gno/sbin/renram5/renram5.c

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/*
* renram5
*
* This program is intended to be launched during boot time. It
* renames the volume /RAM5 to /tmp if /tmp does not already exist.
*
* It can also be invoked as a shell command (in which it should
* be changed to an exec file rather than a s16 file). As a shell
* command, its usage is:
* renram5 [-d] [ oldname [newname]]
*
* If <oldname> is not specified, it defaults to "/RAM5". If <newname> is
* not specified, it defaults to "/tmp". The -d flag enables debugging
* output.
*
* You probably need GNO/ME libraries in order to link this program.
*
* Written by Devin Reade <gdr@myrias.com> January 1996.
* This program is placed in the public domain.
*
* $Id: renram5.c,v 1.2 1997/09/21 22:27:40 gdr Exp $
*
* This file is formatted with tab tops every 8 columns.
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*/
#include <types.h>
#include <gsos.h>
#include <orca.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef P_tmpdir
#define P_tmpdir "/tmp"
#endif
#define OLD_TMP "/RAM5"
#define NEW_TMP P_tmpdir
extern GSString255Ptr __C2GSMALLOC(char *);
extern int _mapErr(int);
void usage(char *progname) {
printf("Usage: %s [-d] [oldvolume [newvolume]]\n",progname);
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printf("\toldvolume defaults to %s\n",OLD_TMP);
printf("\tnewvolume defaults to %s\n",NEW_TMP);
printf("\t-d\tproduce debug information\n\n");
printf("This program renames volumes. It was intended to rename\n");
printf("%s at boot time. As a side effect, it can also rename files.\n\n",
OLD_TMP);
printf("Version 1.0 by Devin Reade <gdr@myrias.com>\n");
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printf("This program is in the public domain.\n");
exit(1);
}
int main (int argc, char **argv) {
DevNumRecGS devrec;
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ChangePathRecGS pathrec;
char *file1, *file2;
int i, filecount, debug;
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filecount=0;
debug=0;
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/* parse the command line, if any */
if (argc > 1) {
for (i=1; i<argc; i++) {
if (!strcmp(argv[i],"-d")) {
debug++;
} else if ((argv[i][0] == '-') || (filecount > 2)) {
usage(argv[0]);
} else if (filecount==0) {
file1 = argv[i];
filecount++;
} else if (filecount==1) {
file2 = argv[i];
filecount++;
} else assert(0);
}
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}
switch (filecount) {
case 0:
file1 = OLD_TMP;
file2 = NEW_TMP;
break;
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case 1:
file2 = NEW_TMP;
break;
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case 2:
break;
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default:
assert(0);
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}
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assert(file1);
assert(file2);
/*
* see if file2 is already around
*/
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devrec.pCount = 2;
if ((devrec.devName = (GSString32Ptr) __C2GSMALLOC(file2)) == NULL) {
perror("couldn't duplicate destination volume name");
exit(1);
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}
GetDevNumberGS(&devrec);
i=toolerror();
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switch (i) {
case 0:
if (debug) {
printf("volume %s already exists on device %d\n",file2,
devrec.devNum);
}
exit(1);
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case devNotFound:
case volNotFound:
/* this is what we're normally expecting */
break;
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default:
fprintf(stderr,"couldn't get %s device number: %s\n",file2,
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strerror(_mapErr(i)));
exit(1);
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}
/*
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* rename the volume
*/
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pathrec.pCount = 3;
pathrec.pathname = __C2GSMALLOC(file1);
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pathrec.newPathname = __C2GSMALLOC(file2);
pathrec.flags = 0;
if (!pathrec.pathname || !pathrec.newPathname) {
perror("couldn't duplicate volume names");
exit(1);
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}
ChangePathGS(&pathrec);
i=toolerror();
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switch (i) {
case 0:
if (debug) printf("device renamed\n");
break;
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case pathNotFound:
case volNotFound:
if (debug) printf("device not renamed: %s\n",strerror(_mapErr(i)));
break;
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default:
fprintf(stderr,"couldn't rename %s to %s: %s\n",file1, file2,
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strerror(_mapErr(i)));
exit(1);
}
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return 0;
}