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Implement first instance of NOFORK applet - echo

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find: use NOFORK/NOEXEC; small -exec buglet also eliminated
vfork_daemon_rexec: honor PREFER_APPLETS
echo: small size improvements

find -exec echo {} \; with PREFER_APPLETS=y runs 4 times faster
This commit is contained in:
Denis Vlasenko
2007-04-09 13:04:50 +00:00
parent 2dfdd44d9d
commit 7e754f12d3
6 changed files with 77 additions and 50 deletions
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9
libbb/process_escape_sequence.c
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@@ -8,9 +8,6 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
#include <limits.h>
#include <ctype.h>
#include "libbb.h"
#define WANT_HEX_ESCAPES 1
@@ -46,10 +43,10 @@ char bb_process_escape_sequence(const char **ptr)
#endif
do {
d = (unsigned int)(*q - '0');
d = (unsigned char)(*q) - '0';
#ifdef WANT_HEX_ESCAPES
if (d >= 10) {
d = ((unsigned int)(_tolower(*q) - 'a')) + 10;
d = (unsigned char)(_tolower(*q)) - 'a' + 10;
}
#endif
@@ -80,7 +77,7 @@ char bb_process_escape_sequence(const char **ptr)
break;
}
} while (*++p);
n = *(p+(sizeof(charmap)/2));
n = *(p + (sizeof(charmap)/2));
}
*ptr = q;

8
libbb/vfork_daemon_rexec.c
View File

@@ -26,14 +26,16 @@ pid_t spawn(char **argv)
volatile int failed;
pid_t pid;
// Be nice to nommu machines.
// Ain't it a good place to fflush(NULL)?
/* Be nice to nommu machines. */
failed = 0;
pid = vfork();
if (pid < 0) /* error */
return pid;
if (!pid) { /* child */
/* Don't use BB_EXECVP tricks here! */
execvp(argv[0], argv);
/* This macro is ok - it doesn't do NOEXEC/NOFORK tricks */
BB_EXECVP(argv[0], argv);
/* We are (maybe) sharing a stack with blocked parent,
* let parent know we failed and then exit to unblock parent