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bug and style fixes in find

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1) don't mix declarations and code (leave recursion alone for now as I
plan on changing/using recurse)
2) change **argv to *argv[]
3) check for error on fork()
This commit is contained in:
Evan Gates 2015-03-06 09:47:07 -08:00 committed by sin
parent e37e3e916a
commit d21a958d88
1 changed files with 68 additions and 61 deletions
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129
find.c
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@ -134,20 +134,20 @@ static int pri_newer (Arg *arg);
static int pri_depth (Arg *arg); static int pri_depth (Arg *arg);
/* Getargs */ /* Getargs */
static char **get_name_arg (char **argv, Extra *extra); static char **get_name_arg (char *argv[], Extra *extra);
static char **get_path_arg (char **argv, Extra *extra); static char **get_path_arg (char *argv[], Extra *extra);
static char **get_xdev_arg (char **argv, Extra *extra); static char **get_xdev_arg (char *argv[], Extra *extra);
static char **get_perm_arg (char **argv, Extra *extra); static char **get_perm_arg (char *argv[], Extra *extra);
static char **get_type_arg (char **argv, Extra *extra); static char **get_type_arg (char *argv[], Extra *extra);
static char **get_n_arg (char **argv, Extra *extra); static char **get_n_arg (char *argv[], Extra *extra);
static char **get_user_arg (char **argv, Extra *extra); static char **get_user_arg (char *argv[], Extra *extra);
static char **get_group_arg(char **argv, Extra *extra); static char **get_group_arg(char *argv[], Extra *extra);
static char **get_size_arg (char **argv, Extra *extra); static char **get_size_arg (char *argv[], Extra *extra);
static char **get_exec_arg (char **argv, Extra *extra); static char **get_exec_arg (char *argv[], Extra *extra);
static char **get_ok_arg (char **argv, Extra *extra); static char **get_ok_arg (char *argv[], Extra *extra);
static char **get_print_arg(char **argv, Extra *extra); static char **get_print_arg(char *argv[], Extra *extra);
static char **get_newer_arg(char **argv, Extra *extra); static char **get_newer_arg(char *argv[], Extra *extra);
static char **get_depth_arg(char **argv, Extra *extra); static char **get_depth_arg(char *argv[], Extra *extra);
/* Freeargs */ /* Freeargs */
static void free_extra (Extra extra); static void free_extra (Extra extra);
@ -348,27 +348,31 @@ static int
pri_exec(Arg *arg) pri_exec(Arg *arg)
{ {
int status; int status;
size_t len;
pid_t pid; pid_t pid;
char **sp, ***brace;
Execarg *e = arg->extra.p; Execarg *e = arg->extra.p;
if (e->isplus) { if (e->isplus) {
size_t len = strlen(arg->path) + 1; len = strlen(arg->path) + 1;
/* if we reached ARG_MAX, fork, exec, wait, free file names, reset list */ /* if we reached ARG_MAX, fork, exec, wait, free file names, reset list */
if (len + e->u.p.arglen + e->u.p.filelen + envlen > argmax) { if (len + e->u.p.arglen + e->u.p.filelen + envlen > argmax) {
char **arg;
e->argv[e->u.p.next] = NULL; e->argv[e->u.p.next] = NULL;
if (!(pid = fork())) { /* child */ switch((pid = fork())) {
case -1:
eprintf("fork:");
case 0:
execvp(*e->argv, e->argv); execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv); weprintf("exec %s failed:", *e->argv);
_exit(1);
} }
waitpid(pid, &status, 0); waitpid(pid, &status, 0);
gflags.ret |= status; gflags.ret = gflags.ret || status;
for (arg = e->argv + e->u.p.first; *arg; arg++) for (sp = e->argv + e->u.p.first; *sp; sp++)
free(*arg); free(*sp);
e->u.p.next = e->u.p.first; e->u.p.next = e->u.p.first;
e->u.p.filelen = 0; e->u.p.filelen = 0;
@ -378,22 +382,22 @@ pri_exec(Arg *arg)
if (e->u.p.next + 1 == e->u.p.cap) if (e->u.p.next + 1 == e->u.p.cap)
e->argv = erealloc(e->argv, (e->u.p.cap *= 2) * sizeof(*e->argv)); e->argv = erealloc(e->argv, (e->u.p.cap *= 2) * sizeof(*e->argv));
/* FIXME: we can do better than strdup and free for every single file
* name. do we care? use strlacat/strlacpy from sed? */
e->argv[e->u.p.next++] = estrdup(arg->path); e->argv[e->u.p.next++] = estrdup(arg->path);
