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libspl: lift common bits of getexecname()

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Merge the actual implementations of getexecname() and slightly clean
up the FreeBSD one.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #11879
This commit is contained in:
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2021-04-10 03:28:53 +02:00
committed by Brian Behlendorf
parent 375bdb2b20
commit 2d14207c98
5 changed files with 99 additions and 72 deletions
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lib/libspl/os/linux/getexecname.c
+5 -32
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@@ -19,41 +19,14 @@
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <limits.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include "../../libspl_impl.h"
const char *
getexecname(void)
__attribute__((visibility("hidden"))) ssize_t
getexecname_impl(char *execname)
{
static char execname[PATH_MAX + 1] = "";
static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
char *ptr = NULL;
ssize_t rc;
(void) pthread_mutex_lock(&mtx);
if (strlen(execname) == 0) {
rc = readlink("/proc/self/exe",
execname, sizeof (execname) - 1);
if (rc == -1) {
execname[0] = '\0';
} else {
execname[rc] = '\0';
ptr = execname;
}
} else {
ptr = execname;
}
(void) pthread_mutex_unlock(&mtx);
return (ptr);
return (readlink("/proc/self/exe", execname, PATH_MAX));
}