contrib/, lib/, src/: Use consistent style using strchr(3) in conditi…

…onals

For negative matches, use
	if (strchr(...) == NULL)

For positive matches, use the cast-to-bool operator:
	if (!!strchr(...))

For positive matches, when a variable is also set, use
	while (NULL != (p = strchr(...)))

Signed-off-by: Alejandro Colomar <[email protected]>

contrib/adduser.c

@@ -224,7 +224,7 @@ main (void)
 	      printf ("That name is in use, choose another.\n");
 	      done = 0;
 	    }
-	  else if (strchr (usrname, ' ') != NULL)
+	  else if (!!strchr(usrname, ' '))
 	    {
 	      printf ("No spaces in username!!\n");
 	      done = 0;

lib/env.c

@@ -202,7 +202,8 @@ void set_env (int argc, char *const *argv)
  * but... I feel better with that silly precaution. -j.
  */
 
-void sanitize_env (void)
+void
+sanitize_env(void)
 {
 	char **envp = environ;
 	const char *const *bad;
@@ -226,9 +227,9 @@ void sanitize_env (void)
 			if (!strprefix(*cur, *bad)) {
 				continue;
 			}
-			if (strchr (*cur, '/') == NULL) {
+			if (strchr(*cur, '/') == NULL)
 				continue;	/* OK */
-			}
+
 			for (move = cur; NULL != *move; move++) {
 				*move = *(move + 1);
 			}

lib/obscure.c

@@ -14,6 +14,7 @@
 
 #include <ctype.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "attr.h"
 #include "prototypes.h"
@@ -51,7 +52,8 @@ static bool palindrome (MAYBE_UNUSED const char *old, const char *new)
  * more than half of the characters are different ones.
  */
 
-static bool similar (/*@notnull@*/const char *old, /*@notnull@*/const char *new)
+static bool
+similar(/*@notnull@*/const char *old, /*@notnull@*/const char *new)
 {
 	int i, j;
 
@@ -66,9 +68,8 @@ static bool similar (/*@notnull@*/const char *old, /*@notnull@*/const char *new)
 	}
 
 	for (i = j = 0; ('\0' != new[i]) && ('\0' != old[i]); i++) {
-		if (strchr (new, old[i]) != NULL) {
+		if (!!strchr(new, old[i]))
 			j++;
-		}
 	}
 
 	if (i >= j * 2) {

lib/setupenv.c

@@ -234,7 +234,7 @@ void setup_env (struct passwd *info)
 	if (NULL == cp) {
 		/* not specified, use a minimal default */
 		addenv ((info->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
-	} else if (strchr (cp, '=')) {
+	} else if (!!strchr(cp, '=')) {
 		/* specified as name=value (PATH=...) */
 		addenv (cp, NULL);
 	} else {

lib/tcbfuncs.c

@@ -176,7 +176,8 @@ static /*@null@*/ char *shadowtcb_path_existing (const char *name)
 	return ret;
 }
 
-static shadowtcb_status mkdir_leading (const char *name, uid_t uid)
+static shadowtcb_status
+mkdir_leading(const char *name, uid_t uid)
 {
 	char *ind, *dir, *ptr, *path = shadowtcb_path_rel (name, uid);
 	struct stat st;
@@ -191,7 +192,7 @@ static shadowtcb_status mkdir_leading (const char *name, uid_t uid)
 		         shadow_progname, TCB_DIR, strerror (errno));
 		goto out_free_path;
 	}
-	while ((ind = strchr (ptr, '/'))) {
+	while (NULL != (ind = strchr(ptr, '/'))) {
 		stpcpy(ind, "");
 		if (asprintf (&dir, TCB_DIR "/%s", path) == -1) {
 			OUT_OF_MEMORY;

src/chfn.c

@@ -15,6 +15,7 @@
 #include <pwd.h>
 #include <signal.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <getopt.h>
 
@@ -124,7 +125,8 @@ usage (int status)
  *
  *	Return true if the user can change the field and false otherwise.
  */
-static bool may_change_field (int field)
+static bool
+may_change_field(int field)
 {
 	const char *cp;
 
@@ -158,9 +160,8 @@ static bool may_change_field (int field)
 		cp = "frwh";
 	}
 
-	if (strchr (cp, field) != NULL) {
+	if (!!strchr(cp, field))
 		return true;
-	}
 
 	return false;
 }

src/chpasswd.c

@@ -16,6 +16,7 @@
 #include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #ifdef USE_PAM
 #include "pam_defs.h"
@@ -440,12 +441,12 @@ static const char *get_salt(void)
 	return crypt_make_salt (crypt_method, arg);
 }
 
-int main (int argc, char **argv)
+int
+main(int argc, char **argv)
 {
 	char buf[BUFSIZ];
 	char *name;
 	char *newpwd;
-	char *cp;
 	const char *salt;
 
 #ifdef USE_PAM
@@ -502,15 +503,15 @@ int main (int argc, char **argv)
 	 * present.
 	 */
 	while (fgets (buf, sizeof buf, stdin) != NULL) {
+		char  *cp;
+
 		line++;
 		if (stpsep(buf, "\n") == NULL) {
 			if (feof (stdin) == 0) {
 				// Drop all remaining characters on this line.
 				while (fgets (buf, sizeof buf, stdin) != NULL) {
-					cp = strchr (buf, '\n');
-					if (cp != NULL) {
+					if (!!strchr(buf, '\n'))
 						break;
-					}
 				}
 
 				fprintf (stderr,

src/login_nopam.c

@@ -317,9 +317,8 @@ static bool from_match (const char *tok, const char *string)
 			return true;
 		}
 	} else if (strcasecmp (tok, "LOCAL") == 0) {	/* local: no dots */
-		if (strchr (string, '.') == NULL) {
+		if (strchr(string, '.') == NULL)
 			return true;
-		}
 	} else if (   (!streq(tok, "") && tok[strlen(tok) - 1] == '.') /* network */
 		   && strprefix(resolve_hostname(string), tok)) {
 		return true;

src/su.c

@@ -882,7 +882,8 @@ static void process_flags (int argc, char **argv)
 	}
 }
 
-static void set_environment (struct passwd *pw)
+static void
+set_environment(struct passwd *pw)
 {
 	const char *cp;
 	/*
@@ -950,7 +951,7 @@ static void set_environment (struct passwd *pw)
 	cp = getdef_str ((pw->pw_uid == 0) ? "ENV_SUPATH" : "ENV_PATH");
 	if (NULL == cp) {
 		addenv ((pw->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
-	} else if (strchr (cp, '=') != NULL) {
+	} else if (!!strchr(cp, '=')) {
 		addenv (cp, NULL);
 	} else {
 		addenv ("PATH", cp);