a bunch of cleanup
This commit is contained in:
Evan Gates
sin
parent
e427364a28
commit
3eed1fced6
188
find.c
188
find.c
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@ -35,6 +35,7 @@ typedef struct {
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int (*func)(Arg *arg);
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char **(*getarg)(char **argv, Extra *extra);
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void (*freearg)(Extra extra);
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char narg; /* -xdev, -depth, -print don't take args but have getarg() */
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} Pri_info;
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/* Information about operators, for lookup table */
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@ -135,6 +136,7 @@ static int pri_depth (Arg *arg);
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/* Getargs */
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static char **get_name_arg (char **argv, Extra *extra);
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static char **get_path_arg (char **argv, Extra *extra);
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static char **get_xdev_arg (char **argv, Extra *extra);
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static char **get_perm_arg (char **argv, Extra *extra);
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static char **get_type_arg (char **argv, Extra *extra);
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static char **get_n_arg (char **argv, Extra *extra);
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@ -143,7 +145,9 @@ static char **get_group_arg(char **argv, Extra *extra);
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static char **get_size_arg (char **argv, Extra *extra);
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static char **get_exec_arg (char **argv, Extra *extra);
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static char **get_ok_arg (char **argv, Extra *extra);
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static char **get_print_arg(char **argv, Extra *extra);
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static char **get_newer_arg(char **argv, Extra *extra);
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static char **get_depth_arg(char **argv, Extra *extra);
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/* Freeargs */
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static void free_extra (Extra extra);
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@ -151,6 +155,7 @@ static void free_exec_arg(Extra extra);
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static void free_ok_arg (Extra extra);
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/* Parsing/Building/Running */
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static void fill_narg(char *s, Narg *n);
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static Pri_info *find_primary(char *name);
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static Op_info *find_op(char *name);
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static void parse(int argc, char **argv);
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@ -165,28 +170,28 @@ static int cmp_lt(int a, int b) { return a < b; }
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/* order from find(1p), may want to alphabetize */
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static Pri_info primaries[] = {
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{ "-name" , pri_name , get_name_arg , NULL },
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{ "-path" , pri_path , get_path_arg , NULL },
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{ "-nouser" , pri_nouser , NULL , NULL },
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{ "-nogroup", pri_nogroup, NULL , NULL },
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{ "-xdev" , pri_xdev , NULL , NULL },
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{ "-prune" , pri_prune , NULL , NULL },
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{ "-perm" , pri_perm , get_perm_arg , free_extra },
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{ "-type" , pri_type , get_type_arg , NULL },
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{ "-links" , pri_links , get_n_arg , free_extra },
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{ "-user" , pri_user , get_user_arg , NULL },
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{ "-group" , pri_group , get_group_arg, NULL },
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{ "-size" , pri_size , get_size_arg , free_extra },
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{ "-atime" , pri_atime , get_n_arg , free_extra },
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{ "-ctime" , pri_ctime , get_n_arg , free_extra },
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{ "-mtime" , pri_mtime , get_n_arg , free_extra },
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{ "-exec" , pri_exec , get_exec_arg , free_exec_arg },
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{ "-ok" , pri_ok , get_ok_arg , free_ok_arg },
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{ "-print" , pri_print , NULL , NULL },
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{ "-newer" , pri_newer , get_newer_arg, NULL },
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{ "-depth" , pri_depth , NULL , NULL },
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{ "-name" , pri_name , get_name_arg , NULL , 1 },
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{ "-path" , pri_path , get_path_arg , NULL , 1 },
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{ "-nouser" , pri_nouser , NULL , NULL , 1 },
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{ "-nogroup", pri_nogroup, NULL , NULL , 1 },
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{ "-xdev" , pri_xdev , get_xdev_arg , NULL , 0 },
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{ "-prune" , pri_prune , NULL , NULL , 1 },
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{ "-perm" , pri_perm , get_perm_arg , free_extra , 1 },
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{ "-type" , pri_type , get_type_arg , NULL , 1 },
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{ "-links" , pri_links , get_n_arg , free_extra , 1 },
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{ "-user" , pri_user , get_user_arg , NULL , 1 },
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{ "-group" , pri_group , get_group_arg, NULL , 1 },
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{ "-size" , pri_size , get_size_arg , free_extra , 1 },
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{ "-atime" , pri_atime , get_n_arg , free_extra , 1 },
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{ "-ctime" , pri_ctime , get_n_arg , free_extra , 1 },
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{ "-mtime" , pri_mtime , get_n_arg , free_extra , 1 },
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{ "-exec" , pri_exec , get_exec_arg , free_exec_arg, 1 },
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{ "-ok" , pri_ok , get_ok_arg , free_ok_arg , 1 },
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{ "-print" , pri_print , get_print_arg, NULL , 0 },
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{ "-newer" , pri_newer , get_newer_arg, NULL , 1 },
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{ "-depth" , pri_depth , get_depth_arg, NULL , 0 },
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{ NULL, NULL, NULL, NULL }
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{ NULL, NULL, NULL, NULL, 0 }
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};
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static Op_info ops[] = {
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@ -216,6 +221,7 @@ static struct {
