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rm -e prints the return value of remove syscalls

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Some devices return useful info on specific file remove (eg #0/pid, #0/ppid...)
so we need a tool to get such info.

	rm -e '#0/pid' '#0/ppid'
	#0/pid 65
	#0/ppid 59
This commit is contained in:
Giacomo Tesio 2016-12-26 01:16:31 +01:00
parent 31aa85b01a
commit 71ea62eb5b
1 changed files with 23 additions and 12 deletions
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35
sys/src/cmd/rm.c
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@ -12,11 +12,14 @@
char errbuf[ERRMAX]; char errbuf[ERRMAX];
int ignerr = 0; int ignerr = 0;
int printerr = 0;
void void
err(char *f) err(long e, char *f)
{ {
if(!ignerr){ if(printerr){
print("%s %ulld\n", f, e);
} else if(!ignerr){
errbuf[0] = '\0'; errbuf[0] = '\0';
errstr(errbuf, sizeof errbuf); errstr(errbuf, sizeof errbuf);
fprint(2, "rm: %s: %s\n", f, errbuf); fprint(2, "rm: %s: %s\n", f, errbuf);
@ -30,38 +33,39 @@ void
rmdir(char *f) rmdir(char *f)
{ {
char *name; char *name;
long e;
int fd, i, j, n, ndir, nname; int fd, i, j, n, ndir, nname;
Dir *dirbuf; Dir *dirbuf;
fd = open(f, OREAD); fd = open(f, OREAD);
if(fd < 0){ if(fd < 0){
err(f); err(-1, f);
return; return;
} }
n = dirreadall(fd, &dirbuf); n = dirreadall(fd, &dirbuf);
close(fd); close(fd);
if(n < 0){ if(n < 0){
err("dirreadall"); err(-1, "dirreadall");
return; return;
} }
nname = strlen(f)+1+STATMAX+1; /* plenty! */ nname = strlen(f)+1+STATMAX+1; /* plenty! */
name = malloc(nname); name = malloc(nname);
if(name == 0){ if(name == 0){
err("memory allocation"); err(-1, "memory allocation");
return; return;
} }
ndir = 0; ndir = 0;
for(i=0; i<n; i++){ for(i=0; i<n; i++){
snprint(name, nname, "%s/%s", f, dirbuf[i].name); snprint(name, nname, "%s/%s", f, dirbuf[i].name);
if(remove(name) != -1) if((e = remove(name)) != -1)
dirbuf[i].qid.type = QTFILE; /* so we won't recurse */ dirbuf[i].qid.type = QTFILE; /* so we won't recurse */
else{ else{
if(dirbuf[i].qid.type & QTDIR) if(dirbuf[i].qid.type & QTDIR)
ndir++; ndir++;
else else
err(name); err(e, name);
} }
} }
if(ndir) if(ndir)
@ -70,8 +74,8 @@ rmdir(char *f)
snprint(name, nname, "%s/%s", f, dirbuf[j].name); snprint(name, nname, "%s/%s", f, dirbuf[j].name);
rmdir(name); rmdir(name);
} }
if(remove(f) == -1) if((e = remove(f)) == -1)
err(f); err(e, f);
free(name); free(name);
free(dirbuf); free(dirbuf);
} }
@ -80,6 +84,7 @@ main(int argc, char *argv[])
{ {
int i; int i;
int recurse; int recurse;
long e;
char *f; char *f;
Dir *db; Dir *db;
@ -92,19 +97,25 @@ main(int argc, char *argv[])
case 'f': case 'f':
ignerr = 1; ignerr = 1;
break; break;
case 'e':
printerr = 1;
break;
default: default:
fprint(2, "usage: rm [-fr] file ...\n"); fprint(2, "usage: rm [-fr|-e] file ...\n");
exits("usage"); exits("usage");
}ARGEND }ARGEND
if(printerr)
ignerr = 0;
for(i=0; i<argc; i++){ for(i=0; i<argc; i++){
f = argv[i]; f = argv[i];
if(remove(f) != -1) e = remove(f);
if(e != -1 && (!printerr || e == 0))
continue; continue;
db = nil; db = nil;
if(recurse && (db=dirstat(f))!=nil && (db->qid.type&QTDIR)) if(recurse && (db=dirstat(f))!=nil && (db->qid.type&QTDIR))
rmdir(f); rmdir(f);
else else
err(f); err(e, f);
free(db); free(db);
} }
exits(errbuf); exits(errbuf);