Several improvements ; WIP ignore option
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174
adhocify.c
174
adhocify.c
@ -16,8 +16,9 @@
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#include <stdbool.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <fnmatch.h>
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#define BUF_SIZE (sizeof(struct inotify_event) * 1024) + 255
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#define STREQ(s1,s2) ( strcmp(s1,s2) == 0 )
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struct ifdLookup
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{
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@ -27,10 +28,23 @@ struct ifdLookup
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struct ifdLookup *next;
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};
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struct ifdLookup *lkp_first = NULL;
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struct ifdLookup **lookup = &lkp_first;
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struct ifdLookup *lkp_head = NULL;
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struct ifdLookup **lookup = &lkp_head;
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struct ignorelist
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{
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char *ignore;
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struct ignorelist *next;
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};
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struct ignorelist *ignorelist_head = NULL;
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struct ignorelist **ignorelist_current = &ignorelist_head;
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bool silent;
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void *xmalloc(size_t size)
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{
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void *m = malloc(size);
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@ -74,20 +88,39 @@ char *ndirname(const char *path)
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char *find_ifd_path(int ifd)
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{
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for(struct ifdLookup *lkp = lkp_first; lkp != NULL; lkp = lkp->next)
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if(lkp->ifd == ifd) return lkp->path;
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for(struct ifdLookup *lkp = lkp_head; lkp != NULL; lkp = lkp->next)
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if(lkp->ifd == ifd)
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return lkp->path;
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return NULL;
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}
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bool is_ignored(const char *str)
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{
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for(struct ignorelist *l = ignorelist_head; l != NULL; l = l->next)
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if(fnmatch(str, l->ignore, 0) == 0)
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return true;
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return false;
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}
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void add_ignore_list(const char *str)
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{
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*ignorelist_current = xmalloc(sizeof(struct ignorelist));
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(*ignorelist_current)->ignore = xstrdup(str);
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ignorelist_current = &(*ignorelist_current)->next;
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}
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void logwrite(const char *format, ...)
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{
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if(silent) return;
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va_list args;
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va_start(args, format);
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vfprintf(stderr, format, args);
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fflush(stderr);
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vfprintf(stdout, format, args);
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fflush(stdout);
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va_end(args);
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}
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@ -102,7 +135,7 @@ void logerror(const char *format, ...)
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vfprintf(stderr, tmp, args);
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fflush(stderr);
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va_end(args);
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}
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void queue_watch(char *pathname)
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@ -116,8 +149,9 @@ void queue_watch(char *pathname)
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}
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*lookup = xmalloc(sizeof(struct ifdLookup));
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struct ifdLookup *lkp = *lookup;
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lkp->ifd = 0;
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char *path = xrealpath(pathname, NULL);
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lkp->ifd = 0;
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lkp->path = path;
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lkp->isdir = S_ISDIR(sb.st_mode);
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lkp->next = NULL;
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@ -127,7 +161,7 @@ void queue_watch(char *pathname)
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void start_watches(int fd, uint32_t mask)
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{
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struct ifdLookup *lkp = lkp_first;
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struct ifdLookup *lkp = lkp_head;
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for(; lkp != NULL; lkp = lkp->next)
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{
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int ret = inotify_add_watch(fd, lkp->path, mask);
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@ -182,23 +216,23 @@ bool run( char *path, char *eventfile, const char *outfile, uint32_t mask, bool
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if(! redirect_stdout(outfile))
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return false;
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}
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char *argv0 = memrchr(path, '/', strlen(path));
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if(argv0==NULL)
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argv0=path;
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else
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argv0+=1;
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argv0 = ( argv0 == NULL ) ? path : argv0+1;
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envvar = xmalloc(19 * sizeof(char));
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sprintf(envvar, "adhocifyevent=%"PRIu32, mask);
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putenv(envvar);
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execl(path, argv0, (! noappend) ? eventfile : NULL, NULL);
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perror("execlp");
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return false;
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}
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if(pid == -1)
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{
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perror("fork");
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return false;
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}
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return true;
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@ -206,33 +240,33 @@ bool run( char *path, char *eventfile, const char *outfile, uint32_t mask, bool
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uint32_t nameToMask(char *name)
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{
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if(!strcmp(name, "IN_CLOSE_WRITE"))
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if(STREQ(name, "IN_CLOSE_WRITE"))
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return IN_CLOSE_WRITE;
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else if(!strcmp(name, "IN_OPEN"))
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else if(STREQ(name, "IN_OPEN"))
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return IN_OPEN;
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else if(!strcmp(name, "IN_MODIFY"))
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else if(STREQ(name, "IN_MODIFY"))
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return IN_MODIFY;
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else if(!strcmp(name, "IN_DELETE"))
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else if(STREQ(name, "IN_DELETE"))
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return IN_DELETE;
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else if(!strcmp(name, "IN_ATTRIB"))
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else if(STREQ(name, "IN_ATTRIB"))
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return IN_ATTRIB;
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else if(!strcmp(name, "IN_CLOSE_NOWRITE"))
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else if(STREQ(name, "IN_CLOSE_NOWRITE"))
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return IN_CLOSE_NOWRITE;
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else if(!strcmp(name, "IN_MOVED_FROM"))
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else if(STREQ(name, "IN_MOVED_FROM"))
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return IN_MOVED_FROM;
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else if(!strcmp(name, "IN_MOVED_TO"))
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else if(STREQ(name, "IN_MOVED_TO"))
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return IN_MOVED_TO;
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else if(!strcmp(name, "IN_CREATE"))
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else if(STREQ(name, "IN_CREATE"))
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return IN_CREATE;
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else if(!strcmp(name, "IN_DELETE_SELF"))
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else if(STREQ(name, "IN_DELETE_SELF"))
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return IN_DELETE_SELF;
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else if(!strcmp(name, "IN_MOVE_SELF"))
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else if(STREQ(name, "IN_MOVE_SELF"))
