sbase

suckless unix tools
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commit efbce07f941f163a6705bb58250c1e3977d7e685
parent 7309302e25a05aaa69e1d65ac9ae70e82e32c1d9
Author: sin <sin@2f30.org>
Date:   Fri, 14 Feb 2014 15:01:15 +0000

Use sysconf() instead of HOST_NAME_MAX

Diffstat:
hostname.c | 17++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/hostname.c b/hostname.c @@ -15,7 +15,16 @@ usage(void) int main(int argc, char *argv[]) { - char host[HOST_NAME_MAX + 1]; + long sz; + char *host; + + sz = sysconf(_SC_HOST_NAME_MAX); + if (sz < 0) + sz = 255; + + host = malloc(sz + 1); + if (!host) + eprintf("malloc:"); ARGBEGIN { default: @@ -23,13 +32,15 @@ main(int argc, char *argv[]) } ARGEND; if (argc < 1) { - if (gethostname(host, sizeof(host)) < 0) + if (gethostname(host, sz + 1) < 0) eprintf("gethostname:"); puts(host); } else { - if (sethostname(argv[0], strlen(argv[0])) < 0) + if (sethostname(argv[0], sz + 1) < 0) eprintf("sethostname:"); } + free(host); + return EXIT_SUCCESS; }