mirror of
git://git.gnupg.org/gnupg.git
synced 2025-07-02 22:46:30 +02:00
Finished the bulk of changes for gnupg 1.9. This included switching
to libgcrypt functions, using shared error codes from libgpg-error, replacing the old functions we used to have in ../util by those in ../jnlib and ../common, renaming the malloc functions and a couple of types. Note, that not all changes are listed below becuause they are too similar and done at far too many places. As of today the code builds using the current libgcrypt from CVS but it is very unlikely that it actually works.
This commit is contained in:
Werner Koch
parent
b7b07d36e8
commit
c0c2c58054
90 changed files with 5078 additions and 2925 deletions
122
jnlib/dotlock.c
122
jnlib/dotlock.c
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@ -1,5 +1,5 @@
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/* dotlock.c - dotfile locking
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* Copyright (C) 1998,2000,2001 Free Software Foundation, Inc.
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* Copyright (C) 1998,2000,2001,2003 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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@ -42,13 +42,20 @@ struct dotlock_handle {
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char *tname; /* name of lockfile template */
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char *lockname; /* name of the real lockfile */
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int locked; /* lock status */
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int disable; /* locking */
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};
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static DOTLOCK all_lockfiles;
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static volatile DOTLOCK all_lockfiles;
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static int never_lock;
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static int read_lockfile( const char *name );
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static void remove_lockfiles(void);
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void
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disable_dotlock(void)
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{
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never_lock = 1;
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}
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/****************
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* Create a lockfile with the given name and return an object of
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@ -81,13 +88,23 @@ create_dotlock( const char *file_to_lock )
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int dirpartlen;
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if( !initialized ) {
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atexit( remove_lockfiles );
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atexit( dotlock_remove_lockfiles );
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initialized = 1;
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}
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if( !file_to_lock )
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return NULL;
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h = jnlib_xcalloc( 1, sizeof *h );
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if( never_lock ) {
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h->disable = 1;
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#ifdef _REENTRANT
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/* fixme: aquire mutex on all_lockfiles */
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#endif
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h->next = all_lockfiles;
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all_lockfiles = h;
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return h;
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}
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#ifndef HAVE_DOSISH_SYSTEM
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sprintf( pidstr, "%10d\n", (int)getpid() );
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/* fixme: add the hostname to the second line (FQDN or IP addr?) */
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@ -98,8 +115,17 @@ create_dotlock( const char *file_to_lock )
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else
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nodename = utsbuf.nodename;
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if( !(dirpart = strrchr( file_to_lock, '/' )) ) {
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dirpart = ".";
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#ifdef __riscos__
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{
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char *iter = (char *) nodename;
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for (; iter[0]; iter++)
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if (iter[0] == '.')
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iter[0] = '/';
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}
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#endif /* __riscos__ */
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if( !(dirpart = strrchr( file_to_lock, DIRSEP_C )) ) {
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dirpart = EXTSEP_S;
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dirpartlen = 1;
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}
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else {
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@ -114,8 +140,13 @@ create_dotlock( const char *file_to_lock )
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all_lockfiles = h;
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h->tname = jnlib_xmalloc( dirpartlen + 6+30+ strlen(nodename) + 11 );
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sprintf( h->tname, "%.*s/.#lk%p.%s.%d",
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#ifndef __riscos__
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sprintf( h->tname, "%.*s/.#lk%p.%s.%d",
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dirpartlen, dirpart, h, nodename, (int)getpid() );
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#else /* __riscos__ */
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sprintf( h->tname, "%.*s.lk%p/%s/%d",
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dirpartlen, dirpart, h, nodename, (int)getpid() );
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#endif /* __riscos__ */
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do {
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errno = 0;
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@ -147,7 +178,8 @@ create_dotlock( const char *file_to_lock )
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#ifdef _REENTRANT
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/* release mutex */
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#endif
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log_error( "error closing `%s': %s\n", h->tname, strerror(errno));
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log_fatal( "error writing to `%s': %s\n", h->tname, strerror(errno) );
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close(fd);
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unlink(h->tname);
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jnlib_free(h->tname);
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jnlib_free(h);
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@ -159,7 +191,7 @@ create_dotlock( const char *file_to_lock )
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#endif
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#endif /* !HAVE_DOSISH_SYSTEM */
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h->lockname = jnlib_xmalloc( strlen(file_to_lock) + 6 );
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strcpy(stpcpy(h->lockname, file_to_lock), ".lock");
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strcpy(stpcpy(h->lockname, file_to_lock), EXTSEP_S "lock");
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return h;
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}
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@ -191,12 +223,19 @@ make_dotlock( DOTLOCK h, long timeout )
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const char *maybe_dead="";
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int backoff=0;
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if( h->disable ) {
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return 0;
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}
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if( h->locked ) {
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#ifndef __riscos__
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log_debug("oops, `%s' is already locked\n", h->lockname );
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#endif /* !__riscos__ */
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return 0;
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}
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for(;;) {
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#ifndef __riscos__
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if( !link(h->tname, h->lockname) ) {
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/* fixme: better use stat to check the link count */
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h->locked = 1;
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@ -206,6 +245,16 @@ make_dotlock( DOTLOCK h, long timeout )
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log_error( "lock not made: link() failed: %s\n", strerror(errno) );
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return -1;