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char l ; /* -L, follow all symlinks (command line and search) */
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char prune; /* hit -prune */
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char xdev ; /* -xdev, prune directories on different devices */
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char print; /* whether we will need -print when parsing */
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} gflags;
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/*
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@ -341,17 +347,16 @@ pri_mtime(Arg *arg)
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static int
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pri_exec(Arg *arg)
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{
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int status;
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pid_t pid;
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Execarg *e = arg->extra.p;
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if (e->isplus) {
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size_t len = strlen(arg->path) + 1;
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/* if we've reached ARG_MAX, fork, exec, wait, free file names, reset
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* list */
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/* if we reached ARG_MAX, fork, exec, wait, free file names, reset list */
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if (len + e->u.p.arglen + e->u.p.filelen + envlen > argmax) {
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char **arg;
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int status;
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pid_t pid;
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e->argv[e->u.p.next] = NULL;
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@ -369,8 +374,7 @@ pri_exec(Arg *arg)
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e->u.p.filelen = 0;
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}
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/* if we have too many filenames, realloc (with space for NULL
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* termination) */
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/* if we have too many files, realloc (with space for NULL termination) */
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if (e->u.p.next + 1 == e->u.p.cap)
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e->argv = erealloc(e->argv, (e->u.p.cap *= 2) * sizeof(*e->argv));
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@ -381,9 +385,7 @@ pri_exec(Arg *arg)
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return 1;
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} else {
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int status;
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char ***brace;
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pid_t pid;
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/* insert path everywhere user gave us {} */
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for (brace = e->u.s.braces; *brace; brace++)
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@ -416,13 +418,13 @@ pri_ok(Arg *arg)
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* byte? probably shouldn't juse fgets() */
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;
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if (feof(stdin)) /* ferror()? */
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if (feof(stdin)) /* FIXME: ferror()? */
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clearerr(stdin);
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if (reply != 'y' && reply != 'Y')
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return 0;
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/* insert filename everywhere use gave us {} */
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/* insert filename everywhere user gave us {} */
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for (brace = o->braces; *brace; brace++)
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**brace = arg->path;
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@ -437,7 +439,8 @@ pri_ok(Arg *arg)
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static int
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pri_print(Arg *arg)
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{
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puts(arg->path);
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if (puts(arg->path) == EOF)
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eprintf("puts failed:");
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return 1;
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}
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@ -473,10 +476,17 @@ get_path_arg(char **argv, Extra *extra)
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return argv;
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}
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static char **
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get_xdev_arg(char **argv, Extra *extra)
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{
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gflags.xdev = 1;
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return argv;
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}
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static char **
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get_perm_arg(char **argv, Extra *extra)
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{
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Permarg *p = emalloc(sizeof(*p));
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Permarg *p = extra->p = emalloc(sizeof(*p));
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if (**argv == '-')
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(*argv)++;
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@ -484,7 +494,6 @@ get_perm_arg(char **argv, Extra *extra)
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p->exact = 1;
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p->mode = parsemode(*argv, 0, 0);
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extra->p = p;
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return argv;
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}
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@ -502,20 +511,8 @@ get_type_arg(char **argv, Extra *extra)
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static char **
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get_n_arg(char **argv, Extra *extra)
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{
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Narg *n = emalloc(sizeof(*n));
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char *end;
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switch (**argv) {
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case '+': n->cmp = cmp_gt; (*argv)++; break;
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case '-': n->cmp = cmp_lt; (*argv)++; break;
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default : n->cmp = cmp_eq; break;
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}
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n->n = strtol(*argv, &end, 10);
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if (end == *argv || *end)
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eprintf("bad number '%s'\n", *argv);
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extra->p = n;
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Narg *n = extra->p = emalloc(sizeof(*n));
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fill_narg(*argv, n);
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return argv;
