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OS/2 Shareware BBS: 9 Archive
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ARCRUN.C
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1987-10-15
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5KB
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/* ARC - Archive utility - ARCRUN
$define(tag,$$segment(@1,$$index(@1,=)+1))#
$define(version,Version $tag(
TED_VERSION DB =1.17), created on $tag(
TED_DATE DB =02/03/86) at $tag(
TED_TIME DB =22:59:06))#
$undefine(tag)#
$version
(C) COPYRIGHT 1985 by System Enhancement Associates; ALL RIGHTS RESERVED
By: Thom Henderson
Description:
This file contains the routines used to "run" a file
which is stored in an archive. At present, all we really do
is (a) extract a temporary file, (b) give its name as a system
command, and then (c) delete the file.
Language:
Computer Innovations Optimizing C86
*/
#include <stdio.h>
#include "arc.h"
runarc(num,arg) /* run file from archive */
int num; /* number of arguments */
char *arg[]; /* pointers to arguments */
{
struct heads hdr; /* file header */
int run; /* true to run current file */
int did[_MAXARG]; /* true when argument was used */
int n; /* index */
char *makefnam(); /* filename fixer */
char buf[_STRLEN]; /* filename buffer */
FILE *fopen(); /* file opener */
for(n=0; n<num; n++) /* for each argument */
did[n] = 0; /* reset usage flag */
rempath(num,arg); /* strip off paths */
openarc(0); /* open archive for reading */
if(num) /* if files were named */
{ while(readhdr(&hdr,arc)) /* while more files to check */
{ run = 0; /* reset run flag */
for(n=0; n<num; n++) /* for each template given */
{ if(match(hdr.name,makefnam(arg[n],".*",buf)))
{ run = 1; /* turn on run flag */
did[n] = 1; /* turn on usage flag */
break; /* stop looking */
}
}
if(run) /* if running this one */
runfile(&hdr); /* then do it */
else /* else just skip it */
fseek(arc,hdr.size,1);
}
}
else while(readhdr(&hdr,arc)) /* else run all files */
runfile(&hdr);
closearc(0); /* close archive after changes */
if(note)
{ for(n=0; n<num; n++) /* report unused args */
{ if(!did[n])
{ printf("File not found: %s\n",arg[n]);
nerrs++;
}
}
}
}
static runfile(hdr) /* run a file */
struct heads *hdr; /* pointer to header data */
{
FILE *tmp, *fopen(); /* temporary file */
char buf[_STRLEN], *makefnam(); /* temp file name, fixer */
char sys[_STRLEN]; /* invocation command buffer */
char *dir, *gcdir(); /* directory stuff */ /*mpl*/
makefnam("$ARCTEMP",hdr->name,buf);
if(!strcmp(buf,"$ARCTEMP.BAS"))
strcpy(sys,"BASICA $ARCTEMP");
else if(!strcmp(buf,"$ARCTEMP.BAT")
|| !strcmp(buf,"$ARCTEMP.COM")
|| !strcmp(buf,"$ARCTEMP.EXE"))
strcpy(sys,"$ARCTEMP");
else
{ if(warn)
{ printf("File %s is not a .BAS, .BAT, .COM, or .EXE\n",
hdr->name);
nerrs++;
}
fseek(arc,hdr->size,1); /* skip this file */
return;
}
if(warn)
if(tmp=fopen(buf,"rb"))
abort("Temporary file %s already exists",buf);
if(!(tmp=fopen(makefnam("$ARCTEMP",hdr->name,buf),"w+b")))
abort("Unable to create temporary file %s",buf);
if(note)
printf("Invoking file: %s\n",hdr->name);
dir = gcdir(""); /* see where we are */
unpack(arc,tmp,hdr); /* unpack the entry */
fclose(tmp); /* release the file */
system(sys); /* try to invoke it */
chdir(dir); free(dir); /* return to whence we started */
if(unlink(buf) && warn)
{ printf("Cannot unsave temporary file %s\n",buf);
nerrs++;
}
}
/* +-------------------------------------------------------------------+
| gcdir() |
| does getcwd |
+-------------------------------------------------------------------+ */
char *gcdir()
{
extern char *strdup();
char curdir[64];
getcwd(curdir,64);
return strdup(curdir);
}