mdw@git.distorted.org.uk Git - ezmlm/blob - install.c

   1 #include "substdio.h"
   2 #include "stralloc.h"
   3 #include "getln.h"
   4 #include "readwrite.h"
   5 #include "exit.h"
   6 #include "open.h"
   7 #include "error.h"
   8 #include "strerr.h"
   9 #include "byte.h"
  10
  11 stralloc target = {0};
  12 char *to;
  13
  14 #define FATAL "install: fatal: "
  15 void nomem() { strerr_die2x(111,FATAL,"out of memory"); }
  16
  17 char inbuf[SUBSTDIO_INSIZE];
  18 char outbuf[SUBSTDIO_OUTSIZE];
  19 substdio ssin;
  20 substdio ssout;
  21
  22 void doit(line)
  23 stralloc *line;
  24 {
  25   char *x;
  26   unsigned int xlen;
  27   unsigned int i;
  28   char *type;
  29   char *uidstr;
  30   char *gidstr;
  31   char *modestr;
  32   char *mid;
  33   char *name;
  34   unsigned long uid;
  35   unsigned long gid;
  36   unsigned long mode;
  37   int fdin;
  38   int fdout;
  39
  40   x = line->s; xlen = line->len;
  41
  42   type = x;
  43   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  44   x[i++] = 0; x += i; xlen -= i;
  45
  46   uidstr = x;
  47   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  48   x[i++] = 0; x += i; xlen -= i;
  49
  50   gidstr = x;
  51   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  52   x[i++] = 0; x += i; xlen -= i;
  53
  54   modestr = x;
  55   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  56   x[i++] = 0; x += i; xlen -= i;
  57
  58   mid = x;
  59   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  60   x[i++] = 0; x += i; xlen -= i;
  61
  62   name = x;
  63   i = byte_chr(x,xlen,':'); if (i == xlen) return;
  64   x[i++] = 0; x += i; xlen -= i;
  65
  66   if (!stralloc_copys(&target,to)) nomem();
  67   if (!stralloc_cats(&target,mid)) nomem();
  68   if (!stralloc_cats(&target,name)) nomem();
  69   if (!stralloc_0(&target)) nomem();
  70
  71   uid = -1; if (*uidstr) scan_ulong(uidstr,&uid);
  72   gid = -1; if (*gidstr) scan_ulong(gidstr,&gid);
  73   scan_8long(modestr,&mode);
  74
  75   switch(*type) {
  76     case 'd':
  77       if (mkdir(target.s,0700) == -1)
  78         if (errno != error_exist)
  79           strerr_die4sys(111,FATAL,"unable to mkdir ",target.s,": ");
  80       break;
  81
  82     case 'c':
  83       fdin = open_read(name);
  84       if (fdin == -1)
  85         strerr_die4sys(111,FATAL,"unable to read ",name,": ");
  86       substdio_fdbuf(&ssin,read,fdin,inbuf,sizeof(inbuf));
  87
  88       fdout = open_trunc(target.s);
  89       if (fdout == -1)
  90         strerr_die4sys(111,FATAL,"unable to write ",target.s,": ");
  91       substdio_fdbuf(&ssout,write,fdout,outbuf,sizeof(outbuf));
  92
  93       switch(substdio_copy(&ssout,&ssin)) {
  94         case -2:
  95           strerr_die4sys(111,FATAL,"unable to read ",name,": ");
  96         case -3:
  97           strerr_die4sys(111,FATAL,"unable to write ",target.s,": ");
  98       }
  99
 100       close(fdin);
 101       if (substdio_flush(&ssout) == -1)
 102         strerr_die4sys(111,FATAL,"unable to write ",target.s,": ");
 103       if (fsync(fdout) == -1)
 104         strerr_die4sys(111,FATAL,"unable to write ",target.s,": ");
 105       close(fdout);
 106       break;
 107
 108     default:
 109       return;
 110   }
 111
 112   if (chown(target.s,uid,gid) == -1)
 113     strerr_die4sys(111,FATAL,"unable to chown ",target.s,": ");
 114   if (chmod(target.s,mode) == -1)
 115     strerr_die4sys(111,FATAL,"unable to chmod ",target.s,": ");
 116 }
 117
 118 char buf[256];
 119 substdio in = SUBSTDIO_FDBUF(read,0,buf,sizeof(buf));
 120 stralloc line = {0};
 121
 122 void main(argc,argv)
 123 int argc;
 124 char **argv;
 125 {
 126   int match;
 127
 128   umask(077);
 129
 130   to = argv[1];
 131   if (!to) strerr_die2x(100,FATAL,"install: usage: install dir");
 132
 133   for (;;) {
 134     if (getln(&in,&line,&match,'\n') == -1)
 135       strerr_die2sys(111,FATAL,"unable to read input: ");
 136     doit(&line);
 137     if (!match)
 138       _exit(0);
 139   }
 140 }