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Audit printenv(1)

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1) argc style
2) safeguard argv-loop as already seen in echo(1) with argc-decrement.
This commit is contained in:
FRIGN 2015-02-28 21:47:17 +01:00
parent 6f715d8c6d
commit 0226c05105
3 changed files with 7 additions and 6 deletions
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2
README
View File

@ -51,7 +51,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
= nl no -d, -f, -h, -l, -p
=* nohup yes none
#* paste yes none
=* printenv non-posix none
=*| printenv non-posix none
#* printf yes none
=* pwd yes none
= readlink non-posix none

2
echo.c
View File

@ -23,7 +23,7 @@ main(int argc, char *argv[])
} ARGEND;
for (; argc > 0; argc--, argv++)
putword(argv[0]);
putword(*argv);
if (!nflag)
putchar('\n');

9
printenv.c
View File

@ -9,7 +9,7 @@ extern char **environ;
static void
usage(void)
{
eprintf("usage: %s [variable...]\n", argv0);
eprintf("usage: %s [var ...]\n", argv0);
}
int
@ -23,16 +23,17 @@ main(int argc, char *argv[])
usage();
} ARGEND;
if (argc == 0) {
if (!argc) {
while (*environ)
printf("%s\n", *environ++);
} else {
while (*argv) {
if ((var = getenv(*argv++)))
for (; argc > 0; argc--, argv++) {
if ((var = getenv(*argv)))
printf("%s\n", var);
else
ret = 1;
}
}
return ret;
}