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}
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@ -554,27 +551,13 @@ get_group_arg(char **argv, Extra *extra)
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static char **
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get_size_arg(char **argv, Extra *extra)
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{
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char *end;
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char *p = *argv + strlen(*argv);
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Sizearg *s = emalloc(sizeof(*s));
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Sizearg *s = extra->p = emalloc(sizeof(*s));
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/* if the number is followed by 'c', the size will by in bytes */
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s->bytes = p > *argv && *--p == 'c';
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if (s->bytes)
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if ((s->bytes = (p > *argv && *--p == 'c')))
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*p = '\0';
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/* FIXME: no need to have this in get_n_arg and here */
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switch (**argv) {
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case '+': s->n.cmp = cmp_gt; (*argv)++; break;
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case '-': s->n.cmp = cmp_lt; (*argv)++; break;
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default : s->n.cmp = cmp_eq; break;
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}
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s->n.n = strtol(*argv, &end, 10);
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if (end == *argv || *end)
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eprintf("bad number '%s'\n", *argv);
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extra->p = s;
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fill_narg(*argv, &s->n);
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return argv;
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}
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@ -583,7 +566,7 @@ get_exec_arg(char **argv, Extra *extra)
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{
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char **arg;
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int nbraces = 0;
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Execarg *e = emalloc(sizeof(*e));
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Execarg *e = extra->p = emalloc(sizeof(*e));
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for (arg = argv; *arg; arg++)
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if (!strcmp(*arg, ";"))
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@ -623,7 +606,7 @@ get_exec_arg(char **argv, Extra *extra)
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if (!strcmp(*arg, "{}"))
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*braces++ = arg;
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}
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extra->p = e;
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gflags.print = 0;
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return arg;
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}
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@ -632,7 +615,7 @@ get_ok_arg(char **argv, Extra *extra)
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{
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char **arg, ***braces;
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int nbraces = 0;
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Okarg *o = emalloc(sizeof(*o));
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Okarg *o = extra->p = emalloc(sizeof(*o));
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for (arg = argv; *arg; arg++)
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if (!strcmp(*arg, ";"))
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@ -651,10 +634,17 @@ get_ok_arg(char **argv, Extra *extra)
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if (!strcmp(*arg, "{}"))
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*braces++ = arg;
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extra->p = o;
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gflags.print = 0;
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return arg;
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}
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static char **
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get_print_arg(char **argv, Extra *extra)
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{
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gflags.print = 0;
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return argv;
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}
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/* FIXME: ignoring nanoseconds */
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static char **
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get_newer_arg(char **argv, Extra *extra)
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@ -668,6 +658,13 @@ get_newer_arg(char **argv, Extra *extra)
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return argv;
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}
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static char **
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get_depth_arg(char **argv, Extra *extra)
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{
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gflags.depth = 1;
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return argv;
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}
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/*
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* Freeargs
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*/
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@ -681,6 +678,7 @@ static void
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free_exec_arg(Extra extra)
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{
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Execarg *e = extra.p;
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if (!e->isplus) {
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free(e->u.s.braces);
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} else {
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@ -711,6 +709,7 @@ static void
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free_ok_arg(Extra extra)
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{
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Okarg *o = extra.p;
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free(o->braces);
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free(o);
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}
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@ -718,6 +717,21 @@ free_ok_arg(Extra extra)
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/*
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* Parsing/Building/Running
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*/
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static void
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fill_narg(char *s, Narg *n)
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{
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char *end;
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switch (*s) {
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case '+': n->cmp = cmp_gt; s++; break;
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case '-': n->cmp = cmp_lt; s++; break;
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default : n->cmp = cmp_eq; break;
