lib/, src/: Use strprefix() instead of its pattern

Signed-off-by: Alejandro Colomar <alx@kernel.org>

contrib/adduser.c

@@ -119,6 +119,7 @@
 #include <syslog.h>
 
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 
 
 #define IMMEDIATE_CHANGE	/* Expire newly created password, must be changed
@@ -389,7 +390,7 @@ main (void)
       fflush (stdout);
       safeget (foo, sizeof (foo));
 
-      done = bad = correct = (foo[0] == 'y' || foo[0] == 'Y');
+      done = bad = correct = (strprefix(foo, "y") || strprefix(foo, "Y"));
 
       if (bad != 1)
 	printf ("\nUser [%s] not added\n", usrname);

lib/commonio.c

@@ -37,6 +37,7 @@
 #include "string/memset/memzero.h"
 #include "string/sprintf/snprintf.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -524,7 +525,7 @@ static void add_one_entry (struct commonio_db *db,
 
 static bool name_is_nis (const char *name)
 {
-	return (('+' == name[0]) || ('-' == name[0]));
+	return strprefix(name, "+") || strprefix(name, "-");
 }
 
 

lib/encrypt.c

@@ -17,6 +17,8 @@
 #include "prototypes.h"
 #include "defines.h"
 #include "shadowlog_internal.h"
+#include "string/strcmp/strprefix.h"
+
 
 /*@exposed@*//*@null@*/char *pw_encrypt (const char *clear, const char *salt)
 {
@@ -35,7 +37,7 @@
 
 	/* Some crypt() do not return NULL if the algorithm is not
 	 * supported, and return a DES encrypted password. */
-	if ((NULL != salt) && (salt[0] == '$') && (strlen (cp) <= 13))
+	if ((NULL != salt) && strprefix(salt, "$") && (strlen (cp) <= 13))
 	{
 		/*@observer@*/const char *method;
 		switch (salt[1])

lib/getdef.c

@@ -33,6 +33,7 @@
 #include "string/strchr/stpspn.h"
 #include "string/strchr/strrspn.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -567,7 +568,7 @@ static void def_load (void)
 		 * Break the line into two fields.
 		 */
 		name = stpspn(buf, " \t");	/* first nonwhite */
-		if (streq(name, "") || *name == '#')
+		if (streq(name, "") || strprefix(name, "#"))
 			continue;	/* comment or empty */
 
 		s = stpsep(name, " \t");  /* next field */

lib/limits.c

@@ -63,7 +63,7 @@ static int setrlimit_value (unsigned int resource,
 	/* The "-" is special, not belonging to a strange negative limit.
 	 * It is infinity, in a controlled way.
 	 */
-	if ('-' == value[0]) {
+	if (strprefix(value, "-")) {
 		limit = RLIM_INFINITY;
 
 	} else {
@@ -371,7 +371,7 @@ static int setup_user_limits (const char *uname)
 	 * FIXME: A better (smarter) checking should be done
 	 */
 	while (fgets (buf, 1024, fil) != NULL) {
-		if (('#' == buf[0]) || ('\n' == buf[0])) {
+		if (strprefix(buf, "#") || strprefix(buf, "\n")) {
 			continue;
 		}
 		MEMZERO(tempbuf);
@@ -402,7 +402,7 @@ static int setup_user_limits (const char *uname)
 				break;
 			} else if (streq(name, "*")) {
 				strcpy (deflimits, tempbuf);
-			} else if (name[0] == '@') {
+			} else if (strprefix(name, "@")) {
 				/* If the user is in the group, the group
 				 * limits apply unless later a line for
 				 * the specific user is found.

lib/nss.c

@@ -17,6 +17,7 @@
 #include "string/sprintf/snprintf.h"
 #include "string/strchr/stpspn.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -79,7 +80,7 @@ nss_init(const char *nsswitch_path) {
 	}
 	p = NULL;
 	while (getline(&line, &len, nssfp) != -1) {
-		if (line[0] == '#')
+		if (strprefix(line, "#"))
 			continue;
 		if (strlen(line) < 8)
 			continue;

lib/port.c

@@ -20,6 +20,7 @@
 #include "port.h"
 #include "prototypes.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -140,7 +141,7 @@ getportent(void)
 		errno = saveerr;
 		return NULL;
 	}
-	if ('#' == buf[0])
+	if (strprefix(buf, "#"))
 		goto next;
 
 	stpsep(buf, "\n");

lib/setupenv.c

@@ -29,6 +29,7 @@
 #include "string/sprintf/xasprintf.h"
 #include "string/strchr/stpspn.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strdup/xstrdup.h"
 #include "string/strtok/stpsep.h"
 