e->u.p.filelen += len + sizeof(arg->path); e->u.p.filelen += len + sizeof(arg->path);
return 1; return 1;
} else { } else {
char ***brace;
/* insert path everywhere user gave us {} */ /* insert path everywhere user gave us {} */
for (brace = e->u.s.braces; *brace; brace++) for (brace = e->u.s.braces; *brace; brace++)
**brace = arg->path; **brace = arg->path;
if (!(pid = fork())) { /* child */ switch((pid = fork())) {
case -1:
eprintf("fork:");
case 0:
execvp(*e->argv, e->argv); execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv); weprintf("exec %s failed:", *e->argv);
_exit(1);
} }
/* FIXME: propper course of action for all waitpid() on EINTR? */ /* FIXME: propper course of action for all waitpid() on EINTR? */
waitpid(pid, &status, 0); waitpid(pid, &status, 0);
@ -405,8 +409,8 @@ static int
pri_ok(Arg *arg) pri_ok(Arg *arg)
{ {
int status; int status;
char ***brace, reply, buf[256];
pid_t pid; pid_t pid;
char ***brace, reply, buf[256];
Okarg *o = arg->extra.p; Okarg *o = arg->extra.p;
fprintf(stderr, "%s: %s ?", *o->argv, arg->path); fprintf(stderr, "%s: %s ?", *o->argv, arg->path);
@ -428,9 +432,13 @@ pri_ok(Arg *arg)
for (brace = o->braces; *brace; brace++) for (brace = o->braces; *brace; brace++)
**brace = arg->path; **brace = arg->path;
if (!(pid = fork())) { /* child */ switch((pid = fork())) {
case -1:
eprintf("fork:");
case 0:
execvp(*o->argv, o->argv); execvp(*o->argv, o->argv);
eprintf("exec %s failed:", *o->argv); weprintf("exec %s failed:", *o->argv);
_exit(1);
} }
waitpid(pid, &status, 0); waitpid(pid, &status, 0);
return !!status; return !!status;
@ -463,28 +471,28 @@ pri_depth(Arg *arg)
* return pointer to last argument, the pointer will be incremented in parse() * return pointer to last argument, the pointer will be incremented in parse()
*/ */
static char ** static char **
get_name_arg(char **argv, Extra *extra) get_name_arg(char *argv[], Extra *extra)
{ {
extra->p = *argv; extra->p = *argv;
return argv; return argv;
} }
static char ** static char **
get_path_arg(char **argv, Extra *extra) get_path_arg(char *argv[], Extra *extra)
{ {
extra->p = *argv; extra->p = *argv;
return argv; return argv;
} }
static char ** static char **
get_xdev_arg(char **argv, Extra *extra) get_xdev_arg(char *argv[], Extra *extra)
{ {
gflags.xdev = 1; gflags.xdev = 1;
return argv; return argv;
} }
static char ** static char **
get_perm_arg(char **argv, Extra *extra) get_perm_arg(char *argv[], Extra *extra)
{ {
Permarg *p = extra->p = emalloc(sizeof(*p)); Permarg *p = extra->p = emalloc(sizeof(*p));
@ -499,7 +507,7 @@ get_perm_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_type_arg(char **argv, Extra *extra) get_type_arg(char *argv[], Extra *extra)
{ {
if (!strchr("bcdlpfs", **argv)) if (!strchr("bcdlpfs", **argv))
eprintf("invalid type %c for -type primary\n", **argv); eprintf("invalid type %c for -type primary\n", **argv);
@ -509,7 +517,7 @@ get_type_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_n_arg(char **argv, Extra *extra) get_n_arg(char *argv[], Extra *extra)
{ {
Narg *n = extra->p = emalloc(sizeof(*n)); Narg *n = extra->p = emalloc(sizeof(*n));
fill_narg(*argv, n); fill_narg(*argv, n);
@ -517,7 +525,7 @@ get_n_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_user_arg(char **argv, Extra *extra) get_user_arg(char *argv[], Extra *extra)
{ {
char *end; char *end;
struct passwd *p = getpwnam(*argv); struct passwd *p = getpwnam(*argv);
@ -533,7 +541,7 @@ get_user_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_group_arg(char **argv, Extra *extra) get_group_arg(char *argv[], Extra *extra)
{ {
char *end; char *end;
struct group *g = getgrnam(*argv); struct group *g = getgrnam(*argv);
@ -549,7 +557,7 @@ get_group_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_size_arg(char **argv, Extra *extra) get_size_arg(char *argv[], Extra *extra)
{ {
char *p = *argv + strlen(*argv); char *p = *argv + strlen(*argv);
Sizearg *s = extra->p = emalloc(sizeof(*s)); Sizearg *s = extra->p = emalloc(sizeof(*s));
