diff options
| -rw-r--r-- | src/lockfile.c | 240 |
1 files changed, 221 insertions, 19 deletions
diff --git a/src/lockfile.c b/src/lockfile.c index 9dd2925..cc0ad42 100644 --- a/src/lockfile.c +++ b/src/lockfile.c @@ -10,6 +10,9 @@ static char rcsid[] = "$Id$"; /* * $Log$ + * Revision 1.3 2008/02/15 18:16:35 james + * *** empty log message *** + * * Revision 1.2 2008/02/15 16:48:56 james * *** empty log message *** * @@ -21,13 +24,88 @@ static char rcsid[] = "$Id$"; #define LOCK_ASCII #undef LOCK_BINARY +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <malloc.h> +#include <unistd.h> +#include <string.h> +#include <strings.h> +#include <stdlib.h> +#include <pwd.h> +#include <fcntl.h> +#include <dirent.h> + +#include "lockfile.h" + +Filelist * +filelist_new (void) +{ + Filelist *fl = (Filelist *) malloc (sizeof (Filelist)); + + fl->head = NULL; + + return fl; +} + +void +filelist_remove (Filelist * fl, Filelist_ent * fle) +{ + Filelist_ent **ep; + + for (ep = &fl->head; *ep; ep = &((*ep)->next)) + if (fle == *ep) + break; -Filelist *filelist_new(void) + + if (!*ep) + return; + + *ep = fle->next; + + free (fle); +} + +void +filelist_add (Filelist * fl, char *fn) { + Filelist_ent *fle; + int i = strlen (fn); + + if (i >= FILE_LIST_MAX_LEN) + return; + + for (fle=fl->head;fle;fle=fle->next) + if (!strcmp(fle->name,fn)) return; + + fle = malloc (sizeof (Filelist_ent)); + + strcpy (fle->name, fn); + fle->next = fl->head; + fl->head = fle; +} +void +filelist_free (Filelist * fl) +{ + while (fl->head) + filelist_remove (fl, fl->head); + free (fl); +} +void filelist_print(Filelist *fl,FILE *f) +{ +Filelist_ent *fle; +if (!fl) { + fprintf(f,"(empty list)\n"); + return; } + for (fle=fl->head;fle;fle=fle->next) + fprintf(f,"%s\n",fle->name); +} + + static int @@ -53,7 +131,7 @@ chown_uucp (fd) } int -lockfile_make +lockfile_make (char *name) { char buf[1024], tmpfn[1024]; char *ptr; @@ -73,6 +151,7 @@ lockfile_make i = sprintf (buf, "%10d\n", getpid ()); + unlink (tmpfn); fd = open (tmpfn, O_WRONLY | O_CREAT | O_TRUNC, 0444); if (fd < 0) { @@ -102,29 +181,111 @@ lockfile_make } +void +lockfile_add_places (Filelist * fl, char *leaf) +{ + char buf[1024]; + struct stat stbuf; + char *lock_dirs[] = + { "/var/lock/uucp", "/var/spool/lock", "/var/spool/uucp", "/etc/locks", + "/usr/spool/uucp", "/var/spool/locks", "/usr/spool/lock", + "/usr/spool/locks", + "/usr/spool/uucp/LCK" + }; + int i; + + for (i = 0; i < (sizeof (lock_dirs) / sizeof (char *)); ++i) + { + if (stat (lock_dirs[i], &stbuf)) + continue; + strcpy (buf, lock_dirs[i]); + strcat (buf, "/"); + strcat (buf, leaf); + filelist_add (fl, buf); + } +} + + +static void +do_tedious_mangling (Filelist * fl, char *buf, char *ptr, char inv, int lower) +{ + while (*ptr) + { + if (lower && (*ptr >= 'A') && (*ptr <= 'Z')) + *ptr |= 32; + if (*ptr == '/') + *ptr = inv; + ptr++; + } + + lockfile_add_places (fl, buf); +} + + +void +lockfile_regularize_and_add (Filelist * fl, char *leaf) +{ + char buf[1024] = "LCK.."; + char *ptr; + + if (*leaf == '/') + leaf++; + + ptr = buf; + while (*ptr) + ptr++; + + strcpy (ptr, leaf); + do_tedious_mangling (fl, buf, ptr, '_', 0); + strcpy (ptr, leaf); + do_tedious_mangling (fl, buf, ptr, '_', 1); + strcpy (ptr, leaf); + do_tedious_mangling (fl, buf, ptr, '.', 0); + strcpy (ptr, leaf); + do_tedious_mangling (fl, buf, ptr, '.', 1); +} void -lockfile_add_name_from_path (File_list *fl,char *ptr) +lockfile_add_name_from_path (Filelist * fl, char *file) { - printf ("lock by file %s\n", ptr); + char *ptr = file; + + + if (*ptr == '/') + ptr++; + lockfile_regularize_and_add (fl, ptr); + + if (!strncmp (ptr, "dev/", 4)) + { + ptr += 4; + lockfile_regularize_and_add (fl, ptr); + } + } void -lockfile_add_name_from_dev (File_list *fl,dev_t dev) +lockfile_add_name_from_dev (Filelist * fl, dev_t dev) { - printf ("lock by dev %x\n", dev); + char buf[1024]; + sprintf (buf, "LCK.%03d.%03d", major (dev), minor (dev)); + lockfile_add_places (fl, buf); } -void lockfile_check_dir_for_dev(File_list *fl,char *dir,dev_t dev) +void +lockfile_check_dir_for_dev (Filelist * fl, char *dir, dev_t dev) { char buf[1024]; struct stat ent_stat; struct dirent *de; DIR *d; - for (d = opendir (DEV); (de = readdir (d));) + d = opendir (dir); + + if (!d) return; + + while ((de = readdir (d))) { - strcpy (buf, DEV); + strcpy (buf, dir); strcat (buf, de->d_name); if (stat (buf, &ent_stat)) @@ -134,17 +295,17 @@ void lockfile_check_dir_for_dev(File_list *fl,char *dir,dev_t dev) if (ent_stat.st_rdev != dev) continue; - lockfile_add_name_from_path (fl,buf); + lockfile_add_name_from_path (fl, buf); } closedir (d); } -File_list * -construct_possible_lock_files (char *device) +Filelist * +lockfile_make_list(char *device) { struct stat dev_stat; - File_list *ret=NULL; + Filelist *ret = NULL; if (stat (device, &dev_stat)) @@ -152,18 +313,59 @@ construct_possible_lock_files (char *device) if (!S_ISCHR (dev_stat.st_mode)) return ret; - ret=filelist_new(); + ret = filelist_new (); - lockfile_add_name_from_dev (ret,dev_stat.st_rdev); + lockfile_add_name_from_dev (ret, dev_stat.st_rdev); - lockfile_add_name_from_path (ret,device); + lockfile_add_name_from_path (ret, device); - lockfile_check_dir_for_dev(ret,"/dev/",dev_stat.st_rdev); - lockfile_check_dir_for_dev(ret,"/dev/usb/",dev_stat.st_rdev); - lockfile_check_dir_for_dev(ret,"/dev/tts/",dev_stat.st_rdev); + lockfile_check_dir_for_dev (ret, "/dev/", dev_stat.st_rdev); + lockfile_check_dir_for_dev (ret, "/dev/usb/", dev_stat.st_rdev); + lockfile_check_dir_for_dev (ret, "/dev/tts/", dev_stat.st_rdev); return ret; } +void lockfile_remove_stale(Filelist *fl) +{ + + +} + + +Filelist *lockfile_lock(Filelist *fl) +{ +Filelist *ret; +Filelist_ent *fle; + +ret=filelist_new(); + +lockfile_remove_stale(fl); + +for (fle=fl->head;fle;fle=fle->next) { + if (lockfile_make(fle->name)) { + fprintf(stderr,"Failed to get lockfile %s\n",fle->name); + filelist_free(ret); + return NULL; + } + filelist_add(ret,fle->name); +} + +return ret; +} + +#if 1 +int main(int argc,char *argv[]) +{ +Filelist *fl=lockfile_make_list("/dev/ttyS0"); +Filelist *fll; +Filelist_ent *fle; + +filelist_print(fl,stdout); +fll=lockfile_lock(fl); + +filelist_print(fll,stdout); +} +#endif |