commit 639a74a5379a892c3cdc8696357b4f271421923a
parent 9048b542c773d24630c03fd7cc58777ad1c51df4
Author: Evan Gates <evan.gates@gmail.com>
Date: Fri, 20 Feb 2015 17:30:28 -0800
find: Change execv to execvp
- Make globals static
- Fix a comment
- Change some data types
- Rearrange struct members from largest to smallest
(no affect due to small structs, good practice)
Diffstat:
| M | find.c | | | 68 | +++++++++++++++++++++++++++++++++----------------------------------- |
1 file changed, 33 insertions(+), 35 deletions(-)
diff --git a/find.c b/find.c
@@ -40,31 +40,31 @@ typedef struct {
/* Information about operators, for lookup table */
typedef struct {
char *name; /* string representation of op */
- int type; /* from Tok.type */
- int prec; /* precedence */
- int nargs; /* number of arguments (unary or binary) */
- int lassoc; /* left associative */
+ char type; /* from Tok.type */
+ char prec; /* precedence */
+ char nargs; /* number of arguments (unary or binary) */
+ char lassoc; /* left associative */
} Op_info;
/* Token when lexing/parsing
* (although also used for the expression tree) */
typedef struct Tok Tok;
struct Tok {
- enum {
- PRIM = 0, LPAR, RPAR, NOT, AND, OR, END
- } type;
+ Tok *left, *right; /* if (type == NOT) left = NULL */
+ Extra extra;
union {
Pri_info *pinfo; /* if (type == PRIM) */
Op_info *oinfo;
} u;
- Extra extra;
- Tok *left, *right; /* if (type == NOT) left = NULL */
+ enum {
+ PRIM = 0, LPAR, RPAR, NOT, AND, OR, END
+ } type;
};
/* structures used for Arg.extra.p and Tok.extra.p */
typedef struct {
- mode_t mode;
- unsigned char exact;
+ mode_t mode;
+ char exact;
} Permarg;
typedef struct {
@@ -83,7 +83,7 @@ typedef struct {
typedef struct {
Narg n;
- unsigned char bytes; /* size is in bytes, not 512 byte sectors */
+ char bytes; /* size is in bytes, not 512 byte sectors */
} Sizearg;
typedef struct {
@@ -99,8 +99,8 @@ typedef struct {
size_t cap; /* capacity of argv */
} p; /* plus */
} u;
- char **argv; /* NULL terminated list of arguments (allocated if isplus) */
- unsigned char isplus; /* -exec + instead of -exec ; */
+ char **argv; /* NULL terminated list of arguments (allocated if isplus) */
+ char isplus; /* -exec + instead of -exec ; */
} Execarg;
/* used to find loops while recursing through directory structure */
@@ -168,14 +168,14 @@ static int cmp_gt(int a, int b) { return a > b; }
static int cmp_eq(int a, int b) { return a == b; }
static int cmp_lt(int a, int b) { return a < b; }
-int (*cmps[])(int, int) = {
+static int (*cmps[])(int, int) = {
[GT] = cmp_gt,
[EQ] = cmp_eq,
[LT] = cmp_lt,
};
/* order from find(1p), may want to alphabetize */
-Pri_info primaries[] = {
+static Pri_info primaries[] = {
{ "-name" , pri_name , get_name_arg , NULL },
{ "-path" , pri_path , get_path_arg , NULL },
{ "-nouser" , pri_nouser , NULL , NULL },
@@ -200,7 +200,7 @@ Pri_info primaries[] = {
{ NULL, NULL, NULL, NULL }
};
-Op_info ops[] = {
+static Op_info ops[] = {
{ "(" , LPAR, 0, 0, 0 }, /* parens are handled specially */
{ ")" , RPAR, 0, 0, 0 },
{ "!" , NOT , 3, 1, 0 },
@@ -212,23 +212,21 @@ Op_info ops[] = {
extern char **environ;
-Tok *toks; /* holds allocated array of all Toks created while parsing */
-Tok *root; /* points to root of expression tree, inside toks array */
+static Tok *toks; /* holds allocated array of all Toks created while parsing */
+static Tok *root; /* points to root of expression tree, inside toks array */
-struct timespec start; /* time find was started, used for -[acm]time */
+static struct timespec start; /* time find was started, used for -[acm]time */
-size_t envlen; /* number of bytes in environ, used to calculate against ARG_MAX */
-size_t argmax; /* value of ARG_MAX retrieved using sysconf(3p) */
+static size_t envlen; /* number of bytes in environ, used to calculate against ARG_MAX */
+static size_t argmax; /* value of ARG_MAX retrieved using sysconf(3p) */
-struct {
- unsigned ret ; /* return value from main */
- unsigned depth; /* -depth, directory contents before directory itself */
- unsigned h ; /* -H, follow symlinks on command line */
- unsigned l ; /* -L, follow all symlinks (command line and search) */
- unsigned prune; /* hit -prune, eval should return STW_PRUNE (return values
- traversing expression tree are boolean so we can't
- easily return this. instead set a global flag) */
- unsigned xdev ; /* -xdev, prune directories on different devices */
+static struct {
+ char ret ; /* return value from main */
+ char depth; /* -depth, directory contents before directory itself */
+ char h ; /* -H, follow symlinks on command line */
+ char l ; /* -L, follow all symlinks (command line and search) */
+ char prune; /* hit -prune */
+ char xdev ; /* -xdev, prune directories on different devices */
} gflags;
/*
@@ -369,7 +367,7 @@ pri_exec(Arg *arg)
e->argv[e->u.p.next] = NULL;
if (!(pid = fork())) { /* child */
- execv(*e->argv, e->argv);
+ execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv);
}
waitpid(pid, &status, 0);
@@ -403,7 +401,7 @@ pri_exec(Arg *arg)
**brace = arg->path;
if (!(pid = fork())) { /* child */
- execv(*e->argv, e->argv);
+ execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv);
}
/* FIXME: propper course of action for all waitpid() on EINTR? */
@@ -440,7 +438,7 @@ pri_ok(Arg *arg)
**brace = arg->path;
if (!(pid = fork())) { /* child */
- execv(*o->argv, o->argv);
+ execvp(*o->argv, o->argv);
eprintf("exec %s failed:", *o->argv);
}
waitpid(pid, &status, 0);
@@ -707,7 +705,7 @@ free_exec_arg(Extra extra)
pid_t pid = fork();
if (!pid) { /* child */
- execv(*e->argv, e->argv);
+ execvp(*e->argv, e->argv);
eprintf("exec %s failed:", *e->argv);
}
waitpid(pid, &status, 0);
