = do_lockfile(filename); if (lockstatus < 0) { +#ifndef DISABLE_MULTIBUFFER if (openfile->next) { - close_buffer(); - statusbar(_("Cancelled")); + close_buffer(TRUE); return; - } else - filename = ""; + } +#endif + } else if (lockstatus == 0) { + quiet = TRUE; } } #endif @@ -359,7 +367,7 @@ void open_buffer(const char *filename, bool undoable) /* If the filename isn't blank, and we are not in NOREAD_MODE, * open the file. Otherwise, treat it as a new file. */ rc = (filename[0] != '\0' && !ISSET(NOREAD_MODE)) ? - open_file(filename, new_buffer, &f) : -2; + open_file(filename, new_buffer, quiet, &f) : -2; /* If we have a file, and we're loading into a new buffer, update * the filename. */ @@ -411,7 +419,7 @@ void replace_buffer(const char *filename) /* If the filename isn't blank, open the file. Otherwise, treat it * as a new file. */ - rc = (filename[0] != '\0') ? open_file(filename, TRUE, &f) : -2; + rc = (filename[0] != '\0') ? open_file(filename, TRUE, FALSE, &f) : -2; /* Reinitialize the text of the current buffer. */ free_filestruct(openfile->fileage); @@ -447,14 +455,15 @@ void display_buffer(void) #ifndef DISABLE_MULTIBUFFER /* Switch to the next file buffer if next_buf is TRUE. Otherwise, * switch to the previous file buffer. */ -void switch_to_prevnext_buffer(bool next_buf) +void switch_to_prevnext_buffer(bool next_buf, bool quiet) { assert(openfile != NULL); /* If only one file buffer is open, indicate it on the statusbar and * get out. */ if (openfile == openfile->next) { - statusbar(_("No more open file buffers")); + if (quiet == FALSE) + statusbar(_("No more open file buffers")); return; } @@ -470,9 +479,10 @@ void switch_to_prevnext_buffer(bool next_buf) display_buffer(); /* Indicate the switch on the statusbar. */ - statusbar(_("Switched to %s"), - ((openfile->filename[0] == '\0') ? _("New Buffer") : - openfile->filename)); + if (quiet == FALSE) + statusbar(_("Switched to %s"), + ((openfile->filename[0] == '\0') ? _("New Buffer") : + openfile->filename)); #ifdef DEBUG dump_filestruct(openfile->current); @@ -483,19 +493,21 @@ void switch_to_prevnext_buffer(bool next_buf) /* Switch to the previous entry in the openfile filebuffer. */ void switch_to_prev_buffer_void(void) { - switch_to_prevnext_buffer(FALSE); + switch_to_prevnext_buffer(FALSE, FALSE); } /* Switch to the next entry in the openfile filebuffer. */ void switch_to_next_buffer_void(void) { - switch_to_prevnext_buffer(TRUE); + switch_to_prevnext_buffer(TRUE, FALSE); } /* Delete an entry from the openfile filebuffer, and switch to the one * after it. Return TRUE on success, or FALSE if there are no more open - * file buffers. */ -bool close_buffer(void) + * file buffers. + * quiet - should we print messages switching bufers + */ +bool close_buffer(bool quiet) { assert(openfile != NULL); @@ -508,7 +520,7 @@ bool close_buffer(void) #endif /* Switch to the next file buffer. */ - switch_to_next_buffer_void(); + switch_to_prevnext_buffer(TRUE, quiet); /* Close the file buffer we had open before. */ unlink_opennode(openfile->prev); @@ -904,10 +916,10 @@ void read_file(FILE *f, int fd, const char *filename, bool undoable, bool checkw * Return -2 if we say "New File", -1 if the file isn't opened, and the * fd opened otherwise. The file might still have an error while reading * with a 0 return value. *f is set to the opened file. */ -int open_file(const char *filename, bool newfie, FILE **f) +int open_file(const char *filename, bool newfie, bool quiet, FILE **f) { struct stat fileinfo, fileinfo2; - int fd, quiet = 0; + int fd; char *full_filename; assert(filename != NULL && f != NULL); diff --git a/src/nano.c b/src/nano.c index 4b14852a..d5947ce8 100644 --- a/src/nano.c +++ b/src/nano.c @@ -1152,7 +1152,7 @@ void do_exit(void) #ifndef DISABLE_MULTIBUFFER /* Exit only if there are no more open file buffers. */ - if (!close_buffer()) + if (!close_buffer(FALSE)) #endif finish(); /* If the user canceled, we go on. */ diff --git a/src/proto.h b/src/proto.h index 2d5a803e..46b0be49 100644 --- a/src/proto.h +++ b/src/proto.h @@ -283,15 +283,15 @@ void replace_buffer(const char *filename); #endif void display_buffer(void); #ifndef DISABLE_MULTIBUFFER -void switch_to_prevnext_buffer(bool next); +void switch_to_prevnext_buffer(bool next, bool quiet); void switch_to_prev_buffer_void(void); void switch_to_next_buffer_void(void); -bool close_buffer(void); +bool close_buffer(bool quiet); #endif filestruct *read_line(char *buf, filestruct *prevnode, bool *first_line_ins, size_t buf_len); void read_file(FILE *f, int fd, const char *filename, bool undoable, bool checkwritable); -int open_file(const char *filename, bool newfie, FILE **f); +int open_file(const char *filename, bool newfie, bool quiet, FILE **f); char *get_next_filename(const char *name, const char *suffix); void do_insertfile( #ifndef NANO_TINY