@ -562,9 +570,9 @@ get_size_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_exec_arg(char **argv, Extra *extra) get_exec_arg(char *argv[], Extra *extra)
{ {
char **arg; char **arg, **new, ***braces;
int nbraces = 0; int nbraces = 0;
Execarg *e = extra->p = emalloc(sizeof(*e)); Execarg *e = extra->p = emalloc(sizeof(*e));
@ -583,8 +591,6 @@ get_exec_arg(char **argv, Extra *extra)
*arg = NULL; *arg = NULL;
if (e->isplus) { if (e->isplus) {
char **new;
*(arg - 1) = NULL; /* don't need the {} in there now */ *(arg - 1) = NULL; /* don't need the {} in there now */
e->u.p.arglen = e->u.p.filelen = 0; e->u.p.arglen = e->u.p.filelen = 0;
e->u.p.first = e->u.p.next = arg - argv - 1; e->u.p.first = e->u.p.next = arg - argv - 1;
@ -597,8 +603,6 @@ get_exec_arg(char **argv, Extra *extra)
} }
arg++; /* due to our extra NULL */ arg++; /* due to our extra NULL */
} else { } else {
char ***braces;
e->argv = argv; e->argv = argv;
e->u.s.braces = emalloc(++nbraces * sizeof(*e->u.s.braces)); /* ++ for NULL */ e->u.s.braces = emalloc(++nbraces * sizeof(*e->u.s.braces)); /* ++ for NULL */
@ -611,7 +615,7 @@ get_exec_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_ok_arg(char **argv, Extra *extra) get_ok_arg(char *argv[], Extra *extra)
{ {
char **arg, ***braces; char **arg, ***braces;
int nbraces = 0; int nbraces = 0;
@ -639,7 +643,7 @@ get_ok_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_print_arg(char **argv, Extra *extra) get_print_arg(char *argv[], Extra *extra)
{ {
gflags.print = 0; gflags.print = 0;
return argv; return argv;
@ -647,7 +651,7 @@ get_print_arg(char **argv, Extra *extra)
/* FIXME: ignoring nanoseconds */ /* FIXME: ignoring nanoseconds */
static char ** static char **
get_newer_arg(char **argv, Extra *extra) get_newer_arg(char *argv[], Extra *extra)
{ {
struct stat st; struct stat st;
@ -659,7 +663,7 @@ get_newer_arg(char **argv, Extra *extra)
} }
static char ** static char **
get_depth_arg(char **argv, Extra *extra) get_depth_arg(char *argv[], Extra *extra)
{ {
gflags.depth = 1; gflags.depth = 1;
return argv; return argv;
@ -677,26 +681,28 @@ free_extra(Extra extra)
static void static void
free_exec_arg(Extra extra) free_exec_arg(Extra extra)
{ {
int status;
pid_t pid;
char **arg;
Execarg *e = extra.p; Execarg *e = extra.p;
if (!e->isplus) { if (!e->isplus) {
free(e->u.s.braces); free(e->u.s.braces);
} else { } else {
char **arg;
e->argv[e->u.p.next] = NULL; e->argv[e->u.p.next] = NULL;
/* if we have files, do the last exec */ /* if we have files, do the last exec */
if (e->u.p.first != e->u.p.next) { if (e->u.p.first != e->u.p.next) {
int status; switch((pid = fork())) {
pid_t pid = fork(); case -1:
eprintf("fork:");
if (!pid) { /* child */ case 0:
execvp(*e->argv, e->argv); execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv); weprintf("exec %s failed:", *e->argv);
_exit(1);
} }
waitpid(pid, &status, 0); waitpid(pid, &status, 0);
gflags.ret |= status; gflags.ret = gflags.ret || status;
} }
for (arg = e->argv + e->u.p.first; *arg; arg++) for (arg = e->argv + e->u.p.first; *arg; arg++)
free(*arg); free(*arg);
@ -766,9 +772,11 @@ find_op(char *name)
static void static void
parse(int argc, char **argv) parse(int argc, char **argv)
{ {
int lasttype = -1;
Tok infix[2 * argc + 1], *stack[argc], *tok, *rpn, *out, **top; Tok infix[2 * argc + 1], *stack[argc], *tok, *rpn, *out, **top;
Op_info *op;
Pri_info *pri;
char **arg; char **arg;
int lasttype = -1;
size_t ntok = 0; size_t ntok = 0;
Tok and = { .u.oinfo = find_op("-a"), .type = AND }; Tok and = { .u.oinfo = find_op("-a"), .type = AND };
@ -776,8 +784,7 @@ parse(int argc, char **argv)
/* convert argv to infix expression of Tok, inserting in *tok */ /* convert argv to infix expression of Tok, inserting in *tok */
for (arg = argv, tok = infix; *arg; arg++, tok++) { for (arg = argv, tok = infix; *arg; arg++, tok++) {
Op_info *op; pri = find_primary(*arg);
Pri_info *pri = find_primary(*arg);
if (pri) { /* token is a primary, fill out Tok and get arguments */ if (pri) { /* token is a primary, fill out Tok and get arguments */
if (lasttype == PRIM || lasttype == RPAR) { if (lasttype == PRIM || lasttype == RPAR) {