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}
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n->n = strtol(s, &end, 10);
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if (end == s || *end)
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eprintf("bad number '%s'\n", s);
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}
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static Pri_info *
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find_primary(char *name)
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{
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@ -756,37 +770,27 @@ parse(int argc, char **argv)
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Tok infix[2 * argc + 1], *stack[argc], *tok, *rpn, *out, **top;
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char **arg;
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size_t ntok = 0;
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int print = 1;
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Tok and = { .u.oinfo = find_op("-a"), .type = AND };
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gflags.print = 1;
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/* convert argv to infix expression of Tok, inserting in *tok */
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for (arg = argv, tok = infix; *arg; arg++, tok++) {
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Op_info *op;
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Pri_info *pri = find_primary(*arg);
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if (pri) { /* token is a primary, fill out Tok and get arguments */
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/* FIXME: should never have to ask "which primary is this?" Should
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* probably move this into getarg even though there's no arg */
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if (pri->func == pri_depth)
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gflags.depth = 1;
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else if (pri->func == pri_xdev)
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gflags.xdev = 1;
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else if (pri->func == pri_exec || pri->func == pri_ok || pri->func == pri_print)
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print = 0;
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if (lasttype == PRIM || lasttype == RPAR) {
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*tok++ = and;
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ntok++;
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}
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if (pri->getarg) {
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if (!*++arg)
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if (pri->narg && !*++arg)
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eprintf("no argument for primary %s\n", pri->name);
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arg = pri->getarg(arg, &tok->extra);
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}
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tok->u.pinfo = pri;
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tok->type = PRIM;
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} else if ((op = find_op(*arg))) { /* token is an operator */
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if (lasttype == LPAR && op->type == RPAR)
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eprintf("empty parens\n");
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@ -796,7 +800,6 @@ parse(int argc, char **argv)
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}
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tok->type = op->type;
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tok->u.oinfo = op;
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} else { /* token is neither primary nor operator, must be path in the wrong place */
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eprintf("paths must precede expression: %s\n", *arg);
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}
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@ -807,15 +810,14 @@ parse(int argc, char **argv)
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tok->type = END;
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ntok++;
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if (print && (arg != argv)) /* need to add -a -print (not just -print) */
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print++;
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if (gflags.print && (arg != argv)) /* need to add -a -print (not just -print) */
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gflags.print++;
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/* use shunting-yard to convert from infix to rpn
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* https://en.wikipedia.org/wiki/Shunting-yard_algorithm
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* read from infix, resulting rpn ends up in rpn, next position in rpn is out
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* push operators onto stack, next position in stack is top
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*/
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rpn = emalloc((ntok + print) * sizeof(*rpn));
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* push operators onto stack, next position in stack is top */
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rpn = emalloc((ntok + gflags.print) * sizeof(*rpn));
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for (tok = infix, out = rpn, top = stack; tok->type != END; tok++) {
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switch (tok->type) {
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case PRIM: *out++ = *tok; break;
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@ -851,11 +853,10 @@ parse(int argc, char **argv)
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/* if there was no expression, use -print
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* if there was an expression but no -print, -exec, or -ok, add -a -print
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* in rpn, not infix
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*/
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if (print)
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* in rpn, not infix */
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if (gflags.print)
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*out++ = (Tok){ .u.pinfo = find_primary("-print"), .type = PRIM };
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if (print == 2)
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if (gflags.print == 2)
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*out++ = and;
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out->type = END;
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@ -864,8 +865,7 @@ parse(int argc, char **argv)
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* values are pushed onto stack, operators pop values off stack into left
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* and right pointers, pushing operator node back onto stack
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* could probably just do this during shunting-yard, but this is simpler
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* code IMO
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*/
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* code IMO */
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for (tok = rpn, top = stack; tok->type != END; tok++) {
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if (tok->type == PRIM) {
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*top++ = tok;
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Reference in New Issue