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return IN_DELETE_SELF;
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else if(!strcmp(name, "IN_ALL_EVENTS"))
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else if(STREQ(name, "IN_ALL_EVENTS"))
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return IN_ALL_EVENTS;
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else if(!strcmp(name, "IN_CLOSE"))
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else if(STREQ(name, "IN_CLOSE"))
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return IN_CLOSE;
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else if(!strcmp(name, "IN_MOVE"))
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else if(STREQ(name, "IN_MOVE"))
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return IN_MOVE;
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else
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return 0;
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@ -244,15 +278,15 @@ void check_forkbomb(char *dir_log, char *dir_prog)
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dir_log = ndirname(dir_log);
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dir_prog = ndirname(dir_prog);
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struct ifdLookup *lkp = lkp_first;
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struct ifdLookup *lkp = lkp_head;
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while(lkp)
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{
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if(lkp->isdir)
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{
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char *dir_lkpPath = lkp->path;
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if( !strcmp(dir_lkpPath, dir_log)
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|| !strcmp(dir_lkpPath, dir_prog))
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if( STREQ(dir_lkpPath, dir_log)
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|| STREQ(dir_lkpPath, dir_prog))
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{
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logerror("Don't place your logfiles or prog in a directory you are watching for events\n");
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exit(EXIT_FAILURE);
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@ -266,7 +300,7 @@ void check_forkbomb(char *dir_log, char *dir_prog)
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free(dir_prog);
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}
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void watches_from_stdin()
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void queue_watches_from_stdin()
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{
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char *line = NULL;
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size_t n = 0;
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@ -283,7 +317,7 @@ char *get_eventfile_abspath(struct inotify_event *event)
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char *wdpath = find_ifd_path(event->wd);
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if(wdpath == NULL)
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return NULL;
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size_t nameLen = strlen(event->name);
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char *abspath = xmalloc((strlen(wdpath) + nameLen + 2) * sizeof(char));
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strcpy(abspath, wdpath);
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@ -296,6 +330,34 @@ char *get_eventfile_abspath(struct inotify_event *event)
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return abspath;
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}
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void handle_event(struct inotify_event *event, uint32_t mask, char *prog, const char *logfile, bool noappend)
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{
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if(event->mask & mask)
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{
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char *eventfile_abspath = get_eventfile_abspath(event);
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if(eventfile_abspath == NULL)
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{
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logerror("Could not get absoulte path for event. Watch descriptor %i\n", event->wd);
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exit(EXIT_FAILURE);
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}
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logwrite("Starting execution of child %s\n", prog);
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bool r = run(prog, eventfile_abspath, logfile, event->mask, noappend);
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if(!r)
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{
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logerror("Execution of child %s failed\n", prog);
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exit(EXIT_FAILURE);
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}
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fflush(stdout);
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fflush(stderr);
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free (eventfile_abspath);
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}
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}
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int main(int argc, char **argv)
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{
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uint32_t mask = 0;
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@ -307,7 +369,7 @@ int main(int argc, char **argv)
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int ifd;
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char *logfile = NULL;
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char *watchpath = NULL;
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if(argc < 2)
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{
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logwrite("Insert usage text here\n");
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@ -351,10 +413,16 @@ int main(int argc, char **argv)
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case 'b':
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forkbombcheck=false;
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break;
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case 'i':
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add_ignore_list(optarg);
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break;
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case 'q':
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silent=true;
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break;
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}
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}
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if(lkp_first == NULL)
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if(lkp_head == NULL)
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{
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watchpath = getcwd(NULL,0);
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if(watchpath == NULL)
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@ -364,10 +432,10 @@ int main(int argc, char **argv)
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}
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queue_watch(watchpath);
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}
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if(fromstdin)
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watches_from_stdin();
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queue_watches_from_stdin();
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if(mask == 0) mask |= IN_CLOSE_WRITE;
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if(optind >= argc)
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{
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@ -379,17 +447,17 @@ int main(int argc, char **argv)
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if(logfile)
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logfile = xrealpath(logfile, NULL);
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if(forkbombcheck)
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{
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char *path_prog = xrealpath(prog, NULL);
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check_forkbomb(logfile, path_prog);
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}
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ifd = inotify_init();
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start_watches(ifd, mask);
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while(1)
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{
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int len;
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@ -402,29 +470,13 @@ int main(int argc, char **argv)
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perror("read");
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exit(EXIT_FAILURE);
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}
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while(i < len)
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{
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struct inotify_event *event = (struct inotify_event *)&buf[i];
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if(event->mask & mask)
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{
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char *eventfile_abspath = get_eventfile_abspath(event);
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if(eventfile_abspath == NULL)
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{
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logerror("Could not get absoulte path for event. Watch descriptor %i\n", event->wd);
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break;
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}
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logwrite("Starting execution of child %s\n", prog);
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int r = run(prog, eventfile_abspath, logfile, event->mask, noappend);
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if(!r)
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logerror("Execution of child %s failed\n", prog);
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fflush(stdout);
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fflush(stderr);
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free (eventfile_abspath);
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}
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handle_event(event, mask, prog, logfile, noappend);
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i+=sizeof(struct inotify_event) + event->len;
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