@@ -61,7 +62,7 @@ static void read_env_file (const char *filename)
 		cp = buf;
 		/* ignore whitespace and comments */
 		cp = stpspn(cp, " \t");
-		if (streq(cp, "") || ('#' == *cp)) {
+		if (streq(cp, "") || strprefix(cp, "#")) {
 			continue;
 		}
 		/*

lib/ttytype.c

@@ -18,6 +18,7 @@
 #include "getdef.h"
 #include "prototypes.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -47,7 +48,7 @@ void ttytype (const char *line)
 		return;
 	}
 	while (fgets (buf, sizeof buf, fp) == buf) {
-		if (buf[0] == '#') {
+		if (strprefix(buf, "#")) {
 			continue;
 		}
 

lib/yesno.c

@@ -14,7 +14,9 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+
 #include "prototypes.h"
+#include "string/strcmp/strprefix.h"
 
 
 /*
@@ -76,10 +78,9 @@ yes_or_no(bool read_only)
 static int
 rpmatch(const char *response)
 {
-	if (response[0] == 'y' || response[0] == 'Y')
+	if (strprefix(response, "y") || strprefix(response, "Y"))
 		return 1;
-
-	if (response[0] == 'n' || response[0] == 'n')
+	if (strprefix(response, "n") || strprefix(response, "N"))
 		return 0;
 
 	return -1;

src/check_subid_range.c

@@ -15,10 +15,11 @@
 #include "atoi/getnum.h"
 #include "atoi/str2i/str2u.h"
 #include "defines.h"
-#include "prototypes.h"
-#include "subordinateio.h"
 #include "idmapping.h"
+#include "prototypes.h"
 #include "shadowlog.h"
+#include "string/strcmp/strprefix.h"
+#include "subordinateio.h"
 
 
 static const char Prog[] = "check_subid_range";
@@ -42,7 +43,7 @@ main(int argc, char **argv)
 		exit(1);
 	if (str2ul(&count, argv[4]) == -1)
 		exit(1);
-	if (argv[2][0] == 'u') {
+	if (strprefix(argv[2], "u")) {
 		if (have_sub_uids(owner, start, count))
 			exit(0);
 		exit(1);

src/grpck.c

@@ -25,6 +25,7 @@
 #include "shadowlog.h"
 #include "sssd.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 
 #ifdef SHADOWGRP
 #include "sgroupio.h"
@@ -470,7 +471,7 @@ static void check_grp_file (int *errors, bool *changed)
 		 * Skip all NIS entries.
 		 */
 
-		if ((gre->line[0] == '+') || (gre->line[0] == '-')) {
+		if (strprefix(gre->line, "+") || strprefix(gre->line, "-")) {
 			continue;
 		}
 

src/login.c

@@ -40,6 +40,7 @@
 #include "string/memset/memzero.h"
 #include "string/sprintf/snprintf.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strcpy/strtcpy.h"
 #include "string/strdup/xstrdup.h"
 #include "string/strftime.h"
@@ -267,7 +268,7 @@ static void process_flags (int argc, char *const *argv)
 	 * clever telnet, and getty holes.
 	 */
 	for (arg = 1; arg < argc; arg++) {
-		if (argv[arg][0] == '-' && strlen (argv[arg]) > 2) {
+		if (strprefix(argv[arg], "-") && strlen(argv[arg]) > 2) {
 			usage ();
 		}
 		if (streq(argv[arg], "--")) {
@@ -349,7 +350,7 @@ static void init_env (void)
 	else {
 		cp = getdef_str ("ENV_TZ");
 		if (NULL != cp) {
-			addenv (('/' == *cp) ? tz (cp) : cp, NULL);
+			addenv(strprefix(cp, "/") ? tz(cp) : cp, NULL);
 		}
 	}
 #endif				/* !USE_PAM */
@@ -860,8 +861,8 @@ int main (int argc, char **argv)
 			 * login, even if they have been
 			 * "pre-authenticated."
 			 */
-			if (   ('!' == user_passwd[0])
-			    || ('*' == user_passwd[0])) {
+			if (   strprefix(user_passwd, "!")
+			    || strprefix(user_passwd, "*")) {
 				failed = true;
 			}
 
@@ -1019,7 +1020,7 @@ int main (int argc, char **argv)
 		addenv ("IFS= \t\n", NULL);	/* ... instead, set a safe IFS */
 	}
 
-	if (pwd->pw_shell[0] == '*') {	/* subsystem root */
+	if (strprefix(pwd->pw_shell, "*")) {  /* subsystem root */
 		pwd->pw_shell++;	/* skip the '*' */
 		subsystem (pwd);	/* figure out what to execute */
 		subroot = true;	/* say I was here again */

src/login_nopam.c

@@ -108,7 +108,7 @@ login_access(const char *user, const char *from)
 					 TABLE, lineno));
 				continue;
 			}
-			if (line[0] == '#') {
+			if (strprefix(line, "#")) {
 				continue;	/* comment line */
 			}
 			stpcpy(strrspn(line, " \t"), "");
@@ -139,7 +139,7 @@ login_access(const char *user, const char *from)
 		int err = errno;
 		SYSLOG ((LOG_ERR, "cannot open %s: %s", TABLE, strerror (err)));
 	}
-	return (!match || (line[0] == '+'))?1:0;
+	return (!match || strprefix(line, "+"))?1:0;
 }
 
