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/* -*-C-*-
*******************************************************************************
*
* File: mailutil.c
* RCS: /usr/local/sources/CVS/mailapp-utilities/mailutil.c,v 1.7 1997/05/31 21:52:28 tom Exp
* Description: General purpose routines for Mail.app utilities
* Author: Carl Edman
* Created: Sun Apr 25 10:31:24 1993
* Modified: Sat May 31 18:08:58 1997 Tom Hageman <tom@basil.icce.rug.nl>
* Language: C
* Package: N/A
* Status: Experimental (Do Not Distribute)
*
* (C) Copyright 1993, but otherwise this file is perfect freeware.
*
*******************************************************************************
*/
//#import <appkit/appkit.h>
//#import <stdlib.h>
//#import <stdio.h>
//#import <string.h>
#import <libc.h>
//#import <time.h>
//#import <sys/file.h>
//#import <sys/param.h>
//#import <sys/types.h>
//#import <sys/stat.h>
#import <sys/dir.h>
#import <errno.h>
#import <defaults/defaults.h>
#import "mailutil.h"
#import "optutil.h"
extern const char *NXHomeDirectory(void);
extern const char *NXUserName(void);
static char origwd[MAXPATHLEN]="";
int mailboxdir(char *buf)
{
int len;
const char *str;
if (str=NXGetDefaultValue("Mail","MailDir"))
{
strcpy(buf,str);
}
else
{
strcpy(buf,"~/Mailboxes");
}
if ((buf[0]=='~') && (buf[1]=='/'))
{
char temp[MAXPATHLEN];
if (!(str=NXHomeDirectory()) && !(str=getenv("HOME"))) return -1;
strcpy(temp,buf+1);
strcpy(buf,str);
strcat(buf,temp);
}
len=strlen(buf);
if (buf[len-1]=='/')
{
len--;
buf[len]='\0';
}
return len;
}
static char *mboxname;
int cd_mbox(const char *name,int createflag)
{
char mbox[MAXPATHLEN];
int len;
if (!*origwd) getwd(origwd);
/* hack: squirrel mbox name away, for error messages. */
if ((mboxname = realloc(mboxname, strlen(name)+1))) strcpy(mboxname, name);
if (*name=='/')
{
strcpy(mbox,name);
}
else
{
if ((len=mailboxdir(mbox))<0) return 1;
mbox[len++]='/';
strcpy(mbox+len,name);
}
len=strlen(mbox);
if ((len<5)||(strcmp(mbox+len-5,".mbox"))) strcat(mbox,".mbox");
if (access(mbox,(createflag?R_OK|W_OK:R_OK))==-1)
{
if (!(createflag && errno==ENOENT))
{
fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
return 1;
}
if (mkdir(mbox,0755)==-1)
{
fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
return 1;
}
}
if (chdir(mbox)==-1)
{
fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
return 1;
}
return 0;
}
int uncd_mbox(void)
{
if (!*origwd) return 1;
if (chdir(origwd)==-1)
{
fprintf(stderr,"%s: %s: leaving directory: %s\n",progname(),mboxname,strerror(errno));
return 1;
}
return 0;
}
/* Lockfile handling. */
int try_lock_mbox_file(const char *lockfile, char *lockhost, char *lockuser, int *lockpid)
{
int fd,i;
char line[LINELEN],localhost[MAXHOSTNAMELEN];
gethostname(localhost,sizeof(localhost));
while ((fd=open(lockfile,O_CREAT|O_EXCL|O_WRONLY,0666))<0)
{
char *host="(unknown)",*user="(unknown)",*pid="";
if (errno!=EEXIST)
{
fprintf(stderr,"%s: %s: [%s] locking: %s\n",progname(),mboxname,lockfile,strerror(errno));
return -1;
}
if ((fd=open(lockfile,O_RDONLY))<0)
{
fprintf(stderr,"%s: %s: [%s] reading lock: %s\n",progname(),mboxname,lockfile,strerror(errno));
}
else
{
if ((i=read(fd,line,sizeof(line)))<0)
{
fprintf(stderr,"%s: %s: [%s] reading lock: %s\n",progname(),mboxname,lockfile,strerror(errno));
}
else
{
line[MIN(i,sizeof(line)-1)]='\0';
host=line;
for(user=host;*user && (*user!=',');user++);
if (*user)
{
*user++='\0';
for(pid=user;*pid && (*pid!=',');pid++);
if (*pid) *pid++='\0';
}
}
close(fd);
}
if (((i=atoi(pid))>0) && (strcmp(host,localhost)==0) && (kill(i,0)==-1) && (errno==ESRCH))
{
unlock_mbox_file(lockfile);
continue;
}
if (lockhost) strcpy(lockhost, host);
if (lockuser) strcpy(lockuser, user);
if (lockpid) *lockpid = i;
return 1;
}
sprintf(line,"%s,"LOCK_USER_FMT",%d",localhost,NXUserName(),progname(),getpid());
write(fd,line,strlen(line));
close(fd);
// Ugh! this is yucky...:
if (lockhost) strcpy(lockhost,localhost);
if (lockuser) sprintf(lockuser,LOCK_USER_FMT,NXUserName(),progname());
