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getusershell: skip blank lines and comments

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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.
This commit is contained in:
Rich Felker 2024-06-21 20:54:30 -04:00
parent 53ac44ff4c
commit ab31e9d6a0
1 changed files with 4 additions and 2 deletions
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6
src/legacy/getusershell.c
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@ -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;
}