 /* list_match - match an item against a list of tokens with exceptions */
@@ -228,7 +228,7 @@ static bool user_match (const char *tok, const char *string)
 	if (host != NULL) {
 		return user_match(tok, string) && from_match(host, myhostname());
 #if HAVE_INNETGR
-	} else if (tok[0] == '@') {	/* netgroup */
+	} else if (strprefix(tok, "@")) {	/* netgroup */
 		return (netgroup_match (tok + 1, NULL, string));
 #endif
 	} else if (string_match (tok, string)) {	/* ALL or exact match */
@@ -301,13 +301,13 @@ static bool from_match (const char *tok, const char *string)
 	 * if it matches the head of the string.
 	 */
 #if HAVE_INNETGR
-	if (tok[0] == '@') {	/* netgroup */
+	if (strprefix(tok, "@")) {  /* netgroup */
 		return (netgroup_match (tok + 1, string, NULL));
 	} else
 #endif
 	if (string_match (tok, string)) {	/* ALL or exact match */
 		return true;
-	} else if (tok[0] == '.') {	/* domain: match last fields */
+	} else if (strprefix(tok, ".")) {  /* domain: match last fields */
 		size_t  str_len, tok_len;
 
 		str_len = strlen (string);

src/newgrp.c

@@ -519,7 +519,7 @@ int main (int argc, char **argv)
 		 * Do the command line for "newgrp". It's just making sure
 		 * there aren't any flags and getting the new group name.
 		 */
-		if ((argc > 0) && (argv[0][0] == '-')) {
+		if ((argc > 0) && strprefix(argv[0], "-")) {
 			usage ();
 			goto failure;
 		} else if (argv[0] != NULL) {

src/passwd.c

@@ -35,6 +35,7 @@
 #include "string/memset/memzero.h"
 #include "string/sprintf/xasprintf.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #include "string/strcpy/strtcpy.h"
 #include "string/strdup/xstrdup.h"
 #include "time/day_to_str.h"
@@ -401,7 +402,7 @@ static void check_password (const struct passwd *pw, const struct spwd *sp)
 	 * changed. Passwords which have been inactive too long cannot be
 	 * changed.
 	 */
-	if (   (sp->sp_pwdp[0] == '!')
+	if (   strprefix(sp->sp_pwdp, "!")
 	    || (exp_status > 1)
 	    || (   (sp->sp_max >= 0)
 	        && (sp->sp_min > sp->sp_max))) {
@@ -438,7 +439,7 @@ static void check_password (const struct passwd *pw, const struct spwd *sp)
 
 static /*@observer@*/const char *pw_status (const char *pass)
 {
-	if (*pass == '*' || *pass == '!') {
+	if (strprefix(pass, "*") || strprefix(pass, "!")) {
 		return "L";
 	}
 	if (streq(pass, "")) {
@@ -519,7 +520,7 @@ static char *update_crypt_pw (char *cp)
 	if (dflg)
 		strcpy(cp, "");
 
-	if (uflg && *cp == '!') {
+	if (uflg && strprefix(cp, "!")) {
 		if (cp[1] == '\0') {
 			(void) fprintf (stderr,
 			                _("%s: unlocking the password would result in a passwordless account.\n"

src/pwck.c

@@ -29,6 +29,7 @@
 #include "shadowlog.h"
 #include "sssd.h"
 #include "string/strcmp/streq.h"
+#include "string/strcmp/strprefix.h"
 #ifdef WITH_TCB
 #include "tcbfuncs.h"
 #endif				/* WITH_TCB */
@@ -383,7 +384,7 @@ static void check_pw_file (int *errors, bool *changed)
 		 * If this is a NIS line, skip it. You can't "know" what NIS
 		 * is going to do without directly asking NIS ...
 		 */
-		if (('+' == pfe->line[0]) || ('-' == pfe->line[0])) {
+		if (strprefix(pfe->line, "+") || strprefix(pfe->line, "-")) {
 			continue;
 		}
 
@@ -708,7 +709,7 @@ static void check_spw_file (int *errors, bool *changed)
 		 * If this is a NIS line, skip it. You can't "know" what NIS
 		 * is going to do without directly asking NIS ...
 		 */
-		if (('+' == spe->line[0]) || ('-' == spe->line[0])) {
+		if (strprefix(spe->line, "+") || strprefix(spe->line, "-")) {
 			continue;
 		}