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debloat code that depends on /proc/self/fd/%d with shared function

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I intend to add more Linux workarounds that depend on using these
pathnames, and some of them will be in "syscall" functions that, from
an anti-bloat standpoint, should not depend on the whole snprintf
framework.
This commit is contained in:
Rich Felker
2013-08-02 12:59:45 -04:00
parent 0dc4824479
commit c8c0844f7f
5 changed files with 26 additions and 6 deletions
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7
src/process/fexecve.c
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@ -2,11 +2,12 @@
#include <stdio.h>
#include <errno.h>
void __procfdname(char *, unsigned);
int fexecve(int fd, char *const argv[], char *const envp[])
{
static const char proc[] = "/proc/self/fd/%d";
char buf[sizeof proc + 3*sizeof(int)];
snprintf(buf, sizeof buf, proc, fd);
char buf[15 + 3*sizeof(int)];
__procfdname(buf, fd);
execve(buf, argv, envp);
if (errno == ENOENT) errno = EBADF;
return -1;