if (lockpid) *lockpid = getpid();
return 0;
}
int lock_mbox_file(const char *lockfile, int nowaitflg)
{
char host[MAXHOSTNAMELEN], user[LINELEN];
int pid;
if (try_lock_mbox_file(lockfile, host, user, &pid))
{
if (nowaitflg)
{
fprintf(stderr,"%s: %s: [%s] already locked by %s on %s (pid=%d)\n",progname(),mboxname,lockfile,user,host,pid);
return 1;
}
fprintf(stderr,"%s: %s: [%s] waiting on lock by %s on %s (pid=%d)\n",progname(),mboxname,lockfile,user,host,pid);
do
{
sleep(5);
}
while (try_lock_mbox_file(lockfile, host, user, &pid));
}
return 0;
}
int unlock_mbox_file(const char *lockfile)
{
if (unlink(lockfile)<0)
{
fprintf(stderr,"%s: %s: [%s] unlocking: %s\n",progname(),mboxname,lockfile,strerror(errno));
return 1;
}
return 0;
}
/* For backward compatibility: functions for lock shared with Mail.app. */
#define MAILAPP_LOCK ".lock"
int try_lock_mbox(char *lockuser, char *lockhost, int *lockpid)
{
return try_lock_mbox_file(MAILAPP_LOCK, lockuser, lockhost, lockpid);
}
int lock_mbox(int nowaitflg)
{
return lock_mbox_file(MAILAPP_LOCK, nowaitflg);
}
int unlock_mbox(void)
{
return unlock_mbox_file(MAILAPP_LOCK);
}
time_t mtime(const char *path)
{
struct stat sb;
if (stat(path,&sb)==-1) return -1;
return(sb.st_mtime);
}
off_t filesize(const char *path)
{
struct stat sb;
if (stat(path,&sb)==-1) return -1;
return(sb.st_size);
}
int dirsize(char *path)
{
struct stat sb;
int size,i,len;
DIR *dir;
struct direct *dp;
if (lstat(path,&sb)==-1) return -1;
size=sb.st_blocks*STAT_BSIZE;
if (!(sb.st_mode&S_IFDIR)) return size;
if (!(dir=opendir(path))) return -1;
len=strlen(path);
while(dp=readdir(dir))
{
if (!strcmp(dp->d_name,".")||
!strcmp(dp->d_name,"..")) continue;
if ((len>0) || (path[len-1]!='/'))
{
path[len]='/'; path[len+1]='\0';
}
strcat(path,dp->d_name);
i=dirsize(path);
path[len]='\0';
if (i==-1) return -1;
size+=i;
}
closedir(dir);
return size;
}
static void forall_mboxes_recurse(char *path,void (*func)(const char *))
{
int len;
struct stat sb;
DIR *dir;
struct direct *dp;
if (stat(path,&sb)==-1) return;
if (!(sb.st_mode&S_IFDIR)) return;
len=strlen(path);
if ((len>5)&&(!strcmp(path+len-5,".mbox")))
{
func(path);
return;
}
if (!(dir=opendir(path))) return;
while(dp=readdir(dir))
{
if (!strcmp(dp->d_name,".")||
!strcmp(dp->d_name,"..")) continue;
if ((len>0) || (path[len-1]!='/'))
{
path[len]='/'; path[len+1]='\0';
}
strcat(path,dp->d_name);
forall_mboxes_recurse(path,func);
path[len]='\0';
}
closedir(dir);
}
void forall_mboxes(void (*func)(const char *))
{
char path[MAXPATHLEN];
if (mailboxdir(path)<0) return;
forall_mboxes_recurse(path,func);
}
char *strpcpy(char *to,const char *beg,const char *end)
{
strncpy(to,beg,end-beg);
to[end-beg]='\0';
return to;
}
int strpequ(char *to,const char *beg,const char *end)
{
int len=strlen(to);
return (len==end-beg)&&(!strncmp(to,beg,len));
}
int strpcaseequ(char *to,const char *beg,const char *end)
{
int len=strlen(to);
return (len==end-beg)&&(!strncasecmp(to,beg,len));
}
char *strpcat(char *to,const char *beg,const char *end)
{
strpcpy(to+strlen(to),beg,end);
return to;
}
void appstring(char **string,int *len,int *maxlen,const char *app,const int alen)
{
if (*string==0)
{
*maxlen=LINELEN;
*string=malloc(*maxlen);
*len=0;
}
while (alen+*len>*maxlen)
{
*maxlen*=2;
*string=realloc(*string,*maxlen);
}
memmove(*string+*len,app,alen);
*len+=alen;
}
char *growstring(char **string,int *len,int *maxlen,const int alen)
{
if (*string==0)
{
*maxlen=LINELEN;
*string=malloc(*maxlen);
*len=0;
}
while (alen+*len>*maxlen)
{
*maxlen*=2;
*string=realloc(*string,*maxlen);
}
return *string+*len;
}
/* 32-bit CRC table from Gary S. Browns crc program */
static unsigned long int crc32tab[] = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
unsigned long int calc_crc(const char *beg,int len)
{
const char *c;
unsigned long int crc=0xffffffff;
for(c=beg;c<beg+len;c++) crc=crc32tab[(crc^*c) & 0xff]^(crc>>8);
return ~crc;
}
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