musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2024年06月21日 20:54:30 -0400
committer	Rich Felker <dalias@aerifal.cx>	2024年06月21日 20:54:30 -0400
commit	ab31e9d6a0fa7c5c408856c89df2dfb12c344039 (patch)
tree	9cb51edb58bab3e0a5875fc18e3cf952ceac0450 /src/legacy/getusershell.c
parent	53ac44ff4c0e91536e1e34e8e59e19d2a1196a67 (diff)
download	musl-ab31e9d6a0fa7c5c408856c89df2dfb12c344039.tar.gz

getusershell: skip blank lines and comments

this interface does not have a lot of historical consensus on how it handles the contents of the /etc/shells file in regard to whitespace and comments, but the commonality between all checked is that they ignore lines that are blank or that begin with '#', so that is the behavior we adopt.

Diffstat (limited to 'src/legacy/getusershell.c')

-rw-r--r--

src/legacy/getusershell.c

1 files changed, 4 insertions, 2 deletions

diff --git a/src/legacy/getusershell.c b/src/legacy/getusershell.c
index 5fecdec2..1c5d98ec 100644
--- a/src/legacy/getusershell.c
+++ b/src/legacy/getusershell.c

@@ -25,8 +25,10 @@ char *getusershell(void)

ssize_t l;

if (!f) setusershell();

if (!f) return 0;

- l = getline(&line, &linesize, f);

- if (l <= 0) return 0;

+ do {

+ l = getline(&line, &linesize, f);

+ if (l <= 0) return 0;

+ } while (line[0] == '#' || line[0] == '\n');

if (line[l-1]=='\n') line[l-1]=0;

return line;

}

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