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}
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#else /* __riscos__ */
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if( !renamefile(h->tname, h->lockname) ) {
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h->locked = 1;
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return 0; /* okay */
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}
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if( errno != EEXIST ) {
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log_error( "lock not made: rename() failed: %s\n", strerror(errno) );
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return -1;
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}
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#endif /* __riscos__ */
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if( (pid = read_lockfile(h->lockname)) == -1 ) {
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if( errno != ENOENT ) {
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log_info("cannot read lockfile\n");
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@ -215,20 +264,27 @@ make_dotlock( DOTLOCK h, long timeout )
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continue;
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}
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else if( pid == getpid() ) {
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log_info( "Oops: lock already hold by us\n");
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log_info( "Oops: lock already held by us\n");
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h->locked = 1;
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return 0; /* okay */
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}
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else if( kill(pid, 0) && errno == ESRCH ) {
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#ifndef __riscos__
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maybe_dead = " - probably dead";
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#if 0 /* we should not do this without checking the permissions */
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#if 0 /* we should not do this without checking the permissions */
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/* and the hostname */
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log_info( "removing stale lockfile (created by %d)", pid );
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#endif
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#endif
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#else /* __riscos__ */
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/* we are *pretty* sure that the other task is dead and therefore
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we remove the other lock file */
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maybe_dead = " - probably dead - removing lock";
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unlink(h->lockname);
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#endif /* __riscos__ */
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}
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if( timeout == -1 ) {
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struct timeval tv;
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log_info( "waiting for lock (hold by %d%s) %s...\n",
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log_info( "waiting for lock (held by %d%s) %s...\n",
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pid, maybe_dead, maybe_deadlock(h)? "(deadlock?) ":"");
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@ -259,6 +315,10 @@ release_dotlock( DOTLOCK h )
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#else
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int pid;
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if( h->disable ) {
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return 0;
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}
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if( !h->locked ) {
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log_debug("oops, `%s' is not locked\n", h->lockname );
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return 0;
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@ -273,11 +333,19 @@ release_dotlock( DOTLOCK h )
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log_error( "release_dotlock: not our lock (pid=%d)\n", pid);
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return -1;
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}
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#ifndef __riscos__
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if( unlink( h->lockname ) ) {
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log_error( "release_dotlock: error removing lockfile `%s'",
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h->lockname);
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return -1;
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}
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#else /* __riscos__ */
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if( renamefile(h->lockname, h->tname) ) {
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log_error( "release_dotlock: error renaming lockfile `%s' to `%s'",
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h->lockname, h->tname);
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return -1;
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}
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#endif /* __riscos__ */
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/* fixme: check that the link count is now 1 */
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h->locked = 0;
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return 0;
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@ -291,9 +359,9 @@ release_dotlock( DOTLOCK h )
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static int
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read_lockfile( const char *name )
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{
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#ifdef HAVE_DOSISH_SYSTEM
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#ifdef HAVE_DOSISH_SYSTEM
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return 0;
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#else
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#else
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int fd, pid;
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char pidstr[16];
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@ -312,20 +380,24 @@ read_lockfile( const char *name )
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pidstr[10] = 0; /* terminate pid string */
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close(fd);
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pid = atoi(pidstr);
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#ifndef __riscos__
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if( !pid || pid == -1 ) {
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#else /* __riscos__ */
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if( (!pid && riscos_getpid()) || pid == -1 ) {
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#endif /* __riscos__ */
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log_error("invalid pid %d in lockfile `%s'", pid, name );
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errno = 0;
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return -1;
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}
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return pid;
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#endif
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#endif
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}
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static void
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remove_lockfiles()
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void
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dotlock_remove_lockfiles()
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{
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#ifndef HAVE_DOSISH_SYSTEM
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#ifndef HAVE_DOSISH_SYSTEM
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DOTLOCK h, h2;
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h = all_lockfiles;
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@ -333,14 +405,16 @@ remove_lockfiles()
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while( h ) {
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h2 = h->next;
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if( h->locked )
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if (!h->disable ) {
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if( h->locked )
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unlink( h->lockname );
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unlink(h->tname);
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jnlib_free(h->tname);
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jnlib_free(h->lockname);
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unlink(h->tname);
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jnlib_free(h->tname);
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jnlib_free(h->lockname);
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}
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jnlib_free(h);
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h = h2;
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}
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#endif
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#endif
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}
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