24 lines
644 B
C
24 lines
644 B
C
#define _POSIX_C_SOURCE 200809L
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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int main(int argc, char * argv[]) {
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char * logname = getlogin(); /* get current user's name */
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/* If we didn't get their name, find out why. */
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if(logname == NULL) {
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switch(errno) {
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case EMFILE: fprintf(stderr, "%s: all file descriptors open\n", argv[0]);
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break;
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case ENFILE: fprintf(stderr, "%s: too many files open", argv[0]); break;
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default: fprintf(stderr, "%s: other/unknown error", argv[0]);
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}
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return 1;
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}
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else {
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printf("%s\n", logname); /* Print their name */
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return 0